Multi-association risk real-time evaluation terminal and method based on dangerous chemical accident information

Abstract

The invention discloses a multi-association risk real-time evaluation terminal and method based on dangerous chemical accident information. The terminal comprises a collector, a signal transmitter, a memory, a controller, an arithmetic unit and an output end, the terminal is utilized to acquire the structured text information of the dangerous chemical accident in real time, and the dangerous chemical accident area risk evaluation index system based on the text information is utilized to evaluate the dangerous chemical accident area risk. The risk level of the dangerous chemical accident is quantitatively evaluated in real time, and the possibility and severity level of the secondary accident in the surrounding area of the dangerous chemical accident are determined by combining the accident risk level, the historical accident evolution law and the accident surrounding major hazard source distribution condition. After the risk of the surrounding area of the dangerous chemical accident is evaluated in real time and the consequence is graded by using the safety risk matrix, the risk grade of the dangerous chemical accident and the risk grade of the surrounding area are pushed to a related principal in time, accurate evaluation and early warning of the risk of the dangerous chemical accident area are realized, and the application prospect is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of multi - related risk assessment, and particularly to a multi - related risk real - time assessment terminal and method based on hazardous chemical accident information. Background Art

[0002] As an important pillar industry of the national economy, the chemical industry in China has witnessed a rapid growth in the overall scale and output value at the present stage, and the industry is developing steadily and well. However, compared with the United States, Japan, and Western Europe, the total number of chemical accidents in China is relatively large, the foundation of work safety is relatively weak, the work safety situation is still severe, and accidents in the hazardous chemical industry are still in a high - incidence state. Especially in the production, storage, transportation and other links of hazardous chemicals, due to the flammable and explosive characteristics of most of the involved materials and the production processes mostly involving high temperature and high pressure, accidents frequently occur in these links. Hazardous chemical accidents are prone to occur suddenly, have special forms of harm, and are difficult to rescue. Most of them show significant domino chain effects. Whether the accident emergency disposal is timely and effective largely determines the subsequent development direction of the accident. At the same time, whether the personnel evacuation and surrounding protection measures are reasonable also directly affects the secondary losses and impacts caused by hazardous chemical accidents.

[0003] Currently, after a hazardous chemical accident occurs, neighboring enterprises and residents often cannot obtain the hazard information of the accident area and its surrounding areas in the first time, lacking an intuitive, rapid, and reliable judgment and understanding of the risk level of the surrounding area of the accident and the potential consequences of the accident occurrence, which may cause unnecessary panic or casualties. Moreover, local relevant departments and fire rescue teams have always lacked a terminal and method that can be used to intuitively judge and dispose of hazardous chemical accidents.

[0004] In recent years, with the rapid development of the Internet and the self - media industry, the spontaneity, real - time nature, and coverage of information dissemination have been greatly improved. The particularity of hazardous chemical accidents also determines that they receive a high degree of attention from people from all walks of life and have a high degree of spontaneous dissemination heat, thus laying a foundation for quickly and real - time automatically collecting and capturing hazardous chemical accident information through network channels. Through the extraction and screening of information, relevant quantitative data for characterizing the severity of hazardous chemical accidents can be obtained and used to quickly assess the accident hazard.

[0005] Therefore, there is an urgent need to propose a multi - related risk real - time assessment terminal and method based on hazardous chemical accident information, which can quickly assess the risk level of the area where a hazardous chemical accident occurs based on the hazardous chemical accident information, help relevant staff and fire rescue teams in the area where a hazardous chemical accident occurs and its surrounding areas to timely master the basic situation and risk level of the hazardous chemical accident, and timely push risk information to key groups. Summary of the Invention

[0006] In view of the problem that it is difficult to quickly evaluate the risk level of the hazardous chemical accident area based on the obtained hazardous chemical accident information and timely push the early warning key population at the present stage, the present invention proposes a multi - associated risk real - time evaluation terminal and method based on hazardous chemical accident information, which automatically and real - time obtains the structured information of hazardous chemical accidents through the Internet, and combines key accident elements such as location, category, type of substance and the impact caused, and combines the safety risk matrix and the hazard analysis of the accident area to realize the accurate evaluation and early warning of the risk of the hazardous chemical accident area, which helps the key population to master the dynamic changes of the risk level of the hazardous chemical accident area in the region and has a wide application prospect.

[0007] The present invention specifically adopts the following technical solutions:

[0008] A multi - associated risk real - time evaluation terminal based on hazardous chemical accident information includes a collector, a numbering device, a memory, a controller, an arithmetic unit and an output end;

[0009] An automatic search engine is arranged in the collector, which is used to retrieve the web pages related to hazardous chemical accidents in the Internet and obtain the web page information;

[0010] The input end of the numbering device is connected to the collector, and the output end is connected to the memory. It is used to filter the duplicate web pages in the collector, assign numbers to each of the screened web pages, and send the numbers and web addresses of the retrieved web pages to the memory for storage;

[0011] The memory is respectively connected to the controller, the arithmetic unit and the output end. It is used to receive and store the numbers and web addresses of the web pages transmitted by the collector, transfer the stored data to the controller and the arithmetic unit, and store the operation results of the controller and the arithmetic unit;

[0012] The controller is connected to the arithmetic unit, which is used to control the arithmetic unit to process the hazardous chemical accident information collected by the collector through retrieval;

[0013] A risk evaluation index system for hazardous chemical accident areas is preset in the arithmetic unit, which is used to perform fuzzy matching on the hazardous chemical accident information collected by the collector through retrieval. By using the directed crawler to extract and store the information on casualties, occurrence area and accident type of hazardous chemical accidents, combining with the public opinion heat analysis information, fuzzy matching is used to extract structured text data, and real - time analysis is carried out based on the semantic analysis tool of the neural network to obtain the risk value of the accident in real - time and classify it based on the matrix;

[0014] The output end is used to conduct a risk evaluation on the hazardous chemical accident according to the accident occurrence time, accident occurrence location, accident type and casualty situation extracted by the arithmetic unit, determine and output the risk level of the hazardous chemical accident, and timely remind the relevant staff.

[0015] Preferably, the web page information on the Internet is mainly in HTML structure, with hypertext tags in logical format.

[0016] Preferably, a Bloom filter is preset in the number dispenser.

[0017] Preferably, the information on hazardous chemical accidents in the arithmetic unit is processed using the extended TF indexing method TFE. A word segmentation dictionary is also pre-constructed in the arithmetic unit based on the subject field of hazardous chemical accidents, which is used to screen out non-topic words in each tag of the web page information.

[0018] Preferably, an AC automaton multi-pattern string matching algorithm is preset in the arithmetic unit, which is used to retain the plain text content under the key tags to be processed after screening, and automatically preprocesses to remove the words with no clear meaning in the plain text content.

[0019] Preferably, a text relation extraction model is set in the arithmetic unit. The text relation extraction model is constructed based on a multi-channel convolutional neural network, which is used to analyze the syntactic features and semantic features of the text and realize end-to-end relation extraction.

[0020] Preferably, a Sunday algorithm string matching algorithm is also set in the arithmetic unit, which is used to perform fuzzy matching between the prefabricated structured information on hazardous chemical accidents and the collected accident structured text to determine the main attribute tags.

[0021] Preferably, the main attribute tags include the accident occurrence time, accident occurrence location, accident type, and casualty situation.

[0022] A multi-correlation risk real-time evaluation method based on hazardous chemical accident information, using the multi-correlation risk real-time evaluation terminal based on hazardous chemical accident information as described above, specifically includes the following steps:

[0023] Step 1: Use the multi-correlation risk real-time evaluation terminal based on hazardous chemical accident information to obtain the unstructured text information of hazardous chemical accidents in real time.

[0024] Step 2: Construct a risk evaluation index system for hazardous chemical accident areas, and use the constructed risk evaluation index system for hazardous chemical accident areas to determine the risk level of hazardous chemical accidents.

[0025] Step 3: Based on the unstructured text information of hazardous chemical accidents, combine historical data to determine the possibility level of secondary accidents and the severity level of accidents in the surrounding areas of hazardous chemical accidents. Use a safety risk matrix to perform real-time evaluation and consequence rating on the risks in the surrounding areas of hazardous chemical accidents.

[0026] Step 4: Use the output end of the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to push the risk level of the hazardous chemical accident and the risk level of secondary accidents of hazardous chemicals to the emergency management personnel and enterprise safety responsible persons preset at each level in a hierarchical sending manner, so as to remind the emergency management personnel and enterprise safety responsible persons at each level.

[0027] Preferably, in the said Step 1, it specifically includes the following steps:

[0028] Step 1.1: Turn on the multi - related risk real - time evaluation terminal based on hazardous chemical accident information. Use the collector in the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to retrieve the web pages related to hazardous chemical accidents on the Internet, obtain the web page information, and send the obtained web page information to the numbering device.

[0029] Step 1.2: Based on the breadth - first algorithm and the persistent remote dictionary service, use the Bloom filter preset in the numbering device to perform duplicate removal processing on the web page information collected by the collector. After duplicate removal processing, use the numbering device to assign numbers to each web page so that each web page has a unique number, and send the numbers and website addresses of all web pages to the memory for storage.

[0030] Step 1.3: Use the controller to control the arithmetic unit to classify the labels in the web page information according to the web page information corresponding to each web page number and in combination with the structural characteristics of the HTML file, using the extended TF indexing method TFE. Divide the labels with similar importance factors into the same category, and use the word - segmentation dictionary to screen out the non - topic words in the same category of labels to obtain the screened labels.

[0031] Step 1.4: Use the AC automaton multi - pattern string matching algorithm preset in the arithmetic unit to delete the text content irrelevant to hazardous chemical accidents in the labels at one time, and only retain the pure text content related to hazardous chemical accidents. Then use the arithmetic unit to pre - process the obtained pure text content to remove the words with no clear meaning in the pure text content, and obtain the pure text file processed by the AC automaton multi - pattern string matching algorithm.

[0032] Step 1.5: Input the pure text file processed by the AC automaton multi - pattern string matching algorithm into the text relationship extraction model preset in the arithmetic unit. The text relationship extraction model is constructed based on a multi - channel convolutional neural network. Use the shortest dependency path algorithm of the multi - channel convolutional neural network to model sentences, integrate syntactic analysis and deep learning, extract text relationships, parse the syntactic features and semantic features of the text, obtain the extraction result of the text relationship extraction model, and output the processed accident structured text.

[0033] Step 1.6, using the Sunday algorithm string matching algorithm, perform fuzzy matching between the prefabricated structured information of hazardous chemical accidents and the processed accident structured text, obtain the main attribute tags of the accident structured text, and splice and arrange the accident structured text in the preset information order to obtain the unstructured text information of hazardous chemical accidents.

[0034] Preferably, the text relation extraction model is set as the MCNN_Att_RL model based on the multi-channel mechanism;

[0035] The MCNN_Att_RL model based on the multi-channel mechanism includes a vector mapping layer, an attention layer, a convolutional layer, a segmented average pooling layer, a max pooling layer, and a fully connected layer;

[0036] When the word vector is input into the MCNN_Att_RL model based on the multi-channel mechanism, the word vector will be respectively input and mapped into a two-channel convolutional neural network for processing. The two-channel convolutional neural network includes a first channel and a second channel. Among them, an attention mechanism is added to the second channel to obtain an entity-oriented vector representation. After obtaining multiple channel information through the two-channel convolutional neural network, it will be divided into multiple segments of information according to the entity position and integrated into the sentence structure information through the average pooling layer. After that, the final representation of the sentence is learned through the max pooling layer and output to obtain the extraction result;

[0037] The two-channel convolutional neural network uses the first channel and the second channel to fuse two types of word vectors to obtain different semantic features of words. Among them, pre-trained Chinese word vectors are used in the first channel, and specific Chinese word vectors are used in the second channel;

[0038] The attention layer automatically captures the correlation between words and sentences by introducing an attention mechanism. An attention matrix is set in the attention layer. By using the attention matrix to calculate the correlation between each word in the input text content and the hazardous chemical accident, a correlation matrix is calculated to obtain a vector for the entity pair, and a sentence vector integrating semantic information is obtained;

[0039] Filters are set in the convolutional layer to learn different n-gram features; when the sentence vector integrating semantic information is input into the convolutional layer, the filters in the convolutional layer perform convolution operations on the sentence vector integrating semantic information to obtain local features of the sentence. By performing convolution operations on the sentence vector integrating semantic information multiple times, high-order sentence features are obtained, and the processed feature vector is obtained and input into the average pooling layer;

[0040] The average pooling layer is used to remove the structural information of the sentence later. After dividing the input feature vectors into multiple segments, determining the start and end positions of each segment of feature vectors, each segment of feature vectors is respectively input into the average pooling layer for processing and then fused to obtain the feature vectors incorporating the sentence structure information, and the feature vectors incorporating the sentence structure information are input into the max pooling layer;

[0041] The max pooling layer is used to perform a maximization operation on the feature vectors incorporating the sentence structure information, obtain the final output feature information, and transmit it to the fully connected layer for global adjustment for output, so as to obtain the extraction result of the word vectors by the MCNN_Att_RL model based on the multi-channel mechanism, and output the processed accident structured text.

[0042] Preferably, a Softmax classification function and a loss function are set in the MCNN_Att_RL model based on the multi-channel mechanism. Among them, the Softmax classification function is used to calculate the relationship probability, and the correlation between the sentence vector and the relationship category is used as the score; the loss function adopts a margin-based ranking loss function.

[0043] Preferably, the MCNN_Att_RL model based on the multi-channel mechanism is trained using the Adadelta optimization algorithm.

[0044] Preferably, in step 2, it specifically includes the following steps:

[0045] Step 2.1, using the risk degree analysis method, combining the regulations on the individual risk benchmark and the social risk benchmark in "GB 36894-2018 Risk Criteria for Hazardous Chemical Production Devices and Storage Facilities", according to the personnel injuries, property losses, social impacts and the severity of the consequences of hazardous chemical accidents in the hazardous chemical accident area, determine the risk level of the hazardous chemical accident based on the safety risk matrix;

[0046] The risk levels of the hazardous chemical accidents are divided into four levels, namely major risk, relatively large risk, general risk, and low risk;

[0047] Step 2.2, according to the possibility and severity of the occurrence of the personnel health impacts, property loss impacts, and social impacts that the hazardous chemical accident may cause, divide the severity levels of the hazardous chemical accident from the dimensions of personnel health, accident category and occurrence location, and the dimension of public opinion discussion heat, determine the severity levels of the hazardous chemical accident under each dimension. The severity levels of the hazardous chemical accident under each dimension all include seven levels, namely level A, level B, level C, level D, level E, level F, and level G;

[0048] Step 2.3: Determine the risk score of the hazardous chemical accident according to the dimensional levels of the hazardous chemical accident, and determine the risk level of the hazardous chemical accident in combination with the mapping relationship between the risk score and the risk value.

[0049] Preferably, in Step 2.2, according to the possibility and severity of the personnel health impact, property loss impact, and social impact that may be caused by the hazardous chemical accident, divide the severity level of the hazardous chemical accident from the dimensions of personnel health, accident category and location, and the dimension of public opinion discussion heat. The specific classification criteria are as follows:

[0050] Based on the dimension of personnel health, determine the severity level X1 of the hazardous chemical accident according to the impact of the hazardous chemical accident on personnel health and safety. The value of the severity level X1 of the hazardous chemical accident is determined according to the severity level. The judgment criteria for the severity level X1 of the hazardous chemical accident are as follows:

[0051] Classify the hazardous chemical accident that causes slight impact on health / safety as Level A; classify the hazardous chemical accident that causes moderate impact on health / safety as Level B; classify the hazardous chemical accident that causes relatively large impact on health / safety as Level C; classify the hazardous chemical accident that causes relatively large safety accident resulting in death or serious injury of personnel as Level D; classify the hazardous chemical accident that causes serious safety accident as Level E; classify the hazardous chemical accident that causes very major safety accident as Level F; classify the hazardous chemical accident that causes particularly major catastrophic safety accident with a large number of casualties inside or outside the factory area as Level G;

[0052] The judgment criteria for the hazardous chemical accident that causes slight impact on health / safety are as follows:

[0053] When the hazardous chemical accident occurs, the injured person needs first aid treatment or medical treatment, but does not need to be hospitalized, and there will be no loss of working days due to the injury of the hazardous chemical accident; the injured person feels unwell due to short-term exposure exceeding the standard, but it will not cause long-term health impacts, and generally there are no casualties or no casualties are found;

[0054] The judgment criteria for the hazardous chemical accident that causes moderate impact on health / safety are as follows:

[0055] The occurrence of the hazardous chemical accident causes 1 to 2 people to be slightly injured;

[0056] The judgment criteria for the hazardous chemical accident that causes relatively large impact on health / safety are as follows:

[0057] The occurrence of the hazardous chemical accident causes more than 3 people to be slightly injured or 1 to 2 people to be seriously injured. When the hazardous chemical accident occurs, the personnel are exposed to exceed the standard and cause serious occupational diseases or long-term impact on the health of personnel;

[0058] The judgment criteria for the hazardous chemical accident that causes relatively large safety accident resulting in death or serious injury of personnel are as follows:

[0059] The occurrence of the hazardous chemical accident results in 1 - 2 deaths or 3 - 9 serious injuries within the plant boundary; 1 - 2 serious injuries outside the plant boundary;

[0060] The criteria for determining a hazardous chemical accident that causes a serious safety accident are as follows:

[0061] The occurrence of the hazardous chemical accident results in 3 - 9 deaths or 10 - 50 serious injuries within the plant boundary; 1 - 2 deaths or 3 - 9 serious injuries outside the plant boundary;

[0062] The criteria for determining a hazardous chemical accident that causes an extremely serious safety accident are as follows:

[0063] The occurrence of the hazardous chemical accident results in 10 - 30 deaths or 50 - 100 serious injuries within the plant boundary; 3 - 9 deaths or 10 - 50 serious injuries outside the plant boundary;

[0064] The criteria for determining a particularly serious catastrophic safety accident of a hazardous chemical accident that causes a large number of casualties within or outside the plant boundary are as follows:

[0065] The occurrence of the hazardous chemical accident results in more than 30 deaths or more than 100 serious injuries within the plant boundary; more than 10 deaths or more than 50 serious injuries outside the plant boundary;

[0066] Based on the dimensions of accident type and occurrence location, determine the severity level X2 of the hazardous chemical accident according to the impact of the hazardous chemical accident on property damage. The value of the severity level X2 of the hazardous chemical accident is determined according to the severity level. The criteria for determining the severity level X2 of the hazardous chemical accident are as follows:

[0067] If the occurrence of the hazardous chemical accident causes damage to equipment or an unplanned shutdown of the device, the severity level of the hazardous chemical accident is classified as level A;

[0068] If the hazardous chemical accident occurs in an open area and causes a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident is classified as level B;

[0069] If the occurrence of the hazardous chemical accident causes a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident is classified as level C;

[0070] If the occurrence of the hazardous chemical accident causes 3 or more sets of devices to stop and local area controllable fires, explosions, and toxicant diffusion occur, the severity level of the hazardous chemical accident is classified as level D;

[0071] If the hazardous chemical accident is an uncontrollable leakage near a high - accident - consequence area, the severity level of the hazardous chemical accident is classified as level E;

[0072] If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion occurring in the medium accident consequence area, the severity level of the hazardous chemical accident is classified as Level F;

[0073] If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion occurring in the high accident consequence area, the severity level of the hazardous chemical accident is classified as Level G;

[0074] Based on the dimension of public opinion discussion heat, the severity level X3 of the hazardous chemical accident is determined according to the social impact of the hazardous chemical accident. The value of the severity level X3 of the hazardous chemical accident is determined according to the severity level. The judgment criteria for the severity level X3 of the hazardous chemical accident are as follows:

[0075] If the occurrence of the hazardous chemical accident causes short-term dissatisfaction, complaints, or complaints from a small number of residents in the surrounding community, the number of retrieved information is extremely small, and there is no official news channel report, the severity level of the hazardous chemical accident is classified as Level A;

[0076] If the occurrence of the hazardous chemical accident is reported by the local media in the short term and causes interference to the daily operation of local public facilities, and there are local fire short text reports, the severity level of the hazardous chemical accident is classified as Level B;

[0077] If the occurrence of the hazardous chemical accident is reported by the local media in the long term and causes adverse social impacts locally, seriously interferes with the daily operation of local public facilities, and there are local fire text reports, the severity level of the hazardous chemical accident is classified as Level C;

[0078] If the occurrence of the hazardous chemical accident has caused local relevant regulatory departments to take mandatory measures, or is negatively reported by domestic or international media in the short term, and there are local fire text and picture reports, the severity level of the hazardous chemical accident is classified as Level D;

[0079] If the occurrence of the hazardous chemical accident has attracted long-term attention from domestic or international media, has caused adverse social impacts within the provincial scope, seriously interfered with the daily operation of provincial public facilities, caused provincial relevant departments to take mandatory measures, or led to the revocation of production, operation, and sales licenses in the local market, and there are reports from provincial departments, municipal emergency management, text, pictures, and videos, the severity level of the hazardous chemical accident is classified as Level E;

[0080] If the occurrence of the hazardous chemical accident has caused relevant departments to take mandatory measures, has caused serious social impacts nationwide, attracted key follow-up reports or series reports from domestic and international media, and there are reports from ministries, provincial, and municipal emergency management, text, pictures, and videos, the severity level of the hazardous chemical accident is classified as Level F;

[0081] If the occurrence of a hazardous chemical accident has led to the revocation of production, sales, or operation licenses in the main domestic and international markets, caused strong indignation or condemnation among the public or investors in the main domestic and international markets, and there are reports and coverage by mainstream media, the severity level of the hazardous chemical accident will be classified as Level G.

[0082] Among the severity levels of hazardous chemical accidents in each dimension, the score corresponding to Level A is 1 point, the score corresponding to Level B is 2 points, the score corresponding to Level C is 3 points, the score corresponding to Level D is 4 points, the score corresponding to Level E is 5 points, the score corresponding to Level F is 6 points, and the score corresponding to Level G is 7 points.

[0083] Multiply the scores determined in the dimensions of personnel health, accident category and occurrence location, and the degree of public opinion discussion heat to obtain the risk score of the hazardous chemical accident.

[0084] Preferably, the calculation formula for the risk score X is:

[0085] X = X1X2X3 (1)

[0086] In the formula, X is the risk score, X1 is the value of the severity level of the hazardous chemical accident, X2 is the value of the severity level of the hazardous chemical accident, and X3 is the value of the severity level of the hazardous chemical accident.

[0087] The mapping relationship between the risk score and the risk value is:

[0088]

[0089] In the formula, W is the risk value.

[0090] Determine the risk level of the hazardous chemical accident according to the risk value. When the value range of the risk value is (75, 100], determine the risk level of the hazardous chemical accident as a red risk; when the value range of the risk value is (50, 75], determine the risk level of the hazardous chemical accident as an orange risk; when the value range of the risk value is (20, 50], determine the risk level of the hazardous chemical accident as a yellow risk; when the value range of the risk value is [0, 20], determine the risk level of the hazardous chemical accident as a blue risk.

[0091] Preferably, in step 3, it specifically includes the following steps:

[0092] Step 3.1, based on the structured text information of the hazardous chemical accident, combined with the risk transfer laws of different types of accidents, calculate the risk evolution probability P of the hazardous chemical accident, and determine the likelihood level L of secondary accidents occurring in the surrounding areas of the accident.

[0093] Step 3.2: Calculate the severity S of secondary accidents occurring in the surrounding area of the hazardous chemical accident, and determine the severity level N of secondary accidents occurring in the surrounding area of the hazardous chemical accident;

[0094] Step 3.3: According to the likelihood level of secondary accidents occurring in the surrounding area of the hazardous chemical accident and the severity level of secondary accidents occurring in the surrounding area of the hazardous chemical accident, determine the risk value R of the hazardous chemical secondary accident;

[0095] Step 3.4: Determine the secondary accident risk score K according to the risk value R of the hazardous chemical secondary accident, and use the safety risk matrix to conduct real-time evaluation of the risk of the hazardous chemical secondary accident to determine the risk level of the hazardous chemical secondary accident.

[0096] Step 3.5: According to the risk classification of the hazardous chemical accident and the risk level of the hazardous chemical secondary accident, give reminders and warnings about the major hazard sources in the surrounding area of the accident area.

[0097] Preferably, in step 3.1, by conducting fault tree analysis on domestic and foreign hazardous chemical accidents that have occurred, taking the types of hazardous chemicals as the first-level classification, counting the number of accidents of the same type of hazardous chemicals and the number of accidents in each evolution sequence, and establishing a statistical matrix X(a, b, c) of the number of accidents in different evolution sequences;

[0098] In the statistical matrix X(a, b, c) of the number of accidents in different evolution sequences, the row index is the type of substance, the column index is the current accident type, and the depth index is the type of secondary accident; the value range of the row index is set to 0 to x, where x is the total number of hazardous chemical accident substances counted; the value of the column index is set to 0 to 2, where 0 represents the initial accident as leakage, 1 represents the initial accident as fire, and 2 represents the initial accident as explosion; the value of the depth index is 0 to 2, 0 represents the secondary accident as leakage, 1 represents the secondary accident as fire, and 2 represents the secondary accident as explosion;

[0099] Obtain the risk evolution probability matrix of different hazardous chemical accidents. Among them, the value of the current accident state b is determined by structured text information. Based on the risk evolution probability matrix of different hazardous chemical accidents, the calculation formula for the risk evolution probability P of the hazardous chemical accident is:

[0100]

[0101] In the formula, P(a, b, c) is the evolution probability of hazardous chemical a occurring a secondary accident of type c in the current accident state;

[0102] X(a, b, c) is the number of accidents of hazardous chemical a occurring a secondary accident of type c in the current accident state;

[0103] a, b, and c are all the names of hazardous chemicals;

[0104] is the total number of various accidents of hazardous chemical a;

[0105] Based on the evolution probability of a specified secondary accident occurring for a hazardous chemical in the current accident state, the probability of a secondary accident occurring for the hazardous chemical in the current accident state is calculated as shown in formula (4):

[0106]

[0107] In the formula, P a is the probability of a secondary accident occurring for hazardous chemical a in the current accident state.

[0108] Preferably, in step 3.1, the possibility levels of the occurrence of the secondary accident are set from low to high as level 1, level 2, level 3, level 4, level 5, level 6, and level 7; the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident is determined according to the evolution probability P of the hazardous chemical accident risk, and the value of the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident takes values from 1 to 7 corresponding to levels 1 to 7;

[0109] Among them, if the probability of a secondary accident occurring for the hazardous chemical in the current accident state does not exceed 10 -6 , then it is determined that the possibility level of the occurrence of the secondary accident is level 1, and the value of the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident is 1;

[0110] If the probability value range of the occurrence of the secondary accident for the hazardous chemical in the current accident state is (10 -6 , 10 -5 , then it is determined that the possibility level of the occurrence of the secondary accident is level 2, and the value of the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident is 2;

[0111] If the probability value range of the occurrence of the secondary accident for the hazardous chemical in the current accident state is (10 -5 , 10 -4 , then it is determined that the possibility level of the occurrence of the secondary accident is level 3, and the value of the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident is 3;

[0112] If the probability value range of the occurrence of the secondary accident for the hazardous chemical in the current accident state is (10 -4 , 10 -3 , then it is determined that the possibility level of the occurrence of the secondary accident is level 4, and the value of the possibility level L of the occurrence of the secondary accident in the peripheral area of the accident is 4;

[0113] If the probability value range of the occurrence of the secondary accident for the hazardous chemical in the current accident state is (10 -3 , 10 -2, it is determined that the possibility level of secondary accidents is level 5, and the value of the possibility level L of secondary accidents in the surrounding area of the accident is 5;

[0114] If the probability range of secondary accidents occurring for hazardous chemicals in the current accident state is (10 -2 , 10 -1 , it is determined that the possibility level of secondary accidents is level 6, and the value of the possibility level L of secondary accidents in the surrounding area of the accident is 6;

[0115] If the probability range of secondary accidents occurring for hazardous chemicals in the current accident state is (10 -1 , 1], it is determined that the possibility level of secondary accidents is level 7, and the value of the possibility level L of secondary accidents in the surrounding area of the accident is 7.

[0116] Preferably, in step 3.2, by performing fault tree analysis on hazardous chemical accidents that have occurred at home and abroad, classifying hazardous chemical types as the first-level classification, counting the number of casualties in accidents related to the same type of hazardous chemicals and the number of casualties in accidents in each evolution sequence, the hazard coefficient H of different hazardous chemical accident risk evolution sequences is obtained, where the value of the current accident state b is obtained according to the structured text information;

[0117] The calculation formula for the hazard coefficient H of the hazardous chemical accident risk evolution sequence is:

[0118]

[0119] In the formula, H(a, b, c) is the hazard coefficient of hazardous chemical a occurring c-type secondary accidents in the current accident state; D(a, b, c) is the number of deaths of hazardous chemical a occurring c-type secondary accidents in the current accident state; I(a, b, c) is the number of injuries of hazardous chemical a occurring c-type secondary accidents in the current accident state;

[0120] Based on the hazard coefficient H of the hazardous chemical accident risk evolution sequence, the severity of the secondary accident of the hazardous chemical in the current accident state is calculated as:

[0121]

[0122] In the formula, S a is the severity of the secondary accident of hazardous chemical a in the current accident state.

[0123] Preferably, the severity levels of the secondary accidents are set from low to high as Level 1, Level 2, Level 3, Level 4, Level 5, Level 6, and Level 7. The value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is determined according to the severity S of the secondary accidents occurring in the surrounding area of the hazardous chemical accident. The value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is set to 1-7;

[0124] Among them, if the severity of the secondary accident of the hazardous chemical under the current accident state does not exceed 10 -3 , it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 1;

[0125] If the severity value range of the secondary accident of the hazardous chemical under the current accident state is (10 -3 , 10 -2 , it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 2;

[0126] If the severity value range of the secondary accident of the hazardous chemical under the current accident state is (10 -2 , 10 -1 , it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 3;

[0127] If the severity value range of the secondary accident of the hazardous chemical under the current accident state is (10 -1 , 1], it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 4;

[0128] If the severity value range of the secondary accident of the hazardous chemical under the current accident state is (1, 10], it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 5;

[0129] If the severity value range of the secondary accident of the hazardous chemical under the current accident state is (10, 100], it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 6;

[0130] If the severity of the secondary accident of the hazardous chemical under the current accident state is greater than 100, it is determined that the value of the severity level N of the secondary accidents occurring in the surrounding area of the hazardous chemical accident is 7.

[0131] Preferably, in the step 3.3, the risk value generated by the single risk source is:

[0132] R = L×N (7)

[0133] In the formula, R is the risk value generated by the single risk source.

[0134] Preferably, in step 3.4, the mapping relationship between the secondary accident risk score K and the risk value R of the secondary accident of hazardous chemicals is as follows:

[0135]

[0136] In the formula, K is the secondary accident risk score;

[0137] Determine the risk level of the secondary accident of dangerous goods according to the secondary accident risk score K;

[0138] When the value range of the secondary accident risk score K is (75, 100], determine that the risk level of the secondary accident is a red risk;

[0139] When the value range of the secondary accident risk score K is (50, 75], determine that the risk level of the secondary accident is an orange risk;

[0140] When the value range of the secondary accident risk score K is (20, 50], determine that the risk level of the secondary accident is a yellow risk;

[0141] When the value range of the secondary accident risk score K is [0, 20], determine that the risk level of the secondary accident is a blue risk.

[0142] Preferably, the secondary accident risk score K is corrected with time as a variable. Combining the statistics of the historical accident evolution time, the calculation formula of the secondary accident risk score K is optimized as:

[0143]

[0144] In the formula, t is time, and K(t) is the secondary accident risk score t minutes after the incident occurs.

[0145] The beneficial effects of the present invention are as follows:

[0146] The present invention proposes a multi - related risk real - time evaluation terminal based on hazardous chemical accident information, which solves the deficiency in the prior art of lacking a rapid evaluation system for the risk level of the area around the accident and the potential consequences of the accident in a timely manner after a hazardous chemical accident occurs. It is beneficial to assist relevant departments and fire rescue teams in judging hazardous chemical accidents and scientifically setting up hazardous chemical accident disposal plans.

[0147] The present invention also proposes a multi - related risk real - time evaluation method based on hazardous chemical accident information. By using the structured information of hazardous chemical accidents searched on the Internet, combining key accident elements such as location, category, substance type, and the impacts caused, through the accident risk grading evaluation matrix and the analysis of the hazard of the accident area, it realizes the risk evaluation and early warning of the hazardous chemical accident area, helps key populations master the dynamic changes of the risk levels of hazardous chemical accidents in the area, effectively reduces the secondary hazards caused by hazardous chemical accidents. At the same time, it also provides reference and data support for regional major safety decision - making, safety planning, and the improvement of safety level status, and provides a new tool for the research on hazardous chemical accidents and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0148] Figure 1 It is a schematic structural diagram of the multi - related risk real - time evaluation terminal based on hazardous chemical accident information of the present invention.

[0149] Figure 2 It is a schematic diagram of the impact evaluation of hazardous chemical accidents in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0150] The present invention will be further described in detail below in conjunction with the drawings and the specific embodiments:

[0151] Embodiment 1

[0152] The present invention proposes a multi - related risk real - time evaluation terminal based on hazardous chemical accident information, as Figure 1 shown, which includes a collector, a numbering device, a memory, a controller, an arithmetic unit, and an output end.

[0153] An automatic search engine is set in the collector, which is used to retrieve web pages related to hazardous chemical accidents in the Internet and obtain web page information. In this embodiment, the web page information is mainly in HTML structure, which is a hypertext tag of logical format.

[0154] The input end of the numbering device is connected to the collector, and the output end is connected to the memory. A Bloom filter is preset inside, which is used to filter duplicate web pages in the collector, assign numbers to each screened web page, and send the numbers and web addresses of the retrieved web pages to the memory for storage.

[0155] The memory is respectively connected to the controller, the arithmetic unit, and the output end, and is used to receive and store the numbers and web addresses of the web pages transmitted by the collector, transfer the stored data to the controller and the arithmetic unit, and store the operation results of the controller and the arithmetic unit;

[0156] The controller is connected to the arithmetic unit, and is used to control the arithmetic unit to process the hazardous chemical accident information collected by the collector through retrieval.

[0157] A risk assessment index system for hazardous chemical accident areas is preset in the arithmetic unit, which is used to perform fuzzy matching on the hazardous chemical accident information collected by the collector through retrieval. By using a directional crawler to extract and store the casualty information, occurrence area and accident type information of hazardous chemical accidents, combining with public opinion heat analysis information, fuzzy matching is used to extract structured text data, and real-time analysis is carried out based on a semantic analysis tool of a neural network to obtain the risk value of the accident in real time and classify it based on a matrix.

[0158] In this embodiment, the hazardous chemical accident information in the arithmetic unit is processed using an extended TF indexing method TFE (Term Frequency Extended). A word segmentation dictionary is also preset in the arithmetic unit based on the subject field of hazardous chemical accidents, which is used to screen out non-topic words in each tag of the web page information.

[0159] An AC automaton multi-pattern string matching algorithm, a text relation extraction model, and a Sunday algorithm string matching algorithm are preset in the arithmetic unit. Among them, the AC automaton multi-pattern string matching algorithm is used to retain the pure text content under the key tags to be processed after screening and automatically preprocess to remove words with no clear meaning in the pure text content; the text relation extraction model is constructed based on a multi-channel convolutional neural network and is used to analyze the syntactic features and semantic features of the text to achieve end-to-end relation extraction; the Sunday algorithm string matching algorithm is used to perform fuzzy matching between the prefabricated structured information of hazardous chemical accidents and the collected accident structured text to determine the main attribute tags including the accident occurrence time, accident occurrence location, accident type, and casualty situation.

[0160] A risk assessment index system for hazardous chemical accident areas is preset in the output terminal, which is used to perform a risk assessment on hazardous chemical accidents according to the accident occurrence time, accident occurrence location, accident type, and casualty situation extracted by the arithmetic unit, determine and output the risk level of hazardous chemical accidents, and timely remind relevant staff.

[0161] Embodiment 2

[0162] The present invention also proposes a multi-correlation risk real-time assessment method based on hazardous chemical accident information, which uses the multi-correlation risk real-time assessment terminal based on hazardous chemical accident information as described in Embodiment 1, and specifically includes the following steps:

[0163] Step 1, using the multi-correlation risk real-time assessment terminal based on hazardous chemical accident information to obtain the unstructured text information of hazardous chemical accidents in real time, specifically including the following steps:

[0164] Step 1.1, turn on the multi - associated risk real - time evaluation terminal based on hazardous chemical accident information. Use the collector in the multi - associated risk real - time evaluation terminal based on hazardous chemical accident information to retrieve web pages related to news of hazardous chemical accidents on the Internet, obtain web page information, and send the obtained web page information to the numbering device;

[0165] Step 1.2, based on the breadth - first algorithm and persistent remote dictionary service, use the Bloom filter preset in the numbering device to de - duplicate the web page information collected by the collector. After de - duplication, use the numbering device to assign numbers to each web page so that each web page has a unique number, and send the numbers and URLs of all web pages to the memory for storage;

[0166] Step 1.3, use the controller to control the arithmetic unit to classify the tags in the web page information according to the web page information corresponding to each web page number, combined with the structural characteristics of the HTML file, using the extended TF indexing method TFE. Tags with similar importance factors are classified into the same category, and non - topic words within the same category of tags are screened out using the word segmentation dictionary to obtain the screened tags;

[0167] Step 1.4, use the AC automaton multi - pattern string matching algorithm preset in the arithmetic unit to delete the text content unrelated to hazardous chemical accidents in the tags at one time, only retain the pure text content related to hazardous chemical accidents, and use the arithmetic unit to pre - process the obtained pure text content to remove the words with no clear meaning in the pure text content, obtaining the pure text file processed by the AC automaton multi - pattern string matching algorithm;

[0168] Step 1.5, input the pure text file processed by the AC automaton multi - pattern string matching algorithm into the text relationship extraction model preset in the arithmetic unit. The text relationship extraction model is constructed based on a multi - channel convolutional neural network. Use the shortest dependency path algorithm of the multi - channel convolutional neural network (CNN) to model sentences, integrate syntactic analysis and deep learning, extract text relationships, parse the syntactic and semantic features of the text, obtain the extraction result of the text relationship extraction model, and output the processed accident structured text.

[0169] Step 1.6, use the Sunday algorithm string matching algorithm to perform fuzzy matching between the pre - fabricated structured information of hazardous chemical accidents and the processed accident structured text, obtain the main attribute tags of the accident structured text, and splice and arrange the accident structured text in the preset information order to obtain the unstructured text information of hazardous chemical accidents.

[0170] In this embodiment, the text relation extraction model is set as the MCNN_Att_RL model based on the multi-channel mechanism, which includes a vector mapping layer, an attention layer, a convolutional layer, a segmented average pooling layer, a max pooling layer, and a fully connected layer.

[0171] When the word vector is input into the MCNN_Att_RL model based on the multi-channel mechanism, the word vector will be respectively input and mapped into a two-channel convolutional neural network for processing. The two-channel convolutional neural network includes a first channel and a second channel. Among them, an attention mechanism is added to the second channel to obtain an entity-oriented vector representation. After obtaining multiple channel information through the two-channel convolutional neural network, it will be divided into multiple segments of information according to the entity position and integrated into the structural information of the sentence through the average pooling layer. After that, the final representation of the sentence is learned through the max pooling layer and output to obtain the extraction result.

[0172] The two-channel convolutional neural network uses the first channel and the second channel to fuse two types of word vectors to obtain different semantic features of words. Among them, pre-trained Chinese word vectors are used in the first channel, and Chinese word vectors specific to the task are used in the second channel.

[0173] The attention layer automatically captures the correlation between words and sentences by introducing an attention mechanism. An attention matrix is set in the attention layer. By using the attention matrix to calculate the correlation between each word in the input text content and the hazardous chemical accident, a correlation matrix is calculated to obtain a vector for the entity pair, and a sentence vector integrated with semantic information is obtained.

[0174] Filters are set in the convolutional layer to learn different n-gram features. When the sentence vector integrated with semantic information is input into the convolutional layer, the filters in the convolutional layer perform convolutional operations on the sentence vector integrated with semantic information to obtain local features of the sentence. By performing convolutional operations on the sentence vector integrated with semantic information multiple times, high-order sentence features are obtained, and the processed feature vector is obtained and input into the average pooling layer.

[0175] The average pooling layer is used to obtain the structural information of the sentence. After dividing the input feature vector into multiple segments, determining the start position and end position of each segment of the feature vector, each segment of the feature vector is respectively input into the average pooling layer for processing and then fused to obtain a feature vector integrated with the sentence structural information, and the feature vector integrated with the sentence structural information is input into the max pooling layer.

[0176] The max pooling layer is used to perform a maximization operation on the feature vector integrated with the sentence structural information to obtain the final output feature information, and transmit it to the fully connected layer for global adjustment and output, obtaining the extraction result of the word vector through the MCNN_Att_RL model based on the multi-channel mechanism, and outputting the processed accident structured text.

[0177] In this embodiment, the MCNN_Att_RL model based on the multi-channel mechanism is trained using the Adadelta optimization algorithm. A Softmax classification function and a loss function are set in the MCNN_Att_RL model based on the multi-channel mechanism. Among them, the Softmax classification function is used to calculate the relationship probability, and the correlation between the sentence vector and the relationship category is used as the score; the loss function uses a margin-based ranking loss function.

[0178] Step 2: Construct a risk assessment index system for the hazardous chemical accident area, and use the constructed risk assessment index system for the hazardous chemical accident area to determine the risk level of the hazardous chemical accident, which specifically includes the following steps:

[0179] Step 2.1: Using the risk degree analysis method, combined with the regulations on individual risk criteria and social risk criteria in "GB 36894-2018 Risk Criteria for Hazardous Chemical Production Devices and Storage Facilities", according to the personnel injuries, property losses, social impacts and the severity of the consequences of hazardous chemical accidents in the hazardous chemical accident area, determine the risk level of the hazardous chemical accident based on the safety risk matrix.

[0180] In this embodiment, the risk levels of hazardous chemical accidents are divided into four levels, namely major risk, relatively large risk, general risk, and low risk.

[0181] Step 2.2: According to the possibility and severity of the occurrence of personnel health impacts, property loss impacts, and social impacts that may be caused by hazardous chemical accidents, divide the severity levels of hazardous chemical accidents from the dimensions of personnel health, accident category and occurrence location, and the dimension of public opinion discussion heat. Determine the severity level of the hazardous chemical accident under each dimension. The severity levels of the hazardous chemical accident under each dimension all include seven levels, namely Level A, Level B, Level C, Level D, Level E, Level F, and Level G;

[0182] Step 2.3: Determine the hazard score of the hazardous goods accident according to the levels of each dimension of the hazardous goods accident, and combine the mapping relationship between the hazard score and the risk value to determine the risk level of the hazardous goods accident.

[0183] In this embodiment, according to the possibility and severity of the occurrence of personnel health impacts, property loss impacts, and social impacts that may be caused by hazardous chemical accidents, divide the severity levels of hazardous chemical accidents from the dimensions of personnel health, accident category and occurrence location, and the dimension of public opinion discussion heat, as Figure 2 shown. The specific classification criteria are as follows:

[0184] Based on the dimension of personnel health, determine the severity level X1 of chemical accident according to the impact of chemical accident on personnel health and safety. The value of the severity level X1 of chemical accident is determined according to the severity level, and the judgment criteria for the severity level X1 of chemical accident are as follows:

[0185] Classify the chemical accident that causes slight impact on health / safety as level A; classify the chemical accident that causes moderate impact on health / safety as level B; classify the chemical accident that causes relatively large impact on health / safety as level C; classify the chemical accident that causes relatively large safety accident resulting in death or serious injury of personnel as level D; classify the chemical accident that causes serious safety accident as level E; classify the chemical accident that causes extremely major safety accident as level F; classify the chemical accident that causes particularly major catastrophic safety accident with a large number of casualties inside or outside the factory boundary as level G;

[0186] The judgment criteria for the chemical accident that causes slight impact on health / safety are as follows:

[0187] When the chemical accident occurs, the injured need first aid or medical treatment, but do not need to be hospitalized, and there will be no loss of working days due to the injury of the chemical accident; the injured feel unwell due to short-term exposure exceeding the standard, but it will not cause long-term health effects, and generally there are no casualties or no casualties are found.

[0188] The judgment criteria for the chemical accident that causes moderate impact on health / safety are as follows: the occurrence of the chemical accident causes 1 to 2 people to be slightly injured.

[0189] The judgment criteria for the chemical accident that causes relatively large impact on health / safety are as follows: the occurrence of the chemical accident causes more than 3 people to be slightly injured or 1 to 2 people to be seriously injured, and when the chemical accident occurs, the personnel are exposed to exceed the standard and cause serious occupational diseases or long-term affect the health of personnel.

[0190] The judgment criteria for the chemical accident that causes relatively large safety accident resulting in death or serious injury of personnel are as follows: the occurrence of the chemical accident causes 1 to 2 people to die or 3 to 9 people to be seriously injured inside the boundary; 1 to 2 people are seriously injured outside the boundary.

[0191] The judgment criteria for the chemical accident that causes serious safety accident are as follows: the occurrence of the chemical accident causes 3 to 9 people to die or 10 to 50 people to be seriously injured inside the boundary; 1 to 2 people die or 3 to 9 people are seriously injured outside the boundary.

[0192] The judgment criteria for the chemical accident that causes extremely major safety accident are as follows: the occurrence of the chemical accident causes 10 to 30 people to die or 50 to 100 people to be seriously injured inside the boundary; 3 to 9 people die or 10 to 50 people are seriously injured outside the boundary.

[0193] The criteria for determining a hazardous chemical accident that causes a particularly major catastrophic safety accident resulting in a large number of casualties within or outside the factory boundary are as follows: The occurrence of the hazardous chemical accident leads to more than 30 deaths or more than 100 serious injuries within the boundary; more than 10 deaths or more than 50 serious injuries among the four parties outside the boundary.

[0194] Based on the dimensions of accident category and occurrence location, determine the severity level X2 of the hazardous chemical accident according to the impact of the hazardous chemical accident on property damage. The value of the severity level X2 of the hazardous chemical accident is determined according to the severity level. The criteria for determining the severity level X2 of the hazardous chemical accident are as follows:

[0195] If the occurrence of the hazardous chemical accident causes damage to equipment or an unplanned shutdown, the severity level of the hazardous chemical accident shall be classified as level A;

[0196] If the hazardous chemical accident occurs in an open area resulting in a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident shall be classified as level B;

[0197] If the occurrence of the hazardous chemical accident causes a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident shall be classified as level C;

[0198] If the occurrence of the hazardous chemical accident causes the shutdown of 3 or more sets of devices and local controllable fires, explosions, and toxicant diffusions occur, the severity level of the hazardous chemical accident shall be classified as level D;

[0199] If the hazardous chemical accident is an uncontrollable leakage near a high accident consequence area, the severity level of the hazardous chemical accident shall be classified as level E;

[0200] If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion in a medium accident consequence area, the severity level of the hazardous chemical accident shall be classified as level F;

[0201] If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion in a high accident consequence area, the severity level of the hazardous chemical accident shall be classified as level G.

[0202] Based on the dimension of public opinion discussion heat, determine the severity level X3 of the hazardous chemical accident according to the social impact of the hazardous chemical accident. The value of the severity level X3 of the hazardous chemical accident is determined according to the severity level. The criteria for determining the severity level X3 of the hazardous chemical accident are as follows:

[0203] If the occurrence of the hazardous chemical accident causes short-term dissatisfaction, complaints, or complaints from a small number of residents in the surrounding community, the retrieved information quantity is extremely small, and there is no official news channel report, the severity level of the hazardous chemical accident shall be classified as level A;

[0204] If the occurrence of a hazardous chemical accident is reported by local media in the short term, and it interferes with the daily operation of local public facilities and there are short local fire reports, the severity level of the hazardous chemical accident is classified as Level B;

[0205] If the occurrence of a hazardous chemical accident is reported by local media in the long term, and it has an adverse social impact locally, seriously interfering with the daily operation of local public facilities and there are local fire reports, the severity level of the hazardous chemical accident is classified as Level C;

[0206] If the occurrence of a hazardous chemical accident has caused local relevant regulatory departments to take mandatory measures, or is reported negatively by domestic or international media in the short term, and there are local fire reports in text and pictures, the severity level of the hazardous chemical accident is classified as Level D;

[0207] If the occurrence of a hazardous chemical accident has attracted long-term attention from domestic or international media, has caused adverse social impacts within the provincial scope, seriously interfered with the daily operation of provincial public facilities, caused relevant provincial departments to take mandatory measures, or led to the revocation of production, operation and sales licenses in the local market, and there are reports from provincial departments, municipal emergency management, in text, pictures and videos, the severity level of the hazardous chemical accident is classified as Level E;

[0208] If the occurrence of a hazardous chemical accident has caused relevant departments to take mandatory measures, has caused serious social impacts nationwide, attracted key follow-up reports or series reports from domestic and international media, and there are reports from ministries and commissions, provincial, municipal emergency management, in text, pictures and videos, the severity level of the hazardous chemical accident is classified as Level F;

[0209] If the occurrence of a hazardous chemical accident has led to the revocation of production, sales or operation licenses in the main domestic and international markets, caused strong indignation or condemnation from the public or investors in the main domestic and international markets, and there are reports and announcements from mainstream media, the severity level of the hazardous chemical accident is classified as Level G.

[0210] Among the severity levels of hazardous chemical accidents in each dimension, the score corresponding to Level A is 1 point, the score corresponding to Level B is 2 points, the score corresponding to Level C is 3 points, the score corresponding to Level D is 4 points, the score corresponding to Level E is 5 points, the score corresponding to Level F is 6 points, and the score corresponding to Level G is 7 points;

[0211] Multiply the scores determined by the personnel health dimension, the accident category and occurrence location dimension, and the public opinion discussion heat dimension to obtain the risk score of the hazardous chemical accident. The calculation formula for the risk score X is:

[0212] X = X1X2X3 (1)

[0213] Wherein, X is the risk score, X1 is the value of the severity level of the hazardous chemical accident, X2 is the value of the severity level of the hazardous chemical accident, and X3 is the value of the severity level of the hazardous chemical accident;

[0214] The mapping relationship between the risk score and the risk value is as follows:

[0215]

[0216] Wherein, W is the risk value.

[0217] Determine the risk level of the hazardous material accident according to the risk value. When the value range of the risk value is (75, 100], determine that the risk level of the hazardous material accident is a red risk; when the value range of the risk value is (50, 75], determine that the risk level of the hazardous material accident is an orange risk; when the value range of the risk value is (20, 50], determine that the risk level of the hazardous material accident is a yellow risk; when the value range of the risk value is [0, 20], determine that the risk level of the hazardous material accident is a blue risk.

[0218] Step 3: Based on the unstructured text information of the hazardous chemical accident, combine historical data to determine the possibility level of secondary accidents and the severity level of accidents in the surrounding area of the hazardous chemical accident, and use the safety risk matrix to conduct real-time evaluation and consequence rating of the risk in the surrounding area of the hazardous chemical accident, which specifically includes the following steps:

[0219] Step 3.1: Based on the structured text information of the hazardous chemical accident, combine the risk transfer laws of different types of accidents to calculate the risk evolution probability P of the hazardous chemical accident, and determine the possibility level L of secondary accidents in the surrounding area of the accident.

[0220] The initial accident types include leakage, fire, and explosion, which are obtained through the fault tree analysis of hazardous chemical accidents that have occurred at home and abroad. The accident evolution sequences mainly include from leakage to fire, from fire to explosion, from leakage to fire and then to explosion, from leakage to diffusion of flammable gas and then to explosion, etc. Since the quantitative judgment of the accident evolution sequence often requires details of parameters such as the environment, equipment, process, and materials, and the evaluation calculation method is complex, first, such data is difficult to directly obtain through network resources, and second, it is impossible to accurately match the calculation model and calculate the results in real time. Therefore, the accident evolution probability data can be obtained by using statistical methods.

[0221] Through the fault tree analysis of hazardous chemical accidents that have occurred at home and abroad in the past 20 years, taking the types of hazardous chemicals as the first-level classification, count the number of accidents of the same type of hazardous chemicals and the number of accidents in each evolution sequence, and establish a statistical matrix X(a, b, c) of the number of accidents in different evolution sequences;

[0222] In the statistical matrix X(a, b, c) of the accident quantities of different evolution sequences, the row index represents the type of substance, the column index represents the current accident type, and the depth index represents the secondary accident type; the value range of the row index is set to 0 to x, where x is the total number of hazardous chemical accident substances counted; the value of the column index is set to 0 to 2, where 0 represents the initial accident as leakage, 1 represents the initial accident as fire, and 2 represents the initial accident as explosion; the value of the depth index is 0 to 2, 0 represents the secondary accident as leakage, 1 represents the secondary accident as fire, and 2 represents the secondary accident as explosion; obtain the risk evolution probability matrix of different hazardous chemical accidents, where the value of the current accident state b is determined by the structured text information.

[0223] In this embodiment, taking the accident evolution sequence of a fire occurring after the leakage of liquefied petroleum gas as an example, assuming that liquefied petroleum gas is the 1st hazardous chemical, the calculation formula for the risk evolution probability P of the hazardous chemical accident is:

[0224]

[0225] In the formula, P(1, 0, 1) is the evolution probability of a fire accident occurring in the leakage state of liquefied petroleum gas; X(1, 0, 1) is the accident quantity of a fire accident occurring in the leakage state of liquefied petroleum gas; is the total sum of the accident quantities of liquefied petroleum gas.

[0226] Based on the evolution probability of a secondary accident occurring in the leakage state of liquefied petroleum gas, the probability of a secondary accident occurring in the leakage state of liquefied petroleum gas is further calculated as:

[0227]

[0228] In the formula, P1 is the probability of a secondary accident occurring in the leakage state of liquefied petroleum gas.

[0229] The likelihood levels of the occurrence of the secondary accident are set from low to high as level 1, level 2, level 3, level 4, level 5, level 6, and level 7; the likelihood level L of the occurrence of the secondary accident in the surrounding area of the accident is determined according to the risk evolution probability P of the hazardous chemical accident, and the value of the likelihood level L of the occurrence of the secondary accident in the surrounding area of the accident takes values from 1 to 7 corresponding to levels 1 to 7.

[0230] Among them, if the probability of a secondary accident occurring in the current accident state of the hazardous chemical does not exceed 10 -6 , then it is determined that the likelihood level of the occurrence of the secondary accident is level 1, and the value of the likelihood level L of the occurrence of the secondary accident in the surrounding area of the accident is 1; if the probability of a secondary accident occurring in the current accident state of the hazardous chemical takes a value range of (10 -6 , 10 -5, then it is determined that the possibility level of a secondary accident is level 2, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 2; if the probability range of a secondary accident occurring for the hazardous chemical in the current accident state is (10 -5 , 10 -4 , then it is determined that the possibility level of a secondary accident is level 3, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 3; if the probability range of a secondary accident occurring for the hazardous chemical in the current accident state is (10 -4 , 10 -3 , then it is determined that the possibility level of a secondary accident is level 4, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 4; if the probability range of a secondary accident occurring for the hazardous chemical in the current accident state is (10 -3 , 10 -2 , then it is determined that the possibility level of a secondary accident is level 5, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 5; if the probability range of a secondary accident occurring for the hazardous chemical in the current accident state is (10 -2 , 10 -1 , then it is determined that the possibility level of a secondary accident is level 6, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 6; if the probability range of a secondary accident occurring for the hazardous chemical in the current accident state is (10 -1 , 1], then it is determined that the possibility level of a secondary accident is level 7, and the value of the possibility level L of a secondary accident occurring in the area around the accident is 7.

[0231] In this embodiment, if a more accurate accident risk evolution probability is required, the accident characteristics of the same type of hazardous chemical can be subdivided, and the accident time, location, process, storage / transportation method, etc. can be used as secondary classification indicators, but it should be ensured that the secondary classification indicators can be obtained from the accident structured text information.

[0232] Step 3.2, calculate the severity S of a secondary accident occurring in the area around the hazardous chemical accident, and determine the severity level N of a secondary accident occurring in the area around the hazardous chemical accident.

[0233] After the secondary accident occurs, its severity level is related to the scale of the initial accident and the type of the secondary accident. The scale of the initial accident can be quantitatively characterized by using the risk value of the initial accident, and the influence of the secondary accident type on the harm degree can be obtained by using statistical methods.

[0234] Perform a fault tree analysis on domestic and international hazardous chemical accidents that have occurred in the past 20 years. Take the types of hazardous chemicals as the first-level classification, and count the number of casualties in accidents related to the same type of hazardous chemicals and the number of casualties in accidents in each evolution sequence to obtain the hazard coefficient H of different accident risk evolution sequences of hazardous chemicals. Among them, the value of the current accident state b is obtained according to the structured text information.

[0235] In this embodiment, taking the accident evolution sequence of a fire occurring after the leakage of liquefied petroleum gas as an example, assuming that liquefied petroleum gas is the No. 1 hazardous chemical, the calculation formula for the data of the hazard coefficient of the accident evolution sequence is:

[0236]

[0237] In the formula, H(1,0,1) is the hazard coefficient of a fire occurring in the leakage state of liquefied petroleum gas; D(1,0,1) is the number of deaths in a fire occurring in the leakage state of liquefied petroleum gas; I(1,0,1) is the number of injured in a fire occurring in the leakage state of liquefied petroleum gas.

[0238] Based on the hazard coefficient of a fire occurring in the leakage state of liquefied petroleum gas, further calculate the severity of the secondary accident of liquefied petroleum gas leakage as:

[0239]

[0240] In the formula, S a is the severity of the secondary accident of liquefied petroleum gas leakage.

[0241] In this embodiment, the severity levels of the occurrence of the secondary accident are set from low to high as level 1, level 2, level 3, level 4, level 5, level 6, and level 7. The corresponding values for levels 1 to 7 are 1 to 7. The value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is determined according to the severity of the secondary accident;

[0242] In this embodiment, if the severity of the secondary accident of the hazardous chemical in the current accident state does not exceed 10 -3 , then determine that the severity level of the secondary accident is level 1, and the value of N is 1; if the severity range of the secondary accident of the hazardous chemical in the current accident state is (10 -3 , 10 -2 , then determine that the severity level of the secondary accident is level 2, and the value of N is 2; if the severity range of the secondary accident of the hazardous chemical in the current accident state is (10 -2 , 10 -1 , then determine that the severity level of the secondary accident is level 3, and the value of N is 3; if the severity range of the secondary accident of the hazardous chemical in the current accident state is (10 -1,1], the severity level of the secondary accident is determined to be level 4, and the value of N is 4; if the severity range of the secondary accident of the hazardous chemical in the current accident state is (1, 10], the severity level of the secondary accident is determined to be level 5, and the value of N is 5; if the severity range of the secondary accident of the hazardous chemical in the current accident state is (10, 100], the severity level of the secondary accident is determined to be level 6, and the value of N is 6; if the severity of the secondary accident of the hazardous chemical in the current accident state is greater than 100, the severity level of the secondary accident is determined to be level 7, and the value of N is 7.

[0243] Step 3.3: Determine the risk value R of the secondary accident of the hazardous chemical according to the likelihood level of the secondary accident occurring in the surrounding area of the hazardous chemical accident and the severity level of the secondary accident occurring in the surrounding area of the hazardous chemical accident.

[0244] The regional risk value R of the surrounding area of the hazardous chemical accident is obtained by multiplying the likelihood level L of the secondary accident occurring in the surrounding area of the hazardous chemical accident by the severity level N of the secondary accident occurring in the surrounding area of the hazardous chemical accident.

[0245] Specifically, calculate the likelihood level L of the secondary accident occurring in the surrounding area of the hazardous chemical accident in the region and the severity S of the secondary accident occurring in the surrounding area of the hazardous chemical accident, calculate the risk value R of the secondary accident of the hazardous chemical, determine the inherent risk level of the region, the combination of the likelihood of the accident occurring and the consequences of the event. The likelihood level L of the secondary accident occurring in the surrounding area of the hazardous chemical accident is the likelihood of the accident occurring; the severity S of the secondary accident occurring in the surrounding area of the hazardous chemical accident is the severity of the accident consequences; the greater the risk value R of the secondary accident of the hazardous chemical, the greater the risk and danger of the region.

[0246] For a single risk source, the risk value it generates is:

[0247] R = L × N (7)

[0248] In the formula, R is the risk value generated by a single risk source.

[0249] Step 3.4: Determine the secondary accident risk score K according to the risk value R of the secondary accident of the hazardous chemical, and use the safety risk matrix to evaluate the risk of the secondary accident of the hazardous chemical in real time to determine the risk level of the secondary accident of the hazardous chemical.

[0250] In this embodiment, the mapping relationship between the secondary accident risk score K and the risk value R of the secondary accident of the hazardous chemical is:

[0251]

[0252] In the formula, K is the secondary accident risk score.

[0253] The risk level of secondary accidents of dangerous goods is determined according to the secondary accident risk score K; when the value range of the secondary accident risk score K is (75,100], the risk level of the secondary accident is determined to be red risk; when the value range of the secondary accident risk score K is (50,75], the risk level of the secondary accident is determined to be orange risk; when the value range of the secondary accident risk score K is (20,50], the risk level of the secondary accident is determined to be yellow risk; when the value range of the secondary accident risk score K is [0,20], the risk level of the secondary accident is determined to be blue risk.

[0254] Since the risk of secondary accidents is not static, this risk will gradually decrease as emergency rescue measures for various accidents take effect. Although it is impossible to accurately obtain and evaluate the effectiveness of emergency rescue measures in preventing the risk of secondary accidents through network data, for controllable accidents, the risk of secondary accidents will gradually decrease over time.

[0255] Therefore, the secondary accident risk score K is modified with time as a variable, and the calculation formula of the secondary accident risk score K is optimized as follows based on the statistics of the evolution time of historical accidents:

[0256]

[0257] Where t is time, and K(t) is the secondary accident risk score t minutes after the incident.

[0258] Step 3.5: Provide reminders and warnings on major hazardous sources around the accident area based on the risk classification of hazardous chemical accidents and the risk level of secondary accidents caused by hazardous chemicals.

[0259] The physical effects of fire heat radiation, explosion shock waves, explosion fragments, etc. generated by the initial accident and secondary accidents may further cause other hazardous sources around the accident to be affected, forming a domino effect, which may cause the equipment of other hazardous sources to be damaged and fail, causing leakage, fire, explosion and other consequences, causing the consequences of the accident to expand.

[0260] In this embodiment, the geographic information coordinates are determined by the accident location in the accident structured information, and the distribution of major hazardous sources of hazardous chemicals within a 1km radius of the accident point is matched and displayed, including the location, level, type of hazardous chemicals, and designed storage / production information of major hazardous sources. The existing domestic data information on major hazardous sources of hazardous chemicals can be obtained through the National Hazardous Chemicals Registration Information Management System.

[0261] For hazardous sources that have not yet been registered / do not meet the classification requirements, their hazard level can also be calculated according to the classification index calculation method of GB 18218-2018 "Identification of Major Hazard Sources of Hazardous Chemicals".

[0262] Step 4: Use the output end of the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to push the risk level of the hazardous chemical accident and the risk level of secondary accidents of hazardous chemicals to the emergency management personnel and enterprise safety responsible persons preset at each level in a hierarchical manner, so as to remind the emergency management personnel and enterprise safety responsible persons at each level.

[0263] Embodiment 3

[0264] Adopt the multi - related risk real - time evaluation terminal based on hazardous chemical accident information proposed in Embodiment 1 and the multi - related risk real - time evaluation method based on hazardous chemical accident information proposed in Embodiment 2 to process the actual hazardous chemical accident data. The specific steps are as follows:

[0265] Step 1: Use the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to obtain the unstructured text information of hazardous chemical accidents in real time. The specific steps are as follows:

[0266] Step 1.1: Turn on the multi - related risk real - time evaluation terminal based on hazardous chemical accident information. Use the collector in the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to retrieve hazardous chemical accidents from seed websites such as Sina Weibo, Douyin, Kuaishou, Jinri Toutiao, and The Paper. It is retrieved that a user on Sina Weibo posted "At about 14:48 on March 21st, Tianjiayi Chemical Plant in Chenjiagang Chemical Industrial Park, Xiangshui County, Yancheng City, Jiangsu Province exploded; at 16:00 on March 24th, the third press conference of the '3·21' explosion accident in Xiangshui was held, and this press conference will introduce the relevant situation up to now". Obtain the web page information and send the obtained web page information to the numbering device.

[0267] Step 1.2: Use the breadth - first algorithm and persistent remote dictionary service for this web page. Use the Bloom filter preset in the numbering device to de - duplicate the web page information collected by the collector. After de - duplication processing, use the numbering device to assign numbers to each web page, so that each web page has a unique number id, and send the number id and website address of the web page to the memory for storage.

[0268] Step 1.3: Use the controller to control the arithmetic unit to classify the tags in the web page information according to the web page information corresponding to each web page number, combined with the structural characteristics of the HTML file, using the extended TF indexing method TFE. Tags with similar importance factors are classified into the same category, and non - topic words in the same category of tags are screened out using the word - segmentation dictionary to obtain the screened tags. Thus, the dimension of TFE is reduced, and the accuracy of classification is improved.

[0269] Step 1.4: Using the AC automaton multi-pattern string matching algorithm preset in the arithmetic unit, delete the text content in the label that has nothing to do with hazardous chemical accidents at one time, and only retain the pure text content related to hazardous chemical accidents. Then, use the arithmetic unit to preprocess the obtained pure text content to remove words with no clear meaning (such as modal particles, conjunctions, prepositions, and adverbs, etc.), and obtain a pure text file processed by the AC automaton multi-pattern string matching algorithm.

[0270] Step 1.5: Input the pure text file processed by the AC automaton multi-pattern string matching algorithm into the text relation extraction model preset in the arithmetic unit. The text relation extraction model is constructed based on a multi-channel convolutional neural network. Using the shortest dependency path algorithm of the multi-channel convolutional neural network (CNN) to model sentences, it integrates syntactic analysis and deep learning, extracts text relations, parses the syntactic features and semantic features of the text, obtains the extraction result of the text relation extraction model, and outputs the processed accident structured text.

[0271] Step 1.6: Using the Sunday algorithm string matching algorithm, perform fuzzy matching between the prefabricated structured information of hazardous chemical accidents and the processed accident structured text, obtain the main attribute labels of the accident structured text, and splice and arrange the accident structured text in the preset information order to obtain the unstructured text information of hazardous chemical accidents.

[0272] In this embodiment, the finally obtained unstructured text information of hazardous chemical accidents is "At 3 o'clock on November 22, 2013, at the intersection of Qinhuangdao Road and Zhaitangdao Road in Huangdao District, Qingdao City, Shandong Province, the oil pipeline of the Weifang Branch of Sinopec Oil Transportation and Storage Company burst. At 10:30 am on the same day, a deflagration occurred at the intersection of Yanhe Road and Zhaitangdao Road in Huangdao District, and at the same time, a deflagration occurred on the sea surface polluted by oil at the estuary."

[0273] Step 2: Construct a risk assessment index system for hazardous chemical accident areas, and use the constructed risk assessment index system for hazardous chemical accident areas to determine the risk level of hazardous chemical accidents. The specific steps are as follows:

[0274] Step 2.1: Using the risk degree analysis method, combined with the regulations on individual risk benchmarks and social risk benchmarks in "GB 36894-2018 Risk Benchmarks for Hazardous Chemical Production Devices and Storage Facilities", according to the personnel injuries, property losses, social impacts, and the severity of the consequences of hazardous chemical accidents in the hazardous chemical accident area, determine the risk level of hazardous chemical accidents based on the safety risk matrix.

[0275] Step 2.2: Based on the likelihood and severity of the potential impacts on human health, property damage, and social aspects caused by hazardous chemical accidents, classify the severity levels of hazardous chemical accidents from the dimensions of human health, accident type and location, and public opinion discussion heat. Determine the severity levels of hazardous chemical accidents under each dimension. The severity levels of hazardous chemical accidents under each dimension all include seven levels, namely Level A, Level B, Level C, Level D, Level E, Level F, and Level G.

[0276] Step 2.3: Use the risk classification level scoring model to determine the risk score of the hazardous chemical accident according to the levels of each dimension of the hazardous chemical accident, and combine the mapping relationship between the risk score and the risk value to determine the risk level of the hazardous chemical accident.

[0277] In this embodiment, based on the likelihood and severity of the potential impacts on human health, property damage, and social aspects caused by hazardous chemical accidents, classify the severity levels of hazardous chemical accidents from the dimensions of human health, accident type and location, and public opinion discussion heat. Based on the dimension of human health, classify the severity levels of hazardous chemical accidents into Levels A - G according to the impacts on human health and safety caused by hazardous chemical accidents; based on the dimension of accident type and location, classify the severity levels of hazardous chemical accidents into Levels A - G according to the impacts on property damage caused by hazardous chemical accidents; based on the dimension of public opinion discussion heat, classify the severity levels of hazardous chemical accidents into Levels A - G according to the social impacts of hazardous chemical accidents.

[0278] Among the severity levels of hazardous chemical accidents under each dimension, the score corresponding to Level A is 1 point, the score corresponding to Level B is 2 points, the score corresponding to Level C is 3 points, the score corresponding to Level D is 4 points, the score corresponding to Level E is 5 points, the score corresponding to Level F is 6 points, and the score corresponding to Level G is 7 points.

[0279] Multiply the scores determined by the dimensions of human health, accident type and location, and public opinion discussion heat, that is, multiply the values of the severity level X1 of the hazardous chemical accident, the severity level X2 of the hazardous chemical accident, and the severity level X3 of the hazardous chemical accident. In this embodiment, the highest score value is 7 3 and the minimum value is 1, and use the mapping relationship between the risk score and the risk value W to obtain the risk value of the hazardous chemical accident.

[0280] When the value range of the risk value is (75, 100], the risk level of the dangerous goods accident is determined as the red risk; when the value range of the risk value is (50, 75], the risk level of the dangerous goods accident is determined as the orange risk; when the value range of the risk value is (20, 50], the risk level of the dangerous goods accident is determined as the yellow risk; when the value range of the risk value is [0, 20], the risk level of the dangerous goods accident is determined as the blue risk.

[0281] Step 3: Based on the unstructured text information of the hazardous chemical accident, combine historical data to determine the possibility level of secondary accidents and the severity level of accidents occurring in the surrounding areas of the hazardous chemical accident, and use the safety risk matrix to conduct real-time evaluation and consequence rating of the risks in the surrounding areas of the hazardous chemical accident, which specifically includes the following steps:

[0282] Step 3.1: Based on the structured text information of the hazardous chemical accident, combine the risk transfer laws of different types of accidents, calculate the risk evolution probability P of the hazardous chemical accident, and determine the possibility level L of secondary accidents occurring in the surrounding areas of the accident;

[0283] Step 3.2: Calculate the severity S of secondary accidents occurring in the surrounding areas of the hazardous chemical accident, and determine the severity level N of secondary accidents occurring in the surrounding areas of the hazardous chemical accident;

[0284] Step 3.3: According to the possibility level of secondary accidents occurring in the surrounding areas of the hazardous chemical accident and the severity level of secondary accidents occurring in the surrounding areas of the hazardous chemical accident, determine the risk value R of the secondary accident of the hazardous chemical;

[0285] Step 3.4: Determine the secondary accident risk score K according to the risk value R of the secondary accident of the hazardous chemical, and use the safety risk matrix to conduct real-time evaluation of the risk of the secondary accident of the hazardous chemical to determine the risk level of the secondary accident of the hazardous chemical.

[0286] Step 3.5: According to the risk classification of the hazardous chemical accident and the risk level of the secondary accident of the hazardous chemical, give reminders and warnings about the major hazard sources in the surrounding areas of the accident area.

[0287] In this embodiment, after the accident occurred at the intersection of Qinhuangdao Road and Zhaitangdao Road, Huangdao District, Qingdao City, Shandong Province, considering that there are multiple hazard sources in the area, there may be superposition of risks, and the nature of the risks may be different, resulting in mutual cancellation or promotion. Using the geographic information system combined with the nature of the accident that may act on the regional risk transmission and hazard sources, and using the methods of fault tree analysis and root cause analysis to calculate the risk value of a single enterprise that may be triggered after the accident, finally, the risk score of similar hazard sources in the area during the risk transmission process is obtained, and the possibility level L of secondary accidents occurring in the surrounding area of the hazardous chemical accident and the severity level N of secondary accidents occurring in the surrounding area of the hazardous chemical accident are determined, and the risk value R of the secondary hazardous chemical accident is obtained. Then, using the safety risk matrix, the risk in the surrounding area of the hazardous chemical accident is evaluated in real time to determine the risk level of the secondary hazardous chemical accident.

[0288] Step 4: Use the output end of the multi - related risk real - time evaluation terminal based on hazardous chemical accident information to push the risk level of the hazardous chemical accident and the risk level of the secondary hazardous chemical accident to the emergency management personnel and enterprise safety responsible persons preset at each level in a hierarchical sending manner, so as to remind the emergency management personnel and enterprise safety responsible persons at each level.

[0289] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0290] In the present invention, terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship words determined for facilitating the description of the structural relationship of each component or element of the present invention and do not specifically refer to any component or element in the present invention and should not be construed as a limitation of the present invention.

[0291] In the present invention, terms such as "connected" and "joined" should be understood in a broad sense, which can mean a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation of the present invention.

[0292] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A multi - associated risk real - time evaluation terminal based on hazardous chemical accident information, characterized in that, It includes a collector, a numbering device, a memory, a controller, an arithmetic unit, and an output end; An automatic search engine is provided in the collector, which is used to retrieve web pages related to hazardous chemical accidents on the Internet and obtain web page information; The input end of the numbering device is connected to the collector, and the output end is connected to the memory. It is used to filter duplicate web pages in the collector, assign numbers to each filtered web page, and send the numbers and web addresses of the retrieved web pages to the memory for storage; The memory is respectively connected to the controller, the arithmetic unit, and the output end. It is used to receive and store the numbers and web addresses of the web pages transmitted by the collector, transfer the stored data to the controller and the arithmetic unit, and store the operation results of the controller and the arithmetic unit; The controller is connected to the arithmetic unit and is used to control the arithmetic unit to process the hazardous chemical accident information collected by the collector through retrieval; The arithmetic unit is preset with a risk assessment index system for hazardous chemical accident areas. It is used to perform fuzzy matching on the hazardous chemical accident information collected by the collector through retrieval. By using a directed crawler to extract and store the casualty information, occurrence area, and accident type information of hazardous chemical accidents, combined with public opinion heat analysis information, it fuzzily matches and extracts structured text data, and performs real-time analysis based on a semantic analysis tool of a neural network to obtain the risk value of the accident in real time and classify it based on a matrix; The output end is used to perform a risk assessment on the hazardous chemical accident according to the accident occurrence time, accident occurrence location, accident type, and casualty situation extracted by the arithmetic unit, determine and output the risk level of the hazardous chemical accident, and timely remind relevant staff.

2. The multi-associated risk real-time evaluation terminal based on hazardous chemical accident information according to claim 1, wherein The web page information on the Internet is mainly in HTML structure, which is a hypertext label in a logical format.

3. The multi-associated risk real-time evaluation terminal based on hazardous chemical accident information according to claim 1, characterized in that, A Bloom filter is preset in the numbering device.

4. The multi-associated risk real-time evaluation terminal based on hazardous chemical accident information according to claim 1, characterized in that, The hazardous chemical accident information in the arithmetic unit is processed using an extended TF indexing method TFE. A word segmentation dictionary is also preset in the arithmetic unit based on the hazardous chemical accident theme field, which is used to screen out non-topic words in each label of the web page information.

5. The multi - associated risk real - time evaluation terminal based on hazardous chemical accident information according to claim 4, characterized in that, An AC automaton multi-pattern string matching algorithm is preset in the arithmetic unit, which is used to retain the pure text content under the key labels to be processed after screening and automatically preprocess to remove words with no clear meaning in the pure text content.

6. The multi-associated risk real-time evaluation terminal based on hazardous chemical accident information according to claim 5, characterized in that, A text relationship extraction model is set in the arithmetic unit. The text relationship extraction model is constructed based on a multi-channel convolutional neural network and is used to analyze the syntactic and semantic features of the text to achieve end-to-end relationship extraction.

7. The multi-associated risk real-time evaluation terminal based on hazardous chemical accident information according to claim 6, characterized in that, A Sunday algorithm string matching algorithm is also set in the arithmetic unit, which is used to perform fuzzy matching on the prefabricated structured information of hazardous chemical accidents and the collected accident structured text to determine the main attribute labels.

8. The multi - associated risk real - time evaluation terminal based on hazardous chemical accident information according to claim 7, characterized in that, The main attribute labels include the accident occurrence time, accident occurrence location, accident type, and casualty situation.

9. A real-time multi-correlation risk assessment method based on hazardous chemical accident information, characterized in that, Using the multi-correlation risk real-time evaluation terminal based on hazardous chemical accident information as described in any one of claims 1 to 8, specifically including the following steps: Step 1, using the multi-correlation risk real-time evaluation terminal based on hazardous chemical accident information to obtain the unstructured text information of hazardous chemical accidents in real time; Step 2, construct a risk assessment index system for the hazardous chemical accident area, and use the constructed risk assessment index system for the hazardous chemical accident area to determine the risk level of the hazardous chemical accident; Step 3, based on the unstructured text information of the hazardous chemical accident, combine historical data to determine the likelihood level of secondary accidents and the severity level of accidents occurring in the surrounding areas of the hazardous chemical accident, and use a safety risk matrix to conduct real-time evaluation and consequence rating of the risks in the surrounding areas of the hazardous chemical accident; Step 4, use the output end of the multi-associated risk real-time evaluation terminal based on the hazardous chemical accident information to push the risk level of the hazardous chemical accident and the risk level of the hazardous chemical secondary accident to the emergency management personnel and enterprise safety responsible persons preset in each level in a hierarchical sending manner, and remind the emergency management personnel and enterprise safety responsible persons in each level.

10. The real-time multi-associated risk assessment method based on hazardous chemical accident information according to claim 9, wherein, In the said Step 1, it specifically includes the following steps: Step 1.1, turn on the multi-associated risk real-time evaluation terminal based on the hazardous chemical accident information, use the collector in the multi-associated risk real-time evaluation terminal based on the hazardous chemical accident information to retrieve the web pages of news related to the hazardous chemical accident in the Internet, obtain the web page information, and send the obtained web page information to the numbering device; Step 1.2, based on the breadth-first algorithm and the persistent remote dictionary service, use the Bloom filter preset in the numbering device to perform duplicate removal processing on the web page information collected by the collector. After the duplicate removal processing, use the numbering device to assign numbers to each web page so that each web page has a unique number, and send the numbers and web addresses of all web pages to the memory for storage; Step 1.3, use the controller to control the arithmetic unit to classify the tags in the web page information according to the web page information corresponding to each web page number in combination with the structural characteristics of the HTML file, use the extended TF indexing method TFE to divide the tags with similar importance factors into the same category, and use the word segmentation dictionary to screen out the non-topic words in the same category of tags to obtain the screened tags; Step 1.4, use the AC automaton multi-pattern string matching algorithm preset in the arithmetic unit to delete the text content irrelevant to the hazardous chemical accident in the tag at one time, only retain the pure text content related to the hazardous chemical accident, and use the arithmetic unit to preprocess the obtained pure text content to remove the words with no clear meaning in the pure text content to obtain the pure text file processed by the AC automaton multi-pattern string matching algorithm; Step 1.5, input the pure text file processed by the AC automaton multi-pattern string matching algorithm into the text relation extraction model preset in the arithmetic unit. The text relation extraction model is constructed based on the multi-channel convolutional neural network. Use the shortest dependency path algorithm of the multi-channel convolutional neural network to model the sentence, integrate syntactic analysis and deep learning, extract text relations, parse the syntactic features and semantic features of the text, obtain the extraction result of the text relation extraction model, and output the processed accident structured text; Step 1.6, using the Sunday algorithm string matching algorithm, perform fuzzy matching between the prefabricated structured information of hazardous chemical accidents and the processed accident structured text, obtain the main attribute tags of the accident structured text, and splice and arrange the accident structured text in the preset information order to obtain the unstructured text information of hazardous chemical accidents.

11. The real-time multi-associated risk evaluation method based on hazardous chemical accident information according to claim 10, characterized in that, The text relation extraction model is set as the MCNN_Att_RL model based on the multi-channel mechanism; The MCNN_Att_RL model based on the multi-channel mechanism includes a vector mapping layer, an attention layer, a convolutional layer, a segmented average pooling layer, a max pooling layer, and a fully connected layer; When the word vector is input into the MCNN_Att_RL model based on the multi-channel mechanism, the word vector will be separately input and mapped into a two-channel convolutional neural network for processing. The two-channel convolutional neural network includes a first channel and a second channel. Among them, an attention mechanism is added to the second channel to obtain an entity-oriented vector representation. After obtaining multiple channel information through the two-channel convolutional neural network, it will be divided into multiple segments of information according to the entity position and integrated into the structural information of the sentence through the average pooling layer. After that, the final representation of the sentence is learned through the max pooling layer and output to obtain the extraction result; The two-channel convolutional neural network uses the first channel and the second channel to fuse two types of word vectors to obtain different semantic features of words. Among them, pre-trained Chinese word vectors are used in the first channel, and Chinese word vectors specific to the second channel are used; The attention layer automatically captures the correlation between words and sentences by introducing the attention mechanism. An attention matrix is set in the attention layer. By using the attention matrix to calculate the correlation between each word in the input text content and the hazardous chemical accident, a correlation matrix is calculated to obtain a vector for the entity pair, and a sentence vector integrating semantic information is obtained; Filters are set in the convolutional layer to learn different n-gram features; when the sentence vector integrating semantic information is input into the convolutional layer, the filters in the convolutional layer perform convolutional operations on the sentence vector integrating semantic information to obtain local features of the sentence. By performing convolutional operations on the sentence vector integrating semantic information multiple times, high-order sentence features are obtained, and the processed feature vector is obtained and input into the average pooling layer; The average pooling layer is used to obtain the structural information of the sentence. After dividing the input feature vector into multiple segments and determining the start position and end position of each segment of the feature vector, each segment of the feature vector is respectively input into the average pooling layer for processing and fusion to obtain a feature vector integrating the sentence structure information, and the feature vector integrating the sentence structure information is input into the max pooling layer; The max pooling layer is used to perform a maximization operation on the feature vector integrating the sentence structure information, obtain the final output feature information, and transmit it to the fully connected layer for global adjustment for output, obtain the extraction result of the word vector through the MCNN_Att_RL model based on the multi-channel mechanism, and output the processed accident structured text.

12. The real-time multi-associated risk evaluation method based on hazardous chemical accident information according to claim 11, wherein, The MCNN_Att_RL model based on the multi-channel mechanism is provided with a Softmax classification function and a loss function. Among them, the Softmax classification function is used to calculate the relationship probability, and the correlation between the sentence vector and the relationship category is used as the score; the loss function adopts a margin-based ranking loss function.

13. The real-time multi-associated risk evaluation method based on hazardous chemical accident information according to claim 11, characterized in that The MCNN_Att_RL model based on the multi-channel mechanism is trained using the Adadelta optimization algorithm.

14. The real-time multi-related risk evaluation method based on hazardous chemical accident information according to claim 10, characterized in that, In step 2, it specifically includes the following steps: Step 2.1, using the risk degree analysis method, combining the regulations on individual risk benchmarks and social risk benchmarks in "GB 36894-2018 Risk Benchmarks for Hazardous Chemical Production Facilities and Storage Facilities", according to the personnel injuries, property losses, social impacts and the severity of the consequences of hazardous chemical accidents in the accident area of hazardous chemicals, determine the risk level of the hazardous chemical accident based on the safety risk matrix. The risk levels of the hazardous chemical accidents are divided into four levels, namely major risk, relatively large risk, general risk, and low risk. Step 2.2, according to the likelihood and severity of the possible personnel health impacts, property loss impacts, and social impacts of the hazardous chemical accident, divide the severity level of the hazardous chemical accident from the dimensions of personnel health, accident category and occurrence location, and public opinion discussion heat. Determine the severity level of the hazardous chemical accident under each dimension. The severity levels of the hazardous chemical accident under each dimension all include seven levels, namely level A, level B, level C, level D, level E, level F, and level G. Step 2.3, determine the danger score of the hazardous material accident according to the level of each dimension of the hazardous material accident, and combine the mapping relationship between the danger score and the risk value to determine the risk level of the hazardous material accident.

15. The real-time multi-associated risk assessment method based on hazardous chemical accident information according to claim 14, characterized in that In step 2.2, according to the likelihood and severity of the possible personnel health impacts, property loss impacts, and social impacts of the hazardous chemical accident, divide the severity level of the hazardous chemical accident from the dimensions of personnel health, accident category and occurrence location, and public opinion discussion heat. The specific classification criteria are as follows: Based on the dimension of personnel health, determine the severity level X1 of the hazardous chemical accident according to the impact of the hazardous chemical accident on personnel health and safety. The value of the severity level X1 of the hazardous chemical accident is determined according to the severity level. The judgment criteria for the severity level X1 of the hazardous chemical accident are as follows: Classify the hazardous chemical accident that causes slight impact on health / safety as level A; classify the hazardous chemical accident that causes moderate impact on health / safety as level B; classify the hazardous chemical accident that causes relatively large impact on health / safety as level C; classify the hazardous chemical accident that causes relatively large safety accidents resulting in deaths or serious injuries of personnel as level D; Classify the hazardous chemical accident that causes serious safety accidents as level E; classify the hazardous chemical accident that causes extremely major safety accidents as level F; classify the hazardous chemical accident that causes particularly major catastrophic safety accidents with a large number of casualties within or outside the factory boundary as level G. The judgment criteria for the hazardous chemical accident that causes slight impact on health / safety are as follows: When the hazardous chemical accident occurs, the injured need first aid or medical treatment, but do not need to be hospitalized, and there will be no loss of working days due to the injury caused by the hazardous chemical accident; the injured feel unwell due to short-term exposure exceeding the standard, but there will be no long-term health effects, and generally there are no casualties or no casualties are found; The judgment criteria for the hazardous chemical accident that causes moderate impact on health / safety are as follows: The occurrence of the hazardous chemical accident causes 1 to 2 people to be slightly injured; The judgment criteria for the hazardous chemical accident that causes greater impact on health / safety are as follows: The occurrence of the hazardous chemical accident causes more than 3 people to be slightly injured or 1 to 2 people to be seriously injured. When the hazardous chemical accident occurs, the personnel are exposed to exceed the standard and cause serious occupational diseases or long-term affect the health of the personnel; The judgment criteria for the hazardous chemical accident that causes major safety accidents resulting in deaths or serious injuries are as follows: The occurrence of the hazardous chemical accident causes 1 to 2 people to die or 3 to 9 people to be seriously injured within the boundary area; 1 to 2 people are seriously injured outside the boundary area; The judgment criteria for the hazardous chemical accident that causes serious safety accidents are as follows: The occurrence of the hazardous chemical accident causes 3 to 9 people to die or 10 to 50 people to be seriously injured within the boundary area; 1 to 2 people die or 3 to 9 people are seriously injured outside the boundary area; The judgment criteria for the hazardous chemical accident that causes extremely major safety accidents are as follows: The occurrence of the hazardous chemical accident causes 10 to 30 people to die or 50 to 100 people to be seriously injured within the boundary area; 3 to 9 people die or 10 to 50 people are seriously injured outside the boundary area; The judgment criteria for the hazardous chemical accident of a particularly major catastrophic safety accident that causes a large number of casualties within or outside the factory boundary area are as follows: The occurrence of the hazardous chemical accident causes the number of deaths within the boundary area to exceed 30 or the number of seriously injured to exceed 100; the number of deaths or the number of seriously injured outside the boundary area exceeds 10; Based on the dimensions of accident category and occurrence location, determine the severity level X2 of the hazardous chemical accident according to the impact of the hazardous chemical accident on property losses. The value of the severity level X2 of the hazardous chemical accident is determined according to the severity level. The judgment criteria for the severity level X2 of the hazardous chemical accident are as follows: If the occurrence of the hazardous chemical accident causes damage to equipment or unplanned shutdown of the device, the severity level of the hazardous chemical accident shall be classified as level A; If the hazardous chemical accident occurs in an open area and causes a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident shall be classified as level B; If the occurrence of the hazardous chemical accident causes a controllable leakage of hazardous chemicals, the severity level of the hazardous chemical accident shall be classified as level C; If the occurrence of the hazardous chemical accident causes 3 or more sets of devices to stop and there are local area controllable fires, explosions, and toxicant diffusion, the severity level of the hazardous chemical accident shall be classified as level D; If the hazardous chemical accident is an uncontrollable leakage near a high accident consequence area, the severity level of the hazardous chemical accident shall be classified as level E; If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion in a medium accident consequence area, the severity level of the hazardous chemical accident shall be classified as level F; If the hazardous chemical accident is an out-of-control fire, explosion, or toxicant diffusion in a high accident consequence area, the severity level of the hazardous chemical accident shall be classified as level G; Based on the dimension of public opinion discussion heat, determine the severity level X3 of the hazardous chemical accident according to the social impact of the hazardous chemical accident. The value of the severity level X3 of the hazardous chemical accident is determined according to the severity level. The judgment criterion of the severity level X3 of the hazardous chemical accident is as follows: If the occurrence of the hazardous chemical accident causes dissatisfaction, complaints or complaints from a small number of residents in the surrounding community in the short term, the number of retrieved information is extremely small, and there is no official news channel report, then the severity level of the hazardous chemical accident is classified as level A; If the occurrence of the hazardous chemical accident is reported by the local media in the short term and interferes with the daily operation of local public facilities, and there is a local fire short text report, then the severity level of the hazardous chemical accident is classified as level B; If the occurrence of the hazardous chemical accident is reported by the local media for a long time and causes adverse social impacts locally, seriously interfering with the daily operation of local public facilities, and there is a local fire text report, then the severity level of the hazardous chemical accident is classified as level C; If the occurrence of the hazardous chemical accident has caused local relevant regulatory departments to take mandatory measures, or is negatively reported by domestic or international media in the short term, and there are local fire text and picture reports, then the severity level of the hazardous chemical accident is classified as level D; If the occurrence of the hazardous chemical accident has attracted long-term attention from domestic or international media, has caused adverse social impacts within the provincial scope, seriously interfered with the daily operation of provincial public facilities, caused provincial relevant departments to take mandatory measures, or led to the revocation of production, operation and sales licenses in the local market, and there are reports from provincial departments, municipal emergency management, text, pictures and videos, then the severity level of the hazardous chemical accident is classified as level E; If the occurrence of the hazardous chemical accident has caused relevant departments to take mandatory measures, has caused serious social impacts nationwide, attracted key follow-up reports or series reports from domestic and international media, and there are reports from ministries, provincial, municipal emergency management, text, pictures and videos, then the severity level of the hazardous chemical accident is classified as level F; If the occurrence of the hazardous chemical accident has led to the revocation of production, sales or operation licenses in the main domestic and international markets, caused strong indignation or condemnation from the public or investors in the main domestic and international markets, and there are reports and reports from mainstream media, then the severity level of the hazardous chemical accident is classified as level G; Among the severity levels of the hazardous chemical accident under each dimension, the score corresponding to level A is 1 point, the score corresponding to level B is 2 points, the score corresponding to level C is 3 points, the score corresponding to level D is 4 points, the score corresponding to level E is 5 points, the score corresponding to level F is 6 points, and the score corresponding to level G is 7 points; Multiply the scores determined by the personnel health dimension, the accident category and occurrence location dimension, and the public opinion discussion heat dimension to obtain the risk score of the hazardous chemical accident.

16. The real-time multi-associated risk evaluation method based on hazardous chemical accident information according to claim 15, characterized in that The calculation formula of the risk score X is as follows: X = X1X2X3 (1) In the formula, X is the risk score, X1 is the value of the severity level of the hazardous chemical accident, X2 is the value of the severity level of the hazardous chemical accident, and X3 is the value of the severity level of the hazardous chemical accident; The mapping relationship between the risk score and the risk value is: Where W is the risk value; Determine the risk level of the dangerous goods accident according to the risk value. When the value range of the risk value is (75, 100], determine that the risk level of the dangerous goods accident is a red risk; when the value range of the risk value is (50, 75], determine that the risk level of the dangerous goods accident is an orange risk; when the value range of the risk value is (20, 50], determine that the risk level of the dangerous goods accident is a yellow risk; when the value range of the risk value is [0, 20], determine that the risk level of the dangerous goods accident is a blue risk.

17. The real - time multi - related risk evaluation method based on hazardous chemical accident information according to claim 14, characterized in that, In step 3 mentioned above, it specifically includes the following steps: Step 3.1, based on the structured text information of the hazardous chemical accident, combined with the risk transfer laws of different types of accidents, calculate the risk evolution probability P of the hazardous chemical accident, and determine the possibility level L of the occurrence of secondary accidents in the surrounding area of the accident. Step 3.2, calculate the severity S of the occurrence of secondary accidents in the surrounding area of the hazardous chemical accident, and determine the severity level N of the occurrence of secondary accidents in the surrounding area of the hazardous chemical accident. Step 3.3, determine the risk value R of the secondary accident of the hazardous chemical according to the possibility level of the occurrence of secondary accidents in the surrounding area of the hazardous chemical accident and the severity level of the occurrence of secondary accidents in the surrounding area of the hazardous chemical accident. Step 3.4, determine the secondary accident risk score K according to the risk value R of the secondary accident of the hazardous chemical, and use the safety risk matrix to conduct real-time evaluation of the risk of the secondary accident of the hazardous chemical, and determine the risk level of the secondary accident of the hazardous chemical. Step 3.5, according to the risk classification of the hazardous chemical accident and the risk level of the secondary accident of the hazardous chemical, give reminders and warnings about the major hazard sources in the surrounding area of the accident area.

18. The real-time multi-related risk evaluation method based on hazardous chemical accident information according to claim 17, characterized in that In step 3.1 mentioned above, through the fault tree analysis of the hazardous chemical accidents that have occurred at home and abroad, take the types of hazardous chemicals as the first-level classification, count the number of accidents of the same type of hazardous chemicals and the number of accidents in each evolution sequence, and establish a statistical matrix X(a, b, c) of the number of accidents in different evolution sequences; In the statistical matrix X(a, b, c) of the number of accidents in different evolution sequences, the row index is the type of substance, the column index is the current accident type, and the depth index is the type of secondary accident; the value range of the row index is set to 0 to x, where x is the total number of hazardous chemical accident substances counted; the value of the column index is set to 0 to 2, where 0 represents the initial accident is leakage, 1 represents the initial accident is fire, and 2 represents the initial accident is explosion; the value of the depth index is 0 to 2, 0 represents the secondary accident is leakage, 1 represents the secondary accident is fire, and 2 represents the secondary accident is explosion; Obtain the risk evolution probability matrix of different hazardous chemical accidents. Among them, the value of the current accident state b is determined by the structured text information. Based on the risk evolution probability matrix of different hazardous chemical accidents, the calculation formula for the risk evolution probability P of the hazardous chemical accident is: Where P(a, b, c) is the evolution probability of hazardous chemical a occurring a c-type secondary accident in the current accident state; X(a, b, c) is the number of accidents of hazardous chemical a occurring a c-type secondary accident in the current accident state; a, b, and c are all the names of hazardous chemicals; is the total number of various accidents of hazardous chemical a; Based on the evolution probability of a specified secondary accident occurring to hazardous chemicals in the current accident state, the probability of a secondary accident occurring to hazardous chemicals in the current accident state is calculated, as shown in formula (4): Where, P a is the probability of a secondary accident occurring for hazardous chemical a under the current accident conditions.

19. The real-time multi-related risk assessment method based on hazardous chemical accident information according to claim 18, wherein In step 3.1, the possibility levels of the occurrence of the secondary accident are set from low to high as level 1, level 2, level 3, level 4, level 5, level 6, and level 7; the possibility level L of the occurrence of the secondary accident in the surrounding area of the accident is determined according to the evolution probability P of the hazardous chemical accident risk, and the value of the possibility level L of the occurrence of the secondary accident in the surrounding area of the accident takes values from 1 to 7 corresponding to levels 1 to 7; Among them, if the probability of a secondary accident occurring for hazardous chemicals in the current accident state does not exceed 10 -6 , then the possibility level of the secondary accident occurring is determined to be level 1, and the value of the possibility level L of the secondary accident occurring in the surrounding area of the accident is 1; If the probability range of secondary accidents occurring for hazardous chemicals under the current accident conditions is (10 -6 , 10 -5 , then the likelihood level of secondary accidents occurring is determined to be Level 2, and the likelihood level L of secondary accidents occurring in the surrounding areas of the accident is taken as 2; If the probability range of a secondary accident occurring for hazardous chemicals under the current accident conditions is (10 -5 , 10 -4 , then the likelihood level of the secondary accident is determined to be level 3, and the value of the likelihood level L of the secondary accident occurring in the surrounding area of the accident is 3; If the probability range of secondary accidents occurring for hazardous chemicals under the current accident conditions is (10 -4 , 10 -3 , then the likelihood level of secondary accidents occurring is determined to be level 4, and the value of the likelihood level L of secondary accidents occurring in the surrounding area of the accident is 4; If the probability value range of secondary accidents occurring for hazardous chemicals under the current accident conditions is (10 -3 , 10 -2 , then the likelihood level of secondary accidents occurring is determined to be level 5, and the value of the likelihood level L of secondary accidents occurring in the surrounding area of the accident is 5; If the probability range of secondary accidents occurring for hazardous chemicals under the current accident conditions is (10 -2 , 10 -1 , then the likelihood level of secondary accidents occurring is determined to be level 6, and the value of the likelihood level L of secondary accidents occurring in the surrounding area of the accident is 6; If the probability range of secondary accidents occurring for hazardous chemicals under the current accident conditions is (10 -1 , 1], then the likelihood level of secondary accidents occurring is determined to be level 7, and the value of the likelihood level L of secondary accidents occurring in the surrounding area of the accident is 7.

20. The real-time multi-related risk assessment method based on hazardous chemical accident information according to claim 17, wherein, In step 3.2, through the fault tree analysis of the hazardous chemical accidents that have occurred at home and abroad, the types of hazardous chemicals are used as the first-level classification, the number of casualties in the accidents related to the same type of hazardous chemicals and the number of casualties in each evolution sequence accident are counted, and the hazard coefficient H of different hazardous chemical accident risk evolution sequences is obtained, where the value of the current accident state b is obtained according to the structured text information; The calculation formula for the hazard coefficient H of the hazardous chemical accident risk evolution sequence is: In the formula, H(a, b, c) is the hazard coefficient of hazardous chemical a occurring a type c secondary accident in the current accident state; D(a, b, c) is the number of deaths of hazardous chemical a occurring a type c secondary accident in the current accident state; I(a, b, c) is the number of injured of hazardous chemical a occurring a type c secondary accident in the current accident state; Based on the hazard coefficient H of the hazardous chemical accident risk evolution sequence, the severity of the secondary accident of the hazardous chemical in the current accident state is calculated as: where S a is the severity of the secondary accident of hazardous chemical a under the current accident condition.

21. The real-time multi-related risk assessment method based on hazardous chemical accident information according to claim 20, characterized in that The severity levels of the occurrence of the secondary accident are set from low to high as level 1, level 2, level 3, level 4, level 5, level 6, and level 7. The value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is determined according to the severity S of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident. The value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is set to 1 to 7; Among them, if the severity of the secondary accident of the hazardous chemical under the current accident condition does not exceed 10 -3 , then it is determined that the severity level N of the secondary accident occurring in the surrounding area of the hazardous chemical accident takes the value of 1; If the value range of the severity of secondary accidents of hazardous chemicals in the current accident state is (10 -3 , 10 -2 , then the severity level N of secondary accidents occurring in the surrounding area of the hazardous chemical accident is determined to be 2; If the value range of the severity of secondary accidents of hazardous chemicals in the current accident state is (10 -2 , 10 -1 , then the severity level N of secondary accidents occurring in the surrounding area of the hazardous chemical accident is determined to be 3; If the value range of the severity of secondary accidents of hazardous chemicals in the current accident state is (10 -1 , 1], then it is determined that the severity level N of secondary accidents occurring in the surrounding area of the hazardous chemical accident takes the value of 4; If the value range of the severity of the secondary accident of the hazardous chemical in the current accident state is (1, 10], then it is determined that the value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is 5; If the value range of the severity of the secondary accident of the hazardous chemical in the current accident state is (10, 100], then it is determined that the value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is 6; If the severity of the secondary accident of the hazardous chemical in the current accident state is greater than 100, then it is determined that the value of the severity level N of the occurrence of the secondary accident in the surrounding area of the hazardous chemical accident is 7.

22. The real-time multi-correlation risk evaluation method based on hazardous chemical accident information according to claim 17, wherein, In step 3.3, the risk value generated by the single risk source is: R = L × N (7) In the formula, R is the risk value generated by the single risk source.

23. The real-time multi-related risk assessment method based on hazardous chemical accident information according to claim 17, characterized in that In step 3.4, the mapping relationship between the secondary accident risk score K and the secondary accident risk value R of the hazardous chemical is: In the formula, K is the secondary accident risk score; Determine the risk level of the secondary accident of the dangerous goods according to the secondary accident risk score K; When the value range of the secondary accident danger score K is (75, 100], the risk level of the secondary accident is determined to be a red risk; When the value range of the secondary accident danger score K is (50, 75], the risk level of the secondary accident is determined to be an orange risk; When the value range of the secondary accident danger score K is (20, 50], the risk level of the secondary accident is determined to be a yellow risk; When the value range of the secondary accident danger score K is [0, 20], the risk level of the secondary accident is determined to be a blue risk.

24. The real-time multi-related risk assessment method based on hazardous chemical accident information according to claim 23, characterized in that, Taking time as a variable to correct the secondary accident danger score K, and combining the statistics of the historical accident evolution time, the calculation formula of the secondary accident danger score K is optimized as: In the formula, t is time, and K(t) is the secondary accident danger score after t minutes from the occurrence of the incident.

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