Electronic document management system for marine plastic waste based on blockchain technology

Abstract

The present invention provides an electronic document management system for marine plastic waste based on blockchain technology. [Solution] This application belongs to the field of marine plastic waste management, and includes a cloud management platform located at the central node of the blockchain and service sites located at the remaining nodes, the cloud management platform is for monitoring and managing the marine waste transfer process between each service site, checks the electronic identity card of the service site that issues the marine waste transfer order request through a blacklist / whitelist mechanism, and for the electronic identity card that has exceeded its validity period, updates the status and validity period of the electronic identity card through a credit evaluation model, and rejects the marine waste transfer order request issued by the service site in the blacklist. The present invention realizes centralized management based on the blockchain architecture, realizes the handover of tasks between each node through a pre-compiled smart contract, and ensures a complete evidence chain in the entire process of collecting, transporting and treating marine plastic waste through the blacklist / whitelist mechanism of the credit evaluation model, making data traceable and easy to monitor and manage.

Description

[Technical field]

[0001] The present invention relates to the field of marine plastic waste management, and in particular to an electronic document (management system) for marine plastic waste based on blockchain technology. [Background technology]

[0002] The disposal of marine plastic waste has always been a difficult problem in the field of marine environmental protection that requires an urgent solution. Governments, enterprises, research institutes, and the general public are all exploring and practicing how to control and reduce the number of marine plastic waste. The sorting, collection, recycling and recycling of marine plastic waste is currently one of the most environmentally friendly methods, and an international marine plastic waste recycling and high-value utilization market has been formed, which is larger in scale and has developed needs, guided by global famous brands. Because the cost of collecting and recycling marine plastic waste is much higher than the cost of collecting and recycling land-based plastic waste, and the international market demand for marine recycled plastic is large and the price is high, how to ensure that recycled plastic in the market comes from the sea, and how to prevent the mixing or counterfeiting of land-based recycled plastic, are important issues of concern to the global marine plastic waste recycling and high-value utilization industry and market.

[0003] The international Ocean Bound Plastics (OBP) traceability certification system mainly relies on self-declaration of the source of marine plastics, and it is difficult to provide an objective, accurate and operable standard to ensure that they originate from the ocean. There is a high risk of marine plastics being "greened" globally, which hinders the development of the marine plastic recycling industry. In order to promote the treatment of marine environments around the world and encourage the removal of these marine plastics from the marine environment through recycling, it is necessary to solve the "trust" problem of marine plastic sources through digitalization technology, and a set of evidence chains to ensure that the data information of the entire process of collecting, storing, relaying, transporting and recycling marine plastics from the marine environment is true, accurate and not artificially tampered with. At present, a complete management system from collection to processing of a set of marine plastics has not yet been reported, so there are always "trade barriers due to environmental regulations" in the international market for marine plastics.

[0004] In the prior art, land-based hazardous waste management plans are more mature, but in the actual operation process, they are less conducive to integrated management and more dispersed. When the land-based hazardous waste treatment process is applied to the marine plastic waste treatment process, it also encounters problems such as difficulty in monitoring and management, lack of evidence chain, and difficulty in statistically collating treatment data. Summary of the Invention [Problem to be solved by the invention]

[0005] In response to the deficiencies of the prior art, the present invention discloses an electronic ledger management system for marine plastic waste based on blockchain technology, and relies on blockchain technology to establish a complete marine plastic waste management system, manage marine plastic waste from the source of collection, regulate each service site based on the blacklist / whitelist management mechanism, and ensure the accuracy and traceability of data on-chain. [Means for solving the problem]

[0006] In order to achieve the above object, the technical solutions used in the present invention are as follows:

[0007] A marine plastic waste electronic ledger management system based on blockchain technology, comprising: a cloud management platform located at a central node of the blockchain; and a service site located at the remaining nodes of the blockchain, the service site including a marine waste collection end, a marine waste transport relay end, a marine waste accumulation end, a marine waste transport end, and a marine waste disposal end, the marine waste collection end, the marine waste transport relay end, and the marine waste accumulation end issuing a marine waste transfer order request to the cloud management platform in a smart contract manner; The cloud management platform is for monitoring and managing the marine debris transfer process between each service site, checking the electronic identity card of the service site that issues the marine debris transfer order request through a blacklist / whitelist mechanism, calling up the corresponding service site data to check the service site through a credit evaluation model if the electronic identity card exceeds the validity period, and updating the status and validity period of the electronic identity card according to the checking result, rejecting the marine debris transfer order request of the service site if the electronic identity card is on the blacklist, and broadcasting the marine debris transfer order request of the service site to the marine debris transport end, which receives a control command from the cloud management platform to transport marine debris from the marine debris collection end to a marine debris transport relay end or a marine debris accumulation end, or transporting marine debris from the marine debris transport relay end to a marine debris accumulation end or a marine debris disposal end, or transporting marine debris from the marine debris accumulation end to the marine debris disposal end.

[0008] Furthermore, the credit evaluation model is expressed as I = [C, G, Z, H], C indicates the number of violations by the worker, G indicates the abnormal amount of marine plastic waste collection, Z indicates the number of transfer order requests, and H indicates the transfer amount. If the output result of any one of the terms of the credit evaluation model is abnormal, the cloud management platform will blacklist the electronic identity card of the service site that issues the marine waste transfer order request; if the output results of all the terms of the credit evaluation model are normal, the cloud management platform will whitelist the electronic identity card of the service site that issues the marine waste transfer order request, and a validity period is set for the electronic identity card information, and electronic identity card information that exceeds the validity period is removed from the blacklist / whitelist.

[0009] Furthermore, the method for determining an abnormal value of the amount of collected marine plastic waste includes the following steps (1) to (4): In the step (1), historical sample data of a service site in three different sections, namely, off-season, normal season, and busy season, is obtained, and a weight prediction value of the sample data in different sections is calculated; In the step (2), a correction factor is calculated based on the weight prediction value of the sample data and the actual reported value of the service site; In the step (3), a weight comparison value is calculated based on a correction coefficient according to the following formula 2:

number

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention uses a blacklist / whitelist mechanism to check the electronic identity of the service site that issues the marine litter transfer order request, and in the case of an electronic identity that has exceeded its validity period, updates the status and validity period of the electronic identity through a credit evaluation model, and rejects the marine litter transfer order request issued by the service site in the blacklist.On the one hand, the present invention realizes centralized management based on the blockchain architecture, and realizes the handover of tasks between each node through pre-compiled smart contracts, and on the other hand, the blacklist / whitelist mechanism of the credit evaluation model ensures a complete chain of evidence in the entire process of collecting, transporting and treating marine plastic litter, making data traceable and easy to monitor and manage. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of an electronic document management system for marine plastic waste according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a management system according to an embodiment of the present invention implemented by a blockchain. [Diagram 3] FIG. 3 is a schematic diagram of a management process for an example in which a marine debris collection terminal sends a transfer order request to a cloud management platform in accordance with an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of a management process for an example in which a marine debris accumulation end sends a transfer order request to a cloud management platform in accordance with an embodiment of the present invention. [Diagram 5] FIG. 5 is a flowchart showing a method for determining abnormalities in the amount of collected marine plastic waste according to an embodiment of the present invention. [Figure 6] FIG. 6 is a flow chart showing a process from collection to disposal of marine debris according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in more detail below by means of examples with reference to the drawings. It should be understood that the specific examples described herein are merely for the purpose of illustrating the present invention, and are not intended to limit the present invention.

[0014] On the contrary, the present invention includes any alternatives, modifications, equivalent methods, and solutions made based on the spirit and scope of the present invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, some specific details are explained in detail in order to facilitate a better understanding of the present invention to the general public. Those skilled in the art can fully understand the present invention without the need for the explanation of these details.

[0015] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art. The terms used in the present invention are merely for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the associated listed items.

[0016] As shown in Figure 1, this embodiment is an electronic document management system for marine plastic waste based on blockchain technology, which mainly includes the following:

[0017] The cloud management platform manages the transfer process of marine plastic waste from the collection end to the disposal end based on pre-compiled smart contracts.

[0018] The marine debris collection terminal is for collecting marine debris and uploading the evidence package to the cloud management platform.

[0019] The marine litter transport relay point is considered to be a transport relay and accumulation site for marine litter.

[0020] The marine litter pool edge is designated as a target pool for marine litter.

[0021] The marine debris transport terminal receives control commands from the cloud management platform and transfers the marine debris accordingly.

[0022] The marine debris disposal site is used to dispose of marine debris.

[0023] The marine waste collection end, marine waste transportation relay end, marine waste accumulation end, marine waste transportation end and marine waste disposal end are service sites, which are integrated and managed by the cloud management platform. The present invention realizes an electronic ledger management system for marine plastic waste using blockchain architecture, with the cloud management platform located at the central node of the blockchain and each service site located at the remaining nodes of the blockchain.

[0024] In one specific implementation of the present invention, as shown in Figure 2, the node at the center position is marked as the central node, and the remaining nodes around the central node are marked as the first node, the second node, the third node, the fourth node, and the fifth node, and these five nodes are not numbered in order in the sequence diagram of the blockchain shown in Figure 2, and the marine debris collection end is located at the first node of the blockchain, the marine debris transport relay end is located at the third node of the blockchain, the marine debris accumulation end is located at the fourth node of the blockchain, the marine debris transport end is located at the second node of the blockchain, and the marine debris disposal end is located at the fifth node of the blockchain. Note that, because the marine debris transport end basically serves the transfer tasks between all service nodes and the next node, for the convenience of display, not all arrows having an interaction relationship with the marine debris transport end are drawn in Figure 2.

[0025] The cloud management platform is located at the central node of the blockchain, and can monitor and manage the marine debris transfer process between each service site. It checks the electronic identity card of the service site that issues the marine debris transfer order request through a blacklist / whitelist mechanism. If the electronic identity card exceeds the validity period, it calls up the corresponding service site data and checks the service site through a credit evaluation model. It updates the status and validity period of the electronic identity card according to the checking result. If the electronic identity card is on the blacklist, it rejects the marine debris transfer order request of the service site. If the electronic identity card is on the whitelist, it broadcasts the marine debris transfer order request of the service site to the marine debris transport end. The marine debris transport end receives a control command from the cloud management platform to transport the marine debris from the marine debris collection end to a marine debris transport relay end or a marine debris accumulation end, or transports the marine debris from the marine debris transport relay end to a marine debris accumulation end or a marine debris disposal end, or transports the marine debris from the marine debris accumulation end to the marine debris disposal end.

[0026] In one specific implementation of the present invention, the initial electronic identity certificates of all service sites deployed on the nodes of the blockchain are normal and are whitelisted.

[0027] In one specific implementation of the present invention, the marine debris collection end, the marine debris transportation relay end and the marine debris accumulation end issue a marine debris transfer order request to the cloud management platform in a smart contract manner, and a pre-compiled smart contract is set up at the lowest layer of the blockchain, specifically, The first node sends a transfer order request to the central node, the central node checks the electronic identity card information of the first node, if the check is passed, the central node broadcasts the received transfer order to the second node, after the second node receives the transfer order, the central node selects the third node or the fourth node as the target service site of the transfer order, the central node generates and seals the electronic document of the first node, The third node or the fourth node sends a transfer order request to the central node, the central node checks the electronic identity card information of the third node or the fourth node, if the check is passed, the central node broadcasts the received transfer order to the second node, after the second node receives the transfer order, the central node selects the fourth node or the fifth node as the target service site of the transfer order, the central node generates and seals the electronic document of the third node or the fourth node; After the transfer vehicle arrives at the target service site, the target service site checks the electronic document and the transfer vehicle information of the previous node, and if the check is passed, it accepts the transfer object; if the target service site is the 5th node, the central node generates and seals the electronic document of the 5th node, and archives all the transfer order completion progress corresponding to the transfer object in the 1st node; In the transfer process, the electronic document corresponding to the transfer order and the vehicle information for transfer are synchronized to the target service site node by the central node, and the next node can check only the electronic document of the previous node so as to compare the electronic document of the previous node with the electronic document of this node, and the central node can check the electronic documents of all nodes.

[0028] The communication between the cloud management platform located at the node of the blockchain and each of its service sites follows the above-mentioned smart contract, and the complex management process of the present invention can be executed in a smart contract manner. For example, take the case where the marine debris collection terminal located at the first node sends a transfer order request to the cloud management platform, as shown in Figure 3, the process includes the following steps S11 to S15.

[0029] In step S11, the marine debris collection station uploads an evidence package to the cloud management platform, and when a certain amount of collection is reached, it sends a transfer order request to the cloud management platform. The information in the evidence package includes basic information of the worker, the name of the marine debris collection station and its coordinate location, collection point, collection time, video footage of the collection process, types of marine debris plastic, weight data of marine debris, etc.

[0030] In step S12, the cloud management platform receives the collection process evidence package uploaded by the marine debris collection end, generates an evidence chain for the collection stage, and checks the electronic identity card of the marine debris collection end that issues the request based on the blacklist / whitelist. If the electronic identity card is on the whitelist, it broadcasts the marine debris transfer order request of the marine debris collection end to the marine debris transportation end. If the electronic identity card is on the blacklist, it rejects the request. If the electronic identity card of the service site is not on either the whitelist or the blacklist, the electronic identity card has expired, and the service site needs to be re-checked according to the credit evaluation model and the status and validity period of the electronic identity card need to be updated based on the check result. Similarly, an electronic identity card that is within the validity period is automatically listed on the blacklist or whitelist, and an electronic identity card that has exceeded the validity period is automatically removed from the blacklist or whitelist.

[0031] In this step, the cloud management platform will check the information in the evidence package. Take the collection point as an example. The collection scope is mainly determined according to the internationally recognized OBP ocean-bound plastics certification requirements, mainly: Potential marine plastics within 100m offshore from the lowest tide level and 50km onshore from the lowest tide level; Coastline marine plastic within 200m on land from the highest tide level and 100m offshore from the lowest tide level, and Plastic waste in rivers and within 200m of both banks of rivers. Collection may take place at sea (e.g. by hauling up the rubbish) or on land (e.g. by installing a barrage in the river to block the rubbish or by picking up the rubbish within the shoreline).

[0032] One optional implementation process includes: the collection unit includes collector information in its management, the collector needs to register his / her identity with the collection unit and create an account, the collection unit checks the identity and grants the created account relevant permissions for the marine plastic waste collection task; the collector receives the collection task by operating the mobile terminal and performs marine plastic waste collection work within the collection range planned in the cloud management platform; during the collection process, the collection unit obtains GPS positioning of the mobile terminal, and determines whether the collector exceeds the pre-planned collection range based on the video footage and the GPS positioning information, and records the number of violations; the collection unit enters the weight of the marine plastic waste through an electronic scale, checks the video footage of the collection process and compares it with the GPS positioning trajectory of the collection process, and synchronously uploads the partial information to the cloud management platform.

[0033] In step S13, all transfer vehicles at the marine waste transportation end are registered in the cloud management platform, and the registration information includes, but is not limited to, license plate information, transfer capacity information, real-time location of the transfer vehicles, etc., and all transfer vehicles are equipped with on-board monitoring and on-board positioning devices, and the cloud management platform obtains matching transfer vehicles based on the conventional transfer vehicle matching algorithm.

[0034] In step S14, after the transfer vehicle receives the transfer order, the cloud management platform generates and seals an electronic invoice for the marine debris collection end, and synchronizes information such as the electronic invoice, the transfer vehicle, etc. with the target service site, and the transfer vehicle transports the marine debris accumulated at the marine debris collection end to the marine debris transportation relay end or the marine debris accumulation end based on the control commands of the cloud management platform.

[0035] In addition, marine plastics from the marine debris collection end can be transferred to the marine debris transportation relay end or marine debris accumulation end, and a specific target service site is scheduled by the cloud management platform. The specific scheduling algorithm and the above-mentioned transfer vehicle matching algorithm can both be realized by conventional technology. Please refer to the vehicle dispatch scheduling model of the Chinese platform Didi, and detailed explanations will be omitted in the present invention.

[0036] In step S15, after the transfer vehicle arrives at the target service site, the target service site checks the electronic document and vehicle information of the marine debris collection site, and if the check is passed, accepts the transfer object.

[0037] In one specific implementation of the present invention, taking the case where a marine debris accumulation end located at the fourth node sends a transfer order request to the cloud management platform as an example, as shown in FIG. 4, the process includes the following steps S21 to S25.

[0038] In step S21, the marine debris accumulation end sends a transfer order request to the cloud management platform.

[0039] In step S22, the cloud management platform checks the electronic identity card of the marine debris accumulation end that issues the request based on the blacklist / whitelist, and if the electronic identity card is on the whitelist, it broadcasts the marine debris transfer order request of the marine debris accumulation end to the marine debris transport end; if the electronic identity card is on the blacklist, it rejects the request; if the electronic identity card of the service site is not on either the whitelist or the blacklist, the electronic identity card has expired, and the service site needs to be re-checked through the credit evaluation model, and the status and validity period of the electronic identity card need to be updated based on the check result; and just as the electronic identity card within the validity period is automatically listed on the blacklist or whitelist, the electronic identity card that has exceeded the validity period is automatically removed from the blacklist or whitelist.

[0040] In step S23, the cloud management platform obtains matching transfer vehicles based on a conventional transfer vehicle matching algorithm.

[0041] In step S24, after the transfer vehicle receives the transfer order, the cloud management platform generates and seals an electronic invoice for the marine debris accumulation end, and synchronizes information such as the electronic invoice, the transfer vehicle, etc. to the marine debris disposal end, and the transfer vehicle transports the marine debris from the marine debris accumulation end to the marine debris disposal end based on the control commands of the cloud management platform.

[0042] In step S25, after the transfer vehicle arrives at the marine waste disposal end, the marine waste disposal end checks the electronic invoice and vehicle information of the marine waste accumulation end. If the check is passed, the transferred items are received, and the cloud management platform generates and seals an electronic invoice for the marine waste disposal end, and archives all transfer order completion progress corresponding to the transferred items at the marine waste collection end, ensuring a complete evidence chain in the entire collection, transportation and treatment process of marine plastic waste, and the data is traceable and easy to monitor and manage.

[0043] In one specific implementation of the present invention, the credit evaluation model is expressed as I = [C, G, Z, H], where C indicates the number of violations by the worker, G indicates the abnormal collection amount of marine plastic waste, Z indicates the number of transfer order requests, and H indicates the transfer amount. If the output result of any one of the terms of the credit evaluation model is abnormal, the cloud management platform will blacklist the electronic identity card of the service site that issues the marine waste transfer order request; if the output results of all the terms of the credit evaluation model are normal, the cloud management platform will whitelist the electronic identity card of the service site that issues the marine waste transfer order request, and a validity period is set for the electronic identity card information, and electronic identity card information that exceeds the validity period is removed from the blacklist / whitelist.

[0044] Each service site is managed by a cloud management platform, and when an operator of a service site performs a violation, the name of the site and the time of the violation are automatically uploaded, and when a credit evaluation is performed on the number of violations of an operator for a certain service site, the number of violations within the evaluation period is obtained based on the evaluation period preset in the platform, for example, if the evaluation period is three months, no violations have been recorded three months ago. In this embodiment, the violations include, but are not limited to, collecting marine plastics outside the range, not placing monitoring devices according to requirements, not storing video of the collection process, etc.

[0045] The cloud management platform also records the transfer order requests and request times of each service site, whether the requests have been received, etc., and for a service site that receives fewer requests within an evaluation period than a certain value, the service site is described as inactive and its evaluation result is abnormal. Since the requests submitted by the abnormal service site are not received, the service site needs to be manually checked to be put on the whitelist again, and if the manual check is passed, its electronic identity card is initialized and it is put on the whitelist.

[0046] Since the size of the transfer amount is related to the transfer cost and the activity of the service site, a minimum transfer amount is set in the management system of the present invention, and for a service site whose total transfer amount within the evaluation period is lower than a certain value, its evaluation result is treated as abnormal, similar to the processing method for when the number of transfer order requests is abnormal.

[0047] In the actual operation process, an incentive system is set up to encourage the removal of marine plastic waste from the marine environment, and marine plastic waste is collected at a high cost, and the collection subsidy standard is much higher than that of general land-based plastic waste. Therefore, in order to avoid the false identification of marine plastic with out-of-range plastic waste, an abnormal collection amount judgment is set up, which improves the intensity and convenience of monitoring management compared with manual monitoring management. Therefore, the judgment of the abnormal value of the collection amount of marine plastic waste is particularly important, and the judgment of the abnormal value is related to the difference between the predicted weight value of the marine plastic waste to be transferred by the service site and the actual reported value of the service site, and is also affected by factors such as season and environment. Taking into account various influencing factors, this embodiment designs a method for judging the abnormal value of the collection amount of marine plastic waste, which includes the following (1) to (4), as shown in FIG. 5.

[0048] In (1), historical sample data of the service site in three different sections, i.e., off-season, normal season, and busy season, are obtained, and the weight prediction value of the sample data in different sections is calculated. For example, according to the actual situation of a certain sea area, June to September is divided into the busy season, November to February is divided into the off-season, and the rest are divided into the normal season.

[0049] Because the collection of marine plastic litter is affected by various uncontrollable factors, the amount collected also varies, making it difficult to remove noise from the data using normal mixed statistics. This leads to errors in identifying outliers, and judgment by section contributes to improving the accuracy of judgment.

[0050] In (2), a correction coefficient is calculated based on the weight prediction value of the sample data and the actual reported value of the service site, where the correction coefficient=actual reported value−predicted weight value.

[0051] In this embodiment, the weight prediction value is obtained by calculating a linear regression equation model, and the arguments of the linear regression equation model include tide level, wind force grade, weather type, and season type. By collecting historical data from the past year and statistically calculating the tide level, wind force grade, weather type, season type, and marine litter collection amount, the trend of marine litter collection amount that changes with the tide level, wind force grade, weather type, and season type over the course of a year can be obtained, which is shown in the following Equation 1:

number

[0052] In the fitting process of the linear regression equation, the time period, for example, day, month, season, year, can be set, or the number of days can be set by the user, and the shorter the set period, the higher the accuracy, and the weight prediction value g (argument observation value) needs to be defined based on the set time period, and if the time period is day, g indicates the amount of marine litter collected in a day in the fitting process, and if the time period is month, g indicates the amount of marine litter collected in a month in the fitting process. Similarly, the time period of the actual reported value of the service site should also match the time period of the weight prediction value.

[0053] According to the above linear regression equation, various influencing factors can be integrated, while classification can be performed according to differences in collection scenes, and the accuracy of the weight prediction result can be ensured.

[0054] (3) Calculate the weight comparison value based on the correction coefficient using the following formula 2:

number

[0055] When calculating the weight comparison value, the weight comparison value w={sre i1 ,sre i2 ,sre i3}, among which, sre i1 indicates the weight comparison value during the busy period, and sre i2 indicates the weight comparison value during normal period, and sre i3 indicates the weight comparison value during the off-season, In (4), it is determined whether the absolute value of the weight comparison value in the actual section is greater than the threshold value. If the answer is YES, there is an abnormality in the weight data of marine litter at that service site. If the answer is NO, the weight data of marine litter at that service site is normal.

[0056] In this embodiment, the busy season is taken as an example, and the logical statement for determining the abnormal value G of the amount of collected marine plastic waste is shown in the following formula 3:

number

[0057] In one specific implementation of the present invention, the process of marine litter from the collection end to the disposal end is shown in FIG. 6, and includes the following steps S31 to S33.

[0058] In step S31, the collection end uploads weight information of the collected marine plastic and evidence package to the cloud management platform and sends a transfer request.

[0059] In step S32, if the cloud management platform passes the check, it assigns a transport vehicle to carry out the transfer operation and transport it to the storage end.

[0060] In step S33, the storage end sends a transfer request to the cloud management platform, and if the cloud management platform passes the check, it assigns a transport vehicle to carry out the transfer operation, and transports it to the disposal end for granulation and recycling.

[0061] In the above-mentioned transfer process of marine plastic waste, the cloud management platform generates and seals electronic documents for each service site, and refers to steps S11 to S15 and steps S21 to S25 in the above-mentioned embodiment. Similarly, the cloud management platform checks each transfer request through a blacklist / whitelist mechanism based on a credit evaluation model.

[0062] Finally, it should be noted that the above examples are merely for illustrating the technical solutions of the present invention, and are not intended to limit the same. Although the present invention has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present invention may still be modified or substituted with equivalents, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A marine plastic waste electronic ledger management system based on blockchain technology, comprising: a cloud management platform located at a central node of the blockchain; and a service site located at the remaining nodes of the blockchain, the service site including a marine waste collection end, a marine waste transport relay end, a marine waste accumulation end, a marine waste transport end, and a marine waste disposal end, the marine waste collection end, the marine waste transport relay end, and the marine waste accumulation end issuing a marine waste transfer order request to the cloud management platform in a smart contract manner; The cloud management platform is for monitoring and managing the marine debris transfer process between each service site, checking the electronic identity card of the service site that issues the marine debris transfer order request through a blacklist / whitelist mechanism, calling up the corresponding service site data to check the service site through a credit evaluation model if the electronic identity card is beyond the validity period, and updating the status and validity period of the electronic identity card according to the checking result, rejecting the marine debris transfer order request of the service site if the electronic identity card is on the blacklist, and broadcasting the marine debris transfer order request of the service site to the marine debris transport end, which receives a control command from the cloud management platform to transport the marine debris from the marine debris collection end to the marine debris transport relay end or the marine debris accumulation end, or transporting the marine debris from the marine debris transport relay end to the marine debris accumulation end or the marine debris disposal end, or transporting the marine debris from the marine debris accumulation end to the marine debris disposal end; The credit evaluation model is represented as I=[C, G, Z, H], C indicates the number of violations by the worker, G indicates the abnormal amount of collected marine plastic waste, Z indicates the number of transfer order requests, and H indicates the transfer amount. If the output result of any one of the items of the credit evaluation model is abnormal, the cloud management platform puts the electronic identity card of the service site that issues the marine waste transfer order request on the blacklist; if the output results of all items of the credit evaluation model are normal, the cloud management platform puts the electronic identity card of the service site that issues the marine waste transfer order request on the whitelist; a validity period is set for the electronic identity card information; and electronic identity card information that exceeds the validity period is removed from the blacklist / whitelist; The method for determining an abnormal value of the amount of collected marine plastic waste includes the following steps (1) to (4): In the step (1), historical sample data of the service site in three different sections, i.e., off-season, normal season, and busy season, is obtained, and a weight prediction value of the sample data in different sections is calculated; In the step (2), a correction factor is calculated based on the weight prediction value of the sample data and the actual reported value of the service site; In the step (3), the weight comparison value sre of each historical sample data is calculated based on the correction coefficient. ｉ is calculated according to the following formula 2: [0025] 【number】 denotes the correction coefficient of the i-th historical sample data, t denotes the design matrix consisting of the historical sample data, and x ２ denotes the mean square error of the historical sample data, t' denotes the transpose of t, When calculating the weight comparison value, the weight comparison value w in different intervals is calculated based on the historical sample data of the off-season, normal season, and busy season. ｉ１ , sre ｉ２ , sre ｉ３ }, and sre ｉ１ indicates the weight comparison value during the busy period, and sre ｉ２ indicates the weight comparison value during the normal period, and sre ｉ３ indicates the weight comparison value during the off-season, In the step (4), it is determined whether the absolute value of the weight comparison value in the actual section is greater than the threshold value. If the result is YES, there is an abnormality in the weight data of the marine litter at the service site. If the result is NO, the weight data of the marine litter at the service site is normal. An electronic document management system for marine plastic waste based on blockchain technology.

2. The method of arranging service sites in blockchain nodes includes the following: The marine debris collection terminal is located at the first node of the blockchain, and is for collecting marine debris and uploading the evidence package to the cloud management platform; The marine litter transport relay point will be placed on the third node of the blockchain and will be designated as a marine litter transport relay storage point. The marine debris dump is placed on the fourth node of the blockchain and is designated as a target dump for marine debris; The marine debris transport end is located at the second node of the blockchain, and is for receiving control instructions from the cloud management platform and transferring marine debris accordingly; The marine waste disposal end will be located at the fifth node of the blockchain and will be used to dispose of marine waste. The marine plastic waste electronic document management system based on the blockchain technology described in claim 1.

3. Specifically, the provision of pre-compiled smart contracts at the lowest layer of the blockchain includes: The first node sends a transfer order request to the central node, the central node checks the electronic identity card information of the first node, and if the check is passed, the central node broadcasts the received transfer order to the second node; after the second node receives the transfer order, the central node selects the third node or the fourth node as the target service site of the transfer order, and the central node generates and seals an electronic document for the first node; The third node or the fourth node sends a transfer order request to the central node, the central node checks the electronic identity card information of the third node or the fourth node, if the check is passed, the central node broadcasts the received transfer order to the second node, after the second node receives the transfer order, the central node selects the fourth node or the fifth node as the target service site of the transfer order, the central node generates and seals the electronic document of the third node or the fourth node; After the transfer vehicle arrives at the target service site, the target service site checks the electronic document and the transfer vehicle information of the previous node, and if the check is passed, it accepts the transfer object; if the target service site is the fifth node, the central node generates and seals the electronic document of the fifth node, and archives all the transfer order completion progress status corresponding to the transfer object in the first node; In the transfer process, the electronic document corresponding to the transfer order and the vehicle information for transfer are synchronized to the target service site node by the central node, so that the next node can check only the electronic document of the previous node to compare the electronic document of the previous node with the electronic document of the current node, and the central node can check the electronic documents of all nodes. The marine plastic waste electronic document management system based on the blockchain technology described in claim 2.

4. The information in the evidence package includes basic information of the worker, the name and coordinate location of the marine litter collection point, collection point, collection time, video footage of the collection process, and the type and weight data of marine litter plastic. The marine plastic waste electronic document management system based on the blockchain technology described in claim 2.

5. The weight prediction value is obtained by calculating a linear regression equation model, and the arguments of the linear regression equation model include tide level, wind force grade, weather type, and season type. The marine plastic waste electronic document management system based on the blockchain technology described in claim 1.

6. In the credit evaluation model, a threshold judgment method is used for the number of violations, the number of transfer order requests, and the transfer amount of an operator. The number of violations of an operator that exceeds the threshold, and the number of transfer order requests or the transfer amount that is lower than the threshold are summarized as abnormal. The marine plastic waste electronic document management system based on the blockchain technology described in claim 1.

7. The initial digital IDs of all service sites placed on the blockchain node are normal and are whitelisted. The marine plastic waste electronic document management system based on the blockchain technology described in claim 1.

8. The transfer vehicles at the marine debris transport end are all equipped with on-board monitoring and on-board positioning devices. The marine plastic waste electronic document management system based on the blockchain technology described in claim 1.

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