112results about How to "Clear logic" patented technology

The invention discloses an urban inland inundation rapid simulation method coupling an SWMM and an earth surface two-dimensional hydrodynamic model, and relates to the technical field of urban rainfall inland inundation numerical simulation. The method comprises the following steps: acquiring basic data, and constructing an SWMM model; simulating rainfall confluence and pipe network hydrodynamic process of a target area by using an SWMM model, and calculating overflow data of each pipe network node; constructing an earth surface two-dimensional hydrodynamic model; the pipe network node overflow data are corrected and input into the earth surface two-dimensional hydrodynamic model, and a simulation effect is obtained; verifying the simulation effect by using historical submerging data; and under the condition that the verification is passed, simulating and analyzing urban rainfall inland inundation results under different design rainfall conditions based on the SWMM model and the earth surface two-dimensional hydrodynamic model. The simulation precision and the simulation efficiency can be considered, and the method has the advantages of being simple, clear in logic, high in operability and high in simulation result precision.

The invention belongs to the technical field of network security, and particularly relates to a product object attribute change identification method, system and device, and a medium, the method comprises the following steps: pre-defining a user-defined annotation for marking a field needing to be verified; after the information of any product object is edited again, all edited first fields are obtained from the front end through a reflection mechanism, and all corresponding second fields are called from a database at the rear end; wherein the fields with the same attribute in the first field and the second field have the same annotation information; and for any first field, acquiring a field name corresponding to the first field by utilizing a reflection mechanism, indexing corresponding field values from all the second fields according to the field name, and identifying whether the fields of the product object are changed or not by checking the first field and the field values.

The invention discloses a forest fire danger grade forecasting method based on a subcompartment scale, and belongs to the technical field of forest fire prevention, the forest fire danger grade forecasting formula is P = (T + S) * M, P is a forest fire index; t is a combustible type index; s is a forest fire source index; m is the moisture content index of the fine dead combustible. The problems that existing forest fire risk prediction is low in fineness, low in precision and complex in prediction process are solved.

The invention discloses a weighted clustering constraint-based multi-constraint inversion method for transient electromagnetic data containing an induced polarization effect. The method comprises the steps of constructing a smooth constraint term of an inversion parameter model; generating an inversion parameter clustering constraint term according to the prior physical property information, a preset clustering ambiguity value and the number of clustering centers; presetting an initial inversion parameter clustering center, and presetting an initial clustering weighted value of each inversion parameter as 1; forming a multi-constraint inversion objective function by the data fitting item, the parameter model constraint item and the parameter clustering constraint item; and updating a parameter clustering membership degree, a clustering center and a clustering weighted value of each inversion parameter in inversion iteration, and substituting into the multi-constraint objective function. And solving an extreme value of the multi-constraint objective function, and performing inversion iteration to update each parameter model until inversion meets an iteration termination condition. The method has the advantages of being clear in logic, stable, reliable and the like, and has high practical application significance in the technical field of geophysical exploration.

The invention belongs to the technical field of road engineering roadbed treatment, and particularly relates to a riprap silt squeezing depth calculation method based on energy conservation. The calculation method comprises the following steps: S1, assuming a simplified calculation working condition, and respectively calculating gravitational potential energy of block stones and soil blocks by taking the block stones and wedge-shaped soil blocks at the lower part after the block stones enter a soil body as research objects; s2, calculating resistance work and buoyancy work of the block stone in water, side soil shear work of the block stone when the block stone moves in the sludge, and soil pressure and shear work of the soil block; s3, establishing a balance equation of the total potential energy and the total resistance acting; and S4, calculating the riprap silt squeezing depth according to the equation. According to the method, the problem of establishment of the balance equation in the overwater riprap process is solved by utilizing the principle of conservation of energy, the design difficulty of engineers and the extra workload of parameter valuing are effectively reduced on the basis of ensuring the calculation requirement, and the scheme decision-making efficiency is favorably improved.

The invention discloses an automatic news event extraction and combination system based on chapter-level text analysis, which is characterized in that text noise is cleaned and paragraphs are divided through a preprocessing module, and strong event candidates are screened by combining multi-modal conjoint analysis of picture titles and paragraph texts and utilizing semantic similarity calculation and named entity recognition technologies; a multi-task learning framework based on a Transform architecture is adopted to cooperatively extract elements such as time, places, figures, events, causes and passes, and the comprehensiveness and accuracy of event element extraction are improved; and the event similarity is calculated through a Bi-Encoder model, and the events are combined and sorted in combination with timestamps, so that an event chain with clear logic is generated. The system breaks through the limitation of existing sentence-level or paragraph-level analysis, remarkably improves the comprehensiveness, consistency and coherence of news event identification through chapter-level global context, data multi-mode combination and intelligent event chain construction, and has wide application value in the fields of news monitoring, public opinion analysis and the like.

The invention discloses a control method, system and device for vehicle external temperature display and a storage medium, and belongs to the technical field of automobiles, and the control method comprises the steps that 1, the state of an automobile ignition switch is judged, and if 0FF is converted to 0N, the step 2 is executed; 2, judging whether the temperature value acquired by the external temperature sensor is in a normal range or not, and if the temperature value is in the normal range, entering a step 3; thirdly, the water temperature of the engine is judged, if the water temperature is smaller than or equal to the temperature set value, the collected current temperature value is sent to an air conditioner controller, and the collected current temperature value serves as the temperature display value outside the automobile to be displayed; if the water temperature of the engine is larger than the set value, entering the fourth step; fourthly, the vehicle speed is judged, and if the vehicle speed is smaller than or equal to the vehicle speed limit value, the current temperature value collected in the third step serves as the vehicle exterior temperature display value to be displayed; and if the vehicle speed is larger than the vehicle speed limit value, the real-time temperature value collected by the external temperature sensor serves as the vehicle external temperature display value to be displayed. The method effectively avoids the problem of inaccurate external temperature under special working conditions.

The invention discloses an automatic test capacitor surge test control method and system, and the method comprises the steps: setting test parameters according to the surge current test requirements of a to-be-tested tantalum capacitor, carrying out the cyclic charging and discharging test of the surge of the tantalum capacitor according to the set parameters, and obtaining the test result of the surge of the tantalum capacitor. According to the invention, the test result can be rapidly and clearly obtained by carrying out cyclic charging and discharging test on the tantalum capacitor surge, the control process is simple and efficient, the logic is clear, stable and reliable, the main control module is used for control, the structure is stable, the control logic is simple, and the test result can be rapidly and clearly obtained.

The invention discloses a Chat-TTS model-based natural voice reading method and system, and relates to the technical field of voice reading, and the method comprises the steps: deploying a Chat-TTS model at a server side; a user uploads a novel text through a front-end browser and automatically divides the novel text into chapters and sections; the front-end browser uses WebSocket to transmit text data subjected to chapter division processing to a server side, and the server side uses a Chat-TTS model to convert a novel text into a PCM format audio file with specified duration; and the front-end browser plays the audio file in the PCM format by using Jessibuca.js, and keeps the synchronization of the novel content and the audio at the same time. The method and the device are used for converting the text into the audio, immersive reading experience can be brought to the user, and the audio caching duration can be adjusted according to requirements so as to meet the requirements of different users.

The invention discloses a Wreshark message analysis plug-in generation method and system, and relates to the technical field of computer networks, and the method comprises the steps: obtaining a designed protocol hierarchical relation graph; analyzing the protocol hierarchical relation graph by adopting a hierarchical relation graph analysis engine to obtain association and key contents of field values between hierarchies and in the layer, and analyzing a protocol design document by adopting a protocol design document engine to obtain a field set; taking the bit width of the data type in the Wireshark plug-in as a reference set, processing the bit width of a field according to a protocol field splitting algorithm, and marking the type and mask of the field to obtain a field set mask; building plug-in elements according to the field set masks; and generating a protocol analysis plug-in according to the hierarchical relation graph, the protocol design document and the plug-in element. According to the method, the plugin development threshold can be reduced, the problems of complexity and diversity of protocol design, uncertain fields and the like are solved, and the Wreshark message analysis plugin is efficiently, accurately and automatically generated.

The present invention discloses a method for automatically extracting non-stationary segments of a structural wind-induced vibration time series signal, comprising: using a method of cubic spline interpolation of the maximum value of a data segment of a given length to calculate the upper envelope of the vibration time series signal, using a Gaussian mixture model to fit the probability density distribution of the upper envelope data, defining the first-order single Gaussian distribution fitting parameter with the smallest mean in the Gaussian mixture model as a statistical characteristic parameter of the vibration signal stationary data, and calculating the critical value of the vibration stationary data when the cumulative distribution function is close to 1, intercepting the corresponding time data segment when the upper envelope data is continuously greater than the critical value from the vibration time series signal, and selecting the data segment with a length greater than a preset length and a maximum value greater than a preset value in the intercepted data segment as the effective result of the wind-induced vibration non-stationary segment. The method of the present invention realizes the automatic and rapid extraction of non-stationary segments of structural wind-induced vibration time series signals that is less dependent on the professional knowledge of relevant practitioners.

The invention discloses a domain model verification method and device and a processor. When the method provided by the embodiment of the invention is executed, firstly, whether the target domain model meets the verification condition for indicating the verification logic of the target domain model or not can be identified; and if the target domain model meets the verification condition, identifying a verification annotation which is marked on the target domain model in advance based on the business demand of the target domain model, and calling a unified verification logic corresponding to the target domain model based on the verification annotation. And performing logic verification on the target domain model based on the unified verification logic. According to the method, the verification process is simplified through the pre-marked annotation, so that a large amount of self-defined if... else logics are avoided. Through unified verification logic, the code quantity and complexity of verification are reduced, so that the verification process is more efficient and consistent. The combination of the verification condition and the verification annotation ensures that the domain model meets the business requirement and the logic rule in the verification process.

The utility model discloses an interactive hand clamping mechanism, which comprises an X-axis cross beam, an X-axis cross beam, an X-axis cross beam, a Y-axis cross beam, a Y-axis cross beam, a Y-axis cross beam and a Y-axis cross beam, the upper clamping hand module reciprocates along the X-axis cross beam in the upper clamping hand moving area; the upper clamping hand module comprises an upper clamping hand, an upper clamping hand X-axis translation seat and a Y-axis driving unit; the Y-axis driving unit drives the upper clamping hand to extend towards one side part of the X-axis cross beam to wait for materials and to retract to avoid one side part deviating from the X-axis cross beam; the lower clamping hand module reciprocates along the X-axis cross beam in the lower clamping hand moving area; the lower clamping hand module comprises a lower clamping hand, a lower clamping hand X-axis translation seat and a Z-axis driving unit for driving the lower clamping hand to move in the Z-axis direction relative to the lower clamping hand X-axis translation seat; and the Z-axis driving unit drives the lower clamping hand to ascend for material waiting and descend for avoiding. The structural compactness, the movement precision, the working stability and the structural reliability are improved.

This utility model relates to a portable clothes drying device, including an outer shell assembly, a heating air duct assembly, and an inner cover assembly. The outer shell assembly includes an upper shell main body and a front shell. The inner cover assembly is fixedly disposed within the upper shell main body and divides its internal space into a separate cloth cover storage compartment and a heating air duct assembly receiving compartment. The heating air duct assembly is housed within the heating air duct assembly receiving compartment, and its air outlet opens to the outside of the inner cover assembly. The cloth cover storage compartment is used to store the cloth cover. Through an innovative internal partition design, the core functional unit of the clothes dryer (heating air duct assembly) and the essential accessory (cloth cover) are integrated into a compact shell, solving the problem of the cloth cover being separate from the main unit in traditional portable clothes dryers, which is easily forgotten or lost, greatly improving the product's portability and user convenience.

The application relates to the field of industrial automation and discloses a data management method and system for laser galvanometer testing, the method comprising: acquiring multi-source error data such as temperature and vibration and performing standardization processing; clustering the data to identify a representative error mode; obtaining an association path of error causes through association rule mining; further extracting deep features to determine the priority of error sources; combining dynamic environment variables to perform simulation verification, generating an error cause model, and formulating an optimization decision rule set based on the model; and finally applying the rule set to adjust system control parameters. The application can realize effective fusion of multi-source heterogeneous error data and accurate tracing of error causes, thereby improving the positioning accuracy and operation stability of a laser galvanometer system.

This invention relates to the field of chip inspection technology, and more particularly to a chip non-destructive testing system based on embedded current scanning. The system includes a current scanning module, an information acquisition module, a data analysis module, an abnormal scanning region generation module, and a scanning path generation module. Instead of simply performing a higher-density secondary scan of the entire chip, this invention intelligently filters out abnormal scanning regions requiring special attention based on the initial scan results and calculates their scanning priority. This allows valuable inspection time and computing resources to be concentrated on the most suspicious and severe areas, avoiding unnecessary repeated scanning in normal areas. The system dynamically selects the optimal scanning path based on the regularity of the region shape; for example, parallel lines are used for regular regions, and radial lines are used for irregular regions. This makes the scanning path more closely match the geometric features of the defect, obtaining a more complete region characterization with fewer scanning points, resulting in higher path planning efficiency.

This invention discloses a rapid prediction method for rail rolling contact fatigue damage in the field of rail damage prediction technology. The method includes establishing a three-dimensional elastoplastic wheel-rail cyclic rolling contact finite element model, improving the cyclic plastic constitutive model, and simulating the stress-strain evolution of the rail. A rail stress-strain sample library is generated through parametric sampling and batch calculation. A Physically Constrained Generative Adversarial Network (PC-GAN) is constructed, embedding physical constraints such as contact force conservation and energy consistency into the loss function to achieve rapid and high-precision mapping from operating parameters to the stress-strain field. Based on the PC-AN prediction results, cumulative damage and fatigue life are calculated using an incremental multiaxial fatigue damage model, and a damage distribution map of the entire rail line is drawn, identifying high-risk sections. This invention deeply integrates physical modeling with intelligent algorithms, achieving an order-of-magnitude improvement in rail fatigue damage assessment efficiency while ensuring prediction accuracy, providing efficient and reliable technical support for rail life assessment and maintenance decisions across the entire rail line.

The invention discloses an SQL annotation generation method, a computer readable medium and electronic equipment, and the method comprises the steps: obtaining a table list in an initial statement, and loading a table structure corresponding to the table list; the table list refers to a list of table structures contained in the initial statement; expanding the initial statement based on the table structure to obtain a fully expanded field of the initial statement; performing grammar analysis on the fully-expanded field, and determining a sub-query list in the fully-expanded field; the sub-query is a query clause in a fully expanded field; according to the structure and the type of the sub-query, optimizing a field corresponding to the sub-query to obtain a statement to be annotated; adding corresponding annotation information to a target position of the to-be-annotated statement based on a table structure and a sub-query contained in the to-be-annotated statement; therefore, the readability of the code statement can be improved and the logic of the code statement is clearer by splitting the multilayer nested SQL initial statement, intelligently identifying the table and the sub-query to which the field in the statement belongs and adding the corresponding annotation information to the target position.

The invention provides a loan interest bearing method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining at least one piece of interest bearing detail information of a target loan in response to an interest settlement request or a repayment request of the target loan, the interest bearing detail information comprising an interest bearing principal, an interest bearing rate, a starting date, an ending date, interest to be considered and a state, the states comprise a normal state, an interest settlement state, a to-be-settled state and a settlement state; the interest bearing detail information is updated according to the interest bearing frequency; and based on one or more of the state, the interest bearing principal, the interest bearing and the interest bearing rate in the at least one piece of interest bearing detail information of the target loan, performing interest bearing processing in the interest settlement processing process of the target loan or interest bearing processing in the repayment processing process of the target loan. A detailed interest-bearing model is provided, detailed interest-bearing of loans is realized, and the problem that interest-bearing principal splitting cannot be carried out in a balance interest-bearing mode in related technologies is solved.

The invention discloses a vehicle path management and control method, electronic equipment and a computer readable storage medium, and the method comprises the steps: obtaining a to-be-issued initial path segment and a remaining path segment of a target vehicle in a target scene, determining a to-be-detected vehicle corresponding to the target vehicle in the target scene based on the remaining path segment, and sending the to-be-detected vehicle to the electronic equipment; acquiring a current path section issued by the to-be-tested vehicle and a subsequent path section which is not issued by the to-be-tested vehicle; obtaining at least one of a first collision test result between the remaining path segment and the current path segment and a second collision test result between the subsequent path segment and the end point of the initial path segment; controlling the initial path segment in the target scene based on the obtained collision test result; wherein, when any collision test result is no collision, the initial path segment is issued to the target scene. In this way, the vehicle scheduling efficiency can be improved.

This invention discloses a clothes drying rack drive reset system and reset method, including a control circuit, two winding reels synchronously driven by a lifting motor, and steel wire ropes extending from each winding reel to both sides. Each side of the winding reel is equipped with a slack trigger connected to the control circuit, and a tensioning device is provided between the slack trigger and the steering wheel. When the slack trigger detects that the passing steel wire rope is slack, it triggers a signal to the control circuit, which then controls the lifting motor to stop rotating and the drying rack to stop rising. When the control circuit receives a reset command, it controls the driver to drive the first rotating wheel seat to tighten the slack steel wire rope to a taut state. At this time, the slack trigger can trigger a signal to the control circuit to put the lifting motor in a standby state. After receiving a user's descent command, the control circuit controls the lifting motor to reverse and lower the drying rack. The structure is simple, the operation logic is clear, and it is easy for users to operate, facilitating subsequent maintenance.

The invention discloses a method and a system for taking materials from a rectangular tray by a gantry mechanism, which can accurately calculate the storage specification of the materials in the tray and the material taking parameters of the gantry mechanism to ensure that the material taking operation is accurate each time. The method is suitable for rectangular material trays of different specifications and numbers, and only relevant parameters need to be adjusted. The system adopts an instructed operation mode, so that the workload of code editing and equipment debugging is reduced, and the code logic is clear and easy to expand and maintain. Through programming and instruction control, automatic material taking of the gantry mechanism is achieved, and the production efficiency is improved. And meanwhile, the system records and resets the accumulated material taking frequency, and subsequent process control and data analysis are facilitated. In addition, the system avoids repeated calculation of X-axis and Y-axis coordinates, the overall efficiency is improved, and subsequent processing is simplified through a data set. According to the method and system, the position of the gantry mechanism can be accurately controlled, high-precision material taking is achieved, configuration is flexible, and the method and system are suitable for various application scenes.

The invention provides a gas leakage risk monitoring and early warning method considering a multi-accident coupling risk, and relates to the technical field of urban gas pipeline safety monitoring, and the method comprises the following steps: determining a multi-accident risk factor set related to gas leakage, the risk factors are divided into four categories of pipeline body factors, environmental factors, operation and maintenance management factors and multi-accident coupling factors; respectively calculating the subjective weight and the objective weight of each risk factor by adopting a combined weighting method combining an analytic hierarchy process and an entropy weight method to obtain a comprehensive weight; constructing a coupling effect strength model, calculating a coupling coefficient between different types of risk factors, and representing an amplification effect of multi-accident interaction on the gas leakage risk; according to the gas leakage risk monitoring system, the multi-accident coupling factor is introduced into the gas leakage risk monitoring system, the system covers the four risk factors of the pipeline body, the environment, the operation and maintenance management and the multi-accident coupling, and the problems that a traditional method is incomplete in risk coverage and neglects the coupling effect are solved.

The utility model relates to a train traction system power supply device in a non-power area, and belongs to the field of train power supply. The device is composed of a shell and components in the shell, the components in the shell comprise a charger, a battery, a power conversion device and a battery management system, and the charger is connected with the battery; the battery is connected with the power conversion device; and the battery management system is connected with the battery. Meanwhile, external assemblies such as universal wheels and a display screen are further arranged on the shell. The device provided by the utility model is convenient to operate, reduces the possibility that a connecting cable causes physical damage beside a rail, greatly reduces the operation steps during multi-track-crossing shunting, improves the shunting efficiency, and reduces the probability of accidents at the same time.

The invention discloses an air filtering and deodorizing system for livestock breeding, and relates to the technical field of air purification. The system comprises a box body and a fan for driving airflow, wherein a water curtain mechanism, a water vapor removing mechanism and a filter element layer are sequentially arranged in the box body along the airflow direction. The water curtain mechanism comprises a rotatable outer net cylinder and an inner filter cylinder capable of axially moving, a rotary driving assembly is matched with an axial driving assembly, a water curtain is formed in combination with a water supply assembly, and composite self-cleaning of rotary centrifugation, mutual friction, axial scraping and high-pressure water flushing is achieved. And the problem of wet curtain argillization and blockage caused by high-load dust meeting water is fundamentally solved. The water vapor removing mechanism is used for removing water in the air flow through a water absorbing piece capable of rotating and extruding and regenerating on line. According to the invention, continuous and efficient air filtration and deodorization are realized, and continuous and stable operation of the system under complex breeding working conditions is ensured.

The invention discloses a blade rotating speed debugging method and system for an automobile engine cylinder cover test, computer equipment and a storage medium. The method comprises the following steps that the blade rotating speed is collected; filtering and averaging the blade rotating speed data to obtain a rotating speed average value; carrying out interval recalibration on the processed rotating speed mean value data; and outputting and displaying the calibrated blade rotating speed. According to the invention, the rotation speed fluctuation in unit time can be reduced, invalid values in the blade rotation speed are filtered out, the rotation speed is calibrated in different intervals, the influence of the blade rotation speed fluctuation on the test result is eliminated to the greatest extent, and the output rotation speed precision is improved, so that the accuracy of the test result is improved.

This application relates to a joint estimation method for wireless communication delay and frequency offset based on hill-climbing fine search. The method includes: setting a time offset search range, a frequency offset search range, a coarse search step size, and a fine search step size based on prior information; generating a two-dimensional grid point set within the search range according to the coarse search step size; calculating the cost value of each grid point based on a cost function; taking the time offset and frequency offset corresponding to the maximum value as the coarse estimate; using the coarse estimate as the initial point, performing fine search iterations using hill-climbing; calculating the cost value of multiple candidate points in the neighborhood in each iteration, comparing and determining the update direction, and updating the current time offset and / or frequency offset; repeating the iteration until a preset exit condition is met, and outputting the final estimate. This application effectively solves the parameter coupling problem of traditional step-by-step estimation in NTN scenarios, while balancing search range and computational complexity, facilitating engineering implementation, and being applicable to various NTN systems and terminal forms.

The invention provides an industrial park innovation atmosphere evaluation method and system, and the method comprises the steps: carrying out the data preprocessing of an obtained initial historical live-action image set, and obtaining a target historical live-action image set; a multi-level industrial park innovation atmosphere evaluation system comprising a target layer, a criterion layer and an index layer is constructed, the target layer is used for defining an overall target of industrial park innovation atmosphere evaluation, and the criterion layer is used for disassembling the defined overall target of the target layer into two types of intermediate dimensions, namely visual feeling and element characteristics; the index layer is used for determining specific indexes with pertinence for each dimension of the criterion layer; scoring the target historical live-action image set according to the multi-level industrial park innovation atmosphere evaluation system to determine an evaluation criterion, and determining a core MLLM evaluation model according to the evaluation criterion; and based on the core MLLM evaluation model, establishing an automatic innovation atmosphere evaluation framework according to organic fusion of core driving subject identity definition, evaluation view and corresponding priority evaluation indexes.

The invention discloses a biological specimen interactive keyboard system of modular hardware and a working method thereof, the system is composed of three modules: a specimen integrated keyboard module adopts a special keycap to package an entity biological specimen, and the specimen is used as a physical interface capable of triggering interaction; the multi-modal image acquisition module is fixed above the keyboard through a mechanical bracket, integrates visible light and infrared imaging units, and accurately acquires the characteristics of a specimen; the local processing and interaction control module serves as an off-line intelligent center, a local resource library and a special processing circuit are arranged in the local processing and interaction control module, feature matching and information output are achieved, all the modules cooperatively work through physical connection (such as a USB interface and an HDMI interface), and an independent hardware assembly line is formed. The system has the advantages of high integration, off-line operation, natural and smooth interaction and high reliability, and is suitable for teaching, scientific research, exhibition and other scenes.

The application discloses a kind of network type flexible direct system virtual impedance coordination's adaptive current differential protection method, system, equipment and medium, it is related to flexible direct current transmission relay protection technical field.At present, in network type flexible direct system, the problem that sensitivity is insufficient due to the limited output current of converter station.This application includes synchronously collecting the current phasor of the protected line both ends and the effective value of converter station output current;According to the effective value of output current, the virtual resistance parameter of converter station control inner loop is adaptively adjusted;Based on virtual resistance parameter, the adaptive braking coefficient is calculated, so that the braking coefficient is inversely proportional to virtual resistance;Differential current and braking current are calculated, whether differential current is greater than the product of braking coefficient and braking current and action threshold value at the same time is judged, if meet, then determine intra-zone fault and trip.This technical scheme realizes the adaptive improvement of sensitivity at fault, reliable and no misoperation at normal time, without additional judgment link, fast response and easy to realize.