Electrical circuit logic dynamic simulation system based on DF4D railway locomotive

Abstract

The invention discloses an electrical circuit logic dynamic simulation system based on a DF4D railway locomotive, and relates to the technical field of railway locomotive maintenance training, and the electrical circuit logic dynamic simulation system comprises a circuit schematic diagram simulation module, a gas circuit schematic diagram simulation module, a data interaction module, a fault injection module and an intelligent diagnosis module, and the schematic circuit diagram simulation module is used for constructing an interactive interface matched with a DF4D locomotive electrical circuit schematic diagram in a ratio of 1: 1 by adopting a vector graphic technology, dynamically identifying power-on and power-off states of circuit elements through colors, and responding to an external operation signal in real time. According to the invention, the transformation of maintenance training from subjective evaluation to quantitative evaluation is realized. The fault positioning time, operation steps and parameter judgment results of students are recorded in real time, accurate comparison is performed in combination with a standard process library, objective scores are generated from three dimensions of positioning accuracy, step integrity and parameter precision, the students are helped to clearly know own weak links, and the fault positioning accuracy is improved. Powerful support is provided for cultivating high-quality DF4D locomotive maintenance personnel in a railway locomotive depot.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of railway locomotive maintenance training, in particular to an electrical circuit logic dynamic simulation system based on DF4D railway locomotive. BACKGROUND

[0002] In the field of railway locomotive maintenance training, fault diagnosis of the circuit and air circuit system is one of the core skills, especially for DF4D diesel locomotive, its circuit includes main circuit, control circuit, auxiliary circuit and other multi-level circuits, and the air circuit system takes JZ-7 brake as the core, involving complex pressure transmission and valve action logic, which puts forward high requirements for the principle understanding and operation ability of maintenance personnel. In traditional training, students mainly rely on static paper principle diagram or two-dimensional electronic drawing for learning, which has significant limitations: on the one hand, static drawing cannot directly show the dynamic correlation of "operation and state change", for example, it cannot show the cause and effect relationship between "brake handle movement" and "air circuit pressure gradient change" and "valve component action", which leads to low efficiency of students' understanding of abstract principles, and often needs a lot of real vehicle observation to establish cognition; on the other hand, static drawing lacks the simulation ability of fault scene, students cannot predict the system state characteristics when faults such as "pipe leakage" and "contact adhesion" occur, and can only rely on the teacher's oral instruction or accident case records, which leads to slow accumulation of fault diagnosis experience.

[0003] With the application of virtual simulation technology in the field of training, some systems have begun to try to present the circuit and air circuit principle diagram digitally, but the existing technology still has obvious shortcomings: first, the dynamic response ability is weak, most systems can only realize the state switching of single component, such as the color change of "power on / power off", and cannot simulate the time sequence logic of current flow in the circuit or the gradient change of pressure transmission in the air circuit, which has poor dynamic correlation with real vehicle operation; second, the fault simulation and diagnosis closed loop is missing, although the fault state can be preset, there is no accurate record and quantitative evaluation of the student's troubleshooting process, for example, it cannot judge the efficiency of the student's positioning fault point, the standardization of operation steps and the accuracy of parameter judgment, which leads to the dependence of training effect on artificial subjective evaluation, and the non-uniformity of standards and the lag of feedback; third, the algorithm support is insufficient, the existing scoring mechanism is mainly based on the simple judgment of "whether the fault point is found", without establishing a multi-dimensional and quantifiable scoring model, which is difficult to objectively reflect the comprehensive diagnostic ability of students, and also cannot optimize the training focus through data accumulation. These problems lead to the fact that the existing simulation system cannot meet the fine and standardized needs of DF4D locomotive circuit and air circuit maintenance training, and a diagnosis module integrating dynamic simulation, intelligent recording and multi-dimensional scoring algorithm is needed to improve the training quality and efficiency. SUMMARY

[0004] To address the problems in related technologies, this invention proposes an electrical circuit logic dynamic simulation system based on the DF4D railway locomotive, in order to overcome the aforementioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows: An electrical circuit logic dynamic simulation system based on a DF4D railway locomotive includes: a circuit schematic simulation module, an air circuit schematic simulation module, a data interaction module, a fault injection module, and an intelligent diagnosis module, wherein; The circuit schematic simulation module is used to construct the electrical circuit schematic of the DF4D locomotive using vector graphics technology. Figure 1 A matching interactive interface is provided, and the power-on and power-off status of circuit components is dynamically indicated by color, responding to external operation signals in real time. The air circuit schematic simulation module is used to model the structure of the JZ-7 brake machine. It simulates the on / off state of the air circuit, the action process of valve components and the changes in pipeline pressure under different working conditions through fluid dynamics algorithms. It synchronously displays the pressure gauge values ​​and uses dynamic pressure field rendering technology to show the change process of pipeline pressure from 0 kPa to 900 kPa through color gradient. The data interaction module is used to establish a real-time data transmission link with the simulated driving console and the virtual vehicle system, receive operation instructions and feed back simulation status data. The fault injection module is used to support instructors in preset circuit faults and air circuit faults. After being triggered, it automatically changes the simulation state of the corresponding circuit and generates fault characteristic parameters. The intelligent diagnostic module is used to record the trainee's troubleshooting operations and calculate a comprehensive score based on a three-dimensional scoring model by comparing the results with the standard handling procedures in the preset standard handling procedure library.

[0006] Furthermore, the circuit schematic simulation module includes a component attribute database for storing the rated parameters, operating logic, and fault characteristics of each electrical component, and automatically adjusting the state response rules of the component when a fault is injected.

[0007] Furthermore, the electrical components include relays, contactors, and fuses; the component attribute database stores rated parameters, including rated voltage and operating current; the operating logic includes energized engagement logic and de-energized release logic; the fault characteristics include circuit state characteristics during open circuit and abnormal current characteristics during short circuit.

[0008] Furthermore, the operating conditions include service braking, emergency braking, and release; the valve components include distribution valves, actuating valves, and relay valves; and the pipeline pressure changes include the pressure transmission process of the equalizing cylinder, the braking cylinder, and the main cylinder.

[0009] Furthermore, the circuit fault types of the fault injection module include at least wire breakage, contact adhesion, and fuse blowing; and the air circuit fault types include at least pipeline leakage, valve jamming, and air cylinder blockage, and it supports setting the fault location and characteristic parameter thresholds through a visual interface.

[0010] Furthermore, the calculation of the comprehensive score based on the three-dimensional scoring model includes: obtaining the fault location accuracy score A, obtaining the operation step completeness score B, and obtaining the parameter judgment accuracy score C, and calculating the comprehensive score, expressed as: ; Where S is the overall score. These are the weighting coefficients.

[0011] Furthermore, to obtain the fault location accuracy score A, the following steps are included: Pre-calibrate the student's actual positioning time T in real time a This represents the time from the occurrence of the fault to the confirmation of the fault location; standard location time T. s , represents the baseline value trained based on expert data; D is the straight-line distance D between the i-th misjudged point and the correct fault point. i This indicates the maximum possible misjudgment distance D based on the schematic diagram coordinates. m And the number of misjudgments, n; Perform timeout penalty judgment, including: if If the penalty is P1=30, then 30 points will be deducted; otherwise, P1=0. The location time score is calculated and expressed as follows: ; The misjudgment distance score is calculated and represented as follows: ; The final location score is obtained, represented as the fault location accuracy score A, which is expressed as: .

[0012] Furthermore, to obtain the completeness score B for the operational steps, the following steps are included: Pre-determine the number of steps to be executed correctly. Total number of steps in the standard process Such as the "seven-step gate" test Length of the longest consecutive correct step chain Number of missing critical steps ; The score for the correctness of the calculation steps is expressed as follows: ; The score for the continuity of steps is calculated and expressed as follows: ; The penalty for missing a critical step is represented as follows: ; The final step score, i.e., the completeness score of the operation steps (B), is obtained as follows: .

[0013] Furthermore, obtaining the parameter judgment accuracy score C includes the following steps: Pre-calibrate the i-th parameter value for the student's judgment. The standard value of the i-th parameter The normal threshold range of the i-th parameter ; Parameter importance coefficient Key parameter K i =0.6, minor parameter K i =0.3; Total number of parameters: m; The deviation of a single parameter is calculated and expressed as: ; The penalty for exceeding the calibrated safety threshold is expressed as: if or If so, the penalty item P3=20 is triggered, meaning 20 points are deducted; otherwise, P3=0. The final parameter score, which is the parameter judgment accuracy score C, is obtained and represented as: .

[0014] The beneficial effects of this invention are: This invention, through a dynamic simulation system of circuit and pneumatic circuit logic diagrams and a matching intelligent diagnostic module, fundamentally solves the core pain points of traditional maintenance training, such as the difficulty in understanding abstract principles, high risks in fault simulation, and inconsistent assessment standards. It provides a systematic solution for the circuit and pneumatic circuit maintenance training of the DF4D locomotive. The system utilizes vector modeling and dynamic visualization technology to transform static drawings into interactive dynamic scenes. Its circuit module uses color changes and current flow animations to intuitively present the causal relationship between operation and component states; the pneumatic circuit module uses pressure gradient rendering and valve action animations to clearly demonstrate the complete logic of pressure transmission and braking execution, helping trainees quickly establish a connection between abstract principles and concrete processes, significantly lowering the understanding threshold of principle learning and reducing reliance on repeated real-vehicle observation. Simultaneously, the fault injection module supports simulating various typical faults such as circuit open circuits and pneumatic leaks without the risk of real-vehicle operation. Trainees can repeatedly practice fault diagnosis procedures in a safe environment, gradually accumulating diagnostic experience and effectively shortening the skills training cycle.

[0015] Meanwhile, the multi-dimensional scoring algorithm of the intelligent diagnostic module realizes the transformation of maintenance training from subjective evaluation to quantitative assessment. By recording the trainee's fault location time, operation steps, and parameter judgment results in real time, and comparing them with the standard process library, an objective score is generated from three dimensions: location accuracy, step completeness, and parameter precision, helping trainees identify their weaknesses. At the same time, the system automatically stores training data, forming skill files for individuals and teams. Instructors can review the data to accurately identify common problems in trainees' handling of circuit or pneumatic faults, and adjust the training focus accordingly, achieving individualized instruction and providing strong support for cultivating high-quality DF4D locomotive maintenance personnel for railway locomotive depots. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a dynamic simulation system for electrical circuit logic based on a DF4D railway locomotive according to an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0019] According to an embodiment of the present invention, an electrical circuit logic dynamic simulation system based on a DF4D railway locomotive is provided.

[0020] like Figure 1 As shown, the electrical circuit logic dynamic simulation system based on the DF4D railway locomotive according to an embodiment of the present invention includes: a circuit schematic simulation module 1, an air circuit schematic simulation module 2, a data interaction module 3, a fault injection module 4, and an intelligent diagnosis module 5. The modules work together to realize dynamic simulation and training functions.

[0021] The circuit schematic simulation module 1 uses a vector graphics engine to construct a digital model that is completely consistent with the electrical circuit schematic of the DF4D locomotive, including the entire system circuits such as the main circuit, control circuit, and auxiliary circuit. It supports mouse dragging for stepless zooming and panning, ensuring a clear display of local details and overall logic. Simultaneously, it has a built-in component attribute database that stores parameters such as rated voltage, operating current, and number of contacts for over 120 types of electrical components, including contactors, relays, and fuses, as well as action logic such as "energized engagement and de-energized release." The module displays component status changes in real time by switching between red (representing energization) and white (representing de-energization). For example, when a student operates the "diesel engine start" button, the relay coil in the start control circuit turns red, indicating energization, and the corresponding contacts synchronously switch states, triggering subsequent circuit actions.

[0022] The pneumatic circuit schematic simulation module 2 is used to establish a pneumatic circuit simulation model for the JZ-7 air brake based on fluid dynamics equations. It covers core components such as the equalizing cylinder, brake cylinder, relay valve, and distribution valve, as well as connecting pipelines. Through dynamic pressure field rendering technology, a gradient color from blue (representing low pressure) to red (representing high pressure) visually displays pressure changes within the pipeline. The pressure data sampling frequency is 10Hz to ensure smooth dynamic response. Simultaneously, a virtual pressure gauge is displayed, and the pipeline color changes synchronously with the pressure gauge pointer during braking operations. Furthermore, 3D animation demonstrates the microscopic processes such as the switching of internal pathways in the distribution valve and piston movement, helping to understand the complete logic from handle operation to pressure transmission and braking execution.

[0023] The data interaction module 3 uses the UDP protocol to establish a bidirectional data link with the simulated driving console and the virtual machine vehicle system. This ensures real-time synchronization between the student's operations and changes in the schematic diagram's status. For example, when the "lighting switch" on the console is turned on, the corresponding lighting circuit in the schematic diagram immediately turns red and is fed back to the virtual machine vehicle system to illuminate the lights. The transmitted content includes: Input signals: control panel switch status, button operation, brake lever position, etc.; Output signals: circuit component status, air pressure data, fault alarm information, etc.

[0024] Among them, fault injection module 4 is used to provide a visual fault setting interface, where instructors can select the fault type and characteristic parameters of the location of occurrence, as follows: Circuit faults include several typical types of faults such as open wires (indicating the circuit turns white and cannot be energized), stuck contacts (indicating the component is forcibly kept energized), and blown fuses (indicating the circuit is interrupted and displaying a blown indicator); gas circuit faults include several typical types of faults such as pipeline leaks (indicating an abnormal decrease in pressure gradient), stuck valves (indicating incomplete operation and abnormal pressure curve), and blocked air cylinders (indicating no pressure change).

[0025] After a fault is injected, the system automatically changes the simulation logic of the corresponding circuit. For example, after setting a "brake cylinder pipeline leakage" fault, the color gradient of the corresponding pipeline in the air circuit diagram decreases faster, the pressure gauge shows that the pressure cannot reach the standard value, and triggers the brake failure alarm of the virtual vehicle system.

[0026] The intelligent diagnostic module 5 is used to record the trainee's troubleshooting operations in real time, including the components clicked, the parameters adjusted, and the repair actions performed. By comparing the results with the built-in preset standard handling procedures, a comprehensive score is calculated, which specifically includes the following steps: To obtain the fault location accuracy score A, the following steps are included: Pre-calibrate the student's actual positioning time T in real time a This represents the time from the occurrence of the fault to the confirmation of the fault location; standard location time T. s , represents the baseline value trained based on expert data; D is the straight-line distance D between the i-th misjudged point and the correct fault point. i This indicates the maximum possible misjudgment distance D based on the schematic diagram coordinates. m And the number of misjudgments, n; Perform timeout penalty judgment, including: if If the penalty is P1=30, then 30 points will be deducted; otherwise, P1=0. The location time score is calculated and expressed as follows: ; The misjudgment distance score is calculated and represented as follows: ; The final location score is obtained, represented as the fault location accuracy score A, which is expressed as: .

[0027] To obtain an operation procedure completeness score of B, the following steps are included: Pre-determine the number of steps to be executed correctly. Total number of steps in the standard process Such as the "seven-step gate" test Length of the longest consecutive correct step chain Number of missing critical steps .

[0028] The score for the correctness of the calculation steps is expressed as follows: ; The score for the continuity of steps is calculated and expressed as follows: ; The penalty for missing a critical step is represented as follows: ; The final step score, i.e., the completeness score of the operation steps (B), is obtained as follows: .

[0029] To obtain the parameter judgment accuracy score C, the following steps are included: Pre-calibrate the i-th parameter value for the student's judgment. The standard value of the i-th parameter The normal threshold range of the i-th parameter ; Parameter importance coefficient Key parameter K i =0.6, minor parameter K i =0.3; Total number of parameters: m; The deviation of a single parameter is calculated and expressed as: ; The penalty for exceeding the calibrated safety threshold is expressed as: if or If so, the penalty item P3=20 is triggered, meaning 20 points are deducted; otherwise, P3=0. The final parameter score, which is the parameter judgment accuracy score C, is obtained and represented as: ; The overall score is calculated and expressed as follows: ; Where S is the overall score, and its value is 0≤S≤100; The weighting coefficients are 0.3, 0.4, and 0.3 respectively; A is the fault location accuracy score, with a value of 0≤A≤100; B is the operation procedure integrity score, with a value of 0≤B≤100; C is the parameter judgment accuracy score, with a value of 0≤C≤100.

[0030] Specifically, during the implementation of this technical solution, a scoring report can be generated through comprehensive scores, and the fault types, handling processes and scoring data of each training session can be automatically stored to form an individual or team capability analysis report to help optimize training focus.

[0031] In summary, by employing the above-described technical solution of the present invention, the following effects can be achieved: This invention, through a dynamic simulation system of circuit and pneumatic circuit logic diagrams and a matching intelligent diagnostic module, fundamentally solves the core pain points of traditional maintenance training, such as the difficulty in understanding abstract principles, high risks in fault simulation, and inconsistent assessment standards. It provides a systematic solution for the circuit and pneumatic circuit maintenance training of the DF4D locomotive. The system utilizes vector modeling and dynamic visualization technology to transform static drawings into interactive dynamic scenes. Its circuit module uses color changes and current flow animations to intuitively present the causal relationship between operation and component states; the pneumatic circuit module uses pressure gradient rendering and valve action animations to clearly demonstrate the complete logic of pressure transmission and braking execution, helping trainees quickly establish a connection between abstract principles and concrete processes, significantly lowering the understanding threshold of principle learning and reducing reliance on repeated real-vehicle observation. Simultaneously, the fault injection module supports simulating various typical faults such as circuit open circuits and pneumatic leaks without the risk of real-vehicle operation. Trainees can repeatedly practice fault diagnosis procedures in a safe environment, gradually accumulating diagnostic experience and effectively shortening the skills training cycle.

[0032] Meanwhile, the multi-dimensional scoring algorithm of the intelligent diagnostic module realizes the transformation of maintenance training from subjective evaluation to quantitative assessment. By recording the trainee's fault location time, operation steps, and parameter judgment results in real time, and comparing them with the standard process library, it generates an objective score from three dimensions: location accuracy, step completeness, and parameter precision, and automatically marks operation deviations. At the same time, the system automatically stores training data, forming skill files for individuals and teams. Instructors can review the data to accurately identify common problems in trainees' handling of circuit or air circuit faults, and adjust the training focus accordingly to achieve individualized teaching. This provides strong support for cultivating high-quality DF4D locomotive maintenance personnel for railway locomotive depots.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art, upon considering the disclosure in the specification and embodiments, will readily conceive of other embodiments of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0034] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A dynamic simulation system for electrical circuit logic based on a DF4D railway locomotive, characterized in that, include: The circuit schematic simulation module (1), the air circuit schematic simulation module (2), the data interaction module (3), the fault injection module (4), and the intelligent diagnosis module (5) are as follows; The circuit schematic simulation module (1) is used to construct an interactive interface that matches the electrical circuit schematic of the DF4D locomotive in a 1:1 ratio using vector graphics technology, and dynamically indicates the energized and de-energized states of circuit components by color, and responds to external operation signals in real time. The air circuit schematic simulation module (2) is used to model the structure of the JZ-7 type brake machine, simulate the on / off state of the air circuit, the action process of valve components and the change of pipeline pressure under different working conditions through fluid dynamics algorithm, synchronously associate the pressure instrument value display, and adopt pressure field dynamic rendering technology to display the change process of pipeline pressure from 0kPa to 900kPa through color gradient. The data interaction module (3) is used to establish a real-time data transmission link with the simulated driving console and the virtual vehicle system, receive operation instructions and feed back simulation status data; The fault injection module (4) is used to support instructors to preset circuit faults and air circuit faults. After being triggered, it automatically changes the simulation state of the corresponding circuit and generates fault characteristic parameters. The intelligent diagnostic module (5) is used to record the trainee's troubleshooting operations and calculate the comprehensive score based on the three-dimensional scoring model by comparing the standard handling procedures in the preset standard handling procedure library.

2. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 1, characterized in that, The circuit schematic simulation module (1) includes a component attribute database for storing the rated parameters, operating logic and fault characteristics of each electrical component, and automatically adjusting the state response rules of the component when a fault is injected.

3. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 2, characterized in that, The electrical components include relays, contactors, and fuses; The component attribute database stores the rated parameters, including rated voltage and operating current; the operating logic includes energized engagement logic and de-energized release logic; the fault characteristics include circuit state characteristics during open circuit and abnormal current characteristics during short circuit.

4. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 1, characterized in that, The operating conditions include service braking, emergency braking, and release; the valve components include distribution valves, actuating valves, and relay valves; the pipeline pressure changes include the pressure transmission process of the equalizing cylinder, braking cylinder, and main cylinder.

5. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 4, characterized in that, The circuit fault types of the fault injection module (4) include at least wire breakage, contact adhesion and fuse blowing; and the air circuit fault types include at least pipeline leakage, valve jamming and air cylinder blockage, and support setting the fault location and characteristic parameter threshold through a visual interface.

6. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 1, characterized in that, The calculation of the comprehensive score based on the three-dimensional scoring model includes: obtaining the fault location accuracy score A, obtaining the operation procedure completeness score B, and obtaining the parameter judgment accuracy score C, and calculating the comprehensive score, which is expressed as: ； Where S is the overall score. These are the weighting coefficients.

7. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 6, characterized in that, To obtain the fault location accuracy score A, the following steps are included: Pre-calibrate the student's actual positioning time T in real time a This represents the time from the occurrence of the fault to the confirmation of the fault location; standard location time T. s , represents the baseline value trained based on expert data; D is the straight-line distance D between the i-th misjudged point and the correct fault point. i This indicates the maximum possible misjudgment distance D based on the schematic diagram coordinates. m And the number of misjudgments, n; Perform timeout penalty judgment, including: if If the penalty is P1=30, then 30 points will be deducted; otherwise, P1=0. The location time score is calculated and expressed as follows: ； The misjudgment distance score is calculated and represented as follows: ； The final location score is obtained, represented as the fault location accuracy score A, which is expressed as: 。 8. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 7, characterized in that, To obtain an operation procedure completeness score of B, the following steps are included: Pre-determine the number of steps to be executed correctly. Total number of steps in the standard process Such as the "seven-step gate" test Length of the longest consecutive correct step chain Number of missing critical steps ; The score for the correctness of the calculation steps is expressed as follows: ； The score for the continuity of steps is calculated and expressed as follows: ； The penalty for missing a critical step is represented as follows: ； The final step score, i.e., the completeness score of the operation steps (B), is obtained as follows: 。 9. The electrical circuit logic dynamic simulation system based on DF4D railway locomotive according to claim 8, characterized in that, To obtain the parameter judgment accuracy score C, the following steps are included: Pre-calibrate the i-th parameter value for the student's judgment. The standard value of the i-th parameter The normal threshold range of the i-th parameter ; Parameter importance coefficient Total number of parameters: m; The deviation of a single parameter is calculated and expressed as: ； The penalty for exceeding the calibrated safety threshold is expressed as: if or If so, the penalty item P3=20 is triggered, meaning 20 points are deducted; otherwise, P3=0. The final parameter score, which is the parameter judgment accuracy score C, is obtained and represented as: 。

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