Method and system for identifying key components of hydrogen energy driven high-speed train system based on dependent network model

Abstract

The invention provides a hydrogen energy driven high-speed train system key component identification method and system based on a dependent network model, and belongs to the technical field of train system key component identification. A mechanical-electrical-information-gas-liquid dependent network model describing the train system is constructed; constructing topological attribute parameters of the components according to topological characteristics of the components in the network; constructing functional attribute parameters of the parts according to the physical attributes of the different parts; according to the topology and functional attributes of the components, the comprehensive importance degree of the components is formed, the dependent comprehensive importance degree of the components is provided by adopting an entropy weight method and considering the dependent relation between the components, and the key components of the hydrogen energy driven high-speed train system are identified according to the dependent comprehensive importance degree. According to the method, the dependency comprehensive importance degree of the components is provided by considering the dependency characteristic and adopting the entropy weight method, and a theoretical basis can be provided for key component identification of a hydrogen energy driven high-speed train system.

Description

Technical Field

[0001] The present invention relates to the technical field of train key component identification, and in particular to a method and system for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model. Background Art

[0002] As a clean energy, hydrogen produces only water as a combustion product without any pollutants, so it is regarded as an important way to achieve emission reduction in the transportation sector. The application of hydrogen energy in high-speed trains can significantly reduce carbon emissions during train operation and contribute to environmental protection in the transportation sector. However, compared with existing trains, hydrogen-driven high-speed trains are more complex in system components and structural design because they are powered by hydrogen. Once some key components fail, it will affect the running speed of the train at best, and cause serious losses to people’s property at worst. Therefore, research on the identification of key components is extremely important to ensure the efficient operation of hydrogen-driven high-speed trains. Summary of the invention

[0003] The object of the present invention is to provide a method and system for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, comprising:

[0006] Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system;

[0007] According to the topological properties in network theory, the node degree, betweenness, harmony closeness and PageRank value are calculated to obtain the topological importance of the component in the network;

[0008] According to the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed;

[0009] The comprehensive importance of components is calculated based on their topological importance and functional importance. The entropy weight method is used to calculate the comprehensive importance of component interdependence by considering the influence of interdependent edges between different networks. The key components in the hydrogen-powered high-speed train system are identified based on their comprehensive importance of interdependence.

[0010] As a further limitation of the first aspect of the present invention, components and their functional relationships are extracted from a hydrogen-powered high-speed train system; four network models, namely mechanical, electrical, information, and gas-liquid, are constructed according to the types of components and functional relationships; and for the same physical components in the four subnets, dependent edges between networks are added to construct a mechanical-electrical-information-gas-liquid dependent network model.

[0011] As a further limitation of the first aspect of the present invention, according to the classical topological measurement in complex network theory, node degree, betweenness, closeness and PageRank are selected as the measurement indicators of component topological attributes; the node degrees of all nodes in the four subnets are calculated. k , betweenness bc , closeness hcc and PageRank pr The value of; According to the four topological measures of the component, its topological importance is calculated.

[0012] As a further limitation of the first aspect of the present invention, for components in a mechanical network, the functional importance of components in the mechanical network is proposed based on the functional support; for components in an electrical network, Kirchhoff's law is used to calculate the power of the components, and the functional importance of components in the electrical network is proposed; for components in an information network, a data traffic model is used and approximated by betweenness, and the functional importance of components in the information network is proposed; for components in a gas-liquid network, the functional importance of components in the gas-liquid network is proposed based on the hydrogen or liquid flow rate flowing through the components.

[0013] As a further limitation of the first aspect of the present invention, the comprehensive importance of the components can be obtained through weight coefficients and the topological importance and functional importance of the components in the four networks; by considering the comprehensive importance and dependencies in the four networks, the measurement matrix of mechanical, electrical, information, and gas-liquid networks is constructed; and the entropy weight method is used to calculate the dependency measure of the components in the four subnets.

[0014] In a second aspect, the present invention provides a system for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, comprising:

[0015] A building module for constructing a mechanical-electrical-information-gas-liquid interdependent network model based on the components of a hydrogen-powered high-speed train system;

[0016] The first calculation module is used to calculate the node degree, betweenness, harmonic closeness and PageRank value according to the topological attributes in network theory, and obtain the topological importance of the component in the network;

[0017] The second calculation module is used to calculate the functional importance of components in the mechanical network, the electrical network, the information network, and the gas-liquid network according to the physical properties of the components in the mechanical network, the electrical network, the information network, and the gas-liquid network;

[0018] The third calculation module is used to calculate the comprehensive importance of the components according to the topological importance and functional importance of the components; by considering the influence of the dependent edges between different networks, the entropy weight method is used to calculate the comprehensive importance of component dependence;

[0019] The identification module is used to identify key components in the hydrogen-powered high-speed train system based on the interdependent comprehensive importance of the components.

[0020] In a third aspect, the present invention provides a non-transitory computer-readable storage medium, which is used to store computer instructions. When the computer instructions are executed by a processor, the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in the first aspect is implemented.

[0021] In a fourth aspect, the present invention provides a computer device comprising a memory and a processor, wherein the processor and the memory communicate with each other, the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in the first aspect.

[0022] In a fifth aspect, the present invention provides an electronic device, comprising: a processor, a memory and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory so that the electronic device executes instructions for implementing the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in the first aspect.

[0023] The beneficial effects of the present invention are as follows: in view of the characteristics of the components of the previous hydrogen-powered high-speed train system, a four-layer interdependent network model of mechanical, electrical, information and gas-liquid is constructed; based on the classic complex network topology measurement and the physical meaning of the components, a method for calculating the comprehensive importance of the components is provided, and by considering the interdependent characteristics and adopting the entropy weight method, the interdependent comprehensive importance of the components is proposed, which can provide a theoretical basis for the identification of key components of the hydrogen-powered high-speed train system.

[0024] Additional advantages of the present invention will be more clearly given in the following description or learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 This is a flow chart of the steps for identifying key components of a hydrogen-powered high-speed train system according to an embodiment of the present invention.

[0027] Figure 2 This is a diagram of the mechanical network topology described in an embodiment of the present invention.

[0028] Figure 3 This is a diagram of the electrical network topology described in an embodiment of the present invention.

[0029] Figure 4 This is a diagram of the information network topology described in an embodiment of the present invention.

[0030] Figure 5 This is a gas-liquid network topology diagram described in an embodiment of the present invention.

[0031] Figure 6 Schematic diagram of node interdependence measurement values ​​in mechanical, electrical, information, and gas-liquid networks according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0033] It should be understood by those skilled in the art that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs.

[0034] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0035] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. Different embodiments or examples described in this specification and features of different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

[0037] To facilitate understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0038] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0039] Example 1

[0040] In this embodiment 1, a key component identification system of a hydrogen-powered high-speed train system based on a dependent network model is first provided, including: a construction module, which is used to construct a mechanical-electrical-information-gas-liquid dependent network model according to the components of the hydrogen-powered high-speed train system; a first calculation module, which is used to calculate the node degree, betweenness, harmonic closeness and PageRank value according to the topological properties in the network theory, and obtain the topological importance of the component in the network; a second calculation module, which is used to calculate the functional importance of the component in the mechanical network, electrical network, information network, and gas-liquid network according to the physical properties of the component in the mechanical network, electrical network, information network, and gas-liquid network; a third calculation module, which is used to calculate the comprehensive importance of the component based on the topological importance and functional importance of the component; by considering the influence of the dependent edges between different networks, the entropy weight method is used to calculate the comprehensive importance of component dependence; an identification module, which is used to identify the key components in the hydrogen-powered high-speed train system according to the comprehensive importance of component dependence.

[0041] In this embodiment, the above-mentioned system is used to implement a method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, including: S1 constructing a mechanical-electrical-information-gas-liquid dependent network model according to the components of the hydrogen-powered high-speed train system; S2 calculating the node degree, betweenness, harmonic closeness and PageRank value according to the topological properties in the network theory, and obtaining the topological importance of the components in the network; S3 proposing the functional importance of the above four components according to the physical properties of the components in the mechanical network, electrical network, information network and gas-liquid network; S4 calculating the comprehensive importance of the components based on the topological importance and functional importance of the components; by considering the influence of the dependent edges between different networks, the entropy weight method is used to calculate the comprehensive importance of component dependence; based on the comprehensive importance of component dependence, the key components in the hydrogen-powered high-speed train system are identified.

[0042] The step S1 includes the following steps: S11 extracts components and their functional relationships from the hydrogen-powered high-speed train system; S12 constructs four network models of mechanical, electrical, information, and gas-liquid respectively according to the types of components and functional relationships; S13 adds dependent edges between networks for the same physical components in the four subnets, thereby constructing a mechanical-electrical-information-gas-liquid dependent network model.

[0043] The step S2 comprises the following steps: S21 selects node degree, betweenness, closeness and PageRank as the measurement index of the component topological attribute according to the classical topological measurement in complex network theory; S22 calculates the node degree k, betweenness bc, closeness hcc and PageRankpr of all nodes in the four subnets; S23 calculates the topological importance m of the component according to the four topological measurements. t ;

[0044] The step S3 comprises the following steps: S31 proposes the functional importance d of the components in the mechanical network based on the functional support degree for the components in the mechanical network. out ; S32 For the components in the electrical network, Kirchhoff's law is used to calculate the power of the components, and the functional importance L of the components in the electrical network is proposed p ; S33 For the components in the information network, the data traffic model is used and approximated by betweenness, and the functional importance L of the components in the information network is proposed t ; S34 For the components in the gas-liquid network, based on the hydrogen or liquid flow through the components, the functional importance L of the components in the gas-liquid network is proposed g ;

[0045] The step S4 includes the following steps: S41, by using the weight coefficient λ and the topological importance and functional importance of the components in the four networks, the comprehensive importance m of the components can be obtained. c; S42 constructs the measurement matrix B of mechanical, electrical, information, and gas-liquid networks by considering the comprehensive importance and interdependence of the four networks M , B E , B C , B G ; S43 uses the entropy weight method to calculate the dependency measure of the components in the four subnets

[0046] Example 2

[0047] like Figures 1 to 6 As shown, in this embodiment 2, a method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model is provided, comprising the following steps:

[0048] (1) Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system;

[0049] (2) According to the topological attributes of the component in the network, its node degree, betweenness, harmonic closeness and PageRank value are calculated to obtain the topological importance of the component;

[0050] (3) Based on the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed;

[0051] (4) Based on the topology and functional importance of the components, the comprehensive importance of the components is calculated; by considering the influence of the dependent edges between different networks, the entropy weight method is used to calculate the comprehensive importance of component dependence; based on the comprehensive importance of component dependence, the key components in the hydrogen-powered high-speed train system are identified.

[0052] The step (1) is specifically:

[0053] First, the basic components of the hydrogen-powered high-speed train system and the relationships between the components are sorted out, so as to conduct a comprehensive analysis for the construction of the network topology model of the train system. The smallest maintainable unit in the train is taken as a node, and the edges in the network are constructed according to the relationships between the components, so as to form a network topology model that describes the hydrogen-powered high-speed train system.

[0054] 1) Mechanical network construction method

[0055] In a machine network (MN), nodes represent machine components and edges represent mechanical interactions. The machine network is represented by G M =(V M ,E M ) is represented by V M represents the set of nodes in the mechanical network, E MRepresents the set of edges in the mechanical network. Based on the actual experience of engineers, if a fastener (such as a bolt, screw, weld, etc.) connects a mechanical component p (corresponding to node i) and a mechanical component q (corresponding to node j), and the failure of mechanical component p will cause the loss of function of mechanical component q, then there is an edge from node i to node j in the mechanical network. By judging whether the above-mentioned action relationship exists between all mechanical components, the mechanical network model G is constructed. M .

[0056] 2) Electrical network construction method

[0057] In an electrical network (EN), nodes represent electrical components and edges represent electrical interactions. E =(V E ,E E ) is represented by V E Represents the set of nodes in the electrical network, E E Represents the set of edges in the electrical network. If electrical component p (corresponding to node i) and electrical component q (corresponding to node j) have a current action relationship, then there is an undirected edge between node i and node j in the electrical network. By judging whether the above action relationship exists between all electrical components, the electrical network model G is constructed. E .

[0058] 3) Information network construction method

[0059] In a communication network (CN), nodes represent information components and edges represent information interaction relationships. C =(V C ,E C ) is represented by V C represents the set of nodes in the information network, E C Represents the set of edges in the information network. If information component p (corresponding to node i) and information component q (corresponding to node j) have an information interaction relationship, then there is an undirected edge between node i and node j in the information network. By judging whether the above interaction relationship exists between all information components, the information network model G is constructed. C .

[0060] 4) Gas-liquid network construction method

[0061] In a gas-liquid network (GN), nodes represent components related to gas and liquid and edges represent the input or output of gas or liquid. G =(VG ,E G ) is represented by V G represents the set of nodes in the gas-liquid network, E G Represents the set of edges in the gas-liquid network. If there is a flow of gas or liquid between the gas-liquid component p (corresponding to node i) and the gas-liquid component q (corresponding to node j), then there is an undirected edge between node i and node j in the gas-liquid network. By judging whether the above-mentioned action relationship exists between all gas-liquid components, the gas-liquid network model G is constructed. G .

[0062] 5) Construction method of mechanical-electrical-information-gas-liquid interdependent network model

[0063] A dependent network is a whole composed of two or more networks with different characteristics, and there is a dependency relationship between the networks. Since some components in the hydrogen-powered high-speed train system may have mechanical, electrical, information, and gas-liquid interactions at the same time, there is a coupling mechanism between different networks, so that the failure of one network may affect the working status of other networks. Therefore, the present invention constructs the above four networks into a whole for modeling.

[0064] In order to model the hydrogen-powered high-speed train system, based on the four subnets of mechanical, electrical, information, and gas-liquid, this embodiment constructs a four-layer interdependent network model, namely the mechanical-electrical-information-gas-liquid interdependent network model (Interdependent machine-electricity-communication-gas network, IMECGN). Among them, if node i and node j from different subnets represent the same actual physical components, there is an edge between the networks between node i and node j, and the two nodes are interdependent nodes. Through the interdependent edge, it can be indicated that there is a mutual functional dependency between the nodes, and the nodes from the two networks are also coupled. In order to distinguish between the edges within the subnet and the edges between the subnets, the interaction relationship system in the mechanical, electrical, information, and gas-liquid networks is called a homogeneous edge (i.e., the edge within the subnet), and the interaction relationship between the subnets is called an interdependent edge.

[0065] The step (2) is specifically:

[0066] Since the hydrogen-powered high-speed train system is modeled as a four-layer dependent network model, the properties of the components in the topology can reflect their role in the system. In order to fully reflect the topological properties of the components, node degree, betweenness, closeness and PageRank value are used to measure their topological importance.

[0067] The node degree is used to indicate the number of edges connected to the node and can reflect the local information of the node. The node degree k of node i is i The definition is as follows:

[0068]

[0069] Among them, a ij represents the element in the i-th row and j-th column of the network adjacency matrix A. For an undirected network, if node i is connected to node j, then a ij =1 and a ji =1; otherwise a ij =0.

[0070] Node betweenness is used to reflect the importance of a node in the global network. The betweenness of node i is bc i is defined as follows:

[0071]

[0072] where σ st (i) represents the number of shortest paths between node s and node t through node i; σ st represents the number of all shortest paths between node s and node t. As can be seen from the definition, when there are more shortest paths passing through node i, its betweenness value bc i The larger it is, the more important node i is.

[0073] The closeness can reflect the difficulty of a node to other nodes, so the closeness of node i is hcc i is defined as follows:

[0074]

[0075] where d ij represents the shortest path length between node i and node j. If the closeness of node i is hcc i The larger it is, the smaller the average shortest path length from the node to other nodes is, and the more central the node is in the network.

[0076] The PageRank value can quantify the importance of the node and its neighboring nodes. The PageRank value of node i is pr i is defined as follows:

[0077]

[0078] where d f Represents the damping coefficient, which is usually taken as 0.85.

[0079] The step (3) is specifically:

[0080] Taking into account that different components have different functions in mechanical, electrical, information and gas-liquid networks, it is necessary to propose functional measurements of components based on the physical characteristics of the four networks.

[0081] Functional measures are mainly used to quantify the performance levels of different types of components. Therefore, in this embodiment, the functional importance of the three components is constructed according to their characteristics. In terms of mechanical networks, the more out-degrees a mechanical component has, the more functional support relationships it provides for other components. Therefore, the functional measure of node i in the mechanical network is can be defined as

[0082] In the electrical network, the purpose of the node is to provide electrical energy to the high-speed train system or convert electrical energy into kinetic energy. i The functional importance of Calculate, defined as Among them, u i represents the voltage at node i, I oi represents the current flowing out of node i. According to Kirchhoff's law, the voltage and current of a node are calculated as Y*U=I; where Y is the admittance matrix (Y ij represents the element in the i-th row and j-th column of the node admittance matrix in the electrical network, and ), U is the voltage vector of the node, and I is the current vector of the node. Then the current I flowing through edge ij is ij can be defined as I ij =(u i -u j )*Y ij .

[0083] In order to model the operation mechanism of the information network, in this embodiment, it is assumed that all data packets are transmitted according to the shortest path and a data traffic model is used to characterize the importance of its node functions. Considering that data transmission modeling has certain complexity and node betweenness can approximate data traffic load, the data traffic load of node i is It can be characterized by betweenness.

[0084] The hydrogen storage system and the fuel cell system are connected by hydrogen hard pipes, while the fuel cell system and the radiator are connected by rubber hoses. i The gas and liquid flow rates can be used to define the functional importance

[0085] The step (4) is specifically as follows:

[0086] In order to comprehensively measure the importance of components in different networks and construct an effective method for identifying the importance of key components of hydrogen-powered high-speed train systems, this embodiment quantifies the importance of components from two aspects: topology and function, and constructs a component interdependent comprehensive importance evaluation method based on the entropy weight method by considering the interdependence between components.

[0087] For node i in subnet l, its topological importance It can be calculated by node degree, betweenness, closeness, and PageRank. The calculation formula is as follows:

[0088]

[0089] in, and are the minimum and maximum values ​​of the degree of network l, respectively; and are the minimum and maximum values ​​of the betweenness number of network l, respectively; and are the minimum and maximum values ​​of the closeness in network l, respectively; and are the minimum and maximum PageRank values ​​in network l, respectively.

[0090] According to the topological importance of node i And the corresponding function importance The comprehensive importance of the component can be obtained through the weight coefficient λ as follows:

[0091] In order to reasonably reflect the importance of components in the IMECGN network, the comprehensive importance of nodes is met i And combined with the interdependence of the network, the entropy weight method is used to propose the interdependence comprehensive importance of the nodes. The specific calculation steps are as follows.

[0092] 1) For nodes in mechanical networks, electrical networks, information networks, and gas-liquid networks node node and nodes The overall importance of For example, we first construct the measure matrices of the four networks as follows:

[0093]

[0094]

[0095] in, Represent the nodes in the mechanical network Nodes in electrical networks Nodes in a mechanical network Nodes in the information network Nodes in a mechanical network Nodes in the gas-liquid network Nodes in electrical networks Nodes in the information network Nodes in electrical networks Nodes in the gas-liquid network Nodes in information networks Nodes in the gas-liquid network Whether there is a dependent edge connected in the , if there is a dependent edge, the value is 1, otherwise it is 0.

[0096] 2) In order to ensure that the values ​​in the entropy weights are meaningful, the values ​​of the above four judgment matrices are mapped to [ ε ,1], and obtain the normalized judgment matrix as follows:

[0097]

[0098]

[0099] Among them, ε is a number close to 0 and less than 1, and is taken as 0.01 here; B M , B E , B C , B G The maximum value of the j, q, v, and t columns in .

[0100] 3) Based on the definition of entropy, the entropy values ​​of the j, q, v, and t columns are The calculation is as follows:

[0101]

[0102] in, The definition is as follows:

[0103]

[0104] Then the weights of the j, q, v, and t indicators in the matrix are The calculation is as follows:

[0105]

[0106]

[0107] Therefore, in mechanical, electrical, information, gas and liquid networks, nodes node node and nodes Dependent comprehensive importance based on entropy weight They are defined as follows:

[0108]

[0109] Therefore, the nodes can be sorted according to the interdependent comprehensive importance based on entropy weight in different networks, so that the importance of components in the hydrogen-powered high-speed train system can be reasonably obtained.

[0110] This embodiment takes a hydrogen-powered high-speed train system as an example to calculate and implement a key component identification method. The specific steps are as follows:

[0111] According to a certain model of hydrogen train, different components and their functional relationships are divided into four categories: mechanical, electrical, information, and gas-liquid. Then, a mechanical-electrical-information-gas-liquid interdependent network model can be constructed. The specific components are shown in Table 1.

[0112] Table 1

[0113]

[0114]

[0115] In order to obtain the functional importance of components in the electrical network and the gas-liquid network, it is assumed that the element Y in the admittance matrix of the electrical network ij The values ​​of are all 10, the voltage of the power generation node is 1, and the current of the user node is 1; in the gas-liquid network, it is assumed that the flow rate of the liquid flowing through the component is 1m 3 / h, the gas flows through the parts, the flow rate is 2m 3 / h. Since both gas and liquid flow through the stack, its flow rate is assumed to be 3m 3 / h; Considering that both topological attributes and functional attributes are of great significance, the weight coefficient λ is set to 0.5. By taking the above steps, the interdependent comprehensive importance of nodes in the four subnets is calculated, and the calculation results are as follows Figure 6 As shown in Table 2, the top 10 key components and their dependent comprehensive importance are obtained.

[0116] Table 2

[0117]

[0118]

[0119] Example 3

[0120] This embodiment 3 provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium is used to store computer instructions. When the computer instructions are executed by a processor, the above-mentioned method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model is implemented. The method includes:

[0121] Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system;

[0122] According to the topological properties in network theory, the node degree, betweenness, harmony closeness and PageRank value are calculated to obtain the topological importance of the component in the network;

[0123] According to the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed;

[0124] The comprehensive importance of components is calculated based on their topological importance and functional importance. The entropy weight method is used to calculate the comprehensive importance of component interdependence by considering the influence of interdependent edges between different networks. The key components in the hydrogen-powered high-speed train system are identified based on their comprehensive importance of interdependence.

[0125] Example 4

[0126] This embodiment 4 provides a computer device, including a memory and a processor, the processor and the memory communicate with each other, the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the above-mentioned method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, the method comprising:

[0127] Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system;

[0128] According to the topological properties in network theory, the node degree, betweenness, harmony closeness and PageRank value are calculated to obtain the topological importance of the component in the network;

[0129] According to the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed;

[0130] The comprehensive importance of components is calculated based on their topological importance and functional importance. The entropy weight method is used to calculate the comprehensive importance of component interdependence by considering the influence of interdependent edges between different networks. The key components in the hydrogen-powered high-speed train system are identified based on their comprehensive importance of interdependence.

[0131] Example 5

[0132] This embodiment 5 provides an electronic device, including: a processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory, so that the electronic device executes instructions for implementing the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described above, the method comprising:

[0133] Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system;

[0134] According to the topological properties in network theory, the node degree, betweenness, harmony closeness and PageRank value are calculated to obtain the topological importance of the component in the network;

[0135] According to the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed;

[0136] The comprehensive importance of components is calculated based on their topological importance and functional importance. The entropy weight method is used to calculate the comprehensive importance of component interdependence by considering the influence of interdependent edges between different networks. The key components in the hydrogen-powered high-speed train system are identified based on their comprehensive importance of interdependence.

[0137] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0139] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0140] These computer program instructions can also be loaded onto a computer or other programmable data processing device, and a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0141] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative work on the basis of the technical solution disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model, characterized in that: include: Construct a mechanical-electrical-information-gas-liquid interdependent network model based on the components of the hydrogen-powered high-speed train system; According to the topological properties in network theory, the node degree, betweenness, harmony closeness and PageRank value are calculated to obtain the topological importance of the component in the network; According to the physical properties of the components in the mechanical network, electrical network, information network, and gas-liquid network, the functional importance of the above four components is proposed; The comprehensive importance of components is calculated based on their topological importance and functional importance. The entropy weight method is used to calculate the comprehensive importance of component interdependence by considering the influence of interdependent edges between different networks. The key components in the hydrogen-powered high-speed train system are identified based on their comprehensive importance of interdependence.

2. The method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model according to claim 1 is characterized in that: Components and their interactions are extracted from the hydrogen-powered high-speed train system; four network models, namely mechanical, electrical, information, and gas-liquid, are constructed according to the types of components and their interactions; for the same physical components in the four subnets, dependent edges between networks are added to construct a mechanical-electrical-information-gas-liquid dependent network model.

3. The method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model according to claim 2 is characterized in that: According to the classic topological measurement in complex network theory, node degree, betweenness, closeness and PageRank are selected as the measurement indicators of component topological properties; the node degree of all nodes in the four subnets is calculated. k , betweenness bc , compactness h cc and PageRank pr The value of; According to the four topological measures of the component, its topological importance is calculated.

4. The method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model according to claim 3 is characterized in that: For the components in the mechanical network, the functional importance of the components in the mechanical network is proposed based on the functional support; for the components in the electrical network, Kirchhoff's law is used to calculate the power of the components, and the functional importance of the components in the electrical network is proposed; for the components in the information network, the data traffic model is used and approximated by the betweenness, and the functional importance of the components in the information network is proposed; for the components in the gas-liquid network, the functional importance of the components in the gas-liquid network is proposed based on the hydrogen or liquid flow passing through the components.

5. The method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model according to claim 4 is characterized in that: The comprehensive importance of the components can be obtained through the weight coefficient, the topological importance and the functional importance of the components in the four networks; by considering the comprehensive importance and interdependence in the four networks, the measurement matrix of the mechanical, electrical, information and gas-liquid networks is constructed; the entropy weight method is used to calculate the interdependence measure of the components in the four subnets.

6. A key component identification system for hydrogen-powered high-speed train system based on a dependent network model, characterized in that: include: A building module for constructing a mechanical-electrical-information-gas-liquid interdependent network model based on the components of a hydrogen-powered high-speed train system; The first calculation module is used to calculate the node degree, betweenness, harmonic closeness and PageRank value according to the topological attributes in network theory, and obtain the topological importance of the component in the network; The second calculation module is used to calculate the functional importance of components in the mechanical network, the electrical network, the information network, and the gas-liquid network according to the physical properties of the components in the mechanical network, the electrical network, the information network, and the gas-liquid network; The third calculation module is used to calculate the comprehensive importance of the components according to the topological importance and functional importance of the components; by considering the influence of the dependent edges between different networks, the entropy weight method is used to calculate the dependent comprehensive importance of the components; The identification module is used to identify key components in the hydrogen-powered high-speed train system based on the interdependent comprehensive importance of the components.

7. A non-transitory computer-readable storage medium, characterized in that: The non-transitory computer-readable storage medium is used to store computer instructions. When the computer instructions are executed by the processor, the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in any one of claims 1 to 5 is implemented.

8. A computer device, characterized in that: It includes a memory and a processor, the processor and the memory communicate with each other, the memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in any one of claims 1 to 5.

9. An electronic device, characterized in that: include: A processor, a memory and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device is running, the processor executes the computer program stored in the memory so that the electronic device executes instructions for implementing the method for identifying key components of a hydrogen-powered high-speed train system based on a dependent network model as described in any one of claims 1 to 5.

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