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129results about How to "Realize dynamic changes" patented technology

Block chain node dynamic change method, system and computer readable storage medium

The invention discloses a block chain node dynamic change method, a system thereof and a computer readable storage medium, wherein the method comprises the following steps that: when receiving a transaction request of a node change in a block chain network, the nodes package the transaction request into a block; a consensus module and a network module perform consensus and networking to the blockto enable each node in the block chain network to obtain the block; the nodes respectively execute the transaction process of the block in the virtual machine to trigger a framework callback of a contract based on the executed transaction process; and a node configuration list is updated based on the framework callback of the contract to change the nodes in the node configuration list. The invention is capable of realizing dynamic change of the nodes in all types of block chains, so that the change scenario of the nodes is richer and the change mode is more flexible.
Owner:WEBANK (CHINA)

Method for binding computer hardware and software

The invention discloses a method for realizing the binding of computer hardware and software. Hardware identification codes are stored in the computer hardware, and the software includes permission files; the method comprises the following steps: A, reading the hardware identification codes and the permission files from the computer hardware and software respectively; B, by certifying the use validity of the obtained hardware identification codes and the permission files, the validity certification of an algorithm is performed; and C, after the certification passes, the software runs; and by using the updated algorithm, the hardware identification codes in the hardware and the permission files in the software are updated. Due to the adoption of the method, the dynamic change of binding elements is realized.
Owner:BEIJING EVOC INTELLIGENT TECH +1

Pre-fetch method of object file system

The invention discloses a pre-fetch method of an object file system. The method comprises the steps of initializing data structures and variables of the object file system, judging whether a server receives an object reading request from a client, analyzing the object reading request if the server receives the object reading request, determining a current object and an Oid of the current object according to the object reading request, judging whether object reading request hits a cache, judging whether a timing value greater than or equal to a time threshold valve T_MAX exists if the object reading request does not hit the cache, inquiring a pre-fetch attribute table according to the Oid of the current object if the timing value does not exist, obtaining a pre-fetch attribute of the current object, executing disk reading and pre-fetch operation according to the pre-fetch attribute, modifying single-step pre-fetch information of the pre-fetch attribute table according to an overall access order array, and modifying multi-step pre-fetch information of the pre-fetch attribute table according to the overall access order array. The pre-fetch method achieves self-adaption regulation of a pre-fetch range, a pre-fetch accuracy rate is kept close to the set threshold valve, single-step pre-fetch and multi-step pre-fetch are considered, and source occupancy is controllable.
Owner:HUAZHONG UNIV OF SCI & TECH

A drainage pipe network design optimization system and method based on a GIS technology

The invention provides a drainage pipe network design optimization system and method based on the GIS technology. The drainage pipe network design optimization system comprises a pipe network data unit, a pipe network editing unit and a pipe network analysis unit. The pipe network data unit is used for storing pipe network data of the drainage pipe network; The pipe network editing unit is used for visualizing and managing the pipe network data of the pipe network data unit; The pipe network analysis unit is used for analyzing attribute characteristics of a pipe network according to the pipe network data and carrying out pipe network hydraulic analysis, rainwater pipe network waterlogging-prone area analysis, rainwater regulation and storage pool position selection and rainwater regulationand storage pool volume determination according to the attribute characteristics of the pipe network,. various kinds of analysis and dynamic optimization design of the drainage pipe network are achieved through the geographic information technology, and the design efficiency and quality of the drainage pipe network are improved.
Owner:MCC CAPITAL ENGINEERING & RESEARCH

Message transmission method and device

The invention discloses a message transmission method and device, and relates to the technical field of computers. A specific embodiment of the method comprises the following steps: receiving at leastone consumption identifier; when it is confirmed that a storage queue corresponding to the consumption identifier exists, obtaining a message of which the type is the same as that of the message, andthen storing the message into the storage queue; and outputting the message in the storage queue. According to the embodiment, the consumption identifier is sent to the message queue, the message queue stores the message into the storage queue constructed according to the consumption identifier, and the message transmission with the consumer is carried out through the storage queue, so that the technical problem that the message mode must be predetermined in the prior art is solved, and the use flexibility of a user is improved.
Owner:BEIJING JINGDONG SHANGKE INFORMATION TECH CO LTD +1

Processing method, device, storage medium and electronic equipment for game sound reverberation

The invention discloses a processing method, device, storage medium and electronic equipment for game sound reverberation. A current location of a virtual object in a game scene is obtained; accordingto the current location, a virtual resource in a preset range in the game scene is determined; according to location information of the virtual resource, a reverberation coefficient of the virtual resource is determined; according to the reverberation coefficient of the virtual resource, a sound reverberation value of the current location of the virtual object in the game scene is determined, andaccording to a real-time situation of the virtual resource in the game scene, the dynamic change of an sound reverberation effect is achieved, and the resource consumption of a system is greatly reduced at the same time, so that a player can gain better immersive type sound effect experience in the game; in addition, for a developer, a large amount of labor is not needed to mark the sound effectcorresponding to each position in the game scene.
Owner:NETEASE (HANGZHOU) NETWORK CO LTD

Formal concept based file system directory structure organization method

The present invention discloses a formal concept based file system directory structure organization method. The method comprises the following steps: A: reconstructing a conventional file system tree-shaped directory structure into a concept based lattice structure; B: mapping a file operation into an operation on a conceptional lattice, so as to implement a dynamic change of a directory structure; and C: implementing access to a certain file by means of a plurality of paths, so that multi-level tracebacks in the conventional tree-shaped directory structure manner are avoided. According to the method provided by the present invention, the conventional file system tree-shaped directory structure is modified into the concept based lattice structure, and then the file operation is mapped into the operation on the conceptional lattice to implement the dynamic change of the directory structure, so that the access to the certain file by means of the plurality of paths is implemented, and the multi-level tracebacks in the conventional tree-shaped directory structure manner are avoided; and the method well combines conventional file system directory and formal concept analysis technologies, so that the dynamic change of the file system directory structure and query of a file by means of a plurality of paths can be implemented.
Owner:HENAN UNIVERSITY

Method for managing high dimensional data and displaying associated data dynamically and contrastively

The invention discloses a method for managing high dimensional data and displaying associated data dynamically and contrastively. The method realizes high dimensional data management functions such as the high dimensional data entry, edition, browse and the like by automatically creating a human-computer interaction operating interface for managing the high dimensional data. The method for managing high dimensional data tables and displaying lists mainly comprises the steps of: creating a table structure for a base data table and a sorting parameter data table of the high dimensional data tables, entering and editing the data based on the structure of the high dimensional tables, and browsing the associated data contrastively. According to the method, corresponding codes are executed dynamically based on the parameters set or selected by a user in a parameter input device of a personal computer (PC) machine, thereby meeting the requirements of the user on managing the high dimensional data dynamically and displaying the result forms. The method is simple and practical, and has a wide range of application. And meanwhile, under the condition that the high dimensional tables are required to adopt, the method is a better solution for realizing the management and the dynamic contrast display of the associated data, thereby having wide practicability.
Owner:NORTHWEST UNIV(CN) +1

Experimental device used for evaluation of water stability of bituminous mixture and experimental method

The invention discloses an experimental device used for evaluation of water stability of a bituminous mixture and an experimental method. The experimental device comprises dynamic load loading equipment, a working box, an indirect tensile test device, a temperature control device and fixed equipment. The experimental device can simulate an external environment of the bituminous mixture in the practical use condition. By adopting a method of conducting an indirect tensile fatigue test in the experimental device, the evaluation of water stability performance of the bituminous mixture under multi-field coupling of stress field, temperature field, waterpower field and dynamic change is achieved, and a fatigue life is used to evaluate the water stability performance of the bituminous mixture in different use environments. The experimental device and the experimental method can be used for studying the water stability performance of the bituminous mixture in the practical use environment, and have very good evaluating effectiveness.
Owner:SOUTHEAST UNIV

Mimicry Web gateway system and mimicry Web gateway method for carrying out dynamic scheduling by adopting random selection

The invention discloses a mimicry Web gateway system and a mimicry Web gateway method for carrying out dynamic scheduling by adopting random selection. The system comprises a system module distribution module, a multimode judgment module, a security Cookie generation module, a security Cookie decoding module, a heterogeneous server pool group, a background server dynamic switching module group, adatabase synchronization module, a security Cookie database group and a security configuration strategy. According to the invention, heterogeneous integration is carried out on the server, dynamic switching of the executor group is realized by utilizing a random selection technology, and a mimic Web gateway system is realized through Cookie mapping. According to the Web gateway based on dynamic heterogeneous redundancy, the background executor is dynamically switched by utilizing the dynamic scheduling and heterogeneous redundancy technology, the risk and loss of attacking a website system arereduced, the attack behavior can be more accurately judged, and countermeasures are taken in time.
Owner:HANGZHOU DIANZI UNIV

Method and device for regulating and controlling memory and medium

The invention discloses a method for regulating and controlling a memory. The method comprises the following steps: creating a parent memory pool based on all memories; occupying a memory of a predetermined size from the parent memory pool to create a child memory pool; judging whether the memory size of the sub-memory pool can meet the current requirement of the system or not; in response to thefact that the memory size of the child memory pool cannot meet the current requirement of the system, sending a memory request to the parent memory pool; and the child memory pool receives the new memory allocated by the parent memory pool. The invention further discloses computer equipment and a readable storage medium. According to the method and device for regulating and controlling the memoryand the medium, through cooperative use of the parent memory pool and the child memory pool, dynamic change of the memory is achieved, system memory resources are fully utilized, the response speed todata writing of a user is increased, and the read-write performance of a storage system is improved.
Owner:SUZHOU LANGCHAO INTELLIGENT TECH CO LTD

Shield tail brush dynamic sealing performance testing device and testing method thereof

The invention discloses a shield tail brush dynamic sealing performance testing device and a testing method thereof, and solves the problem of low test precision of the pressure bearing capacity of ashield tail brush in the prior art. The device comprises a supporting cross beam, an outer cylinder and an inner cylinder are arranged on the supporting cross beam, the inner cylinder is located in the outer cylinder, and the outer cylinder is connected with the supporting cross beam through a gap adjusting mechanism. The inner cylinder is connected with the supporting cross beam through an extrusion driving piece, and a shield tail brush is fixed to the inner wall of the outer cylinder and located between the outer cylinder and the inner cylinder. According to the invention, the actual tunneling state of a shield tunneling machine can be restored to a greater extent, the influence of different types of grease on the sealing performance of the shield tail brush and the sealing performancetest of the shield tail brush are tested, and more accurate data support is provided for shield construction.
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD

Consensus mechanism operation method applied to alliance chain

The invention discloses a consensus mechanism operation method applied to an alliance chain. The method comprises the following steps of dividing nodes in the alliance chain into a plurality of slaveconsensus sets, except the last slave consensus set, enabling the number of nodes of each of the rest slave consensus sets to be the same; when a node wants to join in or quit the consensus, executinga JION or EXIT protocol; selecting a master node of each slave consensus set according to a longest chain principle; when the preparation message sent by the main node is abnormal, executing a view switching protocol; executing a consistency protocol in each slave consensus set, and after local consensus is consistent, entering a master consensus set composed of all master nodes to execute the consistency protocol, i.e., performing global consensus; and after the global consensus is consistent, finishing the transaction consensus. According to the method, consensus efficiency of an alliance chain under the condition of large node scale can be effectively improved, the communication overhead is reduced to a certain extent, dynamic change of system nodes can be realized, and a certain system error-tolerant rate, safety and activeness are further ensured.
Owner:NANJING UNIV OF POSTS & TELECOMM

LED illumination control method and device

The invention discloses an LED illumination control method and device applied to a lantern including an LED and a microcontroller. The method in the embodiment of the present application comprises obtaining the brightness level of the LED and the color change minimum unit in a full color wheel; controlling the brightness of the LED according to the brightness level; and adjusting the duty ratio ofa PWM signal for controlling three colors RGB in the LED according to the color change minimum unit to control the color change speed of the LED and achieve a dimming and speed regulation purpose.
Owner:SHENZHEN H&T INTELLIGENT CONTROL

Traffic signal self-adaptive iterative learning control method for attenuation memory de-counterfeiting control

The invention relates to a traffic signal self-adaptive iterative learning control method for attenuation memory de-counterfeiting control. The method combines attenuation memory de-counterfeiting control with iterative learning control so as to overcome the technical defects of the traditional signal control scheme. Open-loop and closed-loop PD type are adopted for iterative learning control by taking the repetitive characteristic of traffic flow as an entry point, therefore, in order to solve the problem that the influence of traffic flow historical data on the current real-time state is continuously reduced as time goes on, an attenuation memory function is added to a pseudo-removal control performance index function, dynamic change of a closed-loop learning law is realized, and the accuracy of iterative learning is improved, so that the traffic efficiency of a road network is improved.
Owner:TAIYUAN UNIV OF TECH

Display method of television graphical interface

The invention relates to a display method of a television graphical interface. A detachable interface program packet containing an interface program is set in a system of a television, and the interface program is provided with a resource displayed by a television interface; and after the system of the television is started, whether the interface program packet exists or not is detected, the display of the graphical interface is conducted through the interface program in the interface program packet if the interface program packet exists, and a system default interface is loaded if no interface program packet exists. Due to the adoption of the display method of the television graphical interface, a display style, display images and the like of the television can be selected according to the preference of users, the interface display resource can be updated through a simple way, an application program is unnecessary to be upgraded, and the dynamic variation of the interface style can be realized without upgrading the entire system. The diversification of the interface is increased, a great amount of maintenance work of the subsequent software can be reduced, and the user experience can be obviously improved.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

Imaging and tracking of interaction between proteins in living cells by utilizing bimolecular fluorescence complementation technology based on self-linkage label

The invention discloses imaging and tracking of interaction between proteins in living cells by utilizing bimolecular fluorescence complementation technology based on a self-linkage label, and revealsan interaction relation between the proteins and explores that a dynamic behavior of an interaction compound is already become a hot spot for proteomics research. The interaction between proteins forms a basis of cellular activity. An existing method for researching the interaction of the proteins do not simultaneously have the characteristics of living cells, high temporal-spatial resolution, single molecules and the like, and therefore, a new method for making and tracking the interaction between the proteins needs to be developed. The invention discloses a method for novel marking the interaction compound of the proteins by adopting the bimolecular fluorescence complementation based on the self-linkage label. The self-linkage label is split into two parts at the proper site, and two proteins having the interaction effect are fused respectively, and due to the interaction of the two proteins, the split self-linkage labels are pulled spatially and closely so as to form a complete self-linkage label; by adding dyes, the interaction compound can give out fluorescent light. The novel marking method utilizing the bimolecular fluorescence complementation based on the self-linkage label is widely applied to cell biology, and single molecular horizontal detection and tracking on the interaction of the pair of proteins in the cells in a high temporal-spatial resolution manner can berealized.
Owner:PEKING UNIV

Electric brake exit point speed calculation method and electric brake exit control method and device

The invention relates to an electric brake exit point speed calculation method and an electric brake exit control method and device. The level information of the signal system is introduced into the calculation of an exit point speed value; dynamic change of an electric brake exit point is achieved, electric brake exit is controlled based on a TCMS system, on one hand, the universality problem ofan electric brake exit point control method can be solved, that is to say, electric-pneumatic matching parameters of each station can be changed at any time according to different level information ofa signal system; on the other hand, the signal system, the braking system and the traction system are matched with one another, the TCMS not only plays a role in forwarding, but also plays a good control role, and the debugging difficulty and workload are greatly reduced.
Owner:CRRC QINGDAO SIFANG ROLLING STOCK RES INST

Projection apparatus illuminating with cloud effect

A projection apparatus comprises a housing with a projection opening, a light source component, a reflective bowl and a driving motor in the housing, and a transparent cover is mounted on the housing and protrudes upwardly out of the projection opening. The light emitted by the light source component is illuminated on the reflective surface, and then the light passes through the transparent cover after being reflected. The light source component, the reflective bowl and the transparent cover can project to produce a cloud effect.
Owner:XU LONGCAI

Image rendering method, device and equipment and storage medium

The embodiment of the invention discloses an image rendering method, device and equipment and a storage medium, and belongs to the technical field of image processing. The method comprises the following steps: determining a plurality of position points arranged on the same plane; for each position point in the plurality of position points, according to the plurality of first feature points and thefirst noise values of the plurality of first feature points, selecting the plurality of first feature points located on the same straight line as sampling points; modifying the first noise value of each sampling point according to a currently set rendering parameter to obtain a second noise value of each sampling point, the second noise value of each sampling point indicating the thickness of thevolume cloud at the sampling point; obtaining a pixel value of the position point according to the second noise value of each sampling point; and generating a volume cloud image according to the pixel values of the plurality of position points; and modifying the first noise value to obtain a second noise value, and changing the rendered volume cloud image. And when the rendering parameter is dynamically changed, the second noise value is dynamically changed, so that the dynamically changed volume cloud is rendered.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Virtual sky picture rendering method and related equipment

ActiveCN113077541AControl resolutionChange in control effectTexturing/coloring3D-image renderingComputer graphics (images)Vertex normal
The embodiment of the invention provides a virtual sky picture rendering method and related equipment and relates to the technical field of computers. The method comprises the following steps of acquiring the vector information of each vertex normal on a preset sphere model; based on the preset background color information of the virtual sky picture and the vector information of each vertex normal, determining the color information of each pixel point position on the preset sphere model; and rendering a virtual sky picture on a preset sphere model based on the color information of each pixel point position. According to the method, efficiency of rendering the virtual sky picture can be effectively improved.
Owner:广州益聚未来网络科技有限公司

Controllable strake wing/canard wing pitching angle movement system of airplane wind tunnel test model

ActiveCN104503483AImplement step changeControl Motion ParametersAerodynamic testingControl using feedbackJet aeroplaneStatic mode
The invention discloses a controllable strake wing / canard wing pitching angle movement system of an airplane wind tunnel test model. The controllable strake wing / canard wing pitching angle movement system comprises a headpiece and frame component, an airplane model shafting vertical axis, left and right connecting shafts, left and right strake wings / canard wings as well as rotary shafts thereof, left and right bearings, left and right bearing seats, left and right reversing bevel gear pairs, left and right motor installation bases, left and right motors and a coder, left and right main wings, a computer and left and right motor drivers, wherein the right strake wing / canard wing is fixed with the right strake wing / canard wing rotary shaft, the right strake wing / canard wing rotary shaft is connected with the right end of the right connecting shaft, the left end of the right connecting shaft is connected with lower gears of the right reversing bevel gear pair, the same connecting mode is adopted at the left side; the left strake wing / canard wing rotary shaft axis and the right strake wing / canard wing rotary shaft axis are symmetrically arranged along longitudinal symmetrical surfaces of the airplane model shafting vertical axis. The controllable strake wing / canard wing pitching angle movement system can be used for realizing controllable yaw motion of the strake wing / canard wing pitching angle, and changing the mode of regulating the strake wing / canard wing pitching angle through a fixed angle plate in a static mode in the conventional wind tunnel test.
Owner:中国航空工业空气动力研究院

Video code rate control method and device, transcoding processing method and device and machine equipment

The invention discloses a video code rate control method, a video transcoding processing method, a video transcoding processing device and machine equipment. The method comprises the following steps:taking each frame of video image data in a video stream as the current frame of video image data, and carrying out video content detection on a preset number of frames of continuous video image data relative to the current frame of video image data; calculating the video change information of the current frame of video image data through the video contents respectively corresponding to the continuous preset number of frames of video image data obtained through detection; and adaptively updating the code rate corresponding to the current frame of video image data according to the video change information. Therefore, each frame of video image data in the video stream has a corresponding code rate, and is obtained by operation according to the video change of the frame of video image data, sothat the dynamic change of the effective code rate of the video stream is realized, the video stream is suitable for each frame of video image data, and the effective and accurate control of the coderate is realized.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Method and device for configuring ACL (Access Control List) rules

The invention provides a method and device for configuring ACL (Access Control List) rules. The method comprises acquiring a changed label when the label is changed, and updating, according to the changed label, a preconfigured label in the ACL rules. Embodiments of the present invention can realize dynamic changes of the label configured in the ACL rules and prevent erroneous or invalid matching.
Owner:BEIJING HUAWEI DIGITAL TECH

Streetlamp system

The invention discloses a street lamp system. The system comprises a vertical pole, a lamp cap, a power supply system and a control system, wherein the lamp cap comprises a lamp cap body, a radiating fin and a plurality of lamps; a groove is formed in the lower end surface of the lamp cap body; the radiating fin is fixed to the bottom part of the groove; the lamps are fixed on the radiating fin; a reflecting layer coats the inner side of the groove; the control system comprises a lighting strength sensor, a first controller, and a plurality of infrared sensors for detecting whether people is on the road; the power system further comprises a stepping motor, a storage battery, a solar cell panel, a base, a second controller and a bracket. According to the streetlamp system, the solar energy is used for generating power to increase electricity energy for a street lamp; the utilization rate of the electricity energy is high; meanwhile, the solar energy conversion efficiency can be effectively increased.
Owner:STATE GRID CORP OF CHINA +1

Method for realizing light patch dynamic illumination, storage medium and computing equipment

The invention provides a method for realizing light patch dynamic illumination, a storage medium and a computing equipment. The method comprises the following steps that the main light source of the light patch is stripped off, and the illumination result of other light sources is separated out; the ambient diffuse reflection of the light patch is separated; the illumination result of the main light source is calculated again; the illumination result of the main light source is added with the illumination result of other light sources and the ambient diffuse reflection. The method, the storagemedium and the computing device for achieving the dynamic illumination of the light map are provided, so that the three-dimensional scene does not need to be re-baked again, and the original single-tension map can be continuously used. The dynamic change of the main light source and the dynamic high-light reflection and high-precision normal labeling effect can be achieved, and the environment shielding of the original light map is kept.
Owner:SNAIL GAMES

Microcosmic and nano-scale electro-mechanical coupling feature measurement device based on AFM and detection method thereof

The present invention provides a microcosmic and nano-scale electro-mechanical coupling feature measurement device based on an AFM (Atomic Force Microscope). The device comprises a piezoelectric actuator, an AFM probe, a conductive second probe, a laser emitter, a microscope, a detector and a data processing center; two ends of a flexible and elastic conductive sample are installed on a fixed mount through clamps; the movable piezoelectric actuator is installed on the fixed mount; the fixed mount is provided with the AFM probe and the conductive second probe, the AFM probe is in contact with the surface of the flexible and elastic conductive sample through motion, and the conductive second probe is in contact with the surface of the flexible and elastic conductive sample; and an AFM is internally provided with the laser emitter and the detector, and the laser emitter is configured to emit signals. The microcosmic and nano-scale electro-mechanical coupling feature measurement device based on the AFM and the detection method thereof can perform test of the nano-scale conductive performance and mechanical load coupling relation so as to dynamically reflect the relation of the mechanical loads, the structures and the material performances of test samples under the electro-mechanical coupling action in real time.
Owner:常州市利多合金材料有限公司 +1

Resource distribution implementation method and server

The embodiment of the invention relates to the technical field of Internet and discloses a resource distribution implementation method and a server. The resource distribution implementation method comprises the following steps of providing a policy configuration interface; receiving policy information through the policy configuration interface, and storing the received policy information to a preset area; when a resource request is received, obtaining the policy information matched with the resource request from the preset area; and determining a distribution path corresponding to the resourcerequest according to the obtained policy information. The embodiment of the invention further provides a server. According to the embodiment of the invention, dynamic change of the policy informationcan be realized, which is convenient and fast.
Owner:CHINANETCENT TECH

Dynamic VMS (Variable Message Sign) layout networking method and device

The invention discloses a dynamic VMS (Variable Message Sign) layout networking method and device, and aims to dynamically display a road network structure and a traffic state and improve a traffic guidance effect. The dynamic VMS layout networking method comprises the following steps: for each VMS display equipment, determining a list of road segments within the guidance range of the VMS display equipment; selecting road segments satisfying a predetermined condition from the list of road segments within the guidance range to form a list of road segments displayed by the VMS display equipment in the present period of time; obtaining the road segment traffic information in the present period of time of the road segments in the list of road segments displayed; determining the corresponding state of each road segment according to the road segment traffic information of each road segment and displaying the state of each road segment on the VMS display equipment; determining whether the guidance effect in the present period of time is superior to that of the last period of time according to the road segment traffic information; if the determination result is negative, returning to the step of selecting road segments satisfying the predetermined condition from the list of road segments within the guidance range to form the list of road segments displayed by the VMS display equipment in the present period of time.
Owner:BEIJING STONE INTELLIGENT TRANSPORTATION SYST INTEGRATION

CAN bus safety identification method based on transient state

The invention discloses a CAN bus safety identification method based on a transient state. The method comprises the following steps that 1, when an automobile leaves a factory, factory setting is conducted by a manufacturer, power-on starting is conducted on all ECUs, the ECUs obtain transient values Vts of the ECUs and send the transient values Vts to other ECUs, and after factory setting is finished, the transient values Vts of the other ECUs are stored in all the ECUs; 2, when the automobile is started each time, the ECU obtains a starting time stamp Ti; 3, each ECU generates a dynamic keyK, the key K is only effective in the driving period of the automobile, and when the automobile is stalled and K is invalid, a new key K can be generated again when the automobile is started next time; 4, the message data is encrypted by using the dynamic key K of the ECU when the ECU sends the message to obtain DATA; and the receiver ECUi finds out the transient value of the sender from the transient values stored in the receiver ECUi after receiving the message, calculates a decryption secret key K' according to Ti, and decrypts the encrypted message DATA to obtain the message data if K'=K.
Owner:中国计量大学上虞高等研究院有限公司 +1
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