17results about How to "Reduce Communication Complexity" patented technology

The invention discloses an unmanned aerial vehicle cluster security collaboration method, system and device, a medium and a product. The unmanned aerial vehicle cluster comprises a plurality of pre-divided clusters, each cluster comprises a pre-selected first cluster head node and a plurality of in-cluster child nodes, and the credibility of the first cluster head node meets a preset condition and is larger than that of the in-cluster child nodes. According to the method, secure communication and data sharing among unmanned aerial vehicle cluster nodes are realized through a consensus mechanism, and the security and reliability of an unmanned aerial vehicle cluster are improved; an unmanned aerial vehicle is divided into a plurality of clusters under an unmanned aerial vehicle cluster hierarchical network, the plurality of clusters work cooperatively, and an unmanned aerial vehicle cluster consensus mechanism is divided into an intra-cluster consensus mechanism and a lightweight inter-cluster consensus mechanism by means of hierarchical network characteristics of an unmanned aerial vehicle cluster. The cluster head communication pressure is relieved, communication congestion between cluster head nodes is relieved, the communication complexity is reduced, and the communication efficiency of the unmanned aerial vehicle cluster is improved.

The invention discloses a method and a system for debugging and running a brain-like computing chip, compared with the prior art, the system comprises an upper computer and a lower computer, the upper computer and the lower computer are connected through a transmission control protocol to improve the reliability of communication transmission, a command buffer module is introduced into the upper computer, and the command buffer module is connected with the lower computer. The upper computer packages communication data and a command header and puts the communication data and the command header into a command buffer module, so that one-time connection between the upper computer and the lower computer is realized, the overhead of multiple times of connection is reduced, and the communication efficiency is improved; in the lower computer, a sending module and a receiving module of a field programmable gate array based on a first-in first-out queue and a handshake mechanism play a role in buffering communication data, congestion control of the communication data is realized, and communication complexity is reduced.

The invention belongs to the technical field of security verification, and discloses an on-chain data security verification method and system. The method comprises the following steps: constructing a block chain network based on a cloud data center, and carrying out key generation and identity authentication on all nodes; encrypting and signing the real-time under-chain data based on the first node; based on an IFPS system, storing the encrypted real-time off-chain data, and generating a real-time on-chain data block; based on the block chain network, consensus is carried out on the real-time data transaction request, and link-up is carried out on the real-time on-chain data block; based on the second node, performing signature verification on the real-time signature data, and after the signature verification is passed, obtaining a real-time storage address; extracting the encrypted real-time off-chain data according to the real-time storage address, and decrypting the encrypted real-time off-chain data; and converting the real-time transaction record into a corresponding real-time transaction data block, and performing chaining. According to the invention, the problems of high cost, low efficiency and easy attack in the prior art are solved.

The invention relates to a power grid equipment image recognition method and device, computer equipment and a storage medium, and relates to the technical field of artificial intelligence. The method comprises the following steps: receiving target image data sent by shooting equipment through a pre-configured interface standard in an airborne image recognition system; the target image data is image data shot by a shooting device carrying an image sensor in a preset shooting scene; the image sensor communicates with the shooting equipment through an interface standard; determining a computing resource demand of the target image data, and if the computing resource demand is smaller than a computing resource of the edge computing terminal, identifying the target image data through a trained equipment identification model to obtain basic information of power grid equipment contained in the target image data; the equipment identification model is obtained by training based on an image training set containing classification labels of the power grid equipment; the basic information comprises category information and position information. By adopting the method, the image recognition efficiency can be improved.

The invention discloses a linear communication complexity consensus method based on a DAG structure, and belongs to the field of computer science and technology. According to the invention, an efficient BFT consensus method is established by optimizing a communication process and introducing a broadcast mode of linear communication complexity. According to the invention, a broadcast mode (VBC) with linear communication complexity is introduced to replace the traditional reliable broadcast (RBC), so that the communication complexity is greatly reduced, and the efficiency of the system is improved; in addition, the communication complexity is effectively reduced, the system can process more transactions, the throughput of the system is remarkably improved, and the requirement of large-scale application is met; furthermore, a broadcast mode (VBC) with linear communication complexity enables the communication overhead not to be obviously increased when the number of nodes of the system is increased, so that the expandability of the system is improved, and the method is suitable for a larger-scale distributed network; and finally, by combining a distributed hash table and a threshold signature technology, the system can still maintain high-level security and fault tolerance and prevent attack of malicious nodes while the communication complexity is reduced, the throughput of the system can be remarkably improved, the expandability of the BFT consensus system in large-scale application can be realized, and the method is suitable for popularization and application. Therefore, a major breakthrough is brought to the development of a distributed system and a block chain technology.

The present invention discloses an enhanced Byzantine consensus method, device and readable storage medium in a distributed system, and relates to the field of blockchain network communication technology. The method includes an initialization process and a consensus process. The initialization process includes grouping and determining the leader node leader; the consensus process includes a request phase, a pre-preparation phase, a preparation phase and a response phase; when the node receives the pre-preparation message broadcast by the master node, it determines that it is the leader node and verifies that the master node information is correct, and then continues the consensus and puts the pre-preparation message into a temporary storage pool; when the node receives the preparation message broadcast by the leader node, it determines that it is the leader node or the master node, and when it receives the preparation message broadcast by more than 2f+1 nodes, the node determines that the consensus is valid and stores it in the local storage pool. The present invention can effectively reduce the communication overhead between nodes, improve system throughput, and enhance system reliability and anti-Byzantine fault tolerance.

The invention provides a vehicle-mounted system and a communication method thereof, and the vehicle-mounted system comprises a vehicle-mounted communication unit which is used for obtaining vehicle data and transmitting the vehicle data to other function modules of the vehicle-mounted system; the automatic driving unit is in communication connection with the vehicle-mounted communication unit so as to control the vehicle according to the received vehicle data; wherein the vehicle-mounted communication unit comprises a data receiving and transmitting module and a shared memory module which are in communication connection with each other, and the data receiving and transmitting module and the automatic driving unit perform data access based on the shared memory module so as to realize communication between the vehicle-mounted communication unit and the automatic driving unit. The technical problems to be solved are that the requirement of an automatic driving module for the timeliness of vehicle data is high, an event-driven communication mode is complex, the timeliness of vehicle data transmission is difficult to guarantee, and packet loss illusion is easily caused.

The invention discloses an enhanced Byzantine consensus method and device in a distributed system and a readable storage medium, and relates to the technical field of block chain network communication. The method comprises an initialization process and a consensus process. The initialization process comprises grouping and determining a group leader node; the consensus process comprises a request stage, a pre-preparation stage, a preparation stage and a response stage; after receiving the pre-preparation message broadcasted by the master node, the node judges that the node is a group leader node and verifies that the master node information is correct, consensus is continued, and the pre-preparation message is put into a temporary storage pool; and when the node receives the preparation message broadcasted by the group leader node and judges that the node is the group leader node or the main node, the node judges that the consensus is effective and stores the consensus in a local storage pool after receiving the preparation message broadcasted by more than 2f + 1 nodes. According to the method, the communication overhead between the nodes can be effectively reduced, the system throughput is improved, and the system reliability and the Byzantine fault-tolerant capability are improved.

The invention provides a camera calibration method, device and system and a storage medium, and relates to the technical field of cameras, and the scheme comprises the steps: obtaining at least one to-be-calibrated image; wherein the at least one to-be-calibrated image is an image collected by the second camera at different visual angles; according to the camera parameters of the first camera, obtaining first feature data for the feature data of the at least one to-be-calibrated image; and sending the first feature data to the second camera, wherein the first feature data is used for carrying out calibration processing on camera parameters of the second camera. The method can reduce the cost of calibration work and improve the calibration efficiency of the camera.

This invention discloses a smart contract execution method in data asset transactions, belonging to the field of smart contract execution technology. The method includes: based on multiple transaction nodes triggered during smart contract execution, a reputation value is obtained based on the historical transaction execution of each transaction node for hierarchical selection, resulting in a verification layer and an execution layer, each containing multiple transaction nodes; based on each transaction node in the verification layer, signature validity verification is performed, and the validity verification pass rate is compared with a first threshold; in response to a validity verification pass rate greater than or equal to the first threshold, based on the multiple transaction nodes in the execution layer, some transaction nodes are selected for cross-validation, and the cross-validation pass rate is compared with a second threshold; if the cross-validation pass rate is less than the second threshold, cross-validation is performed on all transaction nodes in the execution layer for transaction execution judgment; if the cross-validation pass rate is greater than or equal to the second threshold, the transaction is executed.

The invention provides a microgrid block chain rapid transaction method based on optimized PBFT. The method comprises the following steps: firstly, collecting transaction history and output stability parameters of distributed energy nodes (DERs) in a microgrid, and establishing a dynamic credit scoring model; then, a verifiable random function is utilized to elect a consensus leader from candidate nodes, and a safety access mechanism adapting to topological changes is formed; and the leader node generates a variation Schnorr signature in combination with the electric energy transaction data and the state timestamp of the power distribution network, and transmits the variation Schnorr signature in the logic fragment through multicast. And verifying the replica node, generating a partial signature and aggregating the partial signature to realize message compression. And finally, verifying the aggregated signature in batches, updating the credit score and asynchronously caching the block. According to the method, communication congestion and delay of the PBFT in high-frequency transactions are relieved, and the system throughput and scheduling stability are improved.

The application discloses a kind of intelligent contract execution methods in data asset transaction, belong to intelligent contract execution technical field, comprising: according to the multiple transaction nodes triggered when intelligent contract execution, according to the credit value of each transaction node historical transaction execution judgment, to carry out hierarchical selection, obtain verification layer and execution layer, verification layer and execution layer all include multiple transaction nodes;Based on each transaction node of verification layer, the legality verification of signature is executed, and the legality verification pass rate is compared with the first threshold value;In response to the legality verification pass rate greater than or equal to the first threshold value, based on the multiple transaction nodes of execution layer, extract part of transaction node to execute cross-validation, and the cross-validation pass rate is compared with the second threshold value;If cross-validation pass rate is less than the second threshold value, then based on the cross-validation of all transaction nodes of execution layer, for transaction execution judgment;If cross-validation pass rate is greater than or equal to the second threshold value, then transaction execution.

The present invention discloses a consensus method of alliance blockchain based on PBFT improvement, specifically: before consensus is reached, nodes have a unified initial throughput index, the initial consensus node is generated by a configuration file, and whether there is a node change is checked and the total number of nodes is changed; the master node sends a legal request signature to all nodes, and executes the improved PBFT consensus. If the master node is detected to be a malicious node, the consensus is temporarily interrupted, and then it is checked whether a view change is required. If an attempt is made to change, the ViewChange process is executed to update the view round; if the master node is not detected to be abnormal, the node generates a reply message and sends it to the client, and the client completes the consensus after receiving f+1 reply messages. The method of the present invention can improve the efficiency of consensus, realize the dynamic addition and exit of nodes when the cluster is not shut down, eliminate malicious nodes, ensure the security of the blockchain and reduce communication overhead.

This invention discloses a group train tracking operation optimization method considering communication delay, comprising the following steps: establishing a heavy-haul railway train group with a "leader-follower" topology; constructing a multi-objective optimization model based on vehicle characteristic constraints, speed limits, and safety distance constraints; generating random communication delays in the model, calculating the time steps corresponding to the delays, and having the following train make control decisions based on the state information of the preceding train at the previous time step; and solving for the running speed of the following train in the multi-objective optimization model using a particle swarm optimization algorithm. This group train tracking operation optimization method effectively solves the problems of uncertainty and dynamic response lag caused by communication delays during the tracking operation of heavy-haul railway train groups. It can not only significantly reduce tracking errors between trains and improve speed synchronization, but also effectively reduce distance fluctuations during acceleration and deceleration phases, ensuring stable train spacing.

The invention belongs to the technical field of block chains, and particularly discloses an asynchronous Byzantine consensus fault tolerance method based on consistent broadcast and a fast path. According to the application, the transaction is packaged, and a delivery block is determined in a mode of broadcasting the packaged block to other consensus nodes by adopting a linear consistency broadcast protocol; the local timeout device is used for starting other consensus nodes; if the fast message from the target consensus node is received before timeout, verifying the correctness of the fast message; and when the verification is passed, marking the delivery block according to the submittable label, and submitting the marked delivery block through the fast path. Through the above mode, the linear consistency broadcast protocol is adopted to replace a conventional reliable broadcast protocol, the communication complexity of block broadcast is reduced, the fast path is set, the fast path is preferentially performed under the condition that the network is good or no Byzantine behavior exists, and the number of communication rounds is reduced, so that the communication overhead and delay of consensus can be effectively reduced.

The embodiment of the invention provides a privacy information extraction method based on a post-quantum cryptography primitive, which is applied to a server and comprises the following steps: arranging data elements stored in a database in a linear structure according to a matrix form; determining a first area in a database according to a historical plaintext retrieval request under a non-privacy computing scene; encrypting a first position coordinate of each data element in the first region in the database matrix to generate a first encryption result, and storing the first encryption result in a cache; under the condition of receiving a ciphertext query request sent by the client, encrypting a second position coordinate of each data element in a second region in the database in the database matrix to generate a second encryption result; determining target ciphertext data corresponding to the ciphertext query request according to the ciphertext query request, the first encryption result and the second encryption result; and the query response message is sent to the client, so that the efficiency of the client for acquiring the data from the server is improved.

The invention discloses a communication method and an electric bicycle, and relates to the technical field of communication of electric bicycles. The communication method comprises the following steps: acquiring a data frame which is a UART (Universal Asynchronous Receiver / Transmitter) communication signal or an SIF (Subscriber Identity Function) communication signal; the data frame is preset to be a UART communication signal; monitoring the level pulse width of the data frame, specifically, when the data frame received in a preset time window has more than or equal to three high-low level changes, judging that the data frame is a UART (Universal Asynchronous Receiver / Transmitter) communication signal, and switching to a UART communication mode; and otherwise, judging that the data frame is an SIF communication signal, and switching to an SIF communication mode. By adopting the technology provided by the invention, the UART communication mode and the SIF communication mode can be switched without additionally arranging an additional communication module, and the communication complexity of the battery management system is further reduced.