24 results about "Logical clock" patented technology

The invention provides a self-adaptive collaborative security protection method based on attack path deduction, a medium and a system, and belongs to the technical field of network security. The method comprises the following steps: sampling possible paths from a current attack node to high-value assets based on an adaptive path sampling algorithm of Monte Carlo tree search to generate an attack path graph, calculating a protection effectiveness score and a service influence score according to key nodes and predicted attack actions, and generating an optimal protection instruction set based on a multi-target tradeoff function; an instruction is converted into a heterogeneous security device configuration command through a strategy execution cooperative controller, multi-device synchronous activation is realized by adopting a distributed transaction protocol based on a logic clock, and a protection effect is monitored and fed back to an artificial intelligence model for parameter optimization; the problem of protection strategy failure caused by asynchronous network security protection response and attack evolution is solved.

The invention discloses a distributed database backup method and device and a medium, and relates to the field of databases, the method comprises the following steps: receiving a backup instruction of a target database, analyzing the backup instruction, extracting a backup type and a backup target range in the backup instruction, and generating a corresponding backup task; when the full backup task is executed, an initial logic clock is generated, and an initial blood relationship topological graph is constructed; creating a full-amount atomic snapshot, partitioning the full-amount atomic snapshot and storing the full-amount atomic snapshot into a corresponding physical backup medium to generate full-amount metadata; when the incremental backup task is executed, historical backup metadata is obtained, a change log in the target database is scanned according to a historical logic clock, and the historical blood relationship topological graph is updated based on a change record; determining a newly-added storage unit, creating a newly-added atomic snapshot, and storing the newly-added atomic snapshot in a physical backup medium; incremental metadata is generated. The integrity and accuracy of incremental data are ensured, and the risk of data omission or wrong backup is reduced.

Data relating to a token issued to a client 102 is stored in a cache 128-1 and comprises a first hybrid logical clock, HLC, value associated with a user of the client. A token server 106-1 receives a

The application provides a system and method for safe transmission of FC data through high-speed port, which comprises: a high-speed port for receiving data and generating a high-speed port recovery clock, and transmitting the received data to a data transceiver module in the high-speed port recovery clock domain; and the data transceiver module for converting the data into output data in the local logic clock domain; wherein the data transceiver module comprises a data storage area, a write control module and a read control module; the data storage area is composed of two clock domains: the write direction adopts the high-speed port recovery clock, and the input data is the high-speed port received data; and the read direction adopts the local logic clock, and is used for controlling the output of the data storage area to a subsequent logic module. The data storage area is configured with an overflow area, an underflow area and an equalization area, and the input and output enables of the fifo are accurately controlled through the data amount cached in the fifo and the current input and output fifo data stream content, so as to ensure the correct transmission of effective data and the normal work of the fifo.

This invention provides a distributed time synchronization method suitable for UAV swarms, comprising: Step 1: Synchronization information exchange between adjacent nodes of the UAVs; Step 2: Propagation delay compensation, using the synchronization interaction information received from neighbors within the synchronization period of Step 1 to compensate for the time-varying propagation delay timestamps; Step 3: Logical clock adjustment parameter update, combining the previously obtained synchronization information to estimate and update the logical clock parameters, completing the final time synchronization; Step 4: Reinforcement learning-based adaptive selection of the synchronization period, using an adaptive period decision mechanism based on reinforcement learning to dynamically and adaptively output the optimal synchronization broadcast period in the current state. This method overcomes the synchronization error caused by time-varying propagation delay in high-mobility environments; it adaptively adjusts the synchronization interaction period according to the actual clock state of the swarm, effectively reducing the system's communication overhead and energy consumption while ensuring high-precision time synchronization.

The application discloses a network security attack and defense target range system and method based on simulation, and particularly relates to the technical field of network security protection, and is used for solving the problem of insufficient actual combat detection of the network security target range; the application generates a technical unit set and an attack path atlas by constructing an asset atlas and threat knowledge of an access adversary model, supports automatic arrangement and execution of an attack plan in a simulation environment, then fuses observable point configuration, a time sequence anomaly detection model and a process variable consistency checking mechanism, improves the accuracy of anomaly identification, utilizes a unified time reference and a logical clock label to construct a single time line that can be traced back, ensures the integrity of a detection response causal chain, introduces a differential packet and a double-track strategy warehouse, realizes gray release and safe rollback of a rule graph and parameters, enhances the dynamic adaptation and evolution ability of a strategy, and thus significantly improves the actual combat verification ability and response closed loop effect of the network security protection system.

The application provides a design method and system of a logical clock synchronization algorithm for a distributed system, comprising initializing a local logical clock service, configuring logical clock parameters and other node information of the distributed system; starting a local timing daemon thread, checking whether to time out at intervals, broadcasting local logical time information to all other nodes if time out, and resetting a remaining waiting time value; when a node communicates with other nodes in the system, calculating a probability and unicasting local logical clock information to a communication node at the other end according to the probability; if a communication receiving end node receives logical clock information from the other end, checking a local logical clock, updating the clock as needed, and halving the remaining waiting time value of the daemon thread. The application solves the problem of clock asynchronization in a distributed system and solves the problem of global event ordering in the distributed system. The application realizes global event total ordering in a performance-limited distributed system by improving a classical Lamport timestamp.

A distributed, transactional database uses timestamps, such as logical clock values, for entry versioning and transaction management in the database. To write to the database, a service requests a timestamp to be inserted into the database with a new version of data. During a backup procedure, a cleanup process is paused, issuing new timestamps is paused, and a backup timestamp is generated, which results in an effective backup copy. During a restore of a backup, a snapshot of the database is loaded and any entries older than the backup timestamp are deleted, which ensures that a consistent restore has occurred.

The invention discloses a mobile game cross-platform real-time interaction optimization method and device based on cloud data synchronization, and belongs to the technical field of electric digital data processing, and the method comprises the following steps: collecting parallel operation instructions from clients and servers, and collecting the parallel operation instructions to form a decision event set of a current logic frame; generating a candidate decision event pair and calculating a decision overlapping index, and when the decision overlapping index is greater than a decision overlapping index threshold, constructing a decision dependence directed graph; forming a comprehensive judgment sequence; a sequence stability evaluation parameter set is calculated, whether an unstable risk exists or not is judged, sequence compensation adjustment is executed when the unstable risk exists, and if not, judgment processing is executed according to a comprehensive judgment sequence; and if a cloud logic node migration event is detected in the sequence compensation process, phase correction adjustment is performed on a new node logic clock, and the logic clock propulsion rate is adjusted, so that the problem of partial sequence judgment caused by non-exchangeability of state update under parallel judgment of multiple logic threads in the prior art is solved.

The application discloses a hand game cross-platform real-time interaction optimization method and device based on cloud data synchronization, and belongs to the technical field of electronic digital data processing, and comprises the following steps: collecting parallel operation instructions from each client and a server, and collecting to form a decision event set of a current logical frame; generating a candidate decision event pair and calculating a decision overlap index; when the decision overlap index is greater than a decision overlap index threshold value, a decision dependence directed graph is constructed; a comprehensive decision sequence is formed; a sequence stability evaluation parameter set is calculated, and whether there is an unstable risk is determined; when there is an unstable risk, sequence compensation adjustment is performed, otherwise, decision processing is performed according to the comprehensive decision sequence; if a cloud logical node migration event is detected in the sequence compensation process, the phase correction adjustment of a new node logical clock is performed, and the adjustment of a logical clock advancing rate is performed, and the problem of the decision partial order caused by the non-commutativity of state update under the parallel decision of multiple logical threads in the prior art is solved.

The invention is suitable for the technical field of databases, and relates to a log analysis method and device, computer equipment and a computer readable medium. Wherein a logic log record corresponding to a transaction is obtained in response to analysis of the redo log, and whether the current time reaches a check point triggering period or not is recognized; if the current time reaches the check point triggering period, determining a target active transaction which is started earliest from the active transactions, and taking a redo log starting point corresponding to the target active transaction and a system logic clock corresponding to the logic log record as candidate check points for associative storage; responding to a received application system logic clock returned by the log application end, and determining a target candidate check point matched with the application system logic clock in the stored candidate check points; and configuring a redo log starting point in the target candidate check points as a formal check point of the redo log. According to the invention, the memory overhead required for promoting the check point can be reduced.

An electronic device is provided. The electronic device includes: a plurality of scan stages, wherein a first scan stage of the plurality of scan stages is configured to receive a logic clock signal, a clock signal, and a carry signal, and output a scan signal; and a plurality of clock lines connected to the plurality of scan stages, respectively. The plurality of clock lines include a logic clock line configured to provide the logic clock signal to the first scan stage and a scan clock line configured to provide the clock signal to the first scan stage, and when viewed in a plan view, the logic clock line overlaps the plurality of scan stages, and the scan clock line is offset from the plurality of scan stages.

The application provides a multimodal data time synchronization, labeling and edge inference method and system, and relates to the technical field of cognitive evaluation. The multimodal data time synchronization, labeling and edge inference method comprises the following steps: collecting multimodal data; using a global logical clock + network time protocol + sliding window drift correction method to align the time of the multimodal data; identifying three dimensions of a task phase, a behavior event and an emotional state, and outputting three types of annotation labels; deploying an edge inference model, and automatically triggering cloud review when the confidence is lower than a threshold; generating a unique timestamp and a task identification for each collected frame, and establishing a unified log database in the cloud. The application combines a time sequence correction algorithm and AI model annotation logic in depth, realizes millisecond-level time alignment and intelligent labeling of multimodal data, and solves the technical problems of asynchronous data, high delay and large amount of manual labeling in the cognitive evaluation and rehabilitation training scene.

This invention relates to the field of cloud computing resource management technology and discloses an AI-based dynamic scheduling and operation and maintenance system for large-scale data center computing resources. The system includes a kernel status monitoring module, a scheduling priority quantification module, a resource configuration retrieval module, and a synchronous clock scheduling execution module. It collects the system call trajectory of the task to be scheduled in the kernel state and the synchronous blocking state of the network protocol stack, extracts runtime characteristic data representing the execution phase, and calculates the scheduling urgency index by combining the topological weights of the task's directed acyclic graph. Then, it matches the target control group quota and writes the target control group quota into the resource limit parameter file when the task enters the communication waiting window. This invention locks the resource quota update action within the task's logical rest period, effectively eliminating the kernel state context switching overhead caused by computing power scheduling, ensuring the logical clock consistency of large-scale parallel computing tasks, and improving the global turnover efficiency of the resource pool.

The invention discloses a network security attack and defense target range system and method based on analogue simulation, particularly relates to the technical field of network security protection, and is used for solving the problem of insufficient actual combat detection of a network security target range. According to the method, the asset atlas and access opponent model threat knowledge are constructed, a technical unit set and an attack path atlas are generated, automatic arrangement and execution of attack plans in a simulation environment are supported, then configuration of the observable points, a time sequence anomaly detection model and a process variable consistency checking mechanism are fused, the anomaly recognition accuracy is improved, and the method is suitable for being applied to a simulation environment. And constructing a traceable single timeline by using a unified time reference and a logic clock label, ensuring the integrity of a detection response causal chain, introducing a differential packet and a double-track strategy bin, realizing gray release and safe rollback of a rule graph and parameters, enhancing the dynamic adaptation and evolution ability of a strategy, and improving the accuracy of the detection result. Therefore, the actual combat verification capability and the response closed-loop effect of the network security protection system are obviously improved.

A split-logic-clock-buffer (split-LCB) includes an input clock stage configured to receive an input clock signal, an output drive stage configured to output an output clock signal, and a clock distribution network interposed between the input clock stage and the output drive stage. The clock distribution network is configured to route the input clock signal to the drive output stage. The output drive stage includes an temperature sense circuit region that splits the output drive stage into an upstream drive portion and a downstream drive portion.

The purpose of this application is to provide a continuous recording method and device based on winter / summer time switching. By introducing a monotonically increasing logical clock (MLC) decoupled from physical time, constructing a dynamically updated time mapping table, and implementing a dual timestamp metadata embedding strategy of physical time and monotonically increasing MLC, and using time mapping table-based retrieval logic, this method systematically solves the technical problems faced by existing surveillance recording devices in winter / summer time switching scenarios, such as recording loss, duplication, retrieval failure, and time misalignment. This application does not rely on specific operating system features and can be implemented on general embedded Linux or RTOS platforms, exhibiting high engineering feasibility and product compatibility.

This application provides a transaction processing method applicable to different transaction processing in a distributed storage system. It can improve the accuracy of the arrangement between different transactions by using a transaction management device to synchronize the logical clock of the index modules on the storage nodes involved in the transaction, thereby reducing the inaccuracy of transaction processing results caused by conflicts between different transactions in the distributed system.

A blockchain transaction allocation method performed by any node in a blockchain system includes: determining a bootstrap block pointed to by a target block of a transaction to be allocated, where the bootstrap block is a legal block with a maximum logical clock detected by a local node when generating the target block; determining a consensus member group for allocating a target transaction based on the bootstrap block, and generating a target tag hash based on a transaction hash of the target transaction and a block hash of the bootstrap block; assigning a node number to a target node assigned to the target transaction based on the target tag hash and the total quantity of nodes in the consensus member group; and if the node number of the target node is the node number of the local node, adding the target transaction to the target block.

Embodiments of the present application provide a blockchain transaction allocation method and device, applied in the field of blockchain technology, comprising: determining a guide block pointed to by a target block of a to-be-allocated transaction, the guide block being a legal block with the largest logical clock monitored by a local node when generating the target block; determining a consensus member group for allocating the target transaction based on the guide block, and generating a target marker hash based on a transaction hash of the target transaction and a block hash of the guide block; allocating a target node number for the target transaction based on the target marker hash and a total number of nodes in the consensus member group; and if the target node number is a node number of the local node, adding the target transaction to the target block. By allocating transactions to target nodes for processing, the problem of transaction duplication in a high-concurrency blockchain system can be effectively solved, and the actual transaction processing capacity of the blockchain network can be significantly improved.

The invention relates to the technical field of computer network communication, and discloses a BS-based page plug-in-free communication system, which runs in a Service Worker environment, intercepts a view layer request through a virtual gateway layer, and establishes a unique streaming backbone tunnel with a server by using a standard HTTP protocol. A request interception and serialization module is arranged in the system, a global time sequence label is distributed for a concurrent request by maintaining a virtual logic clock, and a strict total-sequence data frame sequence is constructed; a transactional sender box module is adopted, data are synchronously written into local persistent storage before network sending, and data integrity is ensured. And when monitoring that the network is abnormal, the failover reconstruction module freezes a sending state, and performs data sequence replay based on a breakpoint confirmed by the server after connection reconstruction. According to the method, the problem of resource consumption of multi-tab connection is solved, the service logic sequence consistency is guaranteed, and persistent disaster recovery and network-off non-inductive recovery of communication data are realized.

The invention provides a transaction processing method for a distributed cluster, and relates to the technical field of distributed storage, the distributed cluster comprises a fragment routing manager, a global transaction coordinator, a global logic clock and a concurrency controller, and the method comprises the following steps: the fragment routing manager forwards a transaction processing request to the global transaction coordinator; the global transaction coordinator determines an area involved by a target transaction requested to be processed to obtain a first area and a second area, and applies for a timestamp for submission of the target transaction from a global logic clock; the global logic clock generates a global submission timestamp according to the region clock information of the two regions and the clock offset between the first region and the second region; the global transaction coordinator instructs the concurrent controllers of the two regions to apply main locks to respective fragmented data by using the global submission timestamps and then perform preprocessing; and the global transaction coordinator instructs the concurrent controllers of the two regions to submit the respective preprocessed fragmented data by using the global submission timestamps.

The invention provides a multi-modal data time synchronization and annotation and edge reasoning method and system, and relates to the technical field of cognitive evaluation. The multi-modal data time synchronization and annotation and edge reasoning method comprises the following steps: carrying out multi-modal data acquisition; a global logic clock + network time protocol + sliding window drift correction method is adopted to align the time of the multi-modal data; identifying three dimensions of a task stage, a behavior event and an emotional state, and outputting three types of annotation tags; deploying an edge inference model, and automatically triggering cloud rechecking when the confidence coefficient is lower than a threshold value; a unique timestamp and a task identifier are generated for each collection frame, and a unified log database is established at the cloud. According to the method, a time sequence correction algorithm and AI model annotation logic are deeply combined, millisecond-level time alignment and intelligent annotation of multi-modal data are achieved, and the technical problems of data asynchronization, high delay and large manual annotation amount in cognitive evaluation and rehabilitation training scenes are solved.