37 results about "Logical clock" patented technology

The invention discloses an IT asset fault propagation prediction method and system based on dynamic evolution of a knowledge graph, and relates to the technical field of cloud computing and large-scale IT operation and maintenance management. Through an asynchronous message bus and a logic clock, the knowledge graph is updated immediately when resources are abnormal and a scheduling event occurs; the knowledge graph uniformly integrates physical connection, logic dependence and multi-copy redundancy, so that the cross-machine-room asset relationship is clear at a glance. And then, based on a weighted logistic regression model, node features and relation weights in the knowledge graph are fused, the node fault probability is accurately calculated, the limitation of traditional single-dimensional analysis is solved, self-healing operation is supported, end-to-end intelligent operation and maintenance from fault detection to prediction and early warning to closed-loop self-healing are realized, and the fault detection efficiency is improved. The problems that in a cross-machine-room and multi-live-site environment, resource topology is split, real-time state and alarm information cannot be fused with an asset dependence model, and large-scale real-time deployment of a traditional single-dimensional fault analysis and high-complexity prediction algorithm is difficult are effectively solved.

The invention provides a data stream parallel acceleration processing method and system in chip design, and relates to the technical field of chip design, and the method comprises the steps: partitioning a data stream through a preset scale, building a computing resource pool with graded computing power and a storage resource pool with graded access speed, and achieving the optimal distribution of storage resources and calculation tasks; dividing parallel processing units, and determining a data processing sequence; setting a shared cache area to establish a distributed cache synchronization network, and realizing synchronization control based on a cache identifier and a Lamport logic clock mechanism; and generating a resource competition degree matrix, and rearranging the task according to the access popularity map. According to the method, the data stream processing efficiency and the resource utilization rate of the chip are improved, and resource competition conflicts are reduced.

The invention discloses a distributed simulation method and a simulation system for centralized railway dispatching. The distributed simulation method comprises the steps of constructing a system overall architecture, constructing a simulation node management mechanism, constructing a simulation clock management mechanism, constructing a simulation task management mechanism and outputting a simulation result. According to the invention, the actual requirements of the centralized dispatching system in the aspects of simulation, training, experimental verification and the like are met, and the calculation experiment function in various emergency scenes is realized; a clock management method combining a physical clock and a logic clock realizes alignment and synchronization of node clocks at all levels under distributed speed multiplication simulation; the synchronous control of the task of each level of node under the distributed multi-speed simulation is realized.

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.

The invention discloses a 1588 network card device, system, equipment and medium supporting synchronous clock resource virtualization, and belongs to the technical field of power system energy storage equipment, comprising clock synchronization, network card resource virtualization and network card clock virtualization. The clock synchronization comprises neighbor rate ratio, delay measurement, time offset and time convergence state offset; the network card resource virtualization comprises a physical function and a virtual function; the network card clock virtualization comprises a bottom-layer physical clock source, a virtual logic clock source, a PFTIMER and an upper-layer virtual timer, and has the beneficial effects that three core problems of multi-clock domain management, virtual machine clock isolation and high-precision timing in a multi-core heterogeneous system are solved through a hardware clock virtualization layered architecture; the complexity of system software is remarkably reduced, the real-time performance is improved, and a basic clock support is provided for a next-generation intelligent network card.

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.

The integrated circuit (IC) device includes a first IC chip (110), a second IC chip (120), and a chip-to-chip interface (112) connected between the first IC chip (110) and the second IC chip (120). The chip-to-chip interface (120) communicates an interface clock signal and a logic clock signal between the first IC chip (110) and the second IC chip (120). The interface clock signal is synchronous with a data signal received by one of the first IC chip (110) and the second IC chip (120). The logic clock signal is asynchronous with the data signal.

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 an event-triggered low-overhead time synchronization method for industrial Internet of Things, and belongs to the field of industrial Internet of Things. According to the method, a node updates logical clock drift and offset compensation parameters in a set update period, and uses an estimator to estimate real-time clock states of neighbor nodes to construct a dynamic threshold; state error increases with the accumulation of absolute time until the dynamic threshold is exceeded, thereby triggering broadcast. In addition, a simple trigger condition is added to improve the convergence speed in the early stage. Through continuous update iteration, global consistency of network logical clocks is achieved. The application considers the problems of excessive time-triggered communication overhead and the fact that nodes cannot be stably triggered and triggering is uneven in the event-triggered mechanism under the random topology environment of industrial Internet of Things, improves synchronization accuracy without increasing additional communication overhead, and reduces the congestion probability of a shared network.

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.

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 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 invention discloses a graphical multi-modal agent-oriented construction platform, relates to the technical field of artificial intelligence and graphical programming, and is used for solving the problem of result timeliness caused by dependence on management during existing multi-task parallel execution. According to the platform, graphical programming interfaces of a programming area and a stage area are adopted, and the capabilities of large models such as vision, voice and text are packaged into large model building blocks capable of being dragged for communication; a large model communication unit, a communication state detection unit, a communication result data storage unit and a communication result data processing unit form a data closed loop, meanwhile, a heterogeneous task asynchronous collaborative scheduling module discovers a task parallel calling model with the in-degree being zero in real time, and result consistency is kept in combination with a logic clock version stamp and a failure event; the problems of timeliness and resource waste caused by multi-task dependence are solved, and code-free construction, elastic stretching and fault self-healing are achieved.

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.

Determining a failure recovery line in a distributed scaleout computing system. Each node or process of a distributed system has or is associated with a vector clock that includes a logical clock for each node in the distributed system. When failure is detected, a recovery operation may be performed using the vector clock. After the recovery operation, the vector clock is updated such that the failure recovery line is available in the computing system.

This document describes systems and techniques for detecting stuck-at-fault (SAF) defects at input pins of a memory device. For example, a system includes a memory device to receive data and address inputs. A clock interface is configured to generate a memory clock signal according to a first clock signal received at a clock input. A logic interface is configured to provide the inputs to the memory device during a shift cycle according to a second clock signal received at a logic clock input. A test interface is configured to receive a system clock signal and to selectively adjust the first clock signal and the second clock signal to cause address signals presented to the address inputs and data signals presented to the data inputs to cause the memory device to capture the inputs from a previous shift cycle or a current shift cycle to enable identification of stuck-at-fault defects.

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.