36 results about "Cyclic scheduling" patented technology

A method is provided for generating a feasible schedule for n jobs given a duration and a revisit time for each job. The method comprises determining whether it is impossible to generate a feasible schedule, determining whether a round robin schedule is possible, calculating theoretical probabilities, calculating actual probabilities, creating a potential schedule based on the theoretical probabilities and the actual probabilities, and searching for a feasible schedule from the potential schedule.

The invention discloses a three-phase balance dispatching method and device based on phase-change switches. The method is characterized by, calculating a predicted power value of each phase-change switch under a current time period through analysis of historical power data; then, carrying out simulated reality cyclic scheduling based on three-phase power and the predicted power value of each phase-change switch to find out a switching set of the phase-change switches; and finally, sending a phase-change instruction in the switching set to the corresponding phase-change switch. Compared with the prior art, the method does not judge whether the three phases are balanced directly, but judge whether the three phases are balanced by judging whether the switching set of the phase-change switches obtained through simulated reality cyclic scheduling is null.

The embodiment of the invention discloses a session processing method and device, equipment and a storage medium. The method comprises the following steps: when it is detected that a session node corresponding to a currently received message is not stored in a cache unit set, creating the session node corresponding to the message, determining a first absolute timeout time based on the current timeand a relative timeout time corresponding to the session node, and storing the first absolute timeout time and information of the message in the created session node; determining a target cache unitcorresponding to the session node according to the scheduling start time and the first absolute timeout time corresponding to the cache unit set, and storing the created session node into the target cache unit, wherein the cache unit set comprises a plurality of cache units which are sequentially arranged, and each cache unit is sequentially and circularly scheduled according to the arrangement sequence so as to carry out timeout maintenance on session nodes stored in each cache unit, thereby improving the session timeout maintenance efficiency, saving equipment resources and improving the processing performance.

The embodiment of the present application provides a task scheduling method and device, wherein the method includes: obtaining a task scheduling request; the task scheduling request carries the task path corresponding to the task to be executed; according to the task path corresponding to the task to be executed and the task configuration information, determine the Execute the result output path and execution method corresponding to the task respectively; send the task path, result output path, and execution method corresponding to the task to be executed to the task execution device to execute the task; after determining that the task to be executed is successfully executed, the The result output path corresponding to the execution task is re-used as the task path corresponding to the task to be executed; the above process is repeated until the cyclic scheduling and execution of the task ends. Through the embodiment of the present application, the maintenance cost of task scheduling can be reduced, and the efficiency of task execution can be improved.

The invention discloses a scheduling method and device for a regular tetrahedral topological network. Node No. 1, Node No. 2, Node No. 3 and Node No. 4 in the regular tetrahedral topological network respectively follow the scheduling sequence [4,3,2, 0,0,0], [0,0,1,3,4,0], [0,1,0,2,0,4 and [1,0,0,0,2,3] for data scheduling ; Among them, the scheduling sequence of four nodes constitutes a round-robin scheduling table, the length of the time slot for executing the round-robin scheduling table is one-third of the propagation delay, and the frame length is twice the propagation delay, and the numbers in the scheduling sequence represent the current A time slot sends a data packet to the node corresponding to the number, and 0 indicates receiving a data packet in the current time slot. The invention realizes full-connection fair and perfect scheduling of the regular tetrahedral topology network of four nodes by equally dividing the propagation time delay.

A control method for heating electric boilers to participate in the primary frequency regulation of the power grid, which is used to solve the problem of insufficient primary frequency regulation capability of the power grid due to complex and changeable power loads and large-scale grid connection of unstable power sources such as wind power. The method comprises the following steps: a. calculating a frequency modulation command; b. designing a frequency modulation filtering logic to filter the calculated frequency modulation command; c. performing cycle scheduling on the electric heater according to the filtered primary frequency modulation command. The present invention adds a frequency modulation instruction filtering logic and cycle scheduling logic in the control process of heating electric boilers participating in the primary frequency modulation of the power grid, which not only avoids the frequent action of the electric boiler heater switch, but also realizes the average use of each heater, thus prolonging The service life of the equipment. The invention can greatly improve the primary frequency regulation capability of the power grid and ensure the stable operation of the power grid.

Since single and dual-arm tools behave differently, it is difficult to coordinate their activities in a hybrid multi-cluster tool that is composed of both single- and dual-arm tools. Aiming at finding an optimal one-wafer cyclic schedule for a treelike hybrid multi-cluster tool whose bottleneck tool is process-bound, the present work extends a resource-oriented Petri net to model such system. By the developed Petri net model, to find a one-wafer cyclic schedule is to determine robot waiting times. By doing so, it is shown that, for any treelike hybrid multi-cluster tool whose bottleneck tool is process-bound, there is always a one-wafer cyclic schedule. Then, computationally efficient algorithms are developed to obtain the minimal cycle time and the optimal one-wafer cyclic schedule. Examples are given to illustrate the developed method.

The invention discloses a method for scheduling a service queue, which comprises the following steps of: establishing a plurality of service queues on a network element; using the network element to measure a service quality (Qos) parameter of a service flow on each Real-time Transport Protocol (RTP) passage in a transmission layer; using the network element to distribute the service flow on eachRTP passage to corresponding service queue in a network layer; adjusting a band width of each service flow and a weight value of the service queue according to the Qos parameter of each service flow and sending the service flow in each service queue to a lower layer according to weighted cyclic scheduling. Meanwhile, the invention also discloses a device for scheduling the service queue. According to the scheme of the invention, cross-layer optimized scheduling of the service queue can be realized, and the band width of the service flow and the weight of the service queue can be adjusted in real time.