125 results about "Fixed time" patented technology

A fixed time anti-interference sliding mode tracking control method for an under-actuated bridge crane comprises the following steps: firstly, designing a disturbance observer which can converge in fixed time and is used for accurately estimating disturbance in a system so as to provide effective disturbance compensation information for a subsequent control strategy; secondly, in combination with the fixed time disturbance observer, a sliding mode controller is provided to ensure that the crane can accurately track a given trajectory and enable a tracking error to converge to a sliding mode surface within a fixed time. According to the invention, accurate positioning of the trolley can be realized, and load swing can be effectively inhibited in a complex environment. According to the method, the control precision and robustness of the under-actuated bridge crane in a disturbed environment can be remarkably improved, and an effective solution is provided for crane control under complex working conditions.

The invention belongs to the technical field of unmanned ship control, and particularly discloses a control method of a fixed time event triggering terminal sliding mode with preset performance constraints. The control method comprises the following steps: S1, establishing an all-drive model of a multi-under-actuated unmanned ship system; s2, designing a fixed time disturbance observer; s3, constructing a cooperative tracking error system according to the cooperative control target and the interactive topological structure; s4, restraining and converting the cooperative tracking error by using a preset performance function, and updating a cooperative tracking error system; and S5, constructing a relative threshold event triggering mechanism, designing a distributed event triggering-fixed time terminal sliding mode controller, generating an actuator control instruction, and realizing cooperative tracking control of the system through an output instruction of an actuator. According to the method, the problem of fixed-time cooperative tracking control under the preset performance constraint is solved, two indexes of'rapid cooperative control 'and'communication resource saving' are realized at the same time, and the method is applied to a cluster scene of multiple unmanned ships.

The invention relates to a state switching system for an intelligent access control, and the system comprises a content mapping mechanism which is used for employing a deep neural network recognition model to intelligently predict the number of visitors and the number of owners corresponding to a set access channel where the intelligent access control is located in a fixed time interval of the day; and the strategy adjusting mechanism is used for setting the state of the intelligent access control in the fixed time interval of the day to be a normally open state in advance when the intelligently predicted visitor number is greater than or equal to the owner number. The state switching system for the intelligent access control is reliable in logic and has certain pertinence. As the visitor number and the owner number of a certain access channel of the target residential district managed by the intelligent access control in the future time interval can be intelligently predicted, when the intelligently predicted visitor number is greater than or equal to the owner number, the state of the intelligent access control in the future time interval is set to be a normally open state in advance, otherwise, the state of the intelligent access control in the future time interval is set to be a normally open state. And a normally closed state is set in advance, so that the intelligent level of intelligent access control management is improved.

The invention discloses a transformer fault sound detection and early warning method, and belongs to the technical field of transformer detection, and the method comprises the steps: collecting the working sound data of a transformer in a fixed time period, including frequency, amplitude and duration; according to the working sound data of the transformer, analysis is carried out based on a pre-trained fault sound detection model, a fault type is output, and fault early warning is carried out; wherein a layered attention mechanism, residual connection and a Mish activation function are introduced to improve the time delay neural network, and the fault sound detection model is constructed based on the improved time delay neural network and a large language model. According to the invention, the problem that the fault type of the transformer cannot be accurately and timely identified and automatic early warning cannot be carried out in the prior art is solved.

The invention provides a multi-agent system fixed time encircling control method under intermittent dynamic event triggering, and the method comprises the following steps: S1, constructing a directed topological graph and a Laplacian matrix of a multi-agent system according to an actual task; s2, constructing a dynamic model of the multi-agent system; s3, designing a multi-agent system fixed time encircling controller triggered by an intermittent dynamic event; s4, the controller designed in the step S3 is used for achieving surrounding control within fixed time, and the upper bound of convergence time is obtained; and S5, continuously operating until the encircling control of the multi-agent system is completed.

The invention provides a dynamic frame rate control multi-target tracking method based on reinforcement learning, and aims to improve the adaptive capability and tracking performance of a video processing system in a computing resource limited environment. According to the method, a video is divided into fixed time windows, multi-dimensional features including target motion features, frame rates, system state information and the like in the windows are extracted, and state vectors are constructed and input into a reinforcement learning model to predict frame rate adjustment actions of the next window. The system controls frame rate switching according to the action confidence, and calculates an award by comparing the current tracking performance with the reference performance for feedback policy performance. The method combines proportional frame rate control, frame rate smooth transition and a cooling period mechanism, realizes dynamic balance between tracking performance and computing resources, and is suitable for scenes of edge computing, intelligent monitoring and the like.

The invention discloses a base station energy saving method and device, electronic equipment and a storage medium, and relates to the technical field of base station energy saving control. Conflict judgment is performed on different operation scenes of the train by means of a dynamic time warping algorithm so as to adjust an energy-saving scheme, and then the adjusted scheme is executed according to road sections, so that the dynamic change of the operation state of the train can be fully considered; the method can solve the problem that in an existing base station energy-saving method, due to the fact that a fixed time period or a strategy based on historical data prediction is adopted, dynamic changes of the train running state are not fully considered, base station resource configuration is not matched with the actual access requirement of a user, and resource waste or communication interruption is caused. The technical effects of realizing accurate energy saving of the railway communication network, improving the resource utilization rate and guaranteeing the communication stability are achieved.

A computing device comprising at least one processing module carrying multiple execution units each with a local memory unit; and a local network of the processing module linking at least some of the execution units to each other by respective communication paths; wherein the execution units are configured to execute a binary code segment at least temporarily stored in their respective associated local memory unit and derived from a computer executable program code application containing application code sections; and wherein at least one of the execution units is designated for executing a binary code segment as an assigned binary code segment based on a pre-determined runtime schedule with fixed time slots during which the execution unit is granted exclusive access to at least one of the communication paths when executing the assigned binary code segment in line with a pre-defined running order of the application code sections.

Systems and methods are described for scheduling reciprocating fracturing pump transmission maintenance. Accelerometers recording spectra are coupled to the transmission, and spectra with timestamps are collected at a fixed time interval. From each spectra is generated statistical and characteristic frequency (CF) features. The statistical and CF features of each spectra where the pump is idle are removed; processed features are retained. Joined features are created by joining the processed features with time domain features, and then input into an anomaly detection model (ADM) that identifies at least one outlier data point in the joined features indicating a probability a failure of the transmission. A failure alert is generated and ranked produce a production impact score (PIS) based at least on the probability of the failure of the transmission being beyond a failure threshold. Based on the PIS, a remediation procedure is scheduled before a catastrophic transmission failure.

The invention discloses a transient performance enhancement-oriented multi-spacecraft attitude cooperative tracking control method, which provides a fixed time controller through an inversion control strategy, realizes quick response of a multi-spacecraft attitude system, and ensures that a consistency error is converged to a sufficiently small domain within fixed time. A fuzzy weight updating law is designed, dependence on system model information is reduced, and adaptability and high robustness are achieved. According to the asymmetric fractional obstacle Lyapunov function, adherence of multiple spacecrafts to time-varying constraints is guaranteed, meanwhile, the problem that the control amplitude related to a large constraint boundary in a traditional logarithmic obstacle Lyapunov function is too large is solved, and therefore the proposed method can process constrained and unconstrained scenes. A saturation threshold event triggering strategy is designed, a multi-spacecraft system is allowed to select three different triggering strategies by adjusting parameters, the transmission frequency of control signals is flexibly changed, and control bus resources are reasonably distributed.

The utility model discloses a receiving and feeding device for track iron tooth workpiece production, which comprises a feeding device, a blanking device, a controller and cylinder devices, the cylinder devices are symmetrically arranged on two sides of the feeding device, and each cylinder device comprises a cylinder main body and an ejector rod connected with the cylinder main body. According to the material receiving and feeding device for track iron tooth workpiece production, by means of flexibility and accurate control of the air cylinder, when the position of a workpiece deviates or inclines, the ejector rod can stretch out to abut against the workpiece, the position of the workpiece is corrected, and manual intervention is not needed; the air cylinder device carries out pushing work at a fixed time interval, and the problems of accumulation, collision and the like caused by uneven speed in the conveying process of the workpieces can be avoided.

The invention discloses a high-precision time synchronization method and system based on distributed airborne measurement, and the method comprises the following steps: employing a high-precision atomic clock as a system clock, transmitting the precise clock to slave devices at all levels, achieving the homology and the same frequency of the clock, and guaranteeing the time consistency of the timekeeping process of a local clock; clock and time service data are transmitted through high-speed optical fibers, independent optical fiber communication links are distributed, and the same clock and time service data receiving and transmitting module is used, so that the data transmission and receiving processing time of all levels of equipment in the time service process is fixed, and the fixed time delay can be measured through a specific means. And high-precision time synchronization is finally realized by compensating the fixed time delay. Based on the distributed design of airborne measurement, the index requirements of small design size and high synchronization precision of the master device and the slave device are met, the synchronization precision can reach 10ns, the slave device can be flexibly expanded, and the method is suitable for various distributed measurement systems or measurement and control systems with high requirements on time synchronization precision.

The invention discloses a single-wheel self-balancing rail inspection device and method based on sound detection. The single-wheel self-balancing rail inspection device comprises a single-wheel self-balancing rail inspection device body and a server terminal. The single-wheel self-balancing track inspection device is placed on a rail, the posture and the balance state of the inspection device are detected through a gyroscope in the moving process, a rail image is recognized through a tracking camera, and the single-wheel self-balancing track inspection device is controlled to keep a self-balancing state so as to perform tracking movement along the single rail. In the moving process, the rail is knocked at fixed time or fixed distance, sound is collected, sound data is transmitted to the server terminal for real-time sound detection, and the working condition of the rail is distinguished according to sound classification. According to the invention, the inspection device is driven by means of camera tracking, self-balancing control and single-wheel advancing, so that the inspection device can walk on a single rail and can be kept stable; meanwhile, sound generated by knocking the rail is collected, the sound is detected through a machine learning or deep learning method, the sound is recognized in a multi-classification mode, the rail working condition is judged, and sound-based rail abnormal working condition detection is achieved.

The invention relates to the technical field of virtual power plants, and discloses a dynamic aggregation management method of a virtual power plant edge computing cluster and cloud edge equipment, and the method comprises the steps: carrying out the clock synchronization processing of a virtual power plant cloud control center and an edge computing cluster node; based on communication records of the cloud control center and each edge computing cluster node in historical N control periods, respectively counting an average generation rate of period frames and an average generation rate of event frames; according to the period frame average generation rate, the event frame average generation rate, the preset time slot capacity and the event frame reservation proportion, a fixed time slot is divided for the period frame, and a reserved time slot is divided for the event frame, so that a time slot scheduling table is obtained; and according to the time slot scheduling table, enabling each time slot number to correspond to a switch gating list, and generating window opening time and duration according to a time slot sequence.

The invention discloses a fixed time inclusion control method and system for a second-order nonlinear multi-agent system, and the method comprises the steps: defining a state tracking error according to a control target, augmenting the state tracking error into a matrix form, and designing an integral sliding mode surface for suppressing disturbance; designing a distributed fixed time inclusion consistency protocol and a dynamic event triggering mechanism based on position information and speed information according to the integral sliding mode surface; and controlling the multi-agent system model to reach an integral sliding mode surface according to a distributed fixed time inclusion consistency protocol and a dynamic event triggering mechanism, then sliding on the integral sliding mode surface, and controlling the state of the multi-agent system model to realize inclusion consistency within fixed time. According to the invention, the energy consumption of the system and the updating frequency of the controller can be reduced, the service life of the system is prolonged, and under a new distributed fixed time inclusion consistency protocol, the system firstly reaches the sliding mode surface and then slides on the sliding mode surface, so that the inclusion consistency of the system state is finally realized within fixed time.

This invention relates to the field of algorithm module scheduling technology and discloses an algorithm module scheduling method, comprising: firstly, obtaining the page size, total page budget, draft acceptance rate, drafting module service rate, and verification module service rate of the key-value cache; calculating the expected length of the accepted prefix based on the draft acceptance rate and determining its target drafting depth aligned with an integer multiple of the page size; calculating the peak page occupancy of a single request based on the target drafting depth and obtaining the maximum concurrent micro-batch capacity by combining it with the total page budget; further determining the tick period based on the service rates of the drafting module and the verification module; and finally mapping requests to fixed time coordinates and slots in the order of arrival, outputting a scheduling result containing the target drafting depth and mapping relationship. This method can achieve high utilization of cached pages with fixed page resources, eliminate periodic fluctuations in concurrent capacity, and significantly improve the overall execution efficiency and stability of multi-module algorithm systems.

The invention provides a task scheduling method and device and a storage medium, and the method comprises the steps: determining a plurality of task groups and the expected execution time of each task group according to a mode demand inputted by a user; traversing each task group, determining the waiting time of the current task group according to the expected execution time of the current task group for the traversed current task group, and storing the current task group to the target storage object according to the waiting time of the current task group; and the time wheel runs, and the task group in the time wheel is executed when the time wheel runs. According to the method, task scheduling and state management can be separated, task scheduling and state management can be cooperatively controlled, the scheduling performance and the scheduling reliability are considered, in the scheduling process, unified scheduling is carried out through the time wheel according to a fixed time unit, and the scheduling efficiency can be improved while flexible and refined task scheduling is realized. It is avoided that a thread is independently created for each task group, thread resources are saved, and the scheduling efficiency and the response efficiency are improved.

The invention relates to a hybrid competition dynamic time slot allocation method and system based on BiConv-LSTM in combination with an improved ant colony algorithm. The method is suitable for a distributed communication node to construct a communication system, and comprises the following steps: a base station allocates a fixed time slot to sensor equipment for initialization, and creates a time slot allocation table to store fixed allocation; carrying out ant colony algorithm initialization by combining a BiConv-LSTM module; an optimal scheme is explored by improving an ant colony algorithm, and the method comprises the following steps: initializing global pheromone concentration, and creating a pheromone table; after the whole ant colony completes one-time search, whether a new optimal scheme exists or not is judged; judgment is carried out during re-iteration; determining a time slot allocation scheme, wherein the time slot allocation scheme comprises updating a time slot allocation table by using the optimal path scheme; judging whether a sensor occupies a competitive channel for a long time; and allocating a time slot to the sensor equipment according to the allocation scheme and sending a message. Factors such as flow, time delay and interference are fully considered during path selection, and meanwhile, the convergence speed is effectively improved.

The invention belongs to the cross technical field of biomedical engineering and signal processing, and discloses a fixed-length sleep staging sequence global correction method based on dynamic programming, which comprises the following steps of: defining an original sleep staging sequence which is divided by taking 30 seconds as a fixed time window and comprises a plurality of continuous fixed time windows, the target generates a corrected sequence, the number of fixed time windows of the corrected sequence is kept consistent with that of the original sequence, only the sleep state value corresponding to each fixed time window is corrected, and the fixed time windows are not added or deleted; a sleep state coding rule is set, and the waking state, the first light sleep stage, the second light sleep stage, the deep sleep stage and the rapid eye movement sleep stage correspond to unique digital codes respectively. Through a global cost accumulation mechanism, subsequent illegal transfer caused by local correction is avoided in advance, iteration is not needed, and the correction efficiency is remarkably improved.

The application discloses a kind of based on flight flow control restriction information autonomous release sequencing method and system, method includes: flow control restriction information is structured as including time, waypoint and digitalization constraint of traffic capacity and storage;According to the constraint screening affected flight, and it is divided into A class flight with fixed calculation takeoff time and B class flight without fixed time;With A class flight time as reference, under multiple constraints such as meeting calculation wheel block time and flow control capacity, dynamically calculate distribution suggestion takeoff time slot for B class flight;Finally, generate flight autonomous release sequencing sequence and output are integrated.This application method and system realize the change from artificial experience decision to intelligent automatic calculation in release sequencing, while guaranteeing instruction compliance, significantly improve sequencing efficiency, rationality and system response dynamic change robustness.

The application provides a quasi-state WAF isomer information arbitration method based on an outlier detection, aims to monitor state information of a plurality of isomer executors in the quasi-state WAF at a fixed time, carries out voting calculation of an abnormal index of each isomer through an information arbitration module, determines that the isomer has been attacked to enter an abnormal state when the abnormal index exceeds a certain threshold, and thus the isomer is offline cleaned. For the abnormal determination problem in the information arbitration, the application provides an accurate and reliable abnormal arbitration method, so as to improve the abnormal determination accuracy, reduce the abnormal misjudgment rate, and effectively improve the self-defense capability of the quasi-state WAF.

A DC line fault detection method and device, the method comprising: segmenting the DC line operation process continuously according to fixed time windows or events to obtain a plurality of adjacent segments, each segment containing at least one operation data, extracting the operation state characteristics after the current segment operation ends; calculating the current operation state criterion value according to the current segment and a preset number of historical segments; determining the operation state of the DC line according to the operation state criterion values and their change directions of a plurality of continuous segments in the current segment and the preset number of historical segments; if the DC line is in a suspicious operation state, performing a fault detection operation on the DC line. The triggering of the fault detection is based on the change trend of the operation state, the fault detection is triggered without relying on fixed thresholds, the influence of operation condition changes, load fluctuations and environmental interference on the detection results is effectively reduced, the stability and reliability of the detection results are improved, and the detection cost is low.

Embodiments of the present application provide a method, device, system and storage medium for reducing power consumption, the method comprising: determining whether a terminal device is in a preset state according to a fluctuation of a measured signal, a number of cell reselections, attribute information or the like within a fixed time period, and performing power saving configuration when the terminal device is in the preset state, so as to reduce power consumption of the terminal device.

The embodiment of the application provides an API request flow control method, system, device and medium, and belongs to the field of computer networks.The method comprises the following steps: receiving an API request and recording a timestamp; determining the time window to which the API request belongs according to the timestamp, and checking whether the number of requests that have passed in the time window exceeds the maximum number of requests allowed in the current time window; if not, allowing the API request to continue, updating the number of requests that have passed in the time window, obtaining the system load and the time window flow saturation, and adjusting the maximum number of requests of the subsequent time window by using a window calculation model; and if yes, rejecting the API request or adding the API request to a waiting queue.The real-time load is dynamically adjusted to dynamically adjust the flow control strategy, the impact of burst flow on the system can be effectively avoided, smooth allocation of flow is realized, the size of the time window is intelligently adjusted, the overload problem caused by the fixed time window is avoided, and the stability of the back-end service is ensured.

The application discloses a pre-defined time contact despinning control method for a flexible failure satellite and related devices, and the method comprises the following steps: acquiring the position and attitude of a service spacecraft and a flexible failure satellite, and establishing a dynamic model of the service spacecraft and the flexible failure satellite; according to the state of the service spacecraft, combining with an interference estimation value, a pre-defined time based on adaptive compensation is designed; a dynamic model of a flexible sailboard of the flexible failure satellite is established, a Lagrange multiplier method is used to establish a rigid-flexible coupling system dynamic model of the flexible failure satellite according to the pre-defined time and the state of the flexible failure satellite, and contact despinning control is performed according to the state of the rigid-flexible coupling system of the flexible failure satellite. The application avoids a complicated parameter adjustment process, can realize the stability of the service spacecraft within a fixed time according to an actual despinning task, reduces the calculation complexity, and is easy to meet the real-time despinning task demand.

The embodiment of the invention discloses an interaction method and device for a virtual pet, and the main technical scheme comprises the steps: responding to an operation for triggering the establishment of the virtual pet, requesting the establishment of the virtual pet, enabling the virtual pet to correspond to at least one interaction task, and enabling the virtual pet to correspond to at least two users; processing the interaction task through a message session interface, wherein the message session interface comprises at least two users; and displaying the updated state of the virtual pet in response to the condition that the processes of processing the interaction task by the at least two users meet the state updating condition of the virtual pet. According to the mode, the richness of the interaction content required for updating the virtual pet state can be improved, the flexibility is higher, the user does not need to wait for a fixed time length, and then the user experience is improved.

The application discloses a scheduling method, a scheduling device, electronic equipment and a computer program product. The method is applied to an access point (AP), and comprises the following steps: obtaining statistical data reported by each associated station (STA), wherein the statistical data comprises traffic data and performance data; performing time slot allocation on fixed time slots in a target time slot according to the statistical data, wherein the length of the target time slot is a preset time length, the length of the fixed time slot is not more than the length of the target time slot, the fixed time slot comprises a plurality of first time slots, the AP and a specified number of STAs are respectively allocated at least one first time slot, and the specified number is not more than the total number of STAs associated with the AP; and performing communication scheduling based on the allocated fixed time slots. The application can reasonably schedule the communication between the AP and the STAs, and reduce message collision between different devices.

The application relates to the technical field of detection equipment, and discloses an aging detection method and a detection system of a refrigeration equipment, the refrigeration equipment comprising a compressor, the aging detection method of the refrigeration equipment comprising the following steps: determining a target temperature of the refrigeration equipment; acquiring a current temperature of the refrigeration equipment once every fixed time interval; when the current temperature is greater than or equal to a first preset temperature, starting the compressor and automatically recording the current temperature and a temperature recovery time consumption of the refrigeration equipment; when the current temperature is less than or equal to a second preset temperature, stopping the compressor and automatically recording the current temperature and a refrigeration time consumption of the refrigeration equipment; and recording the number of times of starting the compressor within a preset time. The application can automatically record the current temperature and the temperature recovery time and the refrigeration time consumption of the refrigeration equipment, and automatically judge whether the refrigeration equipment is aging according to preset conditions, so that the convenience and accuracy of the aging detection of the refrigeration equipment are improved.

This invention relates to an automatic setting method, device, equipment, and medium for temporary speed limits. The method includes: classifying temporary speed limits into disturbance-related and safety-related limits; automatically controlling disturbance-related speed limits at fixed times and locations; and retaining the original emergency response mechanism for safety-related speed limits. Furthermore, the method deeply integrates temporary speed limits with timetables, compensating for time losses caused by speed limits through dynamic timetable adjustments. Compared with existing technologies, this invention achieves automatic start-stop and precise control of disturbance-related temporary speed limits while ensuring the independence and priority of safety-related temporary speed limits, thus improving the intelligence and refinement of urban rail transit operations.

The invention provides a double-fan cooperative fault-tolerant control method suitable for a power pack, and the method comprises the steps: dividing a fan working region into a non-working state, an idling operation state, a normal working region state and an early warning working region state under a normal working condition according to the real-time state of a fan; the method comprises the following steps of: setting corresponding interval limit values according to actual operation requirements according to three working intervals, namely an idling working buffer area, a normal working buffer area and a limit working area, which are newly added under a fault working condition; and in combination with the fan fault state, the time step length T and the temperature interval value, a fixed time duty ratio strategy is adopted, and the multi-rotating-speed cycle working mode of the normal fan in different intervals under the fault working condition is constructed.