52 results about "Fixed time" patented technology

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 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.

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 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.

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.

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 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.

The invention discloses a satellite navigation interference detection method and device and a medium, and the detection method comprises the steps: carrying out the statistics of the maximum AGC control voltage value at each FTF moment in each second through a traversal method, comparing the maximum AGC control voltage value with a preset interference alarm threshold, and if the comparison result is greater than or equal to the preset threshold, immediately outputting an alarm when interference exists, and if the comparison result is smaller than the preset threshold, determining that no interference exists and no alarm is given. Aiming at the defect that a traditional satellite navigation receiver cannot detect an interference signal during intermittent interference when detecting the interference signal at a fixed time slot per second, the invention provides an AGC control voltage value selection maximum value based on traversing each FTF moment per second to judge the interference signal, and the method does not need to change hardware, is basically not increased in cost, volume and power consumption, and is suitable for large-scale popularization and application. The algorithm is simple to realize and high in reliability, and the success rate of interference detection is greatly improved.

The invention discloses a defrosting control method and device, a medium and an air conditioner, and the method comprises the steps: obtaining a target evaluation parameter used for evaluating a defrosting load, and switching a defrosting exit condition from an initial first condition to a second condition easier to trigger when the parameter indicates that the parameter is in a load risk state; according to the scheme, the quit time can be dynamically adjusted according to the actual defrosting load, and it is ensured that the system can respond quickly and quit the defrosting mode immediately after the frost layer is actually melted; the problem that in the prior art, the defrosting exit time is delayed due to fixed duration or preset pipe temperature threshold value control is effectively solved, the situation that the system is in an invalid defrosting state for a long time is avoided, and the operation efficiency of the air conditioner system is remarkably improved.

Various techniques are provided to configure serializer / deserializer (SerDes) lanes in one or more SerDes quads into configurable groups using a bonded link. The configuration registers may configure the SerDes lanes into the configurable groups. A lane bonding control module in each SerDes quad may link the signals, including control signals, that travel within each configurable group. To synchronize the control signals, the lane bonding control module may include one or more flops that introduce a fixed time delay for control signals that travel between SerDes quads, and pipe stage match modules that introduce a variable time delay to match the fixed time delay caused by the flops. Once synchronized, the control signals arrive at different SerDes lanes in the configurable group at the same clock cycle.

The application discloses a test method, an electronic device and a storage medium, wherein the test method comprises the following steps: issuing a preset number of shooting instructions to a to-be-tested camera of the electronic device at intervals of a fixed time length, and acquiring a number of photos shot by the to-be-tested camera; in response to the number of photos shot by the to-be-tested camera being less than the preset number, extending the fixed time length, and issuing the preset number of shooting instructions to the to-be-tested camera again; and in response to the number of photos shot by the to-be-tested camera being equal to the preset number, determining the corresponding fixed time length as a response time of the to-be-tested camera. Through the above method, the application can improve the accuracy of the response time of the to-be-tested camera of the electronic device.

The invention discloses an autonomous release sorting method and system based on flight flow control restriction information. The method comprises the following steps: structuring the flow control restriction information into digital constraints including time, waypoints and traffic capacity, and storing the digital constraints; according to the constraint, screening the influenced flights, and dividing the influenced flights into A-class flights with fixed calculated take-off time and B-class flights without fixed time; the time of the class-A flights is taken as a benchmark, and under the condition that multiple constraints such as wheel block removal time and flow control capacity are met, suggested take-off time slots are dynamically calculated and distributed for the class-B flights; and finally, integrating and generating a flight autonomous release sorting sequence and outputting the flight autonomous release sorting sequence. According to the method and the system provided by the invention, the change of release sorting from artificial experience decision making to intelligent automatic calculation is realized, and the sorting efficiency, the rationality and the robustness of the system for coping with dynamic change are remarkably improved while the instruction compliance is guaranteed.

The invention discloses a time-based physical sub-table acquisition method, which relates to the technical field of database management, and comprises the following steps of: S1, acquiring a system starting instruction and a database reference table structure, automatically checking and creating physical sub-tables of a current month and a next month, and setting monthly fixed time to trigger timed automatic checking and creating logic tasks at the same time, the physical sub-table of the next month is ensured to be created in advance; s2, receiving a data writing request, and extracting a time attribute of to-be-written data; according to the calculation method based on the time physical sub-table provided by the invention, through a data management strategy, the efficiency and the flexibility of the database in processing large-scale time sequence data are improved, full-automatic management is realized, the operation and maintenance cost is effectively reduced, errors and omissions possibly caused by manual intervention are avoided, and the operation efficiency is improved. And a dynamic table name routing mechanism ensures the accuracy of data writing, so that service codes do not need to perceive details of sub-tables, and the usability is enhanced.

The application discloses a kind of urban rail transit OD passenger flow estimation method of arbitrary time period based on station passenger flow fitting, comprising the following steps: basic data acquisition;Calculate the cumulative in-and-out station passenger flow of each station;Fitting cumulative in-and-out station passenger flow function;Based on OD inter-station time consumption passenger flow time period projection;Based on the correlation of time period projection and station OD passenger flow estimation;Based on the passenger flow accuracy evaluation and correction of Frator model;Output each station arbitrary time period OD passenger flow result.The application solves the current urban rail transit OD passenger flow estimation is subject to fixed time granularity, discretization processing, data highly dependent, etc. Limit, difficult to meet the differentiated station, arbitrary time granularity and high-fidelity OD passenger flow real demand, and in low data dependence, continuous fitting and space-time alignment Limited in technology, the problem of insufficient practicality of estimation result, can break through the fixed time limit, without a large number of historical data support, realize continuous passenger flow fitting and space-time accurate matching OD passenger flow estimation.

The application discloses a control method for preventing deviation of a rack in a finishing rolling process, which comprises the following steps: locking a rolling force deviation in a period after a head is rolled out at a fixed time as a stable rolling force deviation value, determining a real-time value of the rolling force deviation in a subsequent rolling process, calculating a difference value between the real-time value of the rolling force deviation and the stable rolling force deviation value until a flying shear cuts a tail, and automatically calculating a single-side roll gap leveling of a rolling mill according to a change of the difference value, so as to realize automatic leveling and deviation prevention in the finishing rolling process. The control method reduces manual intervention, reduces labor operation load, and improves stability and quality of the finishing rolling.

The application relates to a road surface detection sampling method and system for highway construction technology, and relates to the field of engineering detection technology.The method comprises the following steps: establishing a detection interval according to a fixed time length on a time axis; acquiring the horizontal bubble position of a level meter at each time point in the detection interval; counting the horizontal bubble positions to determine the number of same positions, determining the number of the same positions with the maximum value according to a sorting rule, defining the horizontal bubble position corresponding to the number of the same positions as a standard bubble position, and defining the horizontal bubble position of the current time point as a detection bubble position; calculating the standard bubble position and the detection bubble position to determine the device inclination direction and the device inclination angle; determining the required adjustment direction according to the device inclination direction, controlling the drill bit to rotate the device inclination angle along the required adjustment direction, and controlling the drill bit operation after the rotation is completed.The application has the effect of improving the accuracy of soil thickness detection.

The present application relates to the technical field of fault diagnosis, and more particularly to an air conditioning unit fault monitoring method and system based on multi-modal data fusion. The method comprises: acquiring state values of the air conditioning unit in multiple dimensions in real time; determining the abnormality degree of each dimension at the current time; determining the time step optimization coefficient of each dimension at the current time; determining the adaptive time step of each dimension at the current time; using an anisotropic diffusion filtering algorithm for denoising and obtaining the abnormal score of the air conditioning unit at the current time to realize fault monitoring of the air conditioning unit. The present application dynamically adjusts the time step according to the sorting position of the target dimension state value within the time period of the current time, the median and the coefficient of variation in the ranking, and other indicators, so as to more flexibly and accurately capture the change speed of the state value in different time periods, avoid the defect that the fixed time step in the traditional algorithm cannot adapt to the fast and slow state changes, and make the subsequent fault monitoring more accurate.

The invention discloses a user behavior characteristic-based short play content dynamic splicing and accurate delivery method, which relates to the technical field of dynamic delivery, and comprises the following steps of: screening candidate plot segments conforming to a splicing skeleton from a plot segment library according to a session strategy decision packet, sequentially splicing the candidate plot segments in a splicing contract library according to an allowable connection relationship, a connection cost level and hard constraints, inserting bridging segments when needed, generating a piece of materials and a delivery identifier, determining a budget rhythm control strategy based on a budget allocation rule of a delivery platform, and sending the budget rhythm control strategy to the delivery platform. According to the piece materials and the delivery identification, the delivery multiplying power is updated in a fixed time slice according to a budget rhythm control strategy, and a time slice delivery instruction is generated; according to the method, the delivery multiplying power is dynamically adjusted, the delivery strength can be adjusted in real time according to the budget consumption rhythm and the content commercial value at the same time, and therefore the mode that in an existing method, resource allocation is conducted only according to the fixed budget proportion or the unified delivery multiplying power is changed.

The invention provides an error detection device and a Hall sensor, and the device comprises an obtaining module which receives a first to-be-detected signal and a second to-be-detected signal, is used for obtaining the jump state of the first to-be-detected signal and the jump state of the second to-be-detected signal at regular time, and records the jump state as a first value if only the first to-be-detected signal jumps, if only the second to-be-detected signal jumps, recording as a second value, otherwise, recording as a default value to obtain first data; and the detection module is coupled to the acquisition module and is used for detecting whether the data volumes of the first value and the second value in the first data are matched or not, and if the data volumes of the first value and the second value are not matched, judging that the phase difference between the first signal to be detected and the second signal to be detected does not meet the requirement. According to the scheme, the detection efficiency and the accuracy and reliability of a detection result can be improved.

This disclosure relates to a method and related apparatus for determining time intervals. The method includes determining a first time interval for the current moment based on a timestamp recorded during communication with a sensor, and determining a second time interval for the current moment based on time intervals from historical moments. The method further includes determining the time interval for the current moment based on the first time interval, the second time interval, and noise correlation coefficients between the first time interval and the noise of the second time interval. According to embodiments of this disclosure, by adjusting the noise correlation coefficients of the measurement time interval and the estimated time interval, the weights of the measurement time interval and the estimated time interval relative to the final time interval can be changed, avoiding a fixed time interval and thereby improving the accuracy of the final time interval.

The present invention comprises a predetermined beacon 1 to be received and a mobile terminal 2 that executes prescribed processing upon receiving beacon information transmitted from the beacon 1 to be received. As long as terminal information, which is information for identifying the mobile terminal 2, does not change, the mobile terminal 2 suspends execution of the prescribed processing once a fixed time elapses after receiving the beacon information, even if the mobile terminal 2 receives beacon information of which the content is ascertained to be the same during the elapsed time. Furthermore, the mobile terminal 2 successively switches a plurality of instances of the terminal information, which are ascertained to be different from each other in content, on a time interval that is less than or equal to the fixed time, or on a time interval obtained by adding a prescribed short time to the fixed time. This makes it possible to provide a processing execution system capable of improving the execution reliability and convenience of prescribed processing in cases where said prescribed processing is executed by a mobile terminal using a beacon.

The invention discloses a fixed-time cascade active-disturbance-rejection control method for a permanent magnet synchronous motor, and belongs to the technical field of permanent magnet synchronous motor control. The method comprises the following steps: firstly, establishing a speed equation containing a lumped disturbance term for the surface-mounted permanent magnet synchronous motor, and constructing an expansion state model of the surface-mounted permanent magnet synchronous motor; secondly, designing a cascade system structure composed of a front-stage fixed time extended state observer and a rear-stage finite time extended state observer, and realizing disturbance hierarchical estimation and fixed time convergence; thirdly, an error feedback control law is designed according to an output result of the extended state observer, and rapid feed-forward compensation of disturbance and high-precision control of speed are achieved; and finally, carrying out convergence analysis and experimental verification on the cascaded extended state observer of the control system, and verifying the effectiveness of realizing disturbance estimation and error convergence within a fixed time. The method is excellent in disturbance suppression precision and dynamic response speed, and the stability and control performance of the permanent magnet synchronous motor system are remarkably improved.

The application discloses a low-cost underwater acoustic communication medium access control method and device based on reinforcement learning, and the method comprises the following steps: acquiring a time slot length, dividing a transmission time into fixed time slots according to the time slot length; transmitting data packets according to the fixed time slots to obtain a transmission result of the data packets; and updating a dynamic reward value of an upper bound confidence algorithm based on the upper bound confidence algorithm according to the transmission result. The application can improve the transmission rate of underwater communication data and can be widely applied to the technical field of underwater acoustic communication.

The invention provides a data processing method and system, electronic equipment and a storage medium, and relates to the field of data processing.The method comprises the steps that before a communication link starts to work, a plurality of detection data packets with progressive increase of serial numbers are transmitted, the receiving quantity of the detection data packets is counted through the serial numbers, and the packet loss rate of the communication link is calculated in advance; the packet loss rate is initial; based on the initial packet loss rate and a preset timeout retransmission formula, obtaining timeout retransmission time RTO of the communication link; and continuously updating the packet loss rate of the communication link in the working process based on a time window with a fixed time length and a fixed sliding step length, and substituting the updated packet loss rate into a timeout retransmission formula for dynamically adjusting the timeout retransmission time. Therefore, the dynamic adjustment of the timeout retransmission time is realized, the time in the subsequent convergence process can be reduced, and the data transmission efficiency is improved.

A watchdog circuit for monitoring a plurality of processes. The watchdog circuit is configured to provide a periodic signal with an adjustable fixed time interval to a control circuit. The control circuit is configured to receive the periodic signal from the timer and use periodic signal to monitor the plurality of processes. Each of the plurality of processes has a planned process duration. The fixed time interval is set to be longer than the longest planned process duration of the plurality of planned process durations.