23results about How to "Resolve synchronization" patented technology

The invention discloses a multi-light-spot centroid extraction method and device based on an FPGA, a medium and a product, and relates to the field of digital image processing, and the method comprises the steps: firstly, caching image line data through a first-stage FIFO and a second-stage FIFO, forming three continuous groups of image line data streams, effectively solving the problems of data synchronization and processing rate matching, and improving the data processing efficiency; then, effective pixels of the light spots are accurately determined by means of a pixel threshold value, and different light spot areas are accurately divided by means of line continuity judgment and boundary marking, so that repeated recognition and error recognition of the light spots are avoided, and the accuracy of light spot recognition is greatly improved. And finally, according to the weighted average positions of the gray values of the effective pixels of all the light spots, the target centroid coordinates of the target light spots are calculated, the internal gray difference of the light spots is fully considered, and compared with a conventional method, the light spot energy distribution center is more accurately reflected, so that the calculation precision of the light spot centroid is remarkably improved.

The invention provides a routing terminal and generalized radio station interface definition method based on a swan gap system, and belongs to the technical field of communication interfaces. In the method, an interface between a routing terminal side and an SDR is realized, and the interface comprises a service management sub-module, a message encapsulation / de-encapsulation sub-module and a TCP / UDP sub-module. And the service management sub-module is used for managing business logic of SDR interface broadcast service, subscription publishing service and subscription canceling service. The message encapsulation / de-encapsulation sub-module finishes encapsulation and de-encapsulation of various messages according to a defined message format, the fixed length of a message header occupies 4 bytes, the message header is encapsulated in a byte data stream mode, and a Payload part is encapsulated in a Json format. And the TCP / UDP sub module is used for realizing TCP / UDP Socket transmission. According to the invention, a broadcast service and SDR port negotiation process, a subscription service process, a release service receiving process and a subscription service canceling process are realized at a routing terminal side.

The present invention discloses a multi-terminal diagnosis method, device, terminal device and storage medium. The method includes sending a lock request command to the gateway of the target vehicle, the lock request command is used to request the target ECU to be locked; receiving the lock ID replied by the gateway, and generating a diagnostic command for the target ECU based on the lock ID, sending the diagnostic command to the gateway, so that the gateway sends the diagnostic command to the target ECU; receiving the diagnostic reply data returned by the gateway, and the diagnostic reply data is generated by the target ECU after executing the diagnostic command. The target ECU is locked by sending a lock request command to the gateway through the target diagnostic device, so that the diagnostic device can diagnose the target ECU only through the lock ID replied by the gateway. In this process, devices other than the target diagnostic device cannot diagnose the target ECU at the same time, so as to prevent diagnostic conflicts between diagnostic devices of different clients, and at the same time avoid synchronization problems between multiple clients, thereby improving the efficiency of multi-client diagnosis.

The invention discloses a routing method and device for a distributed erasure code deduplication system and a readable medium, and is used for solving the problems that in the erasure code deduplication system, part of data blocks are insufficient in reliability and the system performance is reduced, and the method comprises the following steps: adjusting the sequence of deduplication and erasure code coding, it is guaranteed that each data block of the file can participate in erasure code coding, and the same reliability guarantee is provided for each data block of the file; in combination with a cuckoo hash algorithm, a local deduplication technology is used for replacing global deduplication, so that the read-write performance of the system is improved; and a decentralized structure is designed, so that the problem of cluster failure caused by failure of a single node is avoided, and the performance of the system under a high-load condition is further improved. According to the invention, the read-write performance of the system is improved while high-reliability guarantee is provided for the system, and the performance improvement is more obvious under the condition of high load.

The invention discloses an equipment switching method and device based on a lightweight message transmission protocol. The method comprises the following steps: when a switching message of a lightweight message transport protocol MQTT proxy is monitored, determining a target intelligent device which needs to perform MQTT proxy switching according to the switching message; load information of each MQTT agent in a control platform where the target intelligent device is located is obtained, and the load information is used for representing the number of intelligent devices in an intelligent home system where the target intelligent device currently managed by each MQTT agent is located; determining a target MQTT proxy switched by the target intelligent device according to the load information; and switching the target intelligent equipment from the current MQTT proxy to the target MQTT proxy. According to the method and the device, the technical problem that the synchronization and the consistency of messages are difficult to guarantee when the equipment is switched to different agents because the MQTT agent is generally deployed at a single point and depends on a single agent to carry out message transmission and processing in the related technology is solved.

The present application discloses a method and system for enhancing the availability of a distributed file system. The method comprises: an input step: writing any data into a fastDFS distributed file system through a client; a cache layer creation step: creating a cache layer between a tracking server and a storage server of the fastDFS distributed file system; a processing step: processing the data through the cache layer; an output step: after the data is processed by the cache layer and uploaded to each storage server of the fastDFS distributed file system, a successful upload mark is returned to the client. The present invention solves the problem of data loss when writing data in the fastDFS distributed file system.

The present application discloses a synchronous coding method, a transmitting end and a receiving end. In the embodiment of the present disclosure, a decoder is arranged to determine a second initialization vector according to a preset synchronization margin. The synchronization margin is used to make the second codeword synchronization value less than or equal to the first codeword synchronization value, thereby ensuring that the codeword synchronization value of the decoder at the receiving end is a one-way search for the codeword synchronization value of the transmitting end, and providing technical support for realizing fast synchronization of the decoder at the receiving end; by updating the second codeword synchronization value, it is ensured that the synchronization value of the receiving end continuously tracks and synchronizes the synchronization value of the transmitting end, effectively solving the synchronization problem of the receiving end when the codeword is lost; further, a shared random number is introduced as an initialization vector to ensure the random selection of different check matrices, and ensure that the dynamic check matrix used for each transmission task is different, thereby improving the security performance of the system.

A star sensor output time synchronization method relates to the technical field of star sensor time synchronization, solves the problem of star sensor output time synchronization, and outputs time information inside a star sensor by using a clock of the star sensor under the condition of no external pulse per second signal and time broadcast information. And if the external pulse per second signal and the time broadcast information are received, the star sensor outputs standard UTC time information, and synchronizes the internal time information to the UTC time information. And if the external pulse per second signal and the time broadcast information are lost, the star sensor is rapidly switched into internal time information and outputs the internal time information. The time information output by the star sensor can be rapidly and reliably switched between the internal time and the UTC time, and the synchronization problem of the time information output by the star sensor is effectively solved. The output time synchronization method of the star sensor has the advantages of reliable synchronization, accurate time keeping and the like, and is suitable for star sensor equipment.

The invention discloses a communication method for preventing a replay attack. The method comprises the following steps: a first device sends a request frame for establishing communication to a second device; when the first equipment receives a response frame sent by the second equipment in the time window, the first equipment confirms whether the response frame is valid or not according to the random value; if the response frame is valid, the first device sends a data frame to the second device; the first device receives an acknowledgement frame sent by the second device; and the first device continues to send the data frame to the second device until data sending is completed, and the first device sends an end frame to the second device. According to the method, the replay attack can be prevented, and the security in the communication process is improved.

This invention relates to the field of protocol conversion and transmission technology, specifically an FPGA-based AFDX to Aurora protocol transmission and conversion system. The system includes: an AXI-AFDX module responsible for parsing and encapsulating standard AFDX frame signals, and separating AFDX control signals from data signals; an AFDX over Aurora module that achieves cross-clock domain synchronization by storing control and data signals separately in dual FIFOs, extracting frame groups in an orderly manner based on virtual link static priority scheduling and same-priority polling mechanisms, and encapsulating them into IP frame format with extended fields to ensure that critical AFDX control information is not lost during Aurora transmission; and an Aurora protocol module that performs bidirectional conversion between IP frame signals and Aurora protocol high-speed serial signals, adapting to external GT high-speed interfaces. This invention achieves reliable transmission to high-speed serial links.

The invention discloses a method and device for a display screen to adapt to display of a lower computer and a storage medium. The method comprises the steps that the color display screen encodes all menu pages according to a micro control unit MCU selected by the color display screen and a code frame; the color display screen establishes a communication protocol and actively acquires an instruction from a lower computer under the color display screen; the lower computer uploads menu changes and parameters to the color display screen through a communication protocol; the color display screen displays corresponding pages and parameters according to the received instruction of the lower computer; the LCD color screen is adopted to replace a traditional black and white screen, the display effect of the printer is greatly improved, the color screen can dynamically respond to instructions of the lower computer, rich graphs and colors are displayed, the visual experience of a user is optimized, the synchronization problem is solved through the preset communication protocol and active instruction obtaining, the consistency of the display content and the state of the lower computer is ensured, and the user experience is improved. The color screen also has the function of error instruction identification, avoids system faults, supports remote software upgrading, and improves the continuity and reliability of printer operation.

The invention discloses an intra-network aggregation method and system for reducing federated learning communication burden. The method comprises the following steps of: splitting aggregation in a net into a plurality of time slots by using a fish mouth shunting mechanism; then, a treasure bottle mechanism is adopted to align sparse indexes so as to realize effective aggregation; in a dynamic network, packet loss is effectively checked and effectively recovered by using a flying sand mechanism. According to the scheme provided by the invention, the problems of sparse model updating, data packet loss and synchronization faced by intra-network aggregation and federal learning can be effectively solved.

The invention relates to the technical field of hardware welding, in particular to a plasma arc welding machine for hardware products and a method thereof.The plasma arc welding machine comprises a supporting base, a machining table is fixedly connected to the top of the supporting base, a supporting block is fixedly connected to the back end of the machining table, and a lifting machine is fixedly connected to the top of the supporting block; a plasma arc welding device is fixedly connected to the top of the elevator, and a welding nozzle is formed in the front end of the bottom of the plasma arc welding device; when the supporting mechanism is started, the fixing mechanism is driven to fix, the problem that the fixing mechanism is synchronous through a plurality of driving devices is solved, meanwhile, the overturning mechanism can be driven to overturn, the situation that the position of a welding point cannot be adjusted in time during welding work is avoided, and the cooling mechanism can be driven to work when the air suction mechanism is started. And the situation that cracks and damage are prone to occurring at the continuous high temperature of the welding opening is avoided, the cooling mechanism can be controlled through the liquid control assembly, and the liquid leakage situation occurring when the device does not work is avoided.

The present application belongs to the technical field of artificial intelligence chip design, and particularly relates to a LogSoftmax function hardware implementation system and method thereof. The system comprises a control module, a data preprocessing module connected with the control module, a configuration data generation module connected with the control module, a LUT storage module connected with the control module and the configuration data generation module, and an operation module connected with the control module, the data preprocessing module and the LUT storage module. The data preprocessing module comprises a maximum value calculation circuit, a data parallel processing circuit and a precision conversion circuit. The configuration data generation module comprises a control flow analysis module, a data flow analysis module, a control information generation module, an exponential FIFO and a logarithmic FIFO. The LUT storage module is used for storing LUT tables of exponential values and logarithmic values. The method can significantly reduce storage resource consumption and improve computing efficiency.

The invention belongs to the technical field of network security, and discloses an intelligent label construction and rapid search method for distributed data privacy protection. According to the method, the correlation interpolation function is constructed, the randomization of the main-sub label mapping is ensured, the scale of the number of function items is controlled, and the main-sub label mapping is segmented and stored in the two servers in an addition secret sharing form, so that the safety of label mapping storage is improved, and the balance between the safety and efficient storage is achieved. Besides, the search algorithm converts the query problem of the sub-tags into a function value solving problem, the tedious process of data comparison in the query process is avoided, the higher query speed can be obtained, and the requirement for large-scale data split storage can be met.

The present application provides a method and device for developing a mobile application platform fusion base, which relates to the field of information technology, including: based on the analysis results of data dependencies between different modules, judging whether there are data dependency conflicts and version conflicts, and if so, using a pre-set mobile application data conflict solution and version compatibility analysis method to merge data for dependency conflicts and version conflicts; based on the results of data merging, updating the version number of local data, forming association information between the merged data and the local data version, and using a pre-defined timestamp record format standard to synchronously record the modification time of each piece of data. Solve the data synchronization problem of mobile applications in offline environments, ensure data consistency, reduce data loss and user intervention, and improve synchronization efficiency and user experience.

The invention discloses a data acquisition test platform for a battery management system, and the platform comprises an upper computer which is used for reading the voltage and temperature measurement results of a single battery in real time; the communication protocol conversion device is used for receiving and forwarding the voltage and temperature measurement results of the single batteries to the upper computer; the battery management system is used for acquiring voltage and temperature measurement results of the single batteries and sending the voltage and temperature measurement results to the communication protocol switching device; the environment simulation device is used for setting environment simulation of the battery management system to be normal experiment environment requirements specified in a standard test method; the battery simulation device is used for inputting the voltage, read by the upper computer, of the single battery to the battery management system and measuring the voltage precision of the single battery; and the power supply is used for inputting different currents and voltages to the battery management system and measuring the total voltage precision and the current precision of the battery management system. According to the invention, the test cost is reduced, and the test efficiency is improved.

The utility model provides a kind of shoveling tooth machine, it is related to shoveling tooth machine technical field.It includes base, portal frame, shoveling tooth unit, first single motor, first single screw and first sliding unit, portal frame is connected with base, first single motor and first single screw are centrally connected on portal frame, first single motor is driven connection with first single screw, shoveling tooth unit is transmission connection with first single screw and is movably connected with portal frame by first sliding unit.By using first single motor and first single screw cooperation, the synchronization problem of double motor and double screw in control process can be solved, the shoveling precision is greatly improved, and because single motor and single screw design are used, the shoveling tooth machine is more miniature, smaller in size, the start-stop position of shoveling tooth unit processing can be accurately controlled, the quality and performance of product are improved, the requirement of high standard is satisfied, and production efficiency is improved.

This invention relates to the field of data processing technology and discloses a real-time data anomaly detection method integrating time series analysis. The method includes: acquiring a high-frequency target time series signal and a low-frequency operating condition feature vector; generating a synchronization operating condition vector using mask dimensionality reduction and zero-order preservation mechanisms; generating a steady-state and transient composite hash key through hash mapping and comparison; reconstructing the high-frequency signal and constructing a high-dimensional state trajectory matrix; determining the routing query key based on the hash key; extracting benchmark features from the dictionary when a match is found; performing regularization on the sample covariance matrix using a noise floor parameter; and projecting the sample onto the tangent space to calculate anomaly metrics for anomaly determination; and calculating incremental benchmark features and updating the dictionary when a match is not found and the physical continuity and manifold stability conditions are met. This invention solves the multi-rate data synchronization problem, reduces hardware noise interference and calculation errors in direct ranging in non-Euclidean geometric space, and enables online learning of new operating conditions without requiring system downtime for retraining.

The invention provides a synchronous control method of a beauty instrument. According to the synchronous control method, a master device and a slave device are connected by adopting a wireless communication technology; pairing the master device with the slave device based on the address of the device and the device ID; if the devices are successfully paired, a unique communication address and frequency are randomly allocated to each pair of devices; the master device encrypts the transmitted data by using the data frame and then transmits the data to the slave device to obtain the corresponding data, and the slave device adjusts the current operation state according to the received data, so that the synchronous operation of the master device and the slave device is realized.

The invention provides a multi-channel synchronous separation device for a falling tower type zero-gravity test and a control method, and the device comprises an AC commercial power module, a circuit breaker module, a conversion module, a switch module, a first separation interface module, a relay module, a power module, a second separation interface module, and a high-temperature-resistant cut-off module. The first separation interface module comprises a first connector and a second connector, and the second separation interface module comprises a third connector and a fourth connector. The multi-channel synchronous separation device for the falling tower type zero-gravity test is obtained through a specific connection mode, and the test effect is better when the multi-channel synchronous separation device for the falling tower type zero-gravity test is used for conducting the test.

The invention provides a pilot channel three-dimensional space velocity quantitative calculation method and system, and the method comprises the steps: building a positive polarity pilot discharge optical form dynamic and static image observation system through a high-speed camera and two single lens reflex cameras, and carrying out the optical shooting of a long-gap pilot discharge channel; and the static development process and the dynamic development process of the pilot channel are accurately obtained. For static images of a discharge channel obtained by two single lens reflex cameras, accurate inversion of a long-gap pilot discharge channel in a three-dimensional space can be realized by using a three-dimensional image inversion algorithm, and a dynamic development process of a pilot in the three-dimensional space is obtained by combining a pilot two-dimensional dynamic development process captured by a high-speed camera. And the pilot three-dimensional space velocity is accurately calculated.

The present application relates to the technical field of press machine, in particular to a single hydraulic pump strong synchronous stress gradient loading press machine, which comprises a plunger pump and a matched motor fixedly connected with the plunger pump. The present application provides a single power source by the plunger pump and the matched motor, and realizes multi-stage conversion of hydraulic pressure by combining four different multiple transformers in the pressure conversion mechanism, so as to generate four groups of hydraulic oil output with different pressures for building a stress gradient environment, which realizes high integration and optimization, avoids the use of multiple independent hydraulic pumps and their control systems in the traditional multi-cylinder loading system, greatly simplifies the complexity of the overall equipment, and reduces the manufacturing and maintenance costs. At the same time, since a single power source is adopted for driving, the response consistency of the hydraulic system is stronger, which avoids the synchronization problem caused by the response delay or load coupling of each cylinder hydraulic system in the multi-cylinder loading process, thereby improving the stability and control precision of the loading process.