30results about How to "Avoid sync failures" patented technology

A current sharing control method for parallel intelligent rectifier bridges is disclosed and applied to current sharing and rectification operation for a plurality of parallel three-phase silicon controlled intelligent rectifier bridges. Each intelligent rectifier bridge sends sampling data of a previous power frequency period to an adjusting device after receiving a zero-crossing synchronization signal, the adjusting device sets synchronization period timing after receiving first sampling data, and the synchronization period is limited to be less than one half of a power frequency period; in a set synchronization period, as for all the intelligent rectifier bridges, the adjusting device receives sampling data before replying control data for next power frequency periods corresponding to the intelligent rectifier bridges in a one-by-one manner, and each intelligent rectifier bridge sends sampling data only once in one power frequency period. Via adoption of the current sharing control method output currents of the parallel intelligent rectifier bridges can be equalized in an accurate manner, and a possible problem that various output pulses are not synchronous in parallel intelligent rectifier bridges can be effectively prevented. System operational reliability can be substantially raised.

The invention provides a data synchronizing method and device of a bank mainframe and an individual computer, and relates to the technical field of bank system data processing. The method includes thesteps of dividing trade data into real-time trade data and non-real-time trade data according to the business types of the trade data of all bank accounts in the bank mainframe, combining the real-time trade data and the non-real-time trade data of the same bank account according to the business type of the trade data to form corresponding real-time synchronous trade data and non-real-time synchronous trade data of the same bank account, synchronizing the real-time synchronous trade data to the individual computer within a preset first time duration through a preset synchronizing tool, and synchronizing the non-real-time synchronous trade data to the individual computer within a preset second time duration through the preset synchronizing tool, wherein the second time duration is later than the first time duration.

A generation method of a circular training sequence containing two training symbols includes: randomly growing a first information clock with the length of N, copying the last L data before the first information block as the circulation prefix of the first training symbol, forming the first information block to the information block of the second training symbol in the same length with the first information block in terms of the circulation mode, namely, the second information block, in which, the circulation mode is to shift the last d data of the first block to the start position and copy the last L data of the second block before the second block as the training prefix of the second training symbol, so that the two symbols form a circulation training sequence.

The present invention relates to a kind of time synchronization method and system for multi-viewpoint video collection, and the method of the present invention comprises the following steps: (1) use the network time protocol to synchronize the system time of all devices; Start a video acquisition program respectively; (3) the video acquisition program monitors the control command from the synchronization server; (4) the synchronization server detects the maximum round-trip time of the local area network; (5) the synchronization server adds the current system time and the maximum round-trip time of the local area network as an estimated The acquisition time is sent to each video acquisition program; (6) The video acquisition program cyclically compares the current system time with the expected acquisition time, and starts video data acquisition if it exceeds. The invention effectively avoids the synchronization failure caused by too short waiting time delay, and at the same time, can avoid the unprincipled long waiting of the video acquisition machine, and the time precision can reach millisecond level. The method of the invention can be widely used in various multi-camera-based multi-viewpoint video data collection and transmission systems.

The present application discloses a data synchronization method, device, computer equipment and storage medium. The data synchronization method includes: pulling a database log of an index database in real time through a log pulling component, and analyzing the index information of the data to be synchronized from the database log ; Obtain the node status information of each server node in the multiple server nodes, and determine a number of accommodating data types of each server node and the accommodating data amount of each accommodating data type in the several accommodating data types according to the node state information; obtain the corresponding index information According to the index information, file attribute information, a number of accommodated data types and accommodated data amount, the target file data is extracted from the file storage server; the target file data is synchronized to the file index server. The present application can improve the real-time performance of data synchronization, and can avoid the problem of important data synchronization failure caused by node status.

The invention discloses an agent-based information resource directory synchronization method, comprising: deploying an information resource directory node in each organization domain, and deploying a directory synchronization agent node on a gateway server of each organization domain; when the first organization domain When data changes occur in the information resource directory node, the operation message is sent to the directory synchronization agent node, and the directory synchronization agent node sends the synchronization message to the directory synchronization agent node of the second organization domain; when the directory synchronization agent node of the second organization domain receives When synchronizing messages, judge whether to synchronize with the first organization domain according to the synchronization message; if not, the directory synchronization proxy node of the second organization domain pulls the changed information resource metadata to update the information resource directory node. By adopting the above-mentioned method, it is possible to realize the direct synchronization of the information resource directory mesh, break through the bottleneck limitations of the synchronization server performance and load in the central synchronization method, and avoid the synchronization failure problem caused by the destruction of the synchronization server.

The embodiment of the present invention provides a method and device for synchronizing video network resources to Internet terminals, which relate to the technical field of video networking. At the decompression transfer terminal, receive the Internet-of-Vision resource synchronization request sent by the Internet terminal based on the Internet protocol; the synchronization request includes: the identification of the co-translation server; the co-translation server stores a video-network resource compression package; The target co-conversion server corresponding to the co-translation server identifier forwards the Internet of Vision resource synchronization request; receives the resource compression package of each Internet of Vision corresponding to the Internet of Vision resource synchronization request returned by the target co-translation server; After receiving the resource compression package, decompress each video network resource compression package and synchronize it to the database. Synchronization failures due to long reception times can be avoided.

The invention discloses a system configuration data management method based on block chain and smart contract, which relates to the field of block chain system. The method steps of the present invention are: (1) Writing configuration data into the account book: writing the configuration data into blocks of the blockchain network to form a decentralized configuration data account book. (2) Network nodes synchronize ledger data: all information nodes obtain and save a copy of the ledger from nearby nodes through the P2P protocol. (3) Network nodes read configuration data in the ledger: each information node directly reads a copy of the ledger to obtain configuration data. (4) Update configuration data in batches through smart contracts. The present invention can effectively avoid information node configuration data errors caused by network communication and malicious tampering, and can also greatly simplify the operation of updating configuration data for a large number of information nodes. The method is simple and the entire system process is safe and stable. , Accurate characteristics.

The present application provides a synchronization source determination method, device, terminal and storage medium based on D2D communication technology. The method includes: determining whether there is a synchronization source in the coverage area of ​​the cellular network based on multiple broadcast signals obtained by the current user terminal; if there is no synchronization source in the coverage area of ​​the cellular network, determining the coverage area of ​​the cellular network based on multiple broadcast signals Multiple candidate user terminals corresponding to the current user terminal and synchronization parameters corresponding to multiple candidate user terminals, the synchronization parameters corresponding to any candidate user terminal include at least one item of mobile state information, battery information, and the number of surrounding user terminals ; Perform sorting processing on multiple candidate user terminals; determine at least one synchronization source among the multiple candidate user terminals based on the sorting processing results. The embodiment of the present application solves the problem of poor synchronization processing efficiency existing in the prior art through synchronization parameters.

The invention relates to the field of wireless communication, and discloses a synchronization method and device between base stations. The method includes the steps that when the local base station reaches the search time of synchronization source base stations, whether the synchronization source base station meeting the synchronization condition exists in the adjacent base stations or not is judged; if the synchronization source base station meeting the synchronization condition exists, the synchronization source base station meeting the synchronization condition is switched into the target synchronization source base station of the next base station synchronization; when the local base station reaches the synchronization time, the local base station and the target synchronization source base station are synchronized. Through the synchronization method, synchronization failure caused by changes of a synchronization source self or influences of environmental factors can be effectively prevented, and reliability of base station synchronization is improved.

The embodiment of the invention discloses a GPS signal-based base station signal synchronization method, device, base station equipment and storage medium. The method includes: receiving a GPS signal and confirming the missing time of the GPS signal; calculating a frame offset adjustment value according to the GPS signal; calculating an adjustment average value and an average adjustment interval according to the frame offset adjustment value; judging whether the missing time is greater than a preset time threshold; If the time is less than or equal to the preset time threshold, the frame offset adjustment is performed according to the adjusted average value, the average adjustment interval, and the missing time; if the missing time is greater than the preset time threshold, the frame offset adjustment value is cyclically used for adjustment. The base station signal synchronization method based on the GPS signal provided by the present invention can perform GPS synchronization stably for a long time under a weak GPS signal, and has high synchronization precision.

The invention discloses a rotating shaft mechanism of a flexible screen. The mechanism is used for being arranged at an overturning and folding part of the flexible screen, can be bent along with theoverturning and folding of the flexible screen, and comprises a plurality of rotating shaft chain belts which are arranged side by side at intervals, and two connecting shafts for fixedly connecting the rotating shaft chain belts, the two ends of the first rotating shaft chain belt and the two ends of the last rotating shaft chain belt are fixed to the two ends of the head positions of the two connecting shafts respectively to form a rectangle. The four rotating shaft gear pieces are arranged on the rotating shaft chain belt and engaged together through the gears, so that when the rotating shaft mechanism is bent, the four rotating shaft gear pieces are matched with one another to compensate for the length variable of the bent rotating shaft; the phenomenon that the rotating shaft and theflexible screen cannot be synchronized due to the fact that the length of the rotating shaft is shortened after the rotating shaft is bent is avoided, in the bending process of the rotating shaft, thefour rotating shaft gear pieces are matched to thin the rotating shaft, and the phenomenon that the rotating shaft mechanism is damaged and the flexible screen fails due to mutual extrusion of gearsis avoided.

The embodiment of the invention discloses a synchronization method and device. A synchronization method includes: the first terminal obtains at least two ping-pong delays between the first terminal and the second terminal; the first terminal judges whether the plurality of ping-pong delays meet channel stability conditions; if so, The first terminal estimates a channel transmission delay between the first terminal and the second terminal; the first terminal sends a synchronization control signal to the second terminal, and the synchronization control signal is used for the second terminal The two terminals perform a synchronization operation after receiving the synchronization control signal; and the first terminal performs a synchronization operation with a delay equal to the channel transmission time delay after sending the synchronization control signal. The embodiment of the present invention realizes the synchronization control between terminals by estimating the channel transmission time delay between terminals, and according to the channel transmission time delay.

The invention discloses a synchronized method of a network disk system, terminal equipment and the network disk system. The synchronized method comprises the steps as follows: detecting a network disk directory entry of a client of the network disk system and / or a plurality of change operations of the network disk directory entry of a server of the network disk system; converting the plurality of change operations into a plurality of synchronization tasks, wherein the plurality of synchronization tasks are used for realizing synchronization between the disk directory entry of the client and the disk directory entry of the server; determining dependency relationship among the plurality of synchronization tasks; distributing the synchronization tasks which do not have the dependency relationship in the plurality of synchronization tasks to different threads to carry out parallel execution. According to the technical solution of the invention, the synchronized method could improve synchronizing efficiency of the network disk system and avoid synchronization failures brought by logical errors.

The invention discloses a processing method and a system of synchronization failure in dynamic content distributing (DCD) service. A series of error status codes defined in advance are stored in a terminal. When the synchronization between the terminal and a DCD server fails, the terminal reports a corresponding error status code to the DCD server according to a failure reason; then the DCD server carries out processing according to the failure reason expressed by the error status code, and when the failure reason is an temporary error, the DCD server informs the terminal to immediately attempt synchronization so as to avoid that a synchronous process of a normal retry mechanism delays the time of data synchronization, and thereby, user experience can be influenced. Correspondingly, when the failure reason is a fatal error, the DCD server sends a fatal error message to inform the terminal to let a user terminate synchronization so as to avoid that the synchronization triggered by the retry mechanism continuously fails, and thereby, an information interactive condition between the server and a client side can be improved. Meanwhile, the invention also discloses a processing system of synchronization failure in DCD service.

The invention discloses a variable-frequency main power source ship power station, and the power station comprises prime motors ME, engines G, rectifiers, a DC busbar DC, an AC busbar AC, an inverter, and a frequency converter. There are a plurality of groups of motors ME, engines G and rectifiers. The motors ME are connected with the engines G, and drive the engines G to rotate. The engines G output electric energy to the rectifiers, and the rectifiers are connected with the DC busbar DC, and transmit the direct current to the DC busbar DC. The inverter is connected between the DC busbar DC and the AC busbar AC, enables the direct current of the DC busbar DC to be converted into the alternating current with the rated frequency, and supplies the alternating current to the AC busbar AC of the ship power station. The frequency converter is connected with the DC busbar DC, and the direct current is used for controlling variable-frequency power utilization equipment through the frequency converter after frequency conversion. The invention solves a problem of energy waste caused by the condition that the rotating speeds of prime motors ME are constant and cannot be adjusted along with the load change when the change of a power utilization load of a ship under different work conditions is bigger.

The apparatus thereof comprises a main control module and a distributing module. The method thereof includes: a) said distributing module reports a message not capable of routing by itself to said main control module; b) in term of said message, the main control module looks up ARP table; if a corresponding list item is found, and then synchronizing ARP data with said distributing module. The invention can make ARP data in distributing equipment keep global consistency. Besides, the invention determines the consistency of ARP data based on the message forwarding state so as to avoid loss of synchronization data or synchronization failure caused by adding ARP list item using software.