61results about How to "Improve failure resilience" patented technology

A backup system is comprised of a main storage for storing original data and a plurality of local storages for distributing and storing the data. An encoding unit of the main storage server generates, after dividing the original data, a plurality of encoded data that is equal to or more than the dividing number by use of a code of which redundancy is variable. A distribution processing unit distributes the plurality of encoded data to the plurality of local storages, and causes the data to be stored therein. A restoring unit retrieves the encoded data corresponding to at least the division number of the original data from the local storages, and restores the original data. A redundancy control unit varies the redundancy in the encoding unit such that, the higher the importance of the data, the larger the redundancy. Furthermore, a distribution processing unit determines the distribution number such that the higher the reliability of the local storages, the more the number.

The invention provides a control optimization method and device for suppressing high-voltage direct current transmission commutation failure and belongs to the power transmission and distribution technical field. With the method and device adopted, the problem of high risk of commutation failure caused by a condition that triggering angle control output dose not satisfy a commutation requirement when a high-voltage direct-current transmission alternating-current system malfunctions in the prior art can be solved. The method includes the following steps that: whether an alternating-current fault occurs on an inverter station is detected; when it is detected that an alternating-current fault occurs on the inverter station, the triggering angle of a rectifier station is corrected, so that the triggering time of the thyristor of the rectifier station can be changed; the commutation voltage zero-crossing offset quantity and commutation voltage amplitude change quantity of the inverter station are obtained; and the turn-off angle adjustment value of the inverter station is calculated according to commutation voltage and the commutation voltage zero-crossing offset quantity, and the setting value of the fixed turn-off angle of the inverter station is adjusted. The control optimization method and device provided by the embodiments of the present invention are applied to optimizing the commutation process of high-voltage direct current transmission.

The invention relates to an Openflow-based network highly-fault-tolerant virtual network mapping algorithm comprising: a SDN control layer acquires low-layer network equipment load information supporting an Openflow protocol in real time and dynamically updating the network equipment load information; acquiring the data of a request for establishing a virtual network by analysis of the demands of different application services in an application layer, and computing a virtual network satisfying a mapping requirement according to an ant colony algorithm; and deploying the virtual network in low-layer network equipment by using the control layer in order to satisfy an individual requirement. The mapping algorithm improves the fault-tolerant capability and the failure recovery capability of the virtual network, guarantees QoS, and improves network robustness.

The invention discloses a modeling method for achieving distributed-generation-contained power distribution system fault recovery. The modeling method comprises the following steps of (1) reading original data of a distribution network, using a switch as the boundary to carry out partition on the distribution network, and using the switch as a decision variable; (2) forming an adjacency matrix of a region to be recovered; (3) forming a reachable matrix of the region to be recovered; (4) forming the Boolean function about various fault recovery constraints; (5) carrying out merging to form a final mixed decision diagram, carrying out conversion to form an orderly binary decision diagram, and contracting a solution space; (6) determining an optimal fault recovery scheme for the contracted solution space according to a priority of an objective function. The modeling method for achieving distributed-generation-contained power distribution system fault recovery can effectively reduce the complexity for solving the distributed-generation-contained power distribution network fault recovery problem, and can have the advantages of being high in computation speed, high in credibility of solutions, good in actual operability of projects and the like.

The invention relates to a classification-type secretarial document management system and method, which improves the document management efficiency and organically combines a document treatment system and a document management system. The classification-type secretarial document management system comprises a user role management module, a document recording module, a document settling and cataloging module, a document content management module and a document borrowing and inquiring module, wherein the user role management module is used for setting user authorities in the system by filing, borrowing, examining and approving documents, setting authorities and auditing track rules; the document recording module is used for collecting secretarial documents and storing the collected secretarial documents into a secretarial document database; the document settling and cataloging module is used for establishing catalogs of a document system; the document content management module is used for implementing file mount between the recorded secretarial document and the corresponding catalogs; and the document borrowing and inquiring module is used for inquiring secretarial documents from the secretarial document database according to the set user authorities. The invention has the advantages of expandability, reliability, maintainability, universality, high efficiency, transportability, safety, easy operations and complete functions.

The invention relates to an out-off-band central management method of an outside communication cabinet environment monitor. The communication cabinet is equipped with a communication apparatus, an environment monitor unit and a sensor, the communication apparatus connects with a communication apparatus network management unit through a communication linkage which has characteristics in including: the environment monitor unit connects with the environment monitor central management unit through an independent out-off-band linkage; the sensor sends collected environment monitor information into the environment monitor unit; the environment monitor unit transmits environment monitor information by the out-off-band linkage into the environment monitor central management unit through an upper link interface; the environment monitor central management unit processes central management for environment monitor information of the outside communication cabinet, dynamic adjusts environment collocation of the communication cabinet or gives an alarm. The method can realize central management for environment monitor information of outside cabinet, also realize inquire and monitor in real time to outside cabinet operation environment.

The invention relates to a low voltage ride through (LVRT) control method for a doubly fed induction generator (DFIG) wind generating system of a series grid-side converter (SGSC) based on static bifurcation control, which comprises the following steps of: (1) performing topological modeling; (2) realizing the low voltage transition of a DFIG by controlling the output voltage of the SGSC; (3) selecting a doubly fed generator parameter, and simplifying to obtain a topological structure of the wind generating system equivalently; (4) determining the state variable, input variable and output variable of the system, and detecting the voltage and current of a stator at the end of the generator; (5) solving a static bifurcation point; (6) reducing active power output by the generator according to the drop degree of power grid voltage in the failure process so as to fulfill the aim of inhibiting voltage drop; and (7) turning on an insulated gate bipolar transistor (IGBT) switch, and merging an energy-consuming resistor into a direct-current side to inhibit direct-current link voltage from rising and realizing the LVRT operation of the system when a power grid has voltage drop failure.

The invention relates to a fault detecting and control method of an SIP service program, and discloses a restoring method of service process fault of an SIP server and an SIP server; the restoring method of service process fault of the SIP server comprises the following steps: a. a calling keep-alive module is provided in the monitoring process, and the calling keep-alive module uses a distributed user name in an SIP system and has corresponding function; b. the calling keep-alive module sends calling information periodically; and c. if receiving the response of fault calling, the calling keep-alive module informs the SIP server of starting a fault restoring program. The invention also provides an SIP server with the corresponding function. The invention uses certain characteristics of the SIP service, such as registration, calling and the like, to carry out keeping alive of the service, combines the mode of process monitoring to carry out fault restoration, and uses an SIP protocol stack to carry out protocol interaction, thus further improving the reliability of the system and the usability of the service.

The invention provides a method for interacting traffic information data and commands. The method includes that a data processing subsystem distributes I/O (input/output) data channels for clients; data transmitted by the clients enter the I/O data channels to be processed, a client verification module of the subsystem verifies the legitimacy of each client; a transaction monitoring subsystem adds correct verification information into a data state archive if connection of the clients is legal; a multi-job scheduling module of the data processing subsystem extracts idle threads from a thread pool and decrypts the data in a high-speed parallel mode; the transaction monitoring subsystem records log no matter whether the data are legal or not; the data are cached in local hard disks; a data processing module of the data processing subsystem extracts databases in a database connection pool and connects the databases to corresponding databases; processing is completed if the data are completely, effectively and correctly stored in databases in a database storage procedure; and the data are transmitted to a fault correction server to be subjected to data fault tolerance if the data cannot be normally stored in the databases, and then the data are stored again.

The invention particularly relates to a PV snapshot distributed database cluster recovery method. The PV snapshot distributed database cluster recovery method includes: adopting automatic process deployment under the environment of Kubernets, including two parts of cluster node information filtering and cluster creation; when the distributed database cluster in container scheduling fails or data loss occurs, automatically starting the non-cluster nodes, filtering the host information of cluster nodes to remove the snapshot recovery data, keeping the data information of nodes, and quickly creating the distributed database cluster. The PV snapshot distributed database cluster recovery method does not rely on the cluster specific node information, automates the operation, reduces manual intervention, can quickly restore the backed-up snapshot data to the newly created normal cluster, improves the failure recovery ability of the distributed cluster, and guarantees the availability of the cluster.

The invention provides MMORPG server architecture. The main system comprises a login gateway, a game gateway, a game server, a database server, a payment server, a pushing server, a resource server and a log server; the servers use the TCP communication except the log server which uses the UDP. By using the single game main logic server (GameServer) multi-game gateway (GameGate) architecture, eachserver is clear in function, higher in efficiency and easier to maintain.

Disclosed in an embodiment of the present application are a service resource pre-configuration method, device and system. The method comprises the steps that after a first working path is established, a first node sends a first path message to a second node, wherein the first path message is used for indicating the second node to pre-configure a second channel resource, and the second node preconfigures the second channel resource according to the first path message. By implementing the embodiment of the invention, quick service automatic recovery can be realized, and the fault recovery performance is improved.

The invention relates to the technical field of new energy automobile structures and control, in particular to a control method of a high-pressure hydrogen storage system. The method comprises the steps: controlling the hydrogen storage system comprising a plurality of hydrogen supply paths, collecting the in-bottle pressure change value of a high-pressure hydrogen storage bottle at a pipeline inlet in each hydrogen supply path and the pipeline pressure change value of each hydrogen supply path, and comparing the collected in-bottle pressure change value and pipeline pressure change value witha pressure limit value; judging whether the hydrogen supply paths break down or not: if yes, controlling an electromagnetic valve at the outlet of the fault hydrogen supply path to close the hydrogensupply path, and if not, opening the electromagnetic valve at the outlet of each hydrogen supply path to enable the high-pressure hydrogen storage bottle of each hydrogen supply path to supply hydrogen to a galvanic pile. The control method is extremely simple and efficient, whether the hydrogen supply path is opened or not is selected according to the fault condition of each hydrogen supply path, the whole method can cope with various fault conditions, and efficient and safe hydrogen supply of the galvanic pile is ensured.

The embodiment of the invention discloses a call center system, a signal transmission method and device, a server and a medium. The system comprises a telephone traffic server, a plurality of softphone servers and a plurality of signal transmission servers, wherein the plurality of softphone servers are respectively connected to the corresponding signal transmission servers according to a preset mapping relationship, and each signal transmission server is connected with the telephone traffic server; and the number of the softphone servers connected with the signal transmission server is less than or equal to the supportable maximum concurrency number of the signal transmission servers. According to the technical scheme provided by the embodiment of the invention, simple and safe signal transmission between the softphone server taking the signal transmission server as an intermediate bridge and the telephone traffic server can be realized, and the concurrent processing capability and the fault strain capability of the system can be improved through multi-link transmission; balanced distribution between each softphone server and each signal transmission server can ensure stable operation of the system.

The invention discloses a multi-feed-in direct-current power transmission system control optimization method and device and a storage medium, and the method comprises the following steps: calculatinga direct-current voltage correction coefficient of a feed-in system according to a voltage measurement value of a direct-current side of each feed-in system and a voltage rated value of the direct-current side of each feed-in system; calculating a multi-feed-in mutual influence factor according to the voltage value of each DC system current conversion bus, judging whether each multi-feed-in mutualinfluence factor meets a preset interaction intensity condition or not, and obtaining a DC voltage setting value of each feed-in system low-voltage current limiting link according to a judgment result; switching the voltage value of the direct-current side of each feed-in system into a direct-current voltage setting value when any one of the feed-in systems is in an alternating current fault state; detecting the feed-in system is in a normal operation state, and enabling the direct current sides of the feed-in systems to operate according to the corresponding voltage rated values, so that theprobability of commutation failure of non-fault systems at the same time can be effectively reduced, and the commutation capability and the fault recovery capability of the multi-feed-in direct current power transmission system are improved on the whole.

The embodiment of the invention discloses a differential positioning system and method based on a satellite, a data center receives differential correction information uploaded by each differential station, and the differential correction information is determined and obtained by the differential stations according to two paths of initial differential correction information calculated by a first differential processing module and a second differential processing module. The first differential processing module and the second differential processing module have different hardware architectures and differential correction algorithms, so that the problem of differential correction information errors caused by single hardware faults or algorithm errors is avoided. When the data center receives a positioning request sent by the terminal equipment, a target differential station meeting the differential correction requirement is selected according to the position information of the terminal equipment and the position information of each differential station. The appropriate differential station is selected based on the position information, so that the selected differential correction information is more suitable for the actual coordinate condition of the terminal equipment. Two paths of initial differential correction information are calculated through two different modes so that the fault resistance of the satellite system is improved.

The invention discloses an automatic train monitoring system. The automatic train monitoring system comprises terminal equipment and an application server, the terminal equipment is used for drawing and displaying a station yard graph according to the station yard information; generating a control instruction according to the operation of a user on a target component in the station yard graph; an instruction processing request is sent to the application server, and the instruction processing request is generated according to the control instruction; the application server is used for receiving the instruction processing request; and processing the control instruction through a corresponding processing module according to the security type corresponding to the control instruction. According to the system, the safety types corresponding to different control instructions are distinguished, and the corresponding processing modules are used for processing the control instructions of the corresponding safety types, so that logic separation of processing flows of common control instructions and control instructions needing safety operation is realized, and the overall fault-tolerant capability and the fault recovery capability of the system can be improved.