87results about How to "Consistent state" patented technology

A service provisioning mediator entity in a communications system is provided with information defining a set of service provisioning triggering messages. In response to receiving a service provisioning triggering message including an identifier associated with a user from a further network entity involved in providing the service to the user, the service provisioning mediator entity triggers service provisioning in the communications system for the user. The service provisioning triggering message may be sent by a controlling network entity upon receiving from an information store a message indicating that a user attempting to register is not recognized. If the user is recognised, trigger information in the information store may be used for directed a session to a network entity configured to handle service provisioning triggering messages. As a further alternative, a user may request rervice provisioning by sending a service provisioning triggering message from a communication device.

A method for checkpointing a multithreaded application program, based on the egalitarian and competitive active replication strategy. The invention enables different threads to be checkpointed at different times in such a way that the checkpoints restore a consistent state of the threads at a new or recovering replica, even though the threads operate concurrently and asynchronously. Separate checkpoints are generated for the local state of each thread and for the data that are shared between threads and are protected by mutexes. The checkpoint of the shared data is communicated in a special message that also determines the order in which the claims of mutexes are granted to the threads. A source-code preprocessor tool is described for inserting code into an application program to checkpoint the state of the thread during normal operation and to restore the state of the thread from the checkpoint subsequently.

A network control system that achieves high availability for forwarding state computation within a controller cluster by replicating different levels of table state between controllers of the controller cluster. To build a highly available controller cluster, the tables for storing the forwarding state are replicated across the controllers. In order to reduce network traffic between the controllers, fewer tables are replicated to slave controllers, which then recompute the forwarding state of the master controller in order to have a replicate copy of the master controller's forwarding state for possible failover. In other embodiments, more tables are replicated to minimize the recomputations and processor load on the slave controller. The network control system of some embodiments performs continuous snapshotting to minimize downtime associated with reaching a fixed point and replicating the state.

The system and method described herein may use reverse path lookup to build mappings between file handles that represent network file system objects and full path names associated therewith and distinguish hard links between different file system objects having the same identifier with different parents or file names. The mappings and information distinguishing the hard links may then be cached to enable replicating changes to the file system. For example, a server may search the cached information using a file handle associated with a changed file system object to obtain the file name and full path name associated therewith. The server may then send the file name and full path name and metadata describing how the file system object was changed to a replica host, which may then replicate the change to the file system object.

The system and method described herein may use reverse path lookup to build mappings between file handles that represent network file system objects and full path names associated therewith and distinguish hard links between different file system objects having the same identifier with different parents or file names. The mappings and information distinguishing the hard links may then be cached to enable replicating changes to the file system. For example, a server may search the cached information using a file handle associated with a changed file system object to obtain the file name and full path name associated therewith. The server may then send the file name and full path name and metadata describing how the file system object was changed to a replica host, which may then replicate the change to the file system object.

The invention discloses an automatic torque applying calibrating apparatus for a torque spanner. The automatic torque applying calibrating apparatus is formed by a servo motor, a speed reduction mechanism, flexible couplers, connectors, a torque sensor, radial support mechanisms, a check arm mechanism, a machine body guide rail and a measuring control system, wherein the torque sensor is arranged between the two radial support mechanisms; one end of the torque sensor is connected with one flexible coupler by one connector while the other end is connected with a square tenon of the calibrated torque spanner by the other flexible coupler and the other connector; the connector connected with the square tenon of the calibrated torque spanner is kept horizontal under the common action of the radial support mechanisms and the flexible coupler, so the gravity center of the torque spanner is kept vertical and downward. Influence to the toque sensor and the torque spanner caused by poor component generated in the calibration process is avoided, influence to an indication value of the torque sensor caused by the self weight of the torque spanner is eliminated, the torque applying is automatically performed, the torque applying speed is accurately controlled, the accuracy of the calibrating apparatus for the torque spanner is improved, the calibrating accuracy of the indication value of the torque spanner is improved, the labor intensity is reduced, and the calibration efficiency is improved.

The invention provides a virtual reality rock climbing machine. By means of the virtual reality rock climbing machine, rock climbing scenes can be selected indoors according to personal preferences. The virtual reality rock climbing machine comprises a rock climbing machine physical structure and a control system. The rock climbing machine physical structure comprises a main motor, a chain belt, chain plates, installation holes, rock climbing supporting points, a stable supporting structure and a slow descent structure. The control system is arranged on the rock climbing machine physical structure. A virtual reality technology and a real-time human skeleton capturing technology are introduced into rock climbing fitness exercises, users can autonomously select sceneries around the world as the virtual reality rock climbing scenes and can select various game modes, such as teaching, games and networking races, and immersion type rock climbing experience brought by virtual reality enables the users to be filled with fun and excitement in the rock climbing process.

The invention discloses a real-time data synchronization method and system between main and standby nodes. The method comprises the following steps: starting the system, realizing the data synchronization from a main node to a standby node in a total synchronization mode; after the total synchronization, modifying the configuration parameter of the main node, and realizing the data synchronization from the main node to the standby node in an incremental synchronization mode; during the incremental synchronization, synchronizing the data to the standby node in an internal memory copy mode; and modifying the data by the standby node according to the copied information, and refreshing the configuration parameter according to the modified data. By adopting the real-time data synchronization method and system disclosed by the invention, the instantaneity of data synchronization is obviously improved, and the consistency of the service operation state and the configuration parameter and other information of the device before and after the handover of the main and standby nodes is guaranteed.

The invention discloses a high-altitude satellite power control device accelerated life test system and method. The system comprises a high-temperature test chamber, a power control device, a solar battery array simulator, a storage battery pack simulator, an electronic load and a test process control computer, wherein the high-temperature test chamber is used for providing high-temperature environment required by a test; the power control device is put in the high-temperature test chamber, and is used for adjusting input current of the solar batter array simulator according to power requirement of the electronic load, and managing the charging/discharging of the storage battery pack simulator; the solar battery array simulator is used for simulating input power of a solar battery array ina light period; the storage battery pack simulator is used for realizing charging and discharging functions of a storage battery pack in an earth shadow period; and the electronic load is used for simulating on-satellite electricity loads. The method comprises the following steps of: 1) establishing an acceleration model; 2) carrying out electric performance test before acceleration; 3) carryingout a high-temperature life test; 4) carrying out electric performance test after the acceleration; and 5) analyzing the test result.

The invention relates to a cylinder sleeve fatigue test device. An annular sunk groove (13) and an annular sealing protrusion (14) used for supporting a cylinder sleeve (3) are arranged on a bearing cylinder body (1), a counter bore matched with a combined cylinder cover (2) is formed in an upper opening of the cylinder body, an oil inlet port and a sensor port are formed in an oil inlet (6) and an upper port of a pressure monitoring hole (7) in the cylinder body respectively, the cylinder sleeve (3) is arranged in the bearing cylinder body (1), the combined cylinder cover (2) is arranged in the counter bore of the combined cylinder cover (2) and the cylinder sleeve (3) in a sealing sleeved mode, a cylinder cushion (4) is arranged at the position where the combined cylinder cover (2) is connected with the cylinder sleeve (3), and an upper edge opening of the cylinder sleeve (3) and a simulation combustor cavity form a simulation combustor (8). According to the cylinder sleeve fatigue test device, sealing hidden troubles in the cylinder body are eliminated, stability of the test process is improved, the adjusting range of the pressure in the cylinder body is enlarged, and a cylinder sleeve fatigue examination and a fault reappearance test are facilitated.

The invention discloses a novel power microcomputer operation anti-error system and an operation method thereof. The system comprises a background anti-error host, a field terminal, switch cabinet spacing anti-error covers, and a network system. The panels of the switch cabinet spacing anti-error covers are provided with operation holes. Each switch cabinet spacing anti-error cover is provided with a spacing anti-error control device consisting of an operation hole locking device and an spacing guide indicating lamp module, wherein the operation hole locking device is an operation hole locking panel, and the operation hole locking panel is arranged at the operation hole side of the switch cabinet spacing anti-error cover. The operation method comprises the following steps: the background anti-error host makes out a ticket and sends a short message to the mobile phone of a corresponding person; and the corresponding person carries out operation in order according to the operation content on the display screen of the field terminal. By combining the operation anti-error system and the operation method with the network system, real-time state alignment is realized, real-time operation result transmission is ensured, integrated anti-error intelligent management and collaborative operation in the whole process of power distribution operation are realized, and possible misoperations in all links of power supply and distribution are effectively eliminated.

The invention provides an on-site corrosion detecting method and device. The method comprises the following steps: analyzing a corrosion environment in a position to be detected; collecting material and state information of a device in the position to be detected; selecting a sample type and a coupon rack type, and loading the selected sample on the coupon rack; arranging the loaded coupon rack in the position to be detected, and performing on-site implementation; and taking down the sample from the coupon rack, and performing corrosion evaluation on the sample. The invention has the following advantages: the device is simple in structure and convenient to assemble; multiple samples with different material and tissue states can be hung at one time; the fluid flow state on the surface of the sample conforms to the environment; the device is light in weight, and can not cause an obvious stress to a wall; and the device is convenient to mount and demount.

The invention relates to the technical field of wafer processing, in particular to a processing jig. A wafer processing jig comprises a bearing platform, wherein an adsorption mechanism is arranged on the bearing platform. The adsorption mechanism comprises a plurality of adjustment adsorption holes formed in the middle of the bearing platform and a plurality of fixing adsorption holes formed in the periphery of the bearing platform. The fixing adsorption holes are formed in the bearing platform in a circular ring shape, and the adjustment adsorption holes are formed in inner sides of the fixing adsorption holes. The fixing adsorption holes are connected with a fixed air suction device through an air channel. The adjustment adsorption holes are connected with an adjustment air suction device through an air channel. Adsorption air pressure of the adsorption holes is adjusted through adjustment of the air suction devices. The wafer processing jig solves clamping and fixing problems of a wafer in processing and proofing stages, and guarantees that the state of a middle area and the state of the periphery of the wafer are consistent so that processing quality is uniform.

A selection method of transmission equipment business board bus is used in the system with a main and a secondary business control board and a dual bus connection between the main and the secondary business control board and the business board. The method includes the following steps: (a) before each bus selection judgment, the business board judges message received by a backboard about whether relevant units of the main and the secondary control board business processing are ready and preserves the prior status after judgment; (b) in the bus selection judgment course, use the preserved prior status as the basis about whether the main and the secondary control board business processing relevant units received by the backboard bus are ready and the bus selection judgment. The invention can effectively improve the reliability of transmission equipment business board bus selection.

The invention discloses a thermal fatigue test device of a piston. The thermal fatigue test device is composed of a support frame, a non-standard piston tool, a tested piston, branch cooling water pipes, a thermal insulation board, and a main cooling water pipe. With the non-standard piston tool, the mechanical constraint of the tested piston on actual assembling condition is simulated completely;on the basis of cooperation of the cooling pipes, the thermal insulation board, and an external heating device, the temperature field of the tested piston on the actual working condition is simulatedcompletely. Thermal fatigue testing of pistons with different numbers is realized by flexible cooperation of the support frame and the tool. With the thermal fatigue test device disclosed by the invention, the actual assembling condition and cooling environment of the piston can be simulated fully; the arrangement condition can be adjusted flexibly based on the number of the tested pistons; the progress of the thermal fatigue test of the piston is controlled reasonably; the usage energy is optimized; and the credibility of the thermal fatigue test result of the piston is enhanced substantially.