274results about How to "Meet reliability" patented technology

The invention relates to a method and a system for building a big data distributed log. The method comprises the following steps that: 1, a log transmission sub system receives log data from a service system, generates a UUID (Universally Unique Identifier) for each piece of received log data, and sends the log data with the UUID to a log storage sub system through a plurality of nodes after the load balance; 2, the log storage system receives the log data, and stores the log data in a horizontal expansion mode; and 3, a mass log processing sub system extracts the log data stored in the log storage sub system, uses a MapReduce algorithm to regularly perform mass pre-processing on the log data, and generates a report by the hour and a report by the day to be required by an external service report system. The method and the system have the advantage that the requirements on the reliability, the real-time performance, the high performance, the high expandability and the maintainability of a log system under the big data condition can be met.

The invention discloses a method and a device for allocating PDCCH resources, which is used in a communication system comprising a plurality of cells and allocates PDCCH resources for cell edge users or cell center users in the cells. The method comprises the following steps: dividing PDCCH resources into a plurality of control channel unit CCE sets; configuring main CCE sets and subsidiary CCE sets for the cells based on the CCE sets; and allocating the resources of the main CCE sets to the cell edge users, and allocating the resources of the subsidiary CCE sets to the cell center users. The invention improves the carrying capacity of the PDCCH channel transmission, ensures the reliability of the PDCCH transmission for the edge users, and meets the QoS requirements of the users.

The present invention relates to an air conditioner provided with a user detection device and a control method thereof. The air conditioner uses a cheap multichannel heat sensor to judge whether a user exists and the distance to the user, and controls the operation of the air conditioner based on the judgment. With this end in view, the air conditioner provided by the invention conditions the air of the conditioned space through regulating the direction and quantity of the discharged air. The air conditioner comprises the following components: a user detection device which is used for detecting the user information through the temperature value that is measured by a plurality of channels and is generated by the heat source existing in the conditioned space; and an air conditioner control part which is used for judging the user information existing in the conditioned space based on the measured temperature value and controls the operation of the air conditioner based on the judged user information.

A minisize distribution controlling system for satellite includes: the system attempering and controlling circuit, the 1553B bus interface circuit, the simulation quantity telemetering circuit, the digital quantity telemetering circuit, and the switch dictate outputting circuit. The invention can achieve the independent online monitoring of the satellite system with higher reliability and stability, brings the design idea and achieving method of data collection and processing based on FPGA technology.

The invention discloses a control and switch method for redundant submodules of a modular multilevel converter. The converter monitors a voltage value of a redundant submodule support capacitor in the normal running process. When voltage of two ends of the redundant submodule support capacitor of a phase of bridge arm is larger than or equal to a first preset value and smaller than or equal to a second preset value, the redundant submodules are in a switch-out state; when the voltage of two ends of the redundant submodule support capacitor is smaller than the first preset value, the on-off states of a first switch tube and a second switch tube are determined according to a modulation mode and a submodule direct voltage balance control strategy; and till the voltage of two ends of the redundant submodule support capacitor is equal to the second preset value, the second switch tube is connected for afterflow, otherwise, a message of a overvoltage fault of the redundant submodules is sent, so that the protection action is executed. According to the control and switch method, the redundant submodules can be connected to bridge arms at the highest speed to replace fault submodules, so that the stability of voltage of the direct current side of the converter is maintained, the balance in voltage between capacitors of the submodules of the upper bridge arm and the lower bridge arm is kept, the reliability is improved, and the availability ratio is increased.

The invention relates to an air supervision internet of things system with a low-altitude aircraft, which comprises a global positioning system (GPS) satellite, the low-altitude aircraft provided with ADS-M transceiver airborne equipment, a mobile communication cellular cluster base station, a ground mobile communication cellular cluster base station cluster service platform, an internet and a low-altitude aircraft air traffic control center; and the ADS-M transceiver airborne equipment is installed in the low-altitude aircraft, carries out upper and lower data link data communication with the mobile communication cellular cluster base station by adopting a TD-SCSMA/TD-HSDPA or GSM/GPRS/EGPRS or WCDMA/CDMA2000 or GSM/GPRS communication mode and is connected with the low-altitude aircraft air traffic control center through the ground mobile communication cellular cluster base station cluster service platform and the internet.

The invention provides a universal erection load simulation device which comprises an erection load simulation device, a lower fulcrum moving device, an upper fulcrum moving device and a safety protection device; the universal erection load simulation device is mainly used in a vertical erection simulation test under the practical working conditions of idle load, full load and unbalance load to test and verify the erection time, the erection angle and the erection position accuracy, to test and verify the power matching of a power supply, an erection controller and an erection electric cylinder, to test and verify the performances of the pushing force, the operation speed, the level shifting stability and the gear shifting stability of the erection electric cylinder, and to verify the normal and abnormal power-loss brake performances in the erecting and leveling processes; the motion process of an erection mechanism is simulated, a motion parameter equation of each member is deduced, the overall process of change of the motion parameter is accurately reflected, the stress and the displacement of main stress parts of a launching vehicle are intuitively truly known and predicated, a weak link of a system is found out and improved, so that the requirements of rapidity, stability, reliability, safety and the like in the erection process of a guided missile are met.

A method for measuring geometric parameters of a track by adopting a camera comprises the following steps: a measuring vehicle is placed on the track to be measured; a camera device is fixedly installed on one end inside the measuring vehicle; an optical axis of the camera device is in parallel with the plane of the bottom of the measuring vehicle; two sign posts are arranged on the track at the other end inside the measuring vehicle and are respectively perpendicular to the two sides of the plane of the bottom of the measuring vehicle; the two sign posts are at different heights and at the distance of r; a cooperation sign is arranged at the top end of each sign post; the sign posts can only move in the direction perpendicular to the plane of the bottom of the vehicle and in the transversal direction; a wheel at the bottom of the sing post moves, and is tightly attached to the inner side of a steel track; when the measuring vehicle moves on the track to be measured, the camera device is utilized to capture images of the cooperation signs at different time; and the images is processed through image processing and data processing on a real-time basis so as to acquire the geometric parameters of the track. The method meets the requirements of modern track construction and development, satisfies the requirements of high precision, high reliability and high automatic degree detection, and has good application prospect in the railroad engineering field.

The invention relates to a laboratory environment and equipment wireless monitoring and alarming system, belonging to the wireless monitoring field. The system comprises n wireless probes, one base station node, one PC and a prepared monitoring program therein, one GSM module and a user mobile phone, wherein, n is a positive integer; and the wireless probes establishes alletizin with the base station node through a short distance wireless communication protocol networking, the base station node is accessed into the PC by a serial port, the GSM module is accessed into the PC by a USB interface, and the PC is used for operating the monitoring program. The system can realize reconfigurability and availability of equipment by designing the wireless intelligent probes, realize convenient system layout by a short distance wireless communication technology, realize variety and realiablity of an alrming mode by the GSM module, and realize real-time property for updating wireless probe parameters by an online parameter table synchronization technology.

The invention discloses a dual-redundancy flexible strapdown inertial measurement system. According to the invention, redundancy design is conducted on strapdown inertia units. Two groups of flexible strapdown inertial measurement systems are mounted on a rocket body in parallel through a vibration reduction support; each group of flexible strapdown inertial measurement system comprises three dynamically-tuned gyroscopes with two degrees of freedom, four quartz accelerometers, servo loops and I/F change-over circuits; the servo loops are matched with the dynamically-tuned gyroscopes and the quartz accelerometers. The dual-redundancy flexible strapdown inertial measurement system has the advantages as follows: the reliability and precision are increased; the operating requirements of high reliability and precision of manned space flight are met; the vibration reduction support is designed according to structure symmetry and temperature fields; collimation prisms are mounted at the symmetry positions of structures and the temperature fields, so that deformation caused by stress and temperature is efficiently prevented from affecting azimuth deviation.

The invention provides a secure computer platform used for a rail transit. The secure computer platform used for the rail transit comprises a first host device, at least one second host device, a first communication transfer device, at least one second communication transfer device, a first input/ output device, at least one second input/ output device, an Ethernet and a FlexRay bus, wherein the first input/ output device, the second input/ output device, the first network connection end of the first communication transfer device and the third network connection end of the second communication transfer device are connected with the FlexRay bus, the second network connection end of the first communication transfer device and the fourth network connection end of the second communication transfer device are connected with the Ethernet, the first host device and the first input/ output device are communicated through the Ethernet, and the second host device and the second input/ output device are communicated through the Ethernet.

The invention relates to a water quality in-situ pre-treatment method in a water source region. According to the method provided by the invention, a water channel is arranged according to a terrain of the water source region by taking a water fetching opening of a water supply plant as an end point, a photocatalytic purification region, a combined ecological floating bed purification region and an aquatic plant purification region are separately arranged along the water channel, and in-situ pretreatment is carried out on an inflow of the water supply plant in the water channel. The water channel is enclosed by isolating barriers, and a block for intercepting garbage and floating plants is arranged at the water inlet end of the water channel. The three purification regions can be combined in adaptation to local conditions. Compared to the prior art, the method provided by the invention effectively couples four in-situ water quality purification technologies: photocatalysis, ecological floating bed, ecological contact oxidation filler and plant repair. The method is simple in structural design, low in material cost, small in interference by construction and operation on the outside world, simple to maintain and manage, free of additional added chemical agents and safe and free of secondary pollution and can be used for effectively improving the inflow water quality of the water supply plant, so that the main water quality indexes are enhanced by at least one grade.

The invention discloses a user identity authentication system, belonging to the field of computers. The system comprises a server, a client and a databank, wherein the server respectively communicates with the client and the databank. Corresponding to the system, the invention discloses an authentication method of the user identity authentication system; the method comprises the following steps: (1) a user accesses to a Web server through the client; (2) the Web server queries user information through the databank; and (3) the user information queried in the databank is transmitted to a user authentication server to be authenticated, if the authentication is correct, the user is allowed to log in, relevant information of the user is displayed, and a unique and unrepeated authentication key is set up; or else input error is displayed. The system supports the lead-in of third-party user information and different authentication modes of the third-party, so that the situation that multiple systems use different user authentication systems is avoided, and thus the use complexity of users is reduced.

The invention discloses a three-dimensional scheduler model and a scheduling algorithm thereof. According to the three-dimensional scheduler model and the scheduling algorithm, after the time certainty, safety and reliability of various types of real-time tasks are analyzed, various types of real-time task models are converted into a uniform three-dimensional hierarchical relationship model, then a scheduling strategy is adjusted according to the hierarchies of the tasks and finally the scheduling strategy is mapped into a two-dimensional space-time diagram corresponding to a core. The strategy not only considers the load balance to enhance the parallel execution efficiency of a plurality of cores, but also needs to satisfy the demands of real-timeliness, reliability and safety in the task execution process. Moreover, the model and the algorithm are used for researching a mechanism for synchronizing the shared resource of various real-time tasks so as to obtain a new shared resource management scheme, so that the occurrence of deadlock is decreased and the CPU hunger is prevented.

The present invention discloses a comprehensive stress acceleration test method, comprising selecting failure stresses, such as S and S, having smaller coupling effects from all failure stresses S of a product as test comprehensive stress; determining the maximum stress levels S<max> and S<max> under the condition that the failure mechanism of the product is not changed according to existing test information or history similar product fault information; designing an orthogonal test based on the information according to reasonable selection of the test stress levels and reasonable selection of test samples; obtaining failure data t<hlk> of the samples under combination of different comprehensive stress levels; obtaining an acceleration model of the stress S satisfying product characteristics by fitting according to data of failure changes of the product along with changes of the magnitude of the stress S under the condition that the magnitude of the stress S is constant, and obtaining an acceleration model of the product under the stress S in the same way; obtaining acceleration model parameters under the various stresses; converting the failure data t<hlk> under the comprehensive acceleration stress into failure data t'<hlk> under the conventional comprehensive stress; and finally fitting a product fault probability distribution expression in a failure probability distribution manner, and completing verification or evaluation of indexes of product reliability.