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.

The present invention discloses a method of volume-panorama imaging processing, which generates a volume-panorama image by subsequently splicing respective image frames from an image sequence obtained in a real-time way or stored in a medium based upon the fact that the immediately adjacent image frames have the largest correlation. The method comprises the steps of: reading the image sequence, and firstly initializing an aligned image and a spliced image; dividing the i-th image frame Fi into a plurality of sub-regions; calculating a motion vector of the i-t image frame with respect to the aligned image; fitting the motion vector to calculate a transform coefficient; splicing the Fi to the current spliced image based upon the transform coefficient, and updating the aligned image; entering into a self-adaptive selection of a next image frame until the end of the splicing; and outputting the current spliced image as a resultant image. Additionally, when the image Fi is spliced, double-filtering architecture of selecting characteristic points through a filtering and selecting the valid motion vector of the selected characteristic points through the other filtering to reduce an alignment error may be adopted. According to the present invention, the volume-panorama imaging can be done quickly and accurately so that the reliability of images particularly meets a very high requirement of the ultrasonic iatric diagnose.

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 present invention discloses a method of volume-panorama imaging processing, which generates a volume-panorama image by subsequently splicing respective image frames from an image sequence obtained in a real-time way or stored in a medium based upon the fact that the immediately adjacent image frames have the largest correlation. The method comprises the steps of: reading the image sequence, and firstly initializing an aligned image and a spliced image; dividing the i-th image frame Fi into a plurality of sub-regions; calculating a motion vector of the i-t image frame with respect to the aligned image; fitting the motion vector to calculate a transform coefficient; splicing the Fi to the current spliced image based upon the transform coefficient, and updating the aligned image; entering into a self-adaptive selection of a next image frame until the end of the splicing; and outputting the current spliced image as a resultant image. Additionally, when the image Fi is spliced, double-filtering architecture of selecting characteristic points through a filtering and selecting the valid motion vector of the selected characteristic points through the other filtering to reduce an alignment error may be adopted. According to the present invention, the volume-panorama imaging can be done quickly and accurately so that the reliability of images particularly meets a very high requirement of the ultrasonic iatric diagnose.

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 method and system for measuring the frequency of a single coil vibrating instrument, wherein the method comprises the following steps: firstly, exerting alternating swept-frequency exciting signals on the two ends of a frequency measurement coil in the single coil vibrating instrument so as to drive a steel string to perform mechanical vibration; then, canceling the swept-frequency exciting signals, and forming induced voltage signals at the two ends of the frequency measurement coil, wherein the frequency of each induced voltage signal is consistent with that of the mechanical vibration of the steel ring; carrying out data acquisition on the induced voltage signals by virtue of an AD (analog-digital) converter, and carrying out FFT (fast fourier transform algorithm) spectrum analysis on the signals (acquired by the AD converter) by virtue of a digital signal processor; and finally, extracting the basic frequency signals in the spectrum according to a maximum value method, and then obtaining the frequency measurement value. The method provided by the invention has the advantages of increasing the anti-interference capacity, and improving the accuracy and reliability of frequency measurement of the single coil vibrating instrument.

The invention relates to a flexible solar battery component and a packaging method thereof, belonging to the technical field of solar photovoltaic. The flexible solar battery component consists of an inner packaging layer, an outer packaging layer and a flexible solar battery chip, wherein glue films are arranged between the battery chip and the inner packaging layer and between the battery chip and the outer packaging layer; the battery chip is coated by the glue films; the periphery of the battery chip is provided with a hot-melting and welding flexible insulating layer; a part of area of the flexible insulating layer is embedded between the two layers of glue films for coating the battery chip and is packaged into a body with the battery chip; and the other part of area of the flexible insulating layer is convex out of the battery component. The battery components are hot-melted and welded into a whole body so as to form a flexible solar battery array. The invention has the positive effects that the battery array can be folded, the quantity and the area of the components can be increased randomly according to the need; and if the reduction or damage of the performance of one or more battery components occurs in the array, the defective battery components are cut for replacement.

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.

The invention relates to a method and device for measuring the equal precision frequency of a single coil vibrating wire instrument. The method comprises the following steps of: generating induced voltage signals having frequencies accordant with the natural frequency of a string wire and attenuated amplitudes at the two ends of the frequency measuring coil; monitoring the amplitude attenuating conditions of the induced voltage signals through an induced voltage attenuating monitoring circuit; when the monitored amplitude attenuating speeds of the induced voltage signals are up to a preset value, providing a triggering signal for an equal precision frequency measuring circuit; adjusting the measuring time of the equal precision frequency measuring circuit by adjusting a standard referencepulse frequency through the precision frequency measuring circuit; and calculating the frequency of the string wire by using the equal precision frequency measuring circuit according to the induced voltage pulse sample number obtained by counting and the count value of a set standard reference pulse frequency counter. In the method, the lasting time of the measuring process can be adjusted adaptively according to the monitored amplitude attenuating conditions of the induced voltage signals activated by the string wire, so that the equal precision frequency measuring reliability of the single coil vibrating wire instrument is improved.

The invention discloses a rubber modified phase change heat conduction interface material and a preparation method, and belongs to the technical field of thermal interface materials. The rubber modified phase change heat conduction interface material is prepared from, by weight, 3-10% of basic phase change resin, 1-5% of synthetic rubber, 5-10% of tackifying resin, 0-1% of antioxidant, 0-5% of coupling agent and 69-85% of heat conduction particles. The phase change heat conduction material is especially designed for application with requirements for excellent heat conduction and longer working life; by means of reasonable formula optimization and raw material selection, excellent heat conduction performance can be achieved, and use effectiveness during longer time and reliability under special use conditions can be achieved.

The invention discloses a high-sampling-rate method for sampling value differential protection of a multi-section type self-adaption transformer. The method comprises the steps of performing high-speed sampling on three-phase currents on every side of the transformer; performing one-point difference algorithm processing on three-phase current sampling currents of every side of the transformer and compensating current amplitudes; calculating a sampling value differential current and a sampling value braking current of the transformer; performing logical discrimination of a sampling value differential protection quick-action section; performing logical discrimination of a sampling value differential protection sensitive section; and performing discrimination of sampling value differential total logic. According to the high-sampling-rate method for sampling value differential protection of the multi-section type self-adaption transformer, the problem that an existing sampling value differential protection method is large in action fuzzy area and low in sensitivity, the rapidity and the sensitivity are simultaneously met on the premise that the selectivity and the reliability are improved, and the method is good in application prospect.

The invention provides a DSP data memory active fault-tolerant method and device. The device is arranged between a DSP core assembly line and an intra-core data memory and is used for active fault-tolerant refreshing of the data memory. The device comprises a LOAD instruction code used for loading the data memory, a STORE instruction code for writing the data memory, a queue access module, an RSECinstruction decoding module, the data memory, a data error correction and detection, a universal register file, a correctable error state register, a circulating Record queue, a data memory writing operation module and an interrupt processing module used for hardware interrupt. The frequency performance of a DSP is basically not influenced through proper assembly line partitioning. According to the method and device, the fault-tolerant processing strategy and time of hardware can be flexibly controlled, the requirement for system reliability is met at a relatively low cost, and the executionefficiency of the DSP under an error abnormal condition is ensured.

The invention discloses a high-speed concurrent access method for power system large data files across a platform, which is characterized in that a cache management system capable of carrying out the unified management on all data files when a system runs and is responsible for interaction with actual disk files is set; the data files are processed in a memory-mapped file mode; the cache management system concurrently maps each portion of the data files to the minor address space in a data-processing service process one by one by using a method that the data files are divided into fixed block memory-mapped files; and the cache management system sets a high-speed buffer area which does not re-load loaded data accessing once more, thereby enhancing the efficiency and the speed of access. The high-speed concurrent access method of the power system large data files across the platform can meet the convenience, the rapidity and the reliability of an application program to the concurrent access of the large data files through the interaction of the common cache management system and the actual disk files.

The invention provides a real-time data collection system and an automatic recovery method after interruption of real-time data communication. The method comprises the following steps: an upper collector is connected between an onsite first level machine and a database server via a network, and a data collection interface is arranged in the upper collector; the data collection interface collects data of an OPCServer through an OPC protocol, the data collection interface stores the collected data in a database for cache and backup at first after collecting the data, and then the data collection interface extracts the data from the database and uploads the collected data to the database server for storage by using a TCP; and the data collection interface monitors a data uploading condition, and in the case of data uploading failure caused by an abnormal condition, the data collection interface re-loads the data subjected to uploading failure to the database server. A data cache function is realized on the collection interface, thereby reducing the pressure of the upper collector and the database server.

The invention provides a phase change graphite heat conduction material with high thermal conductivity. The phase change graphite heat conduction material with high thermal conductivity is composed of the following substances: 10-25% of base phase change resin, 0-5% of an antioxidant, 0-5% of a crosslinking agent, 1-5% of a coupling agent, and 40-80% of graphite heat conductive particles. The phase change graphite heat conduction material provided by the invention can be used for radiator interface heat dissipation and the like in the heat source component / LED assembly technology of semiconductor surface packaging, and greatly improves the heat dissipation effect and long-term reliability of heat source components and LED radiators. The product has the advantages of excellent surface wetting performance and fast and effective heat dissipation effect, good electrical performance, low cost, and especially excellent long term use effect. The preparation method of the product is simple, can be applied to mechanical process and manual use, etc., can meet the increasingly high heat dissipation requirements of high-end electronic products, like PC, game machines and high power LED.

The invention relates to a high-speed feeding and packing device for a particle material packaging machine and a control method of the high-speed feeding and packing device. The device comprises a particle material stirring mechanism, a drum type packing pump mechanism and a packaging machine system controller. The drum type packing pump mechanism comprises a pump body and a drum type packing pump. The drum type packing pump comprises V-shaped groove metering cups, a drum drive stepping motor, a drum indexing change gear set and a drum type packing pump rotating shaft. The impendent particle material feeding and packing device for the particle material packaging machine is adopted, according to the particle material feeding and packing process, the stepping motor directly drives the rotating process of the drum type packing pump, the rotating process is the particle material feeding and packing process and the material storing process of a plurality of V-shaped groove metering cups in the drum type packing pump, the particle material feeding and packing process only needs time for feeding, the time for feeding and packing particle materials is effectively shortened, and the packaging speed of the whole packaging machine is increased. The high-speed feeding and packing device is suitable for continuous particle material packaging and intermittent type (clamping plate type) particle material packaging.

A power supply management device for electric vehicle and an electric vehicle with the power supply management device. The power supply management device comprises a first management module (101), a second management module (102) and a battery module (103), wherein, the first management module (101) is connected with the second management module (102) for controlling the delay power-on of the second management module (102) when the vehicle key is turned on, to implement the power-on self-test for the vehicle controller of the electric vehicle, and controlling the delay power-off of the second management module (102) when the vehicle key is turned off, to save the vehicle data information when the electric vehicle is power-off. The battery module (103) is connected with the first management module (101) and the second management module (102) respectively for supplying power to the first management module (101) and the second management module (102). The power supply management device improves the reliability and safety of the vehicle controller.

The invention relates to a low-current line selection device and a control method for inhibiting unbalanced current by way of differential filtration. The low-current grounding line selection device comprises a multi-channel alternating-current sampled signal input interface, an operational amplifier filter module, an analog / digital conversion module, a central processor module, a power module, a human-computer module and a communication module, wherein the multi-channel alternating-current sampled signal input interface, the operational amplifier filter module and the analog / digital conversion module are sequentially connected, the analog / digital conversion module, the human-computer module and the communication module are respectively bidirectionally connected with the central processor module, and the power module is connected with each part to supply power. The device adopts a zero-sequence current differential filtration algorithm which can effectively extract zero-sequence current fault component, and therefore can effectively extract the zero-sequence current fault component in a high-unbalanced current power supply system during normal operation, and thereby the line selection accuracy of the low-current grounding line selection device can be increased.