73results about How to "Solve complex problems" patented technology

The invention relates to a polar code SC decoding-based partial sum method. The objective of the invention is to solve the problem of complex computation in a decoding process of polar codes. The method includes the following steps that: as for the input signals U<N>1 of N information bits, hierarchical polarization coding is performed on U<N>1 according to a coding direction, wherein U<N>1 is expressed by an equation described in the descriptions of the invention; V<N>1 is the sequence of partial sum computation, the maximal term of the V<N>1 is partial sum S<N>il=U<N>1Pi; a computation generation sequence expression V<N>1 of the partial sum is inferred through utilizing the generation rules of the partial sum; the computation rules of T1,T2...Tk is proved through utilizing an induction method; and a bit estimated value u<^>i=hi(y<N>1, u<^i-1>1) is determined; and the likelihood ratio (LR) of an N-dimensional channel is determined; and the likelihood ratio (LR) is determined when N is 1. The polar code SC decoding-based partial sum method of the invention is applied to the partial sum filed of SC decoding.

The invention brings forward a power transmission line online monitoring circuit and an intelligent insulator suspension ring. The online monitoring circuit is integrated with a flashover monitoring function, a micro meteorology monitoring function, a leakage current monitoring function and a power transmission line icing monitoring function. At the same time, the monitoring circuit is combined with an insulator suspension ring. Through embedding a strain sensor, a leakage current sensor, a flashover sensor, a leakage current theft power supply module, a Beidou/GPS positioning module, a wireless signal transmission module and the like into the suspension ring, the insulator suspension ring becomes the intelligent insulator suspension ring with an online monitoring function, the intelligent suspension ring has a lead weight online monitoring function, an integrated leakage current online monitoring function, a flashover counting function and a positioning function, and the effectiveness and real-time performance of power transmission line sate monitoring are substantially improved.

The invention provides a two-dimensional joint acquisition method for direct sequence spread spectrum MSK signals in a high dynamic condition. The method comprises the following steps: intermediate frequency direct sequence spread spectrum MSK signals are subjected to a receiving conversion filter, down conversion, low pass filter and extraction processing, and approximate direct sequence spread spectrum BPSK signals are obtained; joint acquisition is carried out on the approximate direct sequence spread spectrum BPSK signals and a local code, and the estimated value of a code phase error and the estimated value of Doppler frequency shift are acquired; and after Doppler compensation is carried out on the approximate direct sequence spread spectrum BPSK signals based on the above estimated values, accurate code tracking and despreading and demodulation can be carried out subsequently, and information is acquired. The two-dimensional joint acquisition method for direct sequence spread spectrum MSK signals in a high dynamic condition is extremely applicable to a high-dynamic low-signal-to-noise ratio application environment, and has the advantages that the algorithm complexity is little; pseudo-code phase and Doppler frequency offset acquisition can be completed at the same time; and the estimation error is little in the high dynamic condition.

The invention discloses a self-reinforced bionic material, comprising a reinforced phase prepared from a biodegradable polymer A with high molecular weight and high crystallinity, and a matrix resin phase prepared from a biodegradable polymer B with molecular weight and crystallinity lower than those of the biodegradable polymer A; the reinforced phase and the matrix resin phase are stacked by a guide die; and the stacking percentage of the reinforced phase is 30-90%, and the stacking percentage of the matrix resin phase is 5-60%. The invention also provides a manufacturing method of the self-reinforced bionic material. The invention employs ultrasonic transient heating and interface mechanism with controllable strength to solve a problem for keeping melting fiber morphology when the difference of melting temperature between matrix and the reinforced phase is small; and fiber distribution gradient is constructed to prepare a biodegradable self-reinforced biomimetic material with bamboo imitation structure, high strength and high toughness.

The invention provides a detecting method of high order modulated (multi-input multi-output) MIMO system in a mobile environment. The method mainly solves the problem that the current high order 4q-QAM modulated MIMO multiplex system has a high detection complexity. The detecting method comprises the following steps of: performing a region division for the constellation points of the 4q-QAM according to the stratified characteristic of the 4q-QAM; determining candidate regions based on the modulated sublayer data with greater weight coefficient; preferring the constellation points in the candidate regions according to a principle of minimum distance between the constellation points and corresponding received data; searching for preferred constellation points of each layer by using a spherical detection (SD) algorithm and determining transmitted data. Compared with a multi-state spherical detection (MSD) method, the detecting method has a lower complexity and a higher bit error rate performance; compared with the SD, the detecting method has a much lower complexity in a high signal to noise ratio (SNR) or a low SNR; therefore, the detecting method can be used in the design and realization of receiver in the high order modulated MIMO system in a mobile environment.

The invention provides a pseudocode-Doppler combined capturing method of a direct sequence spread spectrum MSK signal. The method comprises the following steps of converting the direct sequence spread spectrum MSK signal to an appropriate direct sequence spread spectrum BPSK signal through intermediate-frequency matching processing; performing Doppler compensation on sampling data of the appropriate direct sequence spread spectrum BPSK signal; capturing the code phase error, the Doppler channel and Doppler displacement value of the BPSK signal after Doppler compensation through a pseudocode parallel capturing method, and acquiring a Doppler frequency offset according to the Doppler channel and the pseudocode displacement value. The pseudocode-Doppler combined capturing method can realize capturing of the direct sequence spread spectrum MSK signal in a high dynamic condition and furthermore finishes combined estimation for the pseudocode phase and the Doppler frequency offset. On the condition of relatively low signal-to-noise ratio, not only is relatively low Doppler frequency offset estimation error realized, but also high pseudocode phase capturing performance is obtained, thereby ensuring relatively good coarse synchronization of a received signal before entering a signal tracking processing module.

The invention discloses a compressed sensing-based multi-period direct-spread MSK signal two-dimensional joint acquisition method. According to the method, A/D sampling is performed on received intermediate-frequency direct-spread signals; after passing through a receiving and converting filter, sampled signals are converted into approximate direct-spread BPSK signals; the approximate direct-spread BPSK signals are subjected to down-conversion and low-pass filtering, so that direct-spread DSSH complex baseband signals are obtained; a sample point sequence of M symbol periods is selected from the signals so as to be adopted as an observation sequence, and local pseudo-codes are adopted to construct a joint sparse matrix; and an orthogonal matching pursuit algorithm is used to reconstruct compressed sensing signals, so that pseudo-code phase difference and Doppler frequency offset can be captured. The method of the invention has the advantages of simultaneous completion of pseudo code phase and Doppler frequency offset capture, large search range, high estimation precision, small error, and the like. The method of the invention is a novel two-dimensional capture method, is suitable for a high-dynamic low-signal to noise ratio application environment and has a high practical value.

The invention discloses a data management method. The method includes the steps that a first mapping is built for metadata, the address of a first logic block is allocated, and the address of the first logic block is used as the first metadata; a second mapping is built for the first metadata, the address of a second logic block is allocated, the address of the second logic block is stored in a setting position, and the address of the second logic block is used as the second metadata; the second metadata is regarded as user data for processing. According to the method, the problem of complexity that two processes are used due to different treatment on the user data and the metadata by a system is solved. Moreover, multi-level mapping is introduced, so that the data searching efficiency is improved, and the data volume written into a memory when the system is out of power is reduced. The invention further discloses a data management device which has the above advantages.

The invention provides a service routing relay node. The interfaces of the same type of service providers capable of providing the same service are packaged into a service plug-in, and a corresponding relation between available services and northbound interfaces is registered in a service registry center. After a service request is received, the service plug-in is determined according to the routing strategy and the pre-stored corresponding relation, then the service provider is determined, and the service request is forwarded. The service routing relay node undertakes the routing selection strategy, while the service consumer does not need to select the target from a plurality of service providers, so that the complexity of the service consumer can be reduced.

The present invention discloses a gas sensor comprehensive tester and a measurement method thereof. The gas sensor comprehensive tester comprises a multi-channel digital display direct current stabilized voltage power supply, a digital display temperature controller, an adjustable sampling resistor, a data acquisition circuit, a data storage unit, a data display device and a USB interface. According to the present invention, the gas sensor comprehensive tester can completely meet various requirements during the testing of the gas sensor, wherein the requirements comprise: providing a direct current working power supply and a heating power supply for the sensor, measuring and controlling the working temperature of the sensor, measuring the characteristic data of the sensor, displaying and storing the tested data, and performing the on-line working with the computer, and the user can select the testing scheme according to the use conditions and the working way of the sensor based on the requirement so as to achieve the evaluation on the characteristic of the sensor; and the gas sensor comprehensive tester is suitable for the performance testing on the resistor type gas sensor, the MOS diode type gas sensor, the junction diode type gas sensor, the field effect transistor type gas sensor, the galvanic cell type gas sensor, the controlled potential electrolysis type gas sensor, the electric quantity type gas sensor and the ion electrode type gas sensor, and has advantages of gas sensor development cost reducing and research and development efficiency improving.

The invention discloses a composite clutch, comprising a main frictional disk (3) and the like. A guide column pin (4) is arranged between the main frictional disk (3) and an auxiliary frictional disk (6); a driven shaft (11) sequentially penetrates through a base (20), a plane bearing shifting fork body (7), the auxiliary frictional disk (6), a double-side shaft frictional disc (15) and the mainfrictional disk (3) from bottom to top, and the double-side shaft frictional disc (15) is in sliding connection with the driven shaft (11); the left side and the right side of the base (20) are respectively provided with a cam base (81) and a shifting fork fixing base (191), one end of a shifting fork (9) is rotationally connected with the shifting fork fixing base (191), and the other end of theshifting fork (9) is in contact with a cam (8) on the cam base (81); the shifting fork (9) is in sliding connection with the plane bearing shifting fork body (7); and an elastic contact block (66) abuts against the top surface of the plane bearing shifting fork body (7). The composite clutch can automatically align to be suitable for large-torque high-speed running.

The invention discloses a portable accurate grinding and sampling device for a concrete surface layer, and belongs to the field of concrete durability monitoring. A sampling mechanism is sequentiallyprovided with a grinding head and a drill bit from front to back, the grinding head and the drill bit are connected into an integrated structure, and the drill bit is connected with a motor rotating shaft through a drill bit mounting seat; a threaded cylinder of an accurate adjusting mechanism is arranged in the outer side of the drill bit mounting base, internal threads matching the threaded cylinder is arranged on the inner wall of a fixed ruler, and the fixed ruler and the threaded cylinder rotate relatively to adjust the relative depth of the grinding head embedded into a sampling layer; and the two ends of a sliding rail of a collecting mechanism are fixedly connected with the drill bit mounting base, and a powder collecting groove is movably arranged on the sliding rail in a sleevingmode to cover the grinding head. The problems that an existing concrete powder sampling device is inconvenient to carry, complex in sampling process operation, and incapable of accurately controllingsampling demand, dust pollution in the sampling process are solved, and the device of the invention is characterized by accurate sampling, simple operation and portability. the device can be used foroutdoor in-situ sampling as well as indoor sampling.

The invention relates to a cloud-computing-based smart recommendation method that is implemented on a Hadoop cloud computing platform based on collaborative filtering algorithm of items or articles. The method comprises the steps of S1, establishing a concurrent matrix of articles; S2, establishing a user's score matrix for the articles; S3, calculating recommendation results through the matrixes; S4, storing the recommendation results; S5, recommending the results. The invention also discloses a cloud-computing-based smart recommendation system. The Cloud-computing-based smart recommendation method and system have the advantages that the high complexity problem of an algorithm can be solved by using a cloud computing concurrent programming model, and complex operation is decomposed into simple task executions; additionally, by cloud computing, it is possible to provide a large-scale data storage system, and limits on hardware of a single computer are surpassed; the recommendation algorithm and the Hadoop cloud computing platform are integrated effectively, algorithm concurrence is achieved through the MapReduce distributed programming model, and operating efficiency of the algorithm is improved.

The utility model provides an open type and universalized design method of plane electromechanical system control and belongs to a computer automatic control category. The open type and universalized design method of the plane electromechanical system control is used in the aviation electronic technical field and is about a switch control system. Hardware is of a universal platform and software is divided into a plane loading portion and a ground portion. The plane loading portion is of a universal software module and a function of the plane loading portion is set by a ground control logic configuration file. The design mode is capable of being used for controlling various electromechanical devices in a plane such as an anti-skidding brake, a fuel oil system, an undercarriage system, a wing flap and air brake system and a power source power distribution system. A computer is adopted to accomplish autonomous control to an electromechanical system so that information sharing among each plane loading electromechanical sub system is achieved, the problem that each plane loading electromechanical sub system is dispersed, disordered and sundry is solved, working load of a pilot is reduced, maintainability is improved, survivability is enhanced and cost and weight are reduced.

The invention discloses a vehicle classification trajectory error correction method based on map matching. The method comprises the following steps: 1, preprocessing a vehicle trajectory; 2, dividing different track types according to track anomalies in a specific scene; 3, according to the road information obtained in the step 2 and the track sequence which is successfully identified, performing classification track error correction processing by using a specific track error correction method. According to the method, the problems of limitation of specific track types and complexity of whole-area map matching in the prior art are solved.

The invention relates to a facility for placing books, tea cups and other objects, and discloses a novel multifunctional table. The table comprises a tabletop panel and supporting feet, wherein the tabletop panel is provided with a plurality of holes; one side of the tabletop panel is provided with a rectangular groove; power sockets are arranged in the groove and channel ports communicated with the holes on the tabletop panel are formed in the groove; at least one supporting foot of the table is hollow and the lower part of the supporting foot is provided with a through hole through which a power line can pass; and the supporting foot, which is far away from the side of the power sockets is hollow, the tabletop panel jointed with the supporting foot is provided with a hole of which the size is the same as that of a hollow section in the supporting foot, and a rotatable cylindrical pen holder is arranged above the hole. According to the technical scheme of the invention, the problem that the objects on the tabletop panel are disordered when electrical appliances are used on the table is solved.

The invention discloses a distributed power supply grid-connection control system of a novel grid-connection control system for a small gas generator set. The distributed power supply grid-connection control system has the functions of automatic grid connection, automatic protection and islanding prevention and is simple in structure, accurate in control, reliable and durable.

The invention relates to a big data analysis-based concrete strength evolution prediction method in a marine environment, and comprises the following steps: (1) dividing 35 types of cement in different cement standards into five types of cement varieties by using a clustering analysis method, so that the problem that the cement varieties are complicated and numerous is effectively solved; (2) selecting mol/L as a unit for ion concentration values, and unifying ion concentrations in different experimental solutions and ion concentration values in a marine exposure environment; (3) determining that the wetting-drying cycle system of the tidal splash zone in the actual marine environment is greatly different from the wetting-drying cycle system of a laboratory. According to the invention, the method for fitting a tidal curve by using a cosine function is innovatively applied in the research, the tidal heights of different sea areas are recorded through an algorithm, and the cosine curve is fitted; and finally, the drying and wetting time is calculated, so the wetting and drying cycle system in the marine environment is obtained. After the data are processed, machine learning is carried out to predict the corrosion resistance of the concrete in the marine environment.

The invention provides a data query method and device, and the method comprises the steps: obtaining blood tumor data from the input data of a plurality of hospital databases or target objects, and storing the blood tumor data in a blood tumor database; receiving a query request generated by operating the query condition on the Web page by the target object; and calling an interactive interface between the Web page and the blood tumor database, obtaining a query result corresponding to the query request from the blood tumor database, and displaying the query result on the Web page. A blood tumor database is formed by a database of a hospital or input information of a target object, i.e., the information is uniformly stored in the blood tumor database, and a query result corresponding to aquery request is correspondingly displayed on a Web page, so the query of blood tumor data is accurately and quickly completed, and the problem of complex ground data search caused by lack of standards of patient information stored in different subjects in related technologies is solved.

The invention discloses an improved property information display platform, and relates to the technical field of information display devices. The improved property information display platform comprises a display board, and the rear side surface of the display board is fixedly connected with a fixed block. According to the improved property information display platform, a poster fixed to the frontside face of the display board can be replaced through a pull block, a first fixing shaft, a second fixing shaft, a spring and a clamping block, the poster replacing process is simple and rapid, andthe time needed for replacing the poster is shortened to a certain extent; through the arrangement of an electric push rod, a toothed plate, an end face gear, a rotating shaft, a first bevel gear, a second bevel gear, a first gear, a second gear, a first shaft, a second shaft, a chain wheel, a rotating disc, a supporting rod, a square block and an L-shaped connecting rod, the two fixing frames canbe automatically separated, and therefore posters pasted in the fixing frames can be conveniently replaced, and the problem that when people replace posters, operation is tedious and complex is solved.