242results about How to "Simple coding" patented technology

The invention discloses a wireless charging transmitter, a receiver, a charging device and a wireless charging method. The wireless charging transmitter comprises a first microcontroller, a drive circuit, a resonant transmitting circuit, a PPM (pulse position modulation) decoding circuit and a power circuit; the wireless charging receiver comprises a resonant receiving circuit, a full-bridge rectifier circuit, a DC-DC conversion circuit, a current sensor, a lithium battery, an analog sampling circuit, a second microcontroller and a PPM transmitting circuit; and the wireless charging device comprises the above wireless charging transmitter and the receiver. The principle of electromagnetic coupling is used by the invention to transmit electromagnetic energy; a primary coil and a secondary coil also serve as communication coils, and charging feedback data are transmitted in a PPM mode for intelligent control on the transmission power; the realization mode is simple, the transmission power is large, the power consumption is low, and the cost is low; and the transmitter, the receiver and the charging device can be widely applied to various digital products with power no more than 10W.

The invention provides a power transmission line gallop risk early-warning method based on Adaboost. The method comprises the following steps that internal reasons of gallop of power transmission lines are classified, and statistics is carried out on meteorological feature factors in historical gallop accidents of the power transmission lines according to the classification result; according to the information of a power transmission line to be predicted, the class, in the classification result of the internal reasons of gallop, corresponding to the power transmission line is selected, the meteorological feature factors under the conditions of the historical gallop accidents of the class are recorded to form a training sample set, a classifier is formed with an Adaboost ensemble learning algorithm, forecast data of the meteorological feature factors of the gallop of the power transmission line serve as input, and a gallop early-warning result of the power transmission line is obtained through the classifier; according to the early-warning result, the early-warning level of the gallop of the power transmission line is obtained through judgment. According to the power transmission line gallop risk early-warning method based on Adaboost, the internal reasons and the external reasons influencing the gallop of the power transmission line are comprehensively considered, the historical gallop information and the weather forecast information of the power transmission line are made full use of, and the method meets the actual conditions better; the algorithm in use is high in generalization ability, easy to encode and high in early-warning result accuracy.

Aiming to solve the problem of test case suite expansion in a software regression test, the invention discloses a technology for reducing test case suite. The technology is inspired by the particle swarm optimization (PSO) and utilizes 0-1 coding manner to indicate test case suite. Different particles represent different selective schemes of test case suite; the adaptive value of each particle adopts two adaptive values to evaluate, wherein, one is coverage degree of the test case suite to a test demand set, and the other is redundancy of the test case suite satisfying the test demand set. The renewal of the particle position utilizes all test cases to randomly generate the next individual position taking the coverage rate of the rest demand as a probability, so as to get the particles with maximum coverage rate and minimum redundancy, which is the optimized test case suite reduction scheme. Compared with the prior test case suite reduction technology, the invention has no relation with initial values and has the advantages of simple operation, high calculation speed and excellent performance.

An iris identifying-method based on wavelet transform zero cross presentation includes carrying out binary state treatment on original image based on certain threshold to raise rough positioning precision of pupil, making double-threshold treatment based on external edge rough positioning of iris and carrying out intermediate value filtering to pick up general part of iris effectively, making quick and accurate rough positioning, accurately positioning external edge of iris by utilizing rough positioning result and using wavelet filter to carry out iris coding to effectively pick up information.

The invention provides methods and apparatus for transmitting and receiving a source data block in a wireless communication system using hybrid automatic retransmission request protocol. According to the scheme provided by the invention, at transmitting side, the source data block or part of source data block that is not decoded correctly at receiving side is divided into a plurality of data segments, each the plurality of data segments may be paded with known data to expand the data segments to be a predetermined lengthen, the data segment is encoded with linear code to be a data packet including the data segment and a redundancy information segment or including only redundancy information, and after that the encoded data packets are transmitted. At the receiving side, when each of the received data packets includes a data segment and a redundancy information segment, decoding is performed directly based on the received data packet, decoding is performed based on the received redundancy information segment and an data segment and redundancy information segment extracted from buffered data packets with a first and second chance to restore the data segment that is not decoded correctly in previous decoding processing. With the additional decoding chance, the scheme provided by the invention can improve decoding probability and thus the transmission efficiency of the system.

The present invention enables a reduction in circuit scale.

In an image coding apparatus (100), as for DCT coefficients as simple coded data obtained by coding an input image (91) by simple processing, the input image (91) is coded by at least quantizing the input image (91) as an input image on the basis of selected quantization parameters (QPl) discretely selected from quantization parameters (QP) as quantization factors, thereby computing generated code sizes of the input image (91) upon coding. The image coding apparatus (100) corrects an error in the generated code sizes of the input image upon coding which occurs in accordance with the simple processing, thereby computing low-precision generated code sizes. The image coding apparatus (100) computes low-precision generated code sizes when the input image (91) is coded on the basis of quantization parameters (QP) other than the selected quantization parameters (QPl), by an interpolation process with respect to the low-precision generated code sizes when the input image (91) is coded on the basis of the selected quantization parameters (QPl).

The present invention discloses a disturbance-based cyclic redundancy check (CRC)-auxiliary medium-short code length Polar code effective-decoding method, falling within the technical field of error correction coding. The method of the present invention comprises: firstly, performing CRC coding on an information bit to be transmitted, and then coding a Polar code after the CRC coding. At a receiving end, if code words of an SC decoder cannot pass CRC, a disturbance operation is activated to make the SC decoder generate better code words. The disturbance operation refers to: adding a tiny independent noise to a channel output sequence for disturbance, and then performing decoding again by using the disturbed sequence. When the decoder generates code words capable of passing CRC or reaches a re-decoding count threshold, the method announces completion of decoding. A numerical simulation experiment shows that under the conditions of the same bit error rate and code error rate, compared with an SC decoding method, the decoding method provided in the present invention can obviously improve a bit signal to noise ratio. Moreover, along with the improvement of a channel environment, the decoding complexity of the method of the present invention is approximate to the complexity O (NlogN) of SC decoding.

The invention discloses a control and monitor method of a silicon controlled rectifier converter valve for extreme high voltage direct current power transmission. The control and monitor method of the silicon controlled rectifier converter valve for the extreme high voltage direct current power transmission includes: monitoring work status of the silicon controlled rectifier converter valve through a silicon controlled rectifier high potential electronic unit TEU; reporting the work status back to a valve base electronic equipment cabinet VBE through a high voltage optical fiber; for triggering a control signal, sending light trigger pulse signals through the valve base electronic equipment cabinet VBE so as to control the silicon controlled rectifier converter valve; for performing monitor protection, initiatively generating trigger protection through the silicon controlled rectifier high potential electronic unit TEU. Single pulses are adopted in the light trigger pulse signals, and coding standard design of all the pulses adopts the single pulse mode, and therefore pulse coding is simple, the problems that a silicon controlled rectifier is always in a conducting state due to recognition incorrectness of a pulse sequence formed by a plurality of continuous pulses, and then inverting failure, protection failure in a reverse recovery period and the like are caused by the silicon controlled rectifier are solved, and the control and monitor method of the silicon controlled rectifier converter valve for the extreme high voltage direct current power transmission is high in timeliness and reliability.

A method of generating structured irregular LDPC codes for a wireless network such as a wireless local area network (WLAN) system, allowing systematic generation of improved code ensembles using density evolution, and providing essentially the best tradeoff between decoding threshold and decoding complexity. Such an LDPC code has a higher diversity order for MIMO systems, with better built-in interleaving capability. Further, the code dimension can be tailored to 802.11n system parameters such as the number of sub-carriers and delay. The code also provides an improved girth control scheme, provides flexible length with different expanding factors, and supports simple encoding and shortening for multiple rates.

The invention belongs to the field of digital communication and digital storage, and especially relates to a recursive block Markov superimposed encoding method. The method is characterized by comprising the following steps: taking a short code of which the code length is n and the information bit length is k as a basic code, and encoding an information sequence FORMULA of which the length K is equal to kBL to a code word FORMULA of which the length N is equal to nB(L+T), wherein the encoding method includes the following steps: firstly, dividing the information sequence FORMULA of which the length K is equal to kBL into L equal-length blocks FORMULA, ensuring that the length of each block is kB, and aiming at t that is equal to -1, -2, ..., -(m-1), -m, initializing a sequence FORMULA of which the length is nB to an all-zero sequence; and then, at the time of t that is equal to 0, 1, ..., L-1, sending a sequence FORMULA of which the length is kB to a basic code encoder C for encoding to obtain an encoded sequence FORMULA of which the length is nB, and combining the fed-back FORMULA to calculate the t(th) sub-sequence FORMULA of the code word FORMULA. The recursive block Markov superimposed encoding method disclosed by the invention has the advantages of approaching the channel capacity, achieving simple encoding and flexible structure, and the like. Compared with a non-recursive block Markov superimposed encoding method, the method disclosed by the invention has lower decoding delay and decoding complexity, and has a very low error floor in decoding performance.

The invention discloses a non-steady flow simulating method for a pipe network system. The invention provides the non-steady flow simulating method which solves a non-steady flow by combining an obvious format and a hidden format and is suitable for complex pipe network systems. The method is based on a chasing method, three methods of a basic solution, a local iteration solution and a layered solution are provided for meeting the arraying modes of different pipe network systems and the dividing features of obvious and hidden format pipelines, and the hidden pipe network matrix equitation is solved by adopting a simple method. The non-steady flow simulating method for the pipe network system is suitable for the pressure pipeline systems and pressure-free drainage systems in large-scale river network non-steady flows in the transition process of a hydropower station as well as the non-steady flow simulation of an obvious full mixed flow system, and the non-steady flow simulating precision can be improved.

An authentication method authenticates between subscribers of a communications system using an asymmetric elliptic curve encryption algorithm. The method involves providing a first and at least one second subscriber having a first or second secret key known only to the respective subscriber and a public key; authenticating an inquiry transmitted by the first subscriber with respect to the validity of the first certificate contained therein and associated with the first subscriber; calculating the response of the second subscriber associated with the inquiry; randomized encryption of the calculated response and a second certificate associated with the second subscriber using the public key; decryption and authentication of the response transmitted by the second subscriber with respect to the validity of the second certificate contained therein.

The invention provides a three-dimensional wake numerical simulation method based on a 2D_k Jensen model, which can obtain a novel three-dimensional wake model. The method is characterized in that: step 1, calculating an inflow wind shear curve u0 (z) and the turbulence intensity distribution I0 (z) in the vertical direction; 2, calculating that expansion coefficients kx, z of the wake; 3, predicting that wake wind speed based on the original Jensen model to obtain the initial wake wind speed u* (x, z); 4, calculating that expansion radius rx, r of the wake; 5, utilizing that wake expansion radius rx, r obtained in the step 4, based on the cosine-type velocity distribution proposed by the 2D_kJensen model, three-dimensionally modifying the initial wake wind speed u* (x, z) obtained in thestep 3 to obtain the corrected wake wind speed distribution u (x, y, z). The three-dimensional wake model obtained by the invention inherits the advantages of the engineering model, and has good prediction accuracy for the wake velocity deficit in the direction of flow direction, the cross wind direction and the vertical direction, and can effectively reflect the asymmetric characteristics of thevelocity deficit in the vertical direction, and the calculation accuracy is even better than the numerical simulation result based on the CFD method.

The invention discloses a two-dimensional wake flow numerical simulation method. The method is characterized by comprising the steps that 1, wake flow expansion factors are calculated; 2, based on the step 1, the wake flow air speed under a Park model is calculated; 3, the initial wake flow radius under the Park model is corrected; 4, based on the step 2 and the step 3, the wake flow air speed under the corrected Park model is calculated; 5, based on the step 4, a new wake flow model is set up and named as a Park-Polynomial model; 6, the wake flow air speed under the Park-Polynomial model is calculated. By means of the two-dimensional wake flow numerical simulation method, the air speed of a wake flow zone can be well simulated, the precision is approximately consistent with testing results, the radial distribution better accords with a real flow field, and the advantages of a simple mode, easy encoding, efficient calculation and the like of an engineering model are achieved.

A device and a method for synchronizing entanglement sources with optical pump in a quantum communication network are disclosed. The device includes a pulsed optical source allowing emission of telecom wavelength optical clock pulses distributed in parallel to the entanglement sources to ensure synchronization of the entanglement sources; and for each of the entanglement sources, a frequency conversion device, allowing frequency conversion of the distributed telecom wavelength optical clock pulses to a wavelength adapted to optically pump the entanglement source. The method includes emitting and distributing in parallel, to the entanglement sources, telecom wavelength optical clock pulses; and locally, at each of the entanglement sources, frequency converting the telecom wavelength optical clock pulses to a wavelength adapted to optically pump the entanglement source.

The invention relates to a single-code-channel absolute-position encoding method comprising the step of setting an encoding pattern. The encoding pattern comprises a plurality of sections, each section comprises a section number and a position code, each section number comprises at least two identical first encoding bar codes or at least two second encoding bar codes, the encoding bar codes of section numbers of any two adjacent sections are different, any position code comprises at least two encoding bits, and each encoding bit comprises a first encoding bar code and a second encoding bar code. The single-code-channel absolute-position encoding method has the advantage of simple encoding. The invention also provides a decoding method corresponding to the single-code-channel absolute-position encoding method and a single-code-channel absolute-position measuring device adopting the single-code-channel absolute-position encoding method and decoding method.