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54results about How to "Effective optimization" patented technology

XPath query optimization method and system

ActiveCN102929996AEffective Structural Connection OrderOptimizing Query PlansSpecial data processing applicationsAlgorithmQuery optimization
The invention discloses an XPath query optimization method and system. The method comprises the following steps of: counting structural summary information of an extensive makeup language (XML) document through hierarchical encoding; counting value summary information by using a value-coding histogram and RPST, and performing an optimization algorithm for query optimization on an XPath expression by utilizing the statistical information, wherein the query optimization algorithm comprises the following steps of: 101-102, initializing a data structure and processing a single-step path; 103, judging whether a non-estimated path exists; 104, judging the path type; 105-109, estimating connection with lowest cost in all possible connection of a long path, and updating a cost matrix and a result set matrix by using corresponding data; 110-114, estimating an arrangement sequence with lowest path in a predicate path, updating a cost matrix and a result set matrix by using the corresponding data, and resorting the predicates according to an optimized sequence; and 115, reconstructing a query plan. According to the XPath query optimization method and system, the XPath query sentences can be effectively optimized, and the execution efficiency of the XPath query sentences is greatly improved.
Owner:SOUTH CHINA UNIV OF TECH

Wind farm multi-type wind driven generator arrangement optimization method based on genetic algorithm nested in particle swarm optimization

The invention discloses a wind farm multi-type wind driven generator arrangement optimization method based on a genetic algorithm nested in a particle swarm optimization. The genetic algorithm is used for choosing wind driven generator position. The particle swarm optimization is used for obtaining the optimal solution of the wind driven generator position type selection and the optimal solution is adopted as fitness of the wind driven generator position. The use of the generic algorithm guarantees that a feasible solution can be obtained for solving the nonlinear strong coupling optimization problem. The use of the particle swarm optimization not only guarantees that when various types of the wind driven generators have lots of parameters, and the type selection solution is obtained rapidly but also guarantees that the two algorithm are used in a nest mode, and when iteration times are too many, the calculation time is not likely to be too long. The wind driven generator position coordinate is directly encoded rather than choosing the checkerboards after the wind farm area is divided into checkerboards, and continuous search is capable of being conducted in the wind farm scope. The wind farm multi-type wind driven generator arrangement optimization method based on the genetic algorithm nested in the particle swarm optimization doesn't need to divide the wind farm into square grids, and compared with the prior art, the performance index is better, the position scheme is more accurate and the practicability is stronger.
Owner:ZHEJIANG UNIV

SAR image registration method based on salient division sub-region pair

The invention provides an SAR (Synthetic Aperture Radar) image registration method based on a salient division sub-region pair. The SAR image registration method comprises the following steps: 1) inputting SAR images of two time phases in the same region; 2) carrying out average filtering and histogram equalization on the two SAR images to suppress coherent spots; 3) carrying out salient region division based on frequency spectrum residual error on the two filtered and equalized images; 4) calculating a minimum euclidean distance between the saliently divided region of the two images by utilizing a histogram mode-sorted grayscale sequence; 5) calculating registration parameters for a matching region by utilizing an improved comprehensive learning particle swarm optimization algorithm; 6) converting the registration parameters into registration parameters of an original image pair by utilizing a coordinate relationship between a sub-region in which a pixel point is positioned and an original image to obtain final registration results. The SAR image registration method solves the registration problem under a situation of non-ideal region division consistence through an existing method and the problem of large registration calculation amount based on grayscale information, and is used for change detection, terrain classification, map correction, data fusion and the like.
Owner:XIDIAN UNIV

Method for implementing H.264 deblocking filter algorithm based on reconfigurable technique

ActiveCN102572430AMeet real-time decoding needsAlgorithm optimizationTelevision systemsDigital video signal modificationControl flowDeblocking filter
The invention discloses a method for implementing H.264 deblocking filter algorithm based on a reconfigurable technique, which comprises the following steps: for a deblocking filter algorithm in an H.264 decoding algorithm, carrying out hardware / software division and parallelism analysis on the deblocking filter algorithm so as to determine a data flow circuit and a control flow circuit implemented by the whole algorithm; then, optimizing the algorithm, and carrying out source code conversion on the algorithm, so that the algorithm is converted into a form which can be implemented by a reconfigurable array; and finally, converting the algorithm into a data flow graph form, and generating the configuration information of a RPU (reconfigurable processing unit), thereby completing mapping. By using the method disclosed by the invention, a blocking effect on images caused by transformation and quantization is removed, so that the block edge is smooth, thereby improving the visual effect; meanwhile, through applying a macro-block subjected to filtering to inter-frame prediction and motion compensation, smaller residual error data can be obtained, therefore, due to an advantages of being applicable to vast parallelism computing tasks, the method can be applied to coarsness-reconfigurable processor systems.
Owner:SOUTHEAST UNIV

Method for optimizing site selection and model selection of wind driven generators suitable for complex constraint condition

ActiveCN106886833ASearch detailed and continuousGuaranteed efficient selectivityForecastingWind drivenShortest distance
The invention discloses a method for optimizing the site selection and the model selection of wind driven generators suitable for a complex constraint condition. For an optimization problem of the site selection and the model selection of the wind driven generators, when nonlinear constraint conditions exist such as minimum annual power generation and shortest distance between wind driven generators, a genetic algorithm is used for site selection of the wind driven generators and a particle swarm optimization (PSO) algorithm is used for acquiring the optimal scheme of the model selection of the wind driven generators at such site. The method sets the objective function of the PSO algorithm, adds a penalty function in order to add a minimum power generation limiting condition thereto, and is in nested use with a genetic algorithm as a wind driven generator model selection optimization algorithm. In the genetic algorithm, the objective function of the genetic algorithm is set, and the penalty function is added to the shortest wind driven generator distance, that is, a safe distance limiting condition is added in order to achieve position model optimization of mixed installation of multiple models of wind driven generators in a wind power plant. The method can solve the optimization problem with the complex nonlinear constraint condition, achieves a better performance index, a more accurate model selection scheme, and better practicality.
Owner:ZHEJIANG UNIV

Method for recognizing partial discharge pattern of gas insulation combined electrical apparatus

The invention provides a method for recognizing a partial discharge pattern of a gas insulation combined electrical apparatus, which comprises the steps of building different types of partial discharge defect models, performing a simulated discharge experiment on each model, and acquiring waveform data by adopting an ultrahigh-frequency detection method; extracting a multi-dimensional feature vector representing waveform features by adopting an EEMD algorithm and an SVD algorithm; training acquired samples by adopting a support vector machine optimized through a particle swarm algorithm; and classifying measured partial discharge by using the trained support vector machine. According to the invention, pattern recognition is performed on partial discharge of the gas insulation combined electrical apparatus by adopting the support vector machine optimized by the particle swarm algorithm as a classifier, the support vector machine can acquire high classification accuracy under the condition that the number of training samples is small, two key parameters in the algorithm need to be set in advance, the two parameters can be effectively optimized by adopting the particle swarm algorithm, and the classification performance of the support vector machine is improved.
Owner:STATE GRID HUBEI ELECTRIC POWER COMPANY INFORMATION & TELECOMM

Method for constructing virtual test environment of environment control system software

InactiveCN108089975AMeet the requirements for completing configuration item testingFlexible arrangementSoftware testing/debuggingOperational systemConfiguration item
The invention discloses a method for constructing a virtual test environment of environment control system software and belongs to the technical field of airborne system software testing. The method comprises the steps that first, comprehensive airborne electronic system network configuration containing an environment control system is constructed, and an interface associated with the environmentcontrol system is constructed; second, a virtual target machine associated with the environment control system is constructed, an embedded operating system is formed, a simulation control and displaymodule is constructed according to the network configuration, and a peripheral device model base is constructed; third, fault models of all systems are established, and a dynamic link library is developed to form an interface associated with the environment control system and the embedded operating system; and last, an auxiliary test tool is integrated and used for performing black-box and white-box testing on the environment control system software. Through the method, in the virtual test environment or system, environment control system airborne software configuration item testing can be completed independently and sufficiently without the influence of a real running environment of a flight management system.
Owner:XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA

Method, device and system for evaluating functional modules in application program

InactiveCN109032916AReflect existing problemsThe evaluation results are accurateSoftware testing/debuggingEvaluation resultComputer module
The embodiment of the present application discloses a method, device and system for evaluating functional modules in application program. The system comprises an evaluation system client and an evaluation system server, the evaluation system client end is used for accessing the application client end to be evaluated. In the running process of the application client end, the data of at least part of the function modules started in the application client end on the evaluation dimension are collected and submitted to the evaluation system server end. The evaluation dimensions include: multiple evaluation dimensions determined from the perspective of the resource occupancy of the function module to the terminal equipment; the evaluation and evaluation system server is configured to summarize data collected by at least part of the functional modules of the same application program client in at least one terminal device, and determine the evaluation result of the functional modules. The evaluation and evaluation system server is configured to collect the data collected by at least part of the functional modules of the same application program client in at least one terminal device. The evaluation result can be made more accurate and the specific problems of the functional module can be more reflected.
Owner:ALIBABA GRP HLDG LTD

Continuous inverse class F power amplifier optimally using fragment discrete structure matching network optimization design

The invention discloses a continuous inverse class F power amplifier using fragment discrete structure matching network optimization design. The continuous inverse class F power amplifier comprises aninput matching network and an output matching network. The output matching network comprises a fragment discrete structure matching network and a regular structure fundamental wave matching network.The fragment discrete structure matching network is used for realizing a transmission zero point of a harmonic frequency band, can be discretized into rectangular sub-grids, 0 or 1 is used for describing each sub-grid, 1 represents that a grid region is made of a metal material, and 0 represents that metal is not attached to the grid region. The regular structure fundamental wave matching networkis used for realizing fundamental wave impedance matching in a wide frequency band. According to the continuous inverse class F power amplifier, the fragment discrete structure harmonic matching network of the power amplifier is optimized by using the multi-objective optimization algorithm, so that the problems of poor out-of-band rejection and non-ideal filtering characteristic of a traditional Chebyshev low-pass matching network are solved.
Owner:JIANGSU UNIV

Resource processing method and device, equipment and medium

PendingCN112734422AMeet individualized quota management needsImprove resource transfer experienceFinanceProtocol authorisationPaymentResource information
The invention discloses a resource processing method and device, equipment and a medium. The resource processing method comprises the steps of firstly, receiving a resource transfer request sent by a payee, wherein the resource transfer request comprises identity information of a payer and first resource transfer information to be paid by the payer; then, according to the identity information of the payer, determining target credit limit information corresponding to the target service identification information of the payee from multiple pieces of credit limit information of the payer, wherein the target credit limit is used for paying resource information corresponding to the target service identification information; and then, under the condition that the first resource value corresponding to the target credit limit information is greater than or equal to the second resource value corresponding to the first resource transfer information, deducting the target resource corresponding to the second resource value from the target credit limit information according to the first resource transfer information, and transferring the target resource to the payee. According to the embodiment of the invention, the resource transfer efficiency can be improved so as to improve the user payment experience.
Owner:CHINA UNIONPAY
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