30results about How to "Control computation" patented technology

The invention provides a line parameter detection and data non synchronous verification-based double-end ranging method. The method includes the following steps that: fault staring points corresponding to sampling data at two ends of a fault line are detected, the initial value of a non-synchronous angle between the fault staring points of the data at the two ends is calculated according to the electrical quantity of the fault line in normal operation, the initial value of a fault distance is calculated; and iteration is carried out to realize correction: the non-synchronous angle of the two ends is corrected according to the fault distance, online parameters of the line are calculated, ranging results are optimized, and when allowable error is satisfied, ranging is terminated. According to the method of the invention, the change of the parameters of the line and synchronization of the data at the two ends of the line are fully considered; a ranging result optimization method is utilized to well eliminate the influence of fault phasor measurement deviation on the ranging results, and therefore, fault location accuracy of the power transmission line can be effectively improved.

The invention provides an aero-engine high pressure turbine disc optimization design system based on particle swarm and method, and relates to a design technology field of the aero-engine. The system comprises a definition module of the optimization task of the aero-engine high pressure turbine disc, a primary particle swarm / file and a grid generation module, a global optimum selection module based on a gridding neighborhood, a particle update module, a file update module and a file size control module based on the gridding neighborhood, first the gridding jam index precision is improved by using active volume of file in gridding, then the particle jam distance is calculated in the finite region by using the gridding neighborhood message, the confidence level operand is provided for selecting the global optimum and deleting the file particle, the obtained ultimately file is the result of a plurality of the target optimization. During designing a plurality of the target optimization for the aero-engine high pressure turbine disc, starting from increasing precision of the global optimum in particle swarm optimization and of the non-particle deleting, the system and method provides the high-quality result of a plurality of the target optimization.

The invention relates to a method for positioning lane lines in traffic surveillance videos. For improving the prior art, an adjustable filter is adopted for edge detection, and thus, the edge information of lane lines is very clear; image threshold processing is carried out by using the global threshold method, which enables as many pixels of lane lines to be obtained as possible and reduces the interference of non-lane line pixels; at last, the detection of the positions of lane lines is realized accurately by using Hough Transform. The amount of computation is reduced and the complexity is lowered while the detection accuracy is enhanced, and thus, the method is applied more conveniently; the working efficiency of surveillance cameras for detecting traffic offence of line pressing of vehicles is enhanced effectively.

The present invention relates to a method for optimizing the particle number of a grid unit in the numerical simulation of a rarefied air flow, comprising: using DSMC to perform numerical simulation of the rarefied air flow, judging whether the number of simulated particles in any grid unit is within a set range, if the simulated If the number of particles is within the set range, there is no need to optimize the number of particles in the grid unit; if the number of simulated particles exceeds the upper limit of the set range, the particle fusion operation will be repeatedly performed according to the particle fusion criterion, so that each grid unit The number of simulated particles in the medium is within the set range; if the number of simulated particles is lower than the lower limit of the set range, the particle separation operation will be repeatedly performed according to the particle separation criterion, so that the number of simulated particles in each grid unit is within the set range. within range. Control the number of particles in each grid unit in the simulation domain, so that the number of simulated particles in each grid unit does not change greatly with the unit density and unit size, and balance the distribution of simulated particles on different grid units.

The invention discloses a displaying method and device of webpage pictures. The displaying method comprises the following steps: calling sub-pictures with the same characteristics; enabling the sub-pictures with the same characteristics to generate an integrated picture, and recording the position information of each sub-picture; sending the integrated picture and the position information to a terminal to enable the terminal to display each sub-picture at the corresponding position of a webpage according to the position information. Through the adoption of the technical scheme disclosed by the invention, the number of picture acquiring requests made by a webpage when the webpage is loaded for the first time can be reduced, the excessive consumed network resources are avoided, and the increment of the webpage loading speed is facilitated.

The invention discloses a coding circuit and a coding method applied to depth image intra-frame prediction in video coding and decoding, the circuit comprises an input data processing module, a coarsesearch module and a fine search module; the input data processing module is a channel for external reference data to be input into the module, and simply processes the data; the coarse search moduleis used for performing initial prediction for a depth image; and the fine search module is used for performing fine prediction again for a prediction result obtained by coarse search. With the circuitand the method provided by the invention, coding time can be reduced, operation cycle of the circuit is shortened, and consequently, performance of the whole video coding circuit is improved.

The present invention provides a method and device for issuing SDN mixed-mode flow tables based on network topology determination, including: monitoring whether the network topology changes within a preset period, and marking the network status according to the network topology change / not change; The network state adjusts the aging time of the flow table; when there is a flow table to be delivered, the static flow table mode or the dynamic flow table mode is selected to deliver the flow table according to the network state and the flow table aging time. The technical solution provided by the present invention realizes the static mode and the dynamic mode by setting the topology threshold module in the application system and classifying the priority of the business, using the northbound interface to call the controller topology information, and performing cyclic judgment and real-time delivery mode conversion The combined mixed-mode flow table distribution mechanism can effectively control the huge amount of software calculations caused by topology changes in large-scale SDN networks, and ensure the real-time performance and reliability of key services.

The invention discloses a C language-oriented source code clone detection method. The technical solution of the present invention is: adopting the context facial features grammar to define the grammar of C language, for realizing the parsing of the source program, generating the parsing tree of the source program, and then transforming the whole parsing tree to obtain the transformed parsing tree, and then Then restore the source code in text form. In addition, it also includes formatting and normalizing the obtained source code in text form. Perform clone detection on the obtained C function through the LCS algorithm to obtain the clone function detection result of the current function to be detected. During clone detection, only the code sequence length of the function falls within the length range of the clone function allowed by it as the current function to be detected The clone comparison object. The invention can realize the detection of Type3 clones, and control the calculation amount of detection to a certain extent.