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31results about How to "Reduce the number of selections" patented technology

Farmland wireless self-organizing network topology density correlation path selecting and optimizing method

The invention relates to a farmland wireless self-organizing network topology density correlation path selecting and optimizing method. The method includes the steps that firstly, node energy is calculated, voting is carried out, and cluster heads are determined; secondly, nodes within a preset threshold value are received by the cluster heads and added, and clustering operation is carried out; thirdly, nodes corresponding to which clustering operation is not completed become intra-cluster sub-nodes according to a pre-established method; fourthly, energy advantage nodes are selected from the intra-cluster sub-nodes to serve as fake cluster heads; fifthly, reverse scattering and networking are carried out according to the cluster heads and the fake cluster heads; sixthly, environment information collecting and reporting are carried out on all nodes through a networking route; seventhly, whether a cluster head arrives at an energy approximating target or not is judged; eighthly, if a cluster head arrives at the energy approximating target, the next round is marked to carry out cluster head election, collection of the current round ends, and otherwise collection of the round ends. By means of the method, clustering efficiency is improved, cluster head selection frequency is lowered, and overall network energy efficiency is improved.
Owner:北京市农林科学院信息技术研究中心

Virtual keyboard design scheme for inputting Chinese characters by brain waves

The invention relates to a virtual keyboard design scheme for inputting Chinese characters by brain waves. In the scheme, a virtual keyboard consisting of 42 buttons (six rows * seven columns) is constructed on a computer screen; the upper half part of each key of the keyboard is marked with a character representing a name of the key; the lower half part of each key is provided with a small window with a pixel of 30*30, which is used for carrying out visual stimulation; first to fourth rows of buttons are marked with initial consonants and vowels in a binary syllabification input method; first five number keys in a fifth row represent positions of candidate Chinese characters; the back and forth page turning of candidate characters/words is realized by key names of '->' and '-<'; and a sixth row of buttons has the main function of realizing selection of the first to fifth rows of buttons. In the using process of a user, the selection of each binary syllabification character needs to be completed by two steps, i.e. a first step of selecting a certain button on the sixth row so as to select the row in which the binary syllabification character is positioned and a second step of selecting the binary syllabification character in the selected row and repeating.
Owner:SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES

Method and device for selecting sampling clock

The invention discloses a method and device for selecting a sampling clock and relates to the technical field of communication. The method and device for selecting the sampling clock reduces the number of selecting times of the sampling clock, improves data sampling accuracy and further improves the working efficiency of a system. The method for selecting the sampling clock comprises the steps of acquiring all current clock configuration values which can be used for sampling data accurately, adding adjusting values to first weights corresponding to all the stored clock configuration values respectively, generating second weights corresponding to the clock configuration values respectively, replacing the first weights to the second weights and carrying out storage, judging whether all the second weights corresponding to the clock configuration value respectively are identical or not, if the fact that not all the second weights corresponding to the clock configuration values respectively are identical is confirmed, selecting a maximum value from the second weights corresponding to the clock configuration values respectively, and determining the clock configuration value corresponding to the selected maximum value to be the current sampling clock. The method and device for selecting the sampling clock is mainly applied to the selecting process of the sampling clock.
Owner:HUAWEI TECH CO LTD

Self-adaption input method based on chapter document

The invention provides a self-adaption input method based on a chapter document. Compared with a conventional input method, the self-adaption input method has the advantage that a current knowledge domain of a user is automatically sensed based on a user local document. The self-adaption input method comprises the following steps: firstly, automatically establishing a fundamental data set by a system, establishing corresponding domain data sets in different knowledge domains, perceiving corresponding domains according to character information input by a user and automatically switching to a current domain data set by the system, increasing a specific gravity of the domain data set through adjusting a weight relationship between the domain data sets and the fundamental data set, realizing automatic perception and parameter adjustment among different knowledge domains; with the increase of input information, continuously updating the corresponding field data sets, and extracting high-frequency word string dynamic populating fundamental data set information in the field data sets. According to the self-adaption input method, the information input by the user is more intelligently known, the selection times is reduced, the accuracy of first-time selection is increased, and the rate of coincident code is remarkably reduced.
Owner:NANJING UNIV

WLAN antenna combination method and system

The invention provides a WLAN antenna combination method and system. The method includes the steps that on-off states of all antennas are endowed with antenna weights respectively, antenna weight sequences are formed according to selection of the antennas, and multiple antenna weight sequences are selected to constitute a contemporary antenna weight set suitable for genetic algorithm operation; pairing, crossover and variation are carried out on the antenna weight sequences to obtain a variation antenna weight set; if a variation result does not meet the requirement, selection, crossover and variation steps continue to be conducted on the mutation result till the antenna weight sequence with an adaptive value f larger than a threshold set by the system is found. A genetic algorithm is used for searching for antenna combinations meeting communication quality requirements, each crossover and variation result adaptive value can be superior to the previous crossover and variation result adaptive value by effectively using criteria of survival of the fittest and crossover-and-variation in the genetic algorithm, the antenna combinations meeting the communication quality requirements can be found rapidly, the number of times of section of the antenna combinations is reduced, system expenses are lowered, and the communication effect is improved.
Owner:GCI SCI & TECH

Method to reduce common mode voltage of svpwm motor

The invention discloses a method for reducing the common-mode voltage of an SVPWM motor. S1: Obtain the voltage under the static voltage coordinate system from the previous stage control link; S2: Apply the voltage under the static voltage coordinate system in step S1 to select the action vector voltage; S3 : select the inverse vector voltage; S4: recalculate the inverse vector voltage time according to the inverse vector voltage determined in step S3; S5: determine the switching point of the sector vector. In the present invention, the voltage opposite to the action vector in SVPWM is used to replace the zero vector, which is used to suppress the excessively high common-mode voltage of SVPWM. When the SVPWM is driving the motor, the excessively large common-mode voltage exists to break down the insulating oil film and cause a short circuit between shafts, even burning The hidden danger of bad motors, rapid common-mode voltage changes will also produce strong electromagnetic interference, affecting the stable operation of other nearby devices, reducing the size of the common-mode voltage can effectively prevent the motor from being damaged when the common-mode voltage is too high. The damage of the motor can prolong the life of the motor, improve the operating efficiency of the motor, and reduce the failure rate.
Owner:ANHUI UNIV OF SCI & TECH

Optimal method for path selection based on topology density correlation in farmland wireless ad hoc network

The invention relates to a farmland wireless self-organizing network topology density correlation path selecting and optimizing method. The method includes the steps that firstly, node energy is calculated, voting is carried out, and cluster heads are determined; secondly, nodes within a preset threshold value are received by the cluster heads and added, and clustering operation is carried out; thirdly, nodes corresponding to which clustering operation is not completed become intra-cluster sub-nodes according to a pre-established method; fourthly, energy advantage nodes are selected from the intra-cluster sub-nodes to serve as fake cluster heads; fifthly, reverse scattering and networking are carried out according to the cluster heads and the fake cluster heads; sixthly, environment information collecting and reporting are carried out on all nodes through a networking route; seventhly, whether a cluster head arrives at an energy approximating target or not is judged; eighthly, if a cluster head arrives at the energy approximating target, the next round is marked to carry out cluster head election, collection of the current round ends, and otherwise collection of the round ends. By means of the method, clustering efficiency is improved, cluster head selection frequency is lowered, and overall network energy efficiency is improved.
Owner:北京市农林科学院信息技术研究中心

A sampling clock selection method and device

The invention discloses a method and device for selecting a sampling clock and relates to the technical field of communication. The method and device for selecting the sampling clock reduces the number of selecting times of the sampling clock, improves data sampling accuracy and further improves the working efficiency of a system. The method for selecting the sampling clock comprises the steps of acquiring all current clock configuration values which can be used for sampling data accurately, adding adjusting values to first weights corresponding to all the stored clock configuration values respectively, generating second weights corresponding to the clock configuration values respectively, replacing the first weights to the second weights and carrying out storage, judging whether all the second weights corresponding to the clock configuration value respectively are identical or not, if the fact that not all the second weights corresponding to the clock configuration values respectively are identical is confirmed, selecting a maximum value from the second weights corresponding to the clock configuration values respectively, and determining the clock configuration value corresponding to the selected maximum value to be the current sampling clock. The method and device for selecting the sampling clock is mainly applied to the selecting process of the sampling clock.
Owner:HUAWEI TECH CO LTD

Method for reducing common-mode voltage of SVPWM motor

The invention discloses a method for reducing the common-mode voltage of an SVPWM motor. The method comprises the steps of S1, obtaining the voltage under a static voltage coordinate system from a preceding-stage control link; S2, selecting an action vector voltage by applying the voltage under the static voltage coordinate system in the step S1; S3, selecting an inverse vector voltage; s4, recalculating the inverse vector voltage time according to the inverse vector voltage determined in the step S3; and S5, determining a switching point of the sector vector. According to the invention, the voltage opposite to the action vector in the SVPWM is adopted to replace a zero vector to inhibit the over-high common-mode voltage of the SVPWM, the over-high common-mode voltage of the SVPWM breaks through an insulating oil film to cause an inter-shaft short circuit when the SVPWM drives the motor to cause the hidden danger of burning out the motor, and the rapid common-mode voltage change can also generate stronger electromagnetic interference, which affects the stable operation of other nearby devices, reduces the common-mode voltage, so that the motor is effectively prevented from being damaged under the condition that the common-mode voltage is too high, and the effects of prolonging the service life of the motor, improving the operation efficiency of the motor and reducing the failure rate are achieved.
Owner:ANHUI UNIV OF SCI & TECH

An Adaptive Input Method Based on Text Documents

The invention provides a self-adaption input method based on a chapter document. Compared with a conventional input method, the self-adaption input method has the advantage that a current knowledge domain of a user is automatically sensed based on a user local document. The self-adaption input method comprises the following steps: firstly, automatically establishing a fundamental data set by a system, establishing corresponding domain data sets in different knowledge domains, perceiving corresponding domains according to character information input by a user and automatically switching to a current domain data set by the system, increasing a specific gravity of the domain data set through adjusting a weight relationship between the domain data sets and the fundamental data set, realizing automatic perception and parameter adjustment among different knowledge domains; with the increase of input information, continuously updating the corresponding field data sets, and extracting high-frequency word string dynamic populating fundamental data set information in the field data sets. According to the self-adaption input method, the information input by the user is more intelligently known, the selection times is reduced, the accuracy of first-time selection is increased, and the rate of coincident code is remarkably reduced.
Owner:NANJING UNIV

wlan antenna combination method and system

The invention provides a WLAN antenna combination method and system. The method includes the steps that on-off states of all antennas are endowed with antenna weights respectively, antenna weight sequences are formed according to selection of the antennas, and multiple antenna weight sequences are selected to constitute a contemporary antenna weight set suitable for genetic algorithm operation; pairing, crossover and variation are carried out on the antenna weight sequences to obtain a variation antenna weight set; if a variation result does not meet the requirement, selection, crossover and variation steps continue to be conducted on the mutation result till the antenna weight sequence with an adaptive value f larger than a threshold set by the system is found. A genetic algorithm is used for searching for antenna combinations meeting communication quality requirements, each crossover and variation result adaptive value can be superior to the previous crossover and variation result adaptive value by effectively using criteria of survival of the fittest and crossover-and-variation in the genetic algorithm, the antenna combinations meeting the communication quality requirements can be found rapidly, the number of times of section of the antenna combinations is reduced, system expenses are lowered, and the communication effect is improved.
Owner:GCI SCI & TECH

Smart television voice recognition method and system and readable storage medium

The invention provides a smart television voice recognition method and system and a storage medium, which are used for a smart television to recognize a dialect of a user, and the smart television receives a voice instruction of user interaction operation; the voiceprint recognition module determines the dialect type used by the user according to the voiceprint characteristics of the voice instruction of the user interaction operation; and the voice recognition module directly converts the voice instruction of the user interaction operation into characters according to the dialect type used bythe user so as to recognize the voice instruction of the user. According to the invention, a user operates the smart television through voice, the smart television does not need to select the dialecttype in the whole operation process of recognizing the voice of the user and performing recognition feedback, and for a family using the smart television and having multiple dialects, the dialect spoken by the user can be automatically recognized, and the voice instruction of the user interaction operation is directly recognized according to the voice recognition technology of the dialect, so that the selection frequency of the user for the dialect is greatly reduced, and the voice operation experience of the user is improved.
Owner:SHENZHEN TCL NEW-TECH CO LTD

Design method for pipeline passing through reverse fault with vibration peak value being more than 0.4g

The invention discloses a design method for a pipeline passing through a reverse fault with the vibration peak value being more than 0.4g. The design method comprises the steps that (1) the reverse fault and the pipeline are selected; (2) the fault dip angle alpha of the reverse fault is measured, and the surface vertical displacement D<CV> and the surface horizontal displacement D<CH> of the reverse fault are calculated respectively; (3) according to H, the intersection angle beta of the pipeline and the reverse fault is selected; (4) delta X is calculated by means of the equation that delta X=D<CH>*cos beta, and delta Y is calculated by means of the equation that delta Y=D<CH>*sin beta; (5) delta L<c> is calculated by means of the equation that ; (6) delta L is calculated by means of the equation that ; (7) whether delta L is less than or equal to delta L<c> is judged, it is determined that the designed pipeline is suitable for being installed in the revere fault if delta L is less than or equal to delta L<c>, and if delta L is greater than delta L<c>, the step (1), the step (5) and the step (6) are repeated until the delta L is less than or equal to delta L<c>. The design method is reasonable, achieves reliable pipeline design, and can guarantee that pipelines installed in reverse faults with different conditions all have good shock resistance.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
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