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110results about How to "Accurate and effective" patented technology

Method for producing disturbing torque to satellite using equivalent simulation of flexible accessory vibration by flywheel

InactiveCN101497374AAnalog EasySimulation is accurate and effectiveCosmonautic condition simulationsAir bearingFlywheel
The invention provides a method for generating interfering moment to a satellite by using flywheels to equivalently simulate the vibration of a flexible accessory, and relates to the method for generating the interfering moment to a satellite body by using the flywheels to equivalently simulate the vibration of the flexible accessory on a single-shaft air bearing table so as to solve the problems that the satellite simulation parameters are difficult to be equivalent to the real satellite parameters, and the environment has large difference from the environment of astrospace existing in the prior flexible satellite gesture semi-physical simulation method. The method utilizes the single-shaft air bearing table to simulate a spacecraft body, the control moment is provided by one flywheel arranged on the air bearing single-shaft table, and flexible interfering moment is equivalently provided by another two flywheels. When the single-shaft air bearing table simulates the spacecraft to run on a track and in particular the satellite gesture is driven, the flexible accessory has large interference to the satellite body. The interfering moment needs to be loaded on the single-shaft air bearing table during simulating. The method is applicable to simulating the situation that the spacecraft with the flexible accessory runs on the track and can reduce the technical difficulty and the cost of ground simulation validation of the spacecraft with the flexible accessory.
Owner:HARBIN INST OF TECH

Method and apparatus for indicating downlink channel measurement and method and apparatus performing downlink channel measurement in a relaying system

The present invention provides a method and apparatus for indicating downlink channel measurement and a method and apparatus for performing channel measurement. The method for indicating downlink channel measurement comprises: receiving information on interferes of a user equipment; generating, based on downlink subframe configuration information, a downlink channel measurement indication for each of possible combinations of the interferers, wherein the channel measurement indication is adapted to indicate a subframe group to be measured by a user equipment; and sending the downlink channel measurement indication to the user equipment so as to indicate the user equipment to perform corresponding downlink channel measurement. According to embodiments of the present invention, the subframe groups that are required to be measured by the user equipment may be determined with respect to possible combinations of interferers corresponding to different levels of interference. Thus, the user equipment may perform channel measurement for respective subframe groups. Therefore, the channel quality as determined in such way will be more accurate and reliable and better match the actual channel condition. Moreover, it also provides a possibility for the serving node to perform the scheduling more accurately and effectively.
Owner:NEC CORP

Distribution method for urban rail transit

The invention discloses a distribution method for the passenger flow of the urban rail transit. The distribution method comprises the steps: (1), setting up a revealed preference survey and a stated preference survey; (2), searching for the effective path from an origin station to a destination station; (3), calculating the service quality score of each path according to the survey data and historical data of urban rail operation; (4), setting up the utility function of going out of selection paths of passenger groups, and standardizing coefficients of all influence factors of the utility function of passenger path selection according to the survey data; (5), applying a mixed strategy game model solution Nash equilibrium solution method to calculate the optimal path selection probability distribution of each group; (6), calculating the passenger flow distribution proportion of each path according to the group path selection probability and the proportion of each group of a survey sample; and (7), obtaining the distribution proportion table of ticket business income of operators of all paths through calculation according to the passenger flow distribution proportion of each path between origins (O) and destinations (D) of a road network. The distribution method has the advantages that the subjective initiative of passengers is fully considered, the game model of the passenger groups is set, the path selection behavior of the passengers in the urban rail transit can be simulated well, and accurate and effective ticket business distribution proportion data can be provided for running enterprises.
Owner:SOUTHEAST UNIV

Endoscope image gastrointestinal hemorrhage detection method and system based on deep learning

The invention discloses an endoscope image gastrointestinal hemorrhage detection method and system based on deep learning. On the basis of a VGG network model, the relative structures of convolution layers and pooling layers in the VGG network model are reserved, the final full connection layer of the network is changed into the convolution layers. In addition, a BN layer is connected behind eachpooling layer, so that the defect that the size of an input image is fixed is overcome, model parameters are reduced, and the network performance and the generalization capability are better improved.An inter-level feature fusion module capable of fusing shallow features and deep features is constructed, feature information of each image is fully mined and utilized, and high detection precision is still kept for some images with low shooting quality or tiny bleeding areas. According to the invention, whether bleeding occurs or not can be automatically detected, and the position of a bleedingarea can be positioned, so that the detection result is clear at a glance, doctors can be effectively helped to make accurate judgment and effective decisions, the workload of the doctors is greatly reduced, and the working efficiency of the doctors is improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Detection algorithm for pore structure of shale gas reservoir

The invention discloses a detection algorithm for the pore structure of a shale gas reservoir. The detection algorithm comprises the step of carrying out specific surface analysis and detection to obtain partial data by adopting a nitrogen absorption method, and also comprises the following steps: (1) in the pressure reducing process after nitrogen is absorbed to maximum pressure, gradually and respectively converting staged desorbing amount of the nitrogen into the percent of the volume of a desorbed wetting phase at stages accounting for the volume of a rock-core pore and the percent of the volume of the desorbed nitrogen accounting for the total volume of the rock core; (2) calculating out the thickness of a wetting film in the process of staged desorption, namely, the throat radius of the process, by adopting a digital model for calculating the thickness of a water film according to the specific surface of nitrogen absorption and the density of the rock core; and (3) according to the relation of the capillary pressure theory, obtaining capillary pressure under the corresponding and relative pressure and a capillary pressure curve in the whole desorption process. The detection algorithm disclosed by the invention has the advantages that the characteristics of the pore structure of the shale gas reservoir and the characteristics of seepage and production of natural gas can be intuitively described, further the value of the shale gas reservoir is evaluated, the practical value is very high and the application prospect is very wide.
Owner:向丹

Bird flight track prediction method suitable for high-voltage tower

The invention discloses a bird flight track prediction method suitable for a high-voltage tower. The bird flight track prediction method comprises the following steps that step 1, a bird repelling simulation device is designed to be placed at a placement position of the high-voltage tower according to the characteristics of the high-voltage tower and a high-voltage tower pernicious bird nesting habits; and step two, the specific installation position of the bird repelling simulation device is determined; the detection angles of a plurality of Doppler radars on the bird repelling simulation device are designed; the bird repelling simulation device is installed on the middle upper part of the tower and is lower than a cross arm; and the four Doppler radars are adopted to detect four directions in the three-dimensional space respectively, and the detection angles of four Doppler radars are designed. According to the method, a simple and efficient track direction prediction method is designed specifically aiming at the characteristics of the architecture of the high-voltage tower and the high-voltage tower pernicious bird nesting habits, so that strong support is provided for repellingthe high-voltage tower pernicious birds, and accurate and effective dispelling of the pernicious birds is achieved.
Owner:GUANGDONG UNIV OF TECH
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