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POLAR: 作品数：1005被引量：992H指数：12; 导出分析报告; 相关作者：李榕张公正王俊罗禾佳陈莹更多>>; 相关机构：华为技术有限公司西安电子科技大学南京邮电大学中国科学院更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划国家高技术研究发展计划国家教育部博士点基金更多>>

Reward Function Design Method for Long Episode Pursuit Tasks Under Polar Coordinate in Multi-Agent Reinforcement Learning: 《Journal of Shanghai Jiaotong university(Science)》2024年第4期646-655,共10页DONG Yubo CUI Tao ZHOU Yufan SONG Xun ZHU Yue DONG Peng; National Natural Science Foundation of China(Nos.61803260,61673262 and 61175028)。; Multi-agent reinforcement learning has recently been applied to solve pursuit problems.However,it suffers from a large number of time steps per training episode,thus always struggling to converge effectively,resulting...; 关键词：multi-agent reinforcement learning deep reinforcement learning(DRL) long episode reward function

Multiframe track-before-detect method based on velocity filtering in mixed coordinates: 《Journal of Systems Engineering and Electronics》2022年第2期247-258,共12页WANG Liangliang ZHOU Gongjian; supported by the National Natural Science Foundation of China(61671181).; In this paper,a velocity filtering based track-before-detect algorithm in mixed coordinates is presented to address the problem of integration loss caused by inaccurate motion model in polar coordinate sensors.Since t...; 关键词：mixed coordinate approach velocity filtering multiframe integration weak target detection polar sensor coordinate

FOURTH-ORDER COMPACT SCHEMES FOR HELMHOLTZ EQUATIONS WITH PIECEWISE WAVE NUMBERS IN THE POLAR COORDINATES被引量：3: 《Journal of Computational Mathematics》2016年第5期499-510,共12页Xiaolu Su Xiufang Feng Zhilin Li; In this paper, fourth-order compact finite difference schemes are proposed for solving Helmholtz equation with piecewise wave numbers in polar coordinates with axis-symmetric and in some cases that the solution depend...; 关键词：Helmholtz equation Compact finite difference schemes Polar coordinate Theimmersed interface method High order method.

Adaptive preprocessing algorithms of corneal topography in polar coordinate system被引量：1: 《Journal of Central South University》2014年第12期4571-4576,共6页郭雁文; Project(20120321028-01)supported by Scientific and Technological Key Project of Shanxi Province,China;Project(20113101)supported by Postgraduate Innovative Key Project of Shanxi Province,China; New adaptive preprocessing algorithms based on the polar coordinate system were put forward to get high-precision corneal topography calculation results. Adaptive locating algorithms of concentric circle center were c...; 关键词：corneal topography Placido disk polar coordinate self-adoption preprocessing algorithms

Polar Coordinate Lattice Boltzmann Kinetic Modeling of Detonation Phenomena被引量：6: 《Communications in Theoretical Physics》2014年第11期737-748,共12页林传栋许爱国张广财李英俊; support of the Science Foundations of National Key Laboratory of Computational Physics,National Natural Science Foundation of China under Grant No.11202003;the opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) under Grant No.KFJJ14-1M.YL ;support of National Natural Science Foundation of China under Grant Nos.11074300 and 41472130;National Basic Research Program of China under Grant No.2013CBA01504; A novel polar coordinate lattice Boltzmann kinetic model for detonation phenomena is presented and applied to investigate typical implosion and explosion processes. In this model, the change of discrete distribution f...; 关键词：lattice BOLTZMANN method DETONATION wave NONEQUILIBRIUM behavior POLAR COORDINATE

Busbar Differential Relaying Method Based on Combined Amplitude and Phase Information of High Frequency Transient Currents: 《Energy and Power Engineering》2013年第4期1288-1292,共5页Xiao Wu Zhengyou He Xiaopeng Li; Busbar differential relaying method based on combined amplitude and phase information of high frequency transient currents is put forward in this paper for the speed and reliability problems of busbar protection based...; 关键词：BUSBAR Protection High Frequency Transient CURRENTS Complex Wavelet Analysis POLAR COORDINATE

High Efficiency Stereo Audio Compression Method Using Polar Coordinate Principle Component Analysis for Wireless Communications: 《China Communications》2013年第2期98-111,共14页董石胡瑞敏涂卫平王晓晨郑翔; supported by National Natural Science Foundation of China under Grants No. 61231015, No. 61102127 No. 61201340, No. 61201169;Major National Science and Technology Special Projects under Grant No. 2010ZX03004-003-03;Natural Science Foundation of Hubei Province under Grant No. 2011CDB451;Wuhan ChenGuang Science and Technology Plan under Grant No. 201150431104;the Fundamental Research Funds for the Central Universities; High efficiency audio compression is the basic technology in audio involved multimedia communications. Downmixing and parametric coding is efficient coding scheme with wide applications in some up-to-date audio codecs...; 关键词：PCA stereo audio audio com-pression

Power System State Estimation Solution With Zero Injection Constraints Using Modified Newton Method and Fast Decoupled Method in Polar Coordinate被引量：13: 《中国电机工程学报》2012年第22期I0015-I0015,11,共1页GUO Ye ZHANG Boming WU Wenchuag SUN Hongbin; 国家自然科学基金项目（51177080）; 国家杰出青年基金项目（51025725）; 如何保证零注入节点的注入功率在状态估计结果中严格为0是电力系统状态估计研究中的重要问题。在直角坐标下,由于零注入约束为线性约束,可使用修正牛顿法来有效地解决这一问题。因此,借鉴直角坐标下修正牛顿法的思路,提出了极坐标下的...; 关键词：状态估计模型电力系统解耦方法注射极坐标牛顿法基尔霍夫电流定律电压变压器

A Blind Watermarking Algorithm Resisting to Geometric Transforms Based on SVD被引量：2: 《Wuhan University Journal of Natural Sciences》2011年第6期487-492,共6页LI Xiuguang YANG Xiaoyuan; Supported by the National Natural Science Foundation of China (60842006); A new watermarking algorithm resisting to geometric transformation based on singular value decomposition （SVD） in logarithm polar coordinate is proposed. The log-polar mapping （LPM） is used to resist rotation and ...; 关键词：blind watermarking singular value decomposition（SVD） logarithm polar coordinate resist to geometric transform

A Polar Coordinate System Based Grid Algorithm for Star Identification: 《Journal of Software Engineering and Applications》2010年第1期34-38,共5页Hua ZHANG Hongshi SANG Xubang SHEN; In Cartesian coordinate systems, the angular separation-based star identification algorithms involve much trigon- ometric function computing. That delays the algorithm process. As in a polar coordinate system, the coo...; 关键词：STAR IDENTIFICATION GRID Algorithm POLAR COORDINATE System STAR SENSOR

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