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POINCARÉ: 作品数：452被引量：847H指数：12; 导出分析报告; 相关领域：理学更多>>; 相关作者：李万祥张建刚丁旺才谢建华张思进更多>>; 相关机构：兰州交通大学华东师范大学西南交通大学哈尔滨工业大学更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金甘肃省自然科学基金国家教育部博士点基金广东省自然科学基金更多>>

含减震器的振动冲击机械系统动力学研究: 《机械制造与自动化》2025年第1期20-23,共4页陈昕李万祥何进宝; 以含减震器的振动冲击系统为研究对象,建立振动模型。采用4阶Runge-Kutta法求解了运动方程,通过Matlab仿真得到系统的分岔图和Poincaré映射,研究系统在频率变化时由倍周期分岔和hopf分岔转迁为混沌运动的路径以及减震器参数对其系统动...; 关键词：含间隙系统 POINCARÉ映射振动冲击分岔混沌减振

High-dimensional Poincarébeams generated through cascaded metasurfaces for high-security optical encryption被引量：1: 《PhotoniX》2024年第1期499-511,共13页Jitao Ji Chen Chen Jiacheng Sun Xin Ye Zhizhang Wang Jian Li Junyi Wang Wange Song Chunyu Huang Kai Qiu Shining Zhu Tao Li; provided by National Key Research and Development Program of China(2022YFA1404301);National Natural Science Foundation of China(Nos.62325504,62305149,92250304,62288101);Dengfeng Project B of Nanjing University;the micro-fabrication center of the National Laboratory of Solid State Microstructures(NLSSM)for technique support。; Optical encryption plays an increasingly important role in the field of information security owing to its parallel processing capability and low power consumption.Employing the ultrathin metasurfaces in optical encryp...; 关键词：Poincare beams Cascaded metasurfaces Optical encryption

Manifestation of super chiral exceptional points in a plasmonic metasurface: 《Photonics Research》2024年第12期2863-2872,共10页HAOJIE LI GUOXIA YANG ANWEN JIANG MIN NI QIANWEN JIA FENGZHAO CAO JIAYI ZHANG BOKUN LYU DAHE LIU JINWEI SHI; National Natural Science Foundation of China(12174031,91950108).; The exceptional point(EP),a degenerate point within non-Hermitian parametric space,has attracted considerable attention,especially for its chiral responses.However,achieving ideal circular dichroism(CD)remains challen...; 关键词：POINCARÉ SURFACE CHIRAL

基于Poincaré映射的单相并网逆变器非线性动力学分析方法研究: 《电气自动化》2024年第5期76-78,共3页汤晨煜解大张延迟古丽扎提·海拉提; 近年来,并网逆变器作为电力系统与新能源的接口迅速发展,但目前线性化思想分析其稳定性问题的方法存在准确性不足的风险。为此,提出了一种基于Poincaré映射的单相并网逆变器非线性动力学分析方法。首先,考虑锁相环与电路的拓扑结构,建...; 关键词：POINCARÉ映射非线性并网逆变器锁相环

Weighted High Order Poincaré Inequalities on Stratified Lie Groups: 《数学进展》2024年第5期1071-1083,共13页HAN Yecong HUANG Tiren XU Chengdan ZHU Tingjing; In this paper,we focus on studying weighted Poincare inequalities on stratified Lie groups.We derive various Poincaréinequalities in the case 1; 关键词：A_(p)weight Poincaréinequality entire space stratified Lie group high order Sobolev space

Wolfgang Haken, 1928-2022: 《数学译林》2024年第3期246-264,共19页Patrick Callahan Ilya Kapovich Marc Lackenby Peter Shalen Robin Wilson 赵振江(译) 唐境(校); 引言1947年秋季,当19岁的Wolfgang Haken(黑肯)是基尔(Kiel)大学的本科生时,他听了Karl-Heinrich Weise的一门拓扑学导论课程.在这个课程中,Weise提到了拓扑学中一些著名的未解决问题,包括解结问题、四色问题和Poincaré(庞加莱)猜想.Ha...; 关键词：POINCARÉ 四色问题拓扑学庞加莱求解技巧职业生涯衍生问题本科生

高速列车齿轮传动系统断齿故障非线性动力学特性研究: 《时代汽车》2024年第18期151-153,共3页王永亮杨柳; 广西高校中青年教师科研基础能力提升项目(2021KY1388)。; 高速列车齿轮传动系统在实际的工作环境中可能出现轮齿磨损、折断等各种故障,这将造成齿轮传动稳定性下降,甚至造成齿轮传动失效,危及列车运行安全。文章以考虑断齿故障的高速列车齿轮传动系统为研究对象,通过数值模拟,揭示了断齿故障...; 关键词：断齿故障分岔齿轮系统 POINCARÉ映射

本刊英文版2024年67卷第9期(1957-2194)摘要: 《中国科学：数学》2024年第9期I0003-I0006,共4页; Center of the Yangian double in type A Fan Yang&Naihuan Jing Abstract We prove that the R-matrix and Drinfeld presentations of the Yangian double in type A are isomorphic.The central elements of the completed Yangian ...; 关键词：POINCARÉ ELEMENTS YANGIAN

Rank-generating functions and Poincaré polynomials of lattices in finite orthogonal space of even characteristic: 《Frontiers of Mathematics in China》2024年第4期181-189,共9页Feng XU Yanbing ZHAO Yuanji HUO; The geometry of classical groups over finite fields is widely used in many fields.In this paper,we study the rank-generating function,the characteristic polynomial,and the Poincarépolynomial of lattices generated by ...; 关键词：LATTICES orthogonal space of even characteristic rank-generating function characteristic polynomial Poincarépolynomial

Optical edge-to-screw singularity state conversions: 《Photonics Research》2024年第8期1689-1695,共7页HAOLIN LIN JUNHUI JIA GUOHUA LIU YANWEN HU ZHEN LI ZHENQIANG CHEN SHENHE FU; National Natural Science Foundation of China(12304358,12374306,62175091);Guangzhou Science and Technology Program(202201020061);Fundamental Research Funds for the Central Universities(21623331)。; Optical singularity states,which significantly affect propagation properties of light in free space or optical medium,can be geometrically classified into screw and edge types.These different types of singularity stat...; 关键词：INTERACTION POINCARÉ WAVE

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