云南高校图书馆联盟文献共享服务平台- SPHERE

SPHERE: 作品数：617被引量：891H指数：12; 导出分析报告; 相关领域：理学更多>>; 相关作者：佘江峰毛翼飞宋桂娟谈心郭星辰更多>>; 相关机构：南京大学清华大学合肥工业大学中北大学更多>>; 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中国博士后科学基金国家教育部博士点基金更多>>

Effective potential and topological photon spheres:a novel approach to black hole parameter classification: 《Chinese Physics C》2025年第3期222-241,共20页Mohammad Ali S.Afshar Jafar Sadeghi; this paper,we base our analysis on the assumption that the existence of a photon sphere is an intrinsic characteristic of any ultra-compact gravitational structure with spherical symmetry.Utilizing the concept of a to...; 关键词：black hole photon sphere topological classification different parameters

两类具有两个零点的最优三元循环码: 《理论数学》2024年第10期198-204,共7页何潮曾学强; 本文从生成多项式的角度研究具有两个零点的三元循环码。运用有限域上的多变元、因式分解和低次不可约多项式解的结构等数学知识,得到了两类参数为[ 3m−1,3m−2m−1,4 ]的三元循环码,并关于Sphere-Packing界是紧的。This paper studies te...; 关键词：有限域循环码 Sphere-Packing界

Earth vitality:An integrated framework for tracking Earth sustainability: 《Geography and Sustainability》2024年第1期96-107,共12页Chuanglin Fang Zhitao Liu; supported by Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No.42121001);Major Program of National Natural Science Foundation of China(Grant No.41590840).; The Anthropocene era is characterized by the escalating impact of human activities on the environment,as well as the increasingly complex interactions among various components of the Earth system.These factors greatly...; 关键词：Multi-sphere Human-nature interaction SUSTAINABILITY Earth vitality framework

CLASSIFICATIONS OF DUPIN HYPERSURFACES IN LIE SPHERE GEOMETRY: 《Acta Mathematica Scientia》2024年第1期1-36,共36页Thomas E.CECIL; This is a survey of local and global classification results concerning Dupin hypersurfaces in S^(n)(or R^(n))that have been obtained in the context of Lie sphere geometry.The emphasis is on results that relate Dupin h...; 关键词：Dupin hypersurfaces isoparametric hypersurfaces Lie sphere geometry Lie sphere transformations Lie curvatures

Comparison Between Conformal Invariants for Conformally Compact Einstein Metrics:Some Counter-Example from the Metrics Developed by Pedersen: 《Journal of Mathematical Study》2023年第4期357-365,共9页Paul Fraux; The study of asymptotically hyperbolic Einstein metric is a rich field in theoretical physics and geometry.Pedersen introduced a family of examples for the dimension 4,and we look in this paper into the sign of some o...; 关键词：Conformally compact Einstein manifolds Berger sphere at infinity Renormalized volume Yamabe-Escobar constant

Error Estimate for Semi-implicit Method of Sphere-Constrained High-Index Saddle Dynamics被引量：1: 《Chinese Annals of Mathematics,Series B》2023年第5期765-780,共16页Lei ZHANG Pingwen ZHANG Xiangcheng ZHENG; supported by the National Natural Science Foundation of China(Nos.12225102,12050002,12288101,12301555);the National Key R&D Program of China(No.2021YFF1200500);the Taishan Scholars Program of Shandong Province。; The authors prove error estimates for the semi-implicit numerical scheme of sphere-constrained high-index saddle dynamics,which serves as a powerful instrument in finding saddle points and constructing the solution la...; 关键词：Saddle point Constrained saddle dynamics Solution landscape Semiimplicit Numerical analysis

Spherically Symmetric Problem of General Relativity for an Elastic Solid Sphere: 《Journal of Modern Physics》2023年第6期818-832,共15页Valery V. Vasiliev Leonid V. Fedorov; The paper is devoted to a spherically symmetric problem of General Relativity (GR) for an elastic solid sphere. Originally developed to describe gravitation in continuum (vacuum, gas, fluid and solid) GR does not prov...; 关键词：General Relativity Spherically Symmetric Problem Elastic Sphere

Dynamics and Control of Flexible Satellite Using Reaction Sphere Actuators: 《Space(Science & Technology)》2023年第1期528-538,共11页Javad Tayebi Ti Chen Hao Wang; supported by the National Natural Science Foundation of China(Grant Nos.12102174 and 12232011);the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures(Nanjing University of Aeronautics and astronautics)(Grant No.MCMS-I-0122K01).; This paper presents a disturbance observer-based linear quadratic Gaussian(LQG)control strategy to stabilize the flexible spacecraft considering the vibration suppression of flexible appendages using an orthogonal clu...; 关键词：STABILIZATION linearized CLUSTER

The 3-Sphere Instead of Hilbert Space: 《Journal of Applied Mathematics and Physics》2022年第9期2733-2742,共10页Alexander Soiguine; The Geometric Algebra formalism opens the door to developing a theory replacing conventional quantum mechanics. Generalizations, stemming from changing of complex numbers by geometrically feasible objects in three dim...; 关键词：Geometric Algebra STATES OBSERVABLES MEASUREMENTS

The divergence of nearby trajectories in soft-sphere DEM: 《Particuology》2022年第4期1-8,共8页William D.Fullmer Roberto Porcu Jordan Musser Ann S.Almgren Ishan Srivastava; The n-body instability is investigated with the soft-sphere discrete element method.The divergence of nearby trajectories is quantifed by the dynamical memory time.Using the inverse proportionality between the dynamic...; 关键词：Soft-sphere DEM CHAOS Lyapunov exponent

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