检索结果-南通市图书馆

CONVERGENCE OF CHORIN-MARSDEN FOR MULA FOR THENAVIER-STOKES EQUATIONS ON CONVEX DOMAINS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 1999年第1期17卷 73-88页

作者： Lung-an Ying(Research institute for mathematical sciences, Kyoto university, Japan Department of Mathematics, Peking university, Beijing 100871, China) Peking Univ Dept Math Beijing 100871 Peoples R China Kyoto Univ Math Sci Res Inst Kyoto Japan

We prove the convergence of the Chorin-Marsden product formula for solving the initial-boundary value problems of the Navier-Stokes equations on convex domains. As a particular case we consider the case of the half pl... 详细信息

关键词： Navier Stokes equation vortex method fractional step method convergence

Rational points and zeta functions of some curves over finite fields

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2010年第11期53卷 2855-2863页

作者： WANG Long1, & LUO JinQuan2,3 1Department of mathematical sciences, Tsinghua university, Beijing 100084, China 2School of mathematical sciences, Yangzhou university, Yangzhou 225002, China 3Division of mathematical sciences, School of Physical and mathematical sciences, Nanyang Technology university, 637371, Singapore 1. Department of mathematical sciences Tsinghua University Beijing 100084 China2. School of Mathematical Sciences Yangzhou University Yangzhou 225002 China3. Division of Mathematical Sciences School of Physical and Mathematical Sciences Nanyang Technology University Singapore 637371 Singapore

In this paper we study the number of rational points on some curves over finite fields. Moreover, zeta functions of the associated function fields are evaluated explicitly.

关键词： exponential sum rational point rational place zeta function

在线全文

学校读者我要写书评

暂无评论

邓小平新时期军队建设思想的伟大历史贡献

党的文献 2024年第4期 81-86页

作者： Academy of Military sciences 中国人民解放军军事科学院

邓小平新时期军队建设思想,是新时期我们党领导筹划国防和军队现代化建设的根本依据和指导方针。邓小平科学判断战争与和平态势,实行国防和军队建设指导思想战略性转变,明确军队在国家大局中的定位与使命,探索和平时期军队建设新特点规... 详细信息

邓小平新时期军队建设思想,是新时期我们党领导筹划国防和军队现代化建设的根本依据和指导方针。邓小平科学判断战争与和平态势,实行国防和军队建设指导思想战略性转变,明确军队在国家大局中的定位与使命,探索和平时期军队建设新特点规律;调整积极防御的军事战略方针,将战略态势上的防御性同军事指导上的积极性统一起来,与时俱进创新军事战略指导;提出建设一支强大的现代化、正规化的革命军队总目标,指明人民军队建设发展的正确方向,为我军全面建设和长远发展提供行动纲领;坚定不移走中国特色精兵之路,科学处理军队建设中数量与质量的辩证关系,创新国防和军队建设发展模式。今天我们回顾和纪念邓小平的伟大军事贡献,关键是学习他在历史大转折时期领导筹划国防和军队现代化建设的新思路新方法,进而深入领会习近平主席在世界百年未有之大变局和中华民族伟大复兴战略全局交织激荡之际与时俱进带领全军进行的伟大理论创造和实践探索,坚定不移在习近平强军思想的科学指导下更加奋发有为地推进强军兴军事业。

关键词：邓小平新时期军队建设思想国防和军队现代化军事战略强军兴军

REGULARIZATION OF SINGULAR SYSTEMS BY OUTPUTFEEDBACK

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2000年第1期18卷 43-60页

作者： De-lin Chu Da-yong Cai(Department of mathematical sciences, Tsinghua university, Beijing 100084, China) 清华大学北京 100084

Presents a study which examined problem of regularization of a singular linear time-invariant system by derivative and proportional output feedback. Reduced form for the system that can be computed using orthogonal tr... 详细信息

关键词： regularization singular systems output feedback

Polylogarithms and multiple zeta values from free Rota-Baxter algebras

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2010年第9期53卷 2239-2258页

作者： GUO Li1,2 & ZHANG Bin3,1center of mathematical sciences,zhejiang university,Hangzhou 310027,China 2Department of Mathematics and Computer Science,Rutgers university,Newark,NJ 07102,USA 3Yangtze center of Mathematics,Sichuan university,Chengdu 610064,China 1. center of mathematical sciences Zhejiang University Hangzhou 310027 China2. Department of Mathematics and Computer Science Rutgers University Newark NJ 07102 USA3. Yangtze Center of Mathematics Sichuan University Chengdu 610064 China

We show that the shuffle algebras for polylogarithms and regularized MZVs in the sense of Ihara,Kaneko and Zagier are both free commutative nonunitary Rota-Baxter algebras with one *** apply these results to show that the full sets of shuffle relations of polylogarithms and regularized MZVs are derived by a single *** also take this approach to study the extended double shuffle relations of MZVs by comparing these shuffle relations with the quasi-shuffle relations of the regularized MZVs in our previous approach of MZVs by renormalization.

关键词： multiple zeta values polylogarithms Rota-Baxter algebras

Time-periodic solutions of the Einstein's field equations II:geometric singularities

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2010年第6期53卷 1507-1520页

作者： KONG DeXing1,LIU KeFeng2,& SHEN Ming3 1Department of Mathematics,zhejiang university,Hangzhou 310027,China 2Department of Mathematics,university of California at Los Angeles,CA 90095,USA 3center of mathematical sciences,zhejiang university,Hangzhou 310027,China 1. Department of Mathematics Zhejiang University Hangzhou 310027 China2. Department of Mathematics University of California at Los Angeles Los Angeles CA 90095 USA3. Center of Mathematical Sciences Zhejiang University Hangzhou 310027 China

In this paper,we construct several kinds of new time-periodic solutions of the vacuum Einstein's field equations whose Riemann curvature tensors vanish,keep finite or take the infinity at some points in these space-times,*** singularities of these new time-periodic solutions are investigated and some new physical phenomena are discovered.

关键词： Einstein’s field equations time-periodic solution Riemann curvature tensor singularity event horizon

GLOBAL WELLPOSEDNESS OF MAGNETOHYDRODYNAMICS SYSTEM WITH TEMPERATURE-DEPENDENT VISCOSITY

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2018年第3期38卷 898-914页

作者： Shibin SU Xiaokui ZHAO School of mathematical sciences Xiamen university School of mathematical sciences Xiamen University

The initial boundary value problem of the one-dimensional magneto-hydrodynamics system, when the viscosity, thermal conductivity, and magnetic diffusion coefficients are general smooth functions of temperature, is considered in this article. A unique global classical solution is shown to exist uniquely and converge to the constant state as the time tends to infinity under certain assumptions on the initial data and the adiabatic exponent γ. The initial data can be large if γ is sufficiently close to 1.

关键词： MHD system global well-posedness temperature-dependent viscosity

在线全文

学校读者我要写书评

暂无评论

收录证书

贵州民族研究 2024年第4期 2-2页

作者： center for Chinese Social sciences Research Assessment 南京大学中国社会科学研究评价中心

关键词：

A MODIFIED LIKELIHOOD RATIO TEST FOR HOMOGENEITY IN BIVARIATE NORMAL MIXTURES OF TWO SAMPLES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2009年第3期22卷 460-468页

作者： Qingzhu LEI·Yongsong QINSchool of mathematical sciences,Guangxi Normal university,Guilin 541004,China. School of mathematical sciences Guangxi Normal University Guilin 541004 China

This paper investigates the asymptotic properties of a modified likelihood ratio statistic for testing homogeneity in bivariate normal mixture models of two samples. The asymptotic null distribution of the modified li... 详细信息

关键词： Asymptotic distribution mixture model likelihood ratio test.