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检索条件"主题词=form."
21 条 记 录,以下是1-10 订阅
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form.l Scattering Approach to High-Order Harmonic Generation
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Chinese Physics Letters 1999年 第7期16卷 502-504页
作者: 高靓辉 李晓峰 郭东升 傅盘铭 Laboratory of Optical Physics Institute of Physics&Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080 Department of Physics Southern University and A&M CollegeBaton RougeLouisiana 70813USA
By using the time-independent form.l scattering theoretical approach,we develop a nonperturbative quantum electrodynamics theory to describe high-order harmonic generation(HHG).This theory recovers the semi-classical ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Extension of Floquet's theory to nonlinear quasiperiodic differential equations
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Science China Mathematics 2005年 第12期48卷 1670-1682页
作者: WU Hao LI Weigu School of Mathematical Sciences Peking UniversityBeijing 100871China School of Mathematical SciencesPeking UniversityBeijing 100871China
In this paper, we consider the following autonomous system of differential equations:(x) = Ax + f(x, θ), (θ) = ω,where θ∈ Rm, ω = (ω1,...,ωm) ∈ Rm, x ∈ Rn, A ∈ Rn×n is a constant matrix and is hyperbolic, ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Regular n-simplices in R^n with vertices in Z^(n)
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Science China Mathematics 2004年 第1期47卷 104-113页
作者: XIA Jianguo & QIN HourongDepartment of Mathematics, Nanjing Normal University, Nanjing 210097, China (email: jgxia@***) Department of Mathematics, Nanjing University, Nanjing 210093, China Dept. of Math. Nanjing Normal Univ. Nanjing 210097 China Dept. of Math. Nanjing Univ. Nanjing 210093 China
In this paper the Ⅰ and Ⅱ regular n-simplices are introduced. We prove that the sufficient and necessary conditions for existence of an Ⅰ regular n-simplex in Rn are that if n is even then n= 4m(m + 1), and if n is... 详细信息
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Bifurcation phenomenon of a class of planar codimension 3 polycycle S^(2) with two saddles resonating
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Science China Mathematics 1997年 第12期40卷 1259-1271页
作者: 李宝毅 张芷芬 Department of Mathematics Tianjin Normal UniversityTianjin 300074China Institute of Mathematics Peking UniversityBeijing 100871China
By means of finitely-smooth normal form.theory and the method of infinitesimal analysis,it is proved that the cyclicity of a planar codimension 3 polycycle S(2) is three and the complete bifurcation diagram is provided.
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Synthesis and application on parallel image storage of bisfurylfulgide
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Science China Chemistry 2003年 第5期46卷 445-452页
作者: 闫起强 陈懿 姚保利 黎甜楷 雷铭 王英利 樊美公 Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Transient Technology Xi'an Institute of Optics and Precision Mechanic Chinese Academy of Sciences Xi'an 710068 China
A bisfurylfulgide, E,E-3,4-bis[1-(2,5-dimethyl-3-furyl)ethylidene]-3,4-dihydrofuran-2,5- dione, is synthesized by Stobbe condensation reaction. The molecular structure of target compound is confirmed by single crystal... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
Singularity conjecture and constructions of Jacobi form.
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Science China Mathematics 2002年 第7期45卷 827-835页
作者: 王巨平 Institute of Mathematics Fudan University Shanghai 200433 China
This paper verifies the singularity conjecture for Jacobi form. with higher degree in some typical cases, and gives constructions for the Jacobi cusp form. whose Fourier coefficients can be expressed by some kind of R... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
The two independent equations of circuits in integral form.of field theory:The fundamental law of circuits
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Science China(Physics,Mechanics & Astronomy) 2005年 第3期48卷 300-318页
作者: CHEN Shennian Department of Electronic Engineering Huaqiao University Quanzhou 362011 China
Circuit theory is an extremely important basic theory in electrical and electronic sciences and technologies. Over more than a century, researchers have come to the conclusion that a fundamental law of circuits needs ... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
A break of public key cryptosystem PKCY
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Science China(Technological Sciences) 1997年 第4期40卷 396-404页
作者: 徐茂智 王萼芳 Department of Mathematics Peking University Beijing 100871 China
The break of PKCY is reduced to a break of the related equi-effect cryptosystem, and a method for obtaining the equi-effect secret key by solving matrix equations is established. An algorithm for solving these equatio... 详细信息
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论
The Jordan normal form.of infinite matrices
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Chinese Science Bulletin 1996年 第23期41卷 1943-1946页
作者: 王世强 Department of Mathematics Beijing Normal University Beijing 100875 China
In this note we discuss the problem of transform.ng certain infinite matrices into theJordan normal form. over an uncountable algebraically closed field or a finite field.The mainmethod is compactness arguments throug... 详细信息
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On Browkin's conjecture about the elements of order five in K_2(Q)
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Science China Mathematics 2007年 第1期50卷 116-120页
作者: Ke-jian XU Department of Mathematics, Qingdao University, Qingdao 266071, China Department of Mathematics Qingdao University Qingdao China
Based on the work of Lenstra, a succinct proof of Browkin’s conjecture about the elements of order five in K2(Q) is given.
来源: 维普期刊数据库 维普期刊数据库 评论