线性算子方程广义解的存在性

本文中我们研究并得到了线性算子方程的Moore-Penrose广义解的稳定性性质。     

一类广义Lienard系统全局渐近稳定性

作者利用Ｆｉｌｉｐｐｏｖ变换，给出判定广义Ｌｉｅｎａｒｄ系统（Ｅ）：ｘ＝Φ（ｙ），ｙ＝－ｆ（ｘ）Φ（ｙ）－ｇ（ｘ）的零解为全局渐近稳定的充要条件。     

广义泛函微分方程解的稳定性

本文首先给出广义泛函微分方程解的稳定性的概念,同时建立了有关稳定与不稳定的二个判据,然后作为例子,讨论二阶线性常系数广义微分差分程,得到了这类系统有关稳定与不稳定的若干结果,并发现了一些关于稳定性的分支或类似于分支的现象。     

广义Lienard系统周期解的不存在性

本文建立了广义Ｌｉｅｎａｒｄ系统不存在周期解的若干充分条件。     

某类系统广义指数型E稳定性(英文)

研究某类系统广义指数型 E稳定性 ,推广了文献 [1 ],[2 ]的某些结果 .     

线性广义时滞系统的H∞输出反馈控制器

本文首先给出了广义时滞系统稳定的一个充分条件，接着讨论了线性广义时滞系统的H∞输出反馈控制，给出了控制器存在的充分条件，同时利用线性矩阵不等式(LMI)的方法，给出控制器的设计，最后举例说明本文方法的可行性．     

求解广义中立型系统的线性多步方法的NGPG—稳定性

建立了广义中立型延迟系统理论渐近稳定的充分条件,分析了用线性多步方法求解广义中立型延迟系统数值解的稳定性,在一定的Lagrange插值条件下,证明了数值求解广义中立型系统的线性多步方法NGPG－稳定的充分必要条件是线性多步方法的A－稳定的。     

一类广义系统的渐近稳定性

Abstract. This paper is mainly used to determine the asymptotic stability of a class of nonlineargeneralized systems through its slow subsystems under the assumption of regularity. One exam-ple is given.     

一阶广义分布参数系统的指数稳定性

利用退化半群的方法讨论了Hilbert空间中一阶广义分布参数系统的指数稳定性,并给出了判断指数稳定性的充要条件.     

矩阵系统的稳定与条件稳定

一个矩阵对应一种状态变换 .一系列的矩阵构成矩阵序列系统 .任一微小的扰动都会破坏伪逆的精确性 ,即状态的最后结果 .本文证明 :若矩阵系统是广义各态历经的 ,则系统是稳定的 ;若矩阵系统是普真的 ,则系统是条件稳定的 .     

The Stability of Generalized Solution of Integral Equation

When we seek the generalized solution ofthe second knid Fredholm integral equation,the integral domain is always perturbed.Is the generalized solution of the second kindFredholm integral equation stable,when the integral domain is perturbed?Before an-swering this question let us look at the following example.　 Example1　Consider the integral equationψ(x) -∫baex- yψ(y) dy =f(x) ,　　 x∈ [a,b] . (1 )Obviously,the solutionψ(x) of the equation(1 ) must satisfy thatψ(x) =f(x) + cex, (2 )wh…     

Stability of Solutions of a Quasilinear Index-2 Tractable Differential Algebraic Equation by the Lyapunov Second Method

The Lyapunov second method is an important tool in the qualitative theory of ordinary differential equations. In this paper, we consider the behavior of solutions of quasilinear index-2 tractable differential algebraic equations. Using the Lyapunov second method, we prove sufficient conditions for the stability of zero solution of such equations.__________Published in Ukrains’kyi Matematychnyi Zhurnal, Vol. 56, No. 10, pp. 1321 – 1334, October, 2004.     

概自守系统与回复系统的零解稳定性

方程x′=f(t,x)零解渐近稳定的经典判据是存在定正函数V ,而dV/dt定负 .前人已证当f(t,x)是概周期函数时dV/dt定负这一条件可减弱为dV/dt小于或等于 0 .本文将证明该结论对f(t,x)是概自守函数和回复函数时也成立 .     

Stability of Generalized Transition Fronts

We study the qualitative properties of the generalized transition fronts for the reaction–diffusion equations with the spatially inhomogeneous nonlinearity of the ignition type. We show that transition fronts are unique up to translation in time and are globally exponentially stable for the solutions of the Cauchy problem. The results hold for reaction rates that have arbitrary spatial variations provided that the rate is uniformly positive and bounded from above.     

Stability of g-frames

g-Frames are natural generalizations of frames which cover many other recent generalizations of frames, e.g., bounded quasi-projectors, frames of subspaces, outer frames, oblique frames, pseudo-frames and a class of time-frequency localization operators. Moreover, it is known that g-frames are equivalent to stable space splittings. In this paper, we study the stability of g-frames. We first present some properties for g-Bessel sequences. Then we prove that g-frames are stable under small perturbations. We also study the stability of dual g-frames.     

Ranks of Solutions of the Matrix Equation AXB = C

The purpose of this article is to solve two problems related to solutions of a consistent complex matrix equation AXB = C : (I) the maximal and minimal ranks of solution to AXB = C , and (II) the maximal and minimal ranks of two real matrices X₀ and X₁ in solution X = X₀ + iX₁ to AXB = C . As applications, the maximal and minimal ranks of two real matrices C and D in generalized inverse (A + iB)^- = C + iD of a complex matrix A + iB are also examined.     

一类非线性发展方程整体弱解的存在性和稳定性

该文考虑一类新的非线性方程(｜ut｜r-2ut)t-Δutt-Δu-ρ(t)Δut=f(u) 的初边值问题，利用小扰动法证明了整体弱解的 存在性，借用位势井的概念得到了解的稳定性.〖HT5”H〗关键词:〖HT5”SS〗非线性发展方程;初边值问题;整体弱解;稳定性.     

Ranks of Solutions of the Matrix Equation AXB = C

The purpose of this article is to solve two problems related to solutions of a consistent complex matrix equation AXB = C : (I) the maximal and minimal ranks of solution to AXB = C , and (II) the maximal and minimal ranks of two real matrices X ₀ and X ₁ in solution X = X ₀ + iX ₁ to AXB = C . As applications, the maximal and minimal ranks of two real matrices C and D in generalized inverse (A + iB)^- = C + iD of a complex matrix A + iB are also examined.     

“齐王赛马＂的Nash谈判解

“齐王赛马”是一个典型的对策论例子,本文运用对策论相关知识,求出了“齐王赛马”的Nash谈判解．同时得出结论：齐王和田忌的期望收益正好与问题的Nash谈判解一致．