中立多变时滞Volterra型随机动力系统的稳定性

探讨了一类非线性随机积分微分动力系统,并通过Banach不动点方法,给出了该系统零解均方渐近稳定的充要条件,形成了中立多变时滞Volterra型随机积分微分动力系统零解均方渐近稳定性定理。与前人的研究方法不同,该文根据多变时滞随机动力系统各时滞的特点,灵活构造算子,相比以往文献的方法更加灵活实用。文章的结论一定程度上改进和发展了相关研究论文的结果。另外,文章所得结论补充并推广了不动点方法在研究非线性中立多变时滞Volterra型随机积分微分动力系统零解稳定性方面的成果。     

一类具有多变时滞的非线性微分系统的周期解与稳定性

利用Chapman-Kolmogorov等式和基本解矩阵、状态转移矩阵的概念,并结合Floquet理论,研究一类具有多变时滞的非线性中立型微分系统.首先,通过适当的积分变换得到系统解一个新的表达式.然后,利用Krasnoselskii不动点定理,给出了系统周期解的存在性,并在一定条件下构造适当的压缩映射得到该系统周期解...     

一类高维非自治Volterra系统的周期解

本用矩阵测度和不动点定理对一类高维非自治Volterra系统的周期解进行了讨论,给出了存在唯一稳定周期的判断准则,避免了构造Lyapunov函数的困难,推广了[2]的工作。     

具有时滞的周期Lotka-Volterra型系统的全局渐近稳定性

考虑一般具有时间依赖时滞和连续分布时滞的Ｎ－种群周期Ｌｏｔｋａ－Ｖｏｌｔｅｒｒａ型系统。通过使用Ｌｉａｐｕｎｏｖ函数方法得到了关于正周期解的存在性和全局渐近稳定性的充分条件。这些条件改进和推广了最近被Ｗａｎｇ,Ｃｈｅｎ,Ｌｕ「２」和Ａｈｌｉｐ,Ｋｉｎｇ「４」得到的相应结果。     

变系数退化时滞微分系统解的稳定性

利用拉什密辛型定理讨论了变系数退化时滞微分系统解的稳定性，并给出了一个具体的判定定理．     

求时滞Volterra积分系统最优控制问题近似解的一个迭代算法

对一类典型的复杂系统—含多个非线性时滞的Volterra积分系统,给出其控制作用受限(硬约束)最优控制问题近似解的一个迭代算法,证明了该算法是well-defined的,并在一定的条件下证得了算法的收敛性.     

用向量V函数法研究变系数线性时滞微分大系统零解的稳定性

我们知道,对时滞大系统的稳定性研究,具有重大的理论价值和实际意义.从现有的文献来看,对这一问题的论述还远不够完善,主要困难是缺少研究的方法.在本文中,我们利用[10]中所建立的一个时滞微分不等式,并结合向量 V 函数法,研究两类变系数时滞微分大系统零解的稳定性,获得了一些简单的稳定性代数判据,推广和改进了[4—8]中的工作.     

一类时滞神经网络的周期解与稳定性

本文利用重合度理论中的延拓定理和一些分析技巧,讨论了一类时滞神经网络的周期解的存在性和全局渐近稳定性,获得了简便的判别条件.     

时滞切换中立系统的稳定性

针对一类带有分布时滞的切换中立控制系统,研究具渐近稳定性问题.利用Lyapunov函数法给出了在任意切换律条件下系统渐近稳定的充分条件.     

广义Volterra积分方程解的存在性

本文考虑Ｂａｎａｃｈ空间是形如ｘ（ｔ）＝ｕ（ｔ）＋∫_Gtf(t,s,x(s))ds的广义Ｖｏｌｔｅｒｒａ积分方程，利用Ｍ?ｎｃｈ不动点定理得到所论方程解的某些存在定理．     

Comparison Theorems for Controllability of Nonlinear Volterra Integrodifferential Systems

Sufficient conditions are derived for controllability of nonlinear Volterra integrodifferential systems. Here the controllability problem is transformed into a fixed point problem for some operator with the help of the notion of the comparison principle and the results are obtained by using the Schauder fixed point theorem.     

关于变时滞Lur’e间接控制系统的绝对稳定性

本文研究了变时滞Lur’e间接控制系统的绝对稳定性.利用M-矩阵性质及不等式技巧,通过引进可调参数,得到了变时滞Lur’e间接控制系统与时滞相关绝对稳定性新的充分条件.文中的结论推广和改进了已有文献中相应结果.     

一个减算子不动点定理及其对非线性Volterra型积分方程的应用

利用锥理论,在不需要上下解的条件下,获得一个新的减算子不动点定理,推广了最近文献的结果;并给出Banach空间中非线性Volterra型积分方程解的唯一性.     

变时滞BAM神经网络的全局指数稳定性

研究一类变时滞BAM神经网络平衡点的全局指数稳定性问题.在不要求激励函数全局Lipschitz条件下,通过构造合适的Lyapunov泛函,并结合Young不等式,得到了BAM神经网络模型在一定条件下全局指数稳定的一些充分条件,推广和改进了前人的相关结论,为综合设计指数稳定的时滞BAM神经网络提供了依据.     

Stability in Probability of Nonlinear Stochastic Volterra Difference Equations with Continuous Variable

Abstract

The general method of Lyapunov functionals construction, that was proposed by Kolmanovskii and Shaikhet and successfully used already for functional-differential equations, difference equations with discrete time, difference equations with continuous time, and is used here to investigate the stability in probability of nonlinear stochastic Volterra difference equations with continuous time. It is shown that the investigation of the stability in probability of nonlinear stochastic difference equation with order of nonlinearity more than one can be reduced to investigation of the asymptotic mean square stability of the linear part of this equation.     

具有多个变时滞的Lurie间接控制系统的绝对稳定性

本文利用M-矩阵性质,构造相应的Lyapunov函数,得到了具有多个变时 滞Lurie间接控制系统与时滞相关及与时滞无关绝对稳定的充分条件.文中的结论推 广和改进了已有文献中相应结果.     

Sufficiency-Type Stability and Stabilization Criteria for Linear Time-Invariant Systems with Constant Point Delays

We derive a set of criteria of asymptotic stability for linear and time-invariant systems with multirate point delays. The criteria are concerned with -stability local in the delays and -stability independent of the delays and are classified in several groups according to the technique dealt with. The techniques used include both Lyapunov's matrix inequalities and equalities and Gerschgorin's circle theorem. Lyapunov's inequalities are guaranteed if a set of matrices built from matrices of undelayed and delayed dynamics are stability matrices. Some extensions to robust stability of the above results are also discussed.     

Sufficiency-Type Stability and Stabilization Criteria for Linear Time-Invariant Systems with Constant Point Delays

A set of criteria of asymptotic stability for linear and time-invariant systems with constant point delays are derived. The criteria are concerned with -stability local in the delays and -stability independent of the delays, namely, stability with all the characteristic roots in Res–<0 for all delays in some defined real intervals including zero and stability with characteristic roots in Res<–<0 as 0⁺ for all possible values of the delays, respectively. The results are classified in several groups according to the technique dealt with. The used techniques include both Lyapunov's matrix inequalities and equalities and Gerschgorin's circle theorem. The Lyapunov's inequalities are guaranteed if a set of matrices, built from the matrices of undelayed and delayed dynamics, are stability matrices. Some extensions to robust stability of the above results are also discussed.