中立型大系统的渐近稳定性

文[1]—[3]研究了中立型大系统的稳定性,获得了一些较好的结果。对相对中立型系统来讲,滞后线性系统的稳定性理论已比较完善。本文所提供的方法能较有效地克服判断中立型大系统稳定性的困难,所获得的结果不同于所有已知结果,并补充了这方面的研究。 1.线性系统我们考虑线性中立型大系统     

广义中立型系统的渐近稳定性及数值分析

１．引 言 考察如下广义中立型系统：其中,Ｌ,Ｍ,Ｎ ∈ Ｃｄ×ｄ为已知矩阵,　　　为已知向量值函数,　　　　　　　　　　当ｔ＞０时为未知函数,　　　　　　　　　　　　　　　　　　　　　　　　　为常数延时量． 对于　　　　　　　　　　　　　　　　　,１９６７年,Ｂｒａｙｔｏｎ［１］基于Ｌ,Ｍ,Ｎ为实对称矩阵,以及Ｉ± Ｎ和－Ｌ± Ｍ为正定矩阵时,讨论了（１）渐近稳定的充分条件;１９８４年,Ｊａｃｋｉｅｗｉｃｚ［２］基于 Ｌ,Ｍ,Ｎ为复系数时,研究了理论解的渐近稳定性及单步方法的数值稳定性;１９８８年,Ｂ…     

求解广义中立型系统的线性多步方法的NGP_G-稳定性

建立了广义中立型延迟系统理论解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是A_稳定的·     

中立型时滞微分方程的渐近稳定性

考虑具有正负系数的中立型时滞微分方程ｄｄ狋［狓（狋）－犘（狋）狓（狋－τ）］＋犙（狋）狓（狋－δ）－犚（狋）狓（狋－σ）＝０，　狋≥狋０， 其中Ｐ（ｔ）∈Ｃ（［ｔ０，∞），Ｒ），Ｑ（ｔ），Ｒ（ｔ）∈Ｃ（［ｔ０，∞），Ｒ＋ ），τ，δ，σ∈（０，∞）．获得了该方程零解 一致稳定及渐近稳定的充分条件，它推广并改进了现有文献中的结论．     

一类新的变时滞中立型神经网络的全局渐近稳定性条件

研究了一类激活函数的状态变量带有微分时滞的中立型神经网络的稳定性问题.通过构造李亚普诺夫函数,并利用LMI分析技巧,获得了该类中立型神经网络的全局渐近稳定性的充分条件.最后通过实际算例验证了所得结果的有效性.     

一类多时滞中立型广义系统的稳定性判据

研究了多时滞的中立型广义时滞系统时滞相关的渐近稳定性问题,利用Lyapunov-Krasovskii泛函,等价模型转换方法和自由由权矩阵的方法,给出了系统时滞相关渐近稳定的充分条件,所给的判据是线性矩阵不等式形式,可方便运用Matlab工具箱求解,最后用一实例验证了方法的有效性。     

一类二阶中立型差分方程正解的渐近稳定性

研究了下列二阶中立型差分方程Δ2[x(n)-px(n-τ)]+q(n)x(g(n))=0,n n0正解渐近趋向于零的充分条件.     

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。     

一类中立型泛函微分方程的全局渐近稳定性

利用不动点理论,给出下列非线性中立型泛函微分方程x′(t)=-a(t)x(t)+q(t,x(t-τ(t)),x′(t-τ(t)))零解全局渐近稳定的充分条件,推广并改进了已有文献中的相应结果.为了说明结果的可行性,给出了一个例子.     

非线性中立型时滞差分方程的渐近稳定性

本文建立了非线性中立型时滞差分方程△(xn-cxn-k) h(n,xn-l)=0零解稳定和渐近稳定的充分条件.所得定理改进了若干重要文献的有关结果.     

Asymptotic stability of linear multistep methods for nonlinear neutral delay differential equations

This paper is concerned with the numerical solution to initial value problems of nonlinear delay differential equations of neutral type. We use A-stable linear multistep methods to compute the numerical solution. The asymptotic stability of the A-stable linear multistep methods when applied to the nonlinear delay differential equations of neutral type is investigated, and it is shown that the A-stable linear multistep methods with linear interpolation are GAS-stable. We validate our conclusions by numerical experiments.     

Nonlinear stability of general linear methods for neutral delay differential equations

This paper is concerned with the numerical solution of neutral delay differential equations (NDDEs). We focus on the stability of general linear methods with piecewise linear interpolation. The new concepts of GS(p)$GS\left(p\right)$-stability, GAS(p)$GAS\left(p\right)$-stability and weak GAS(p)$GAS\left(p\right)$-stability are introduced. These stability properties for (k,p,0)$(k,p,0)$-algebraically stable general linear methods (GLMs) are further investigated. Some extant results are unified.     

Improved results on the stability analysis of linear neutral systems with delay decay approach

In this paper, the investigation of the asymptotical stability of linear neutral systems with time-varying delay has been presented. In order to achieve the desired results, the integral inequality approach was used to express relationships between terms of Newton-Leibniz formula technique and was constructed an appropriate Lyapunov-Krasovskii functional. By improving a delay decay approach, the stability criteria for the zero solution of system were formulated as linear matrix inequalities (LMIs) which can be easily solved. Two numerical examples have been given to show the applicability of established assumptions and the effectiveness of proposed method by MATLAB-Simulink.     

Asymptotic behavior and stability of second order neutral delay differential equations

We study the asymptotic behavior of a class of second order neutral delay differential equations by both a spectral projection method and an ordinary differential equation method approach. We discuss the relation of these two methods and illustrate some features using examples. Furthermore, a fixed point method is introduced as a third approach to study the asymptotic behavior. We conclude the paper with an application to a mechanical model of turning processes.     

G-Brown运动驱动的中立型随机时滞微分方程的指数稳定性

研究了一类G-Brown运动驱动的中立型随机时滞微分方程的指数稳定性.在G-框架意义下,运用合适的Lyapunov-Krasovskii泛函,中立型时滞微分方程理论以及随机分析技巧,证明了所研究方程平凡解的p-阶矩指数稳定性,得到了所研究方程平凡解是p-阶矩指数稳定的充分条件.最后通过例子说明所得的结果.     

General decay pathwise stability of neutral stochastic differential equations with unbounded delay

Without the linear growth condition, by the use of Lyapunov function, this paper establishes the existence-and-uniqueness theorem of global solutions to a class of neutral stochastic differential equations with unbounded delay, and examines the pathwise stability of this solution with general decay rate. As an application of our results, this paper also considers in detail a two-dimensional unbounded delay neutral stochastic differential equation with polynomial coefficients.     

Asymptotic stability of neutral differential systems with many delays

We are concerned with delay-independent asymptotic stability of linear system of neutral differential equations. We first establish a sufficient and necessary condition for the system to be delay-independently asymptotically stable, and then give some equivalent stability conditions. This paper improves many recent results on the asymptotic stability in the literature. One example is given to show that the sufficient and necessary condition is easy to verify.     

Uniform asymptotic stability for perturbed neutral delay differential equations

One-dimensional perturbed neutral delay differential equations of the form (x(t)−P(t,x(t−τ)))′=f(t,x_t)+g(t,x_t) are considered assuming that f satisfies −v(t)M(φ)?f(t,φ)?v(t)M(−φ), where M(φ)=max{0,max_s∈[−r,0]φ(s)}. A typical result is the following: if ‖g(t,φ)‖?w(t)‖φ‖ and , then the zero solution is uniformly asymptotically stable providing that the zero solution of the corresponding equation without perturbation (x(t)−P(t,x(t−τ)))′=f(t,x_t) is uniformly asymptotically stable. Some known results associated with this equation are extended and improved.     

Global stability for separable nonlinear delay differential systems

In this paper, we consider separable nonlinear delay differential systems and we establish conditions for global asymptotic stability of the zero solution. Applying these, we offer improved 3/2-type criteria for global asymptotic stability of nonautonomous Lotka-Volterra systems with delays.