脉冲中立型时滞微分方程的振动性

证明了线性脉冲中立型时滞微分方程解的振动性等价于一类非脉冲中立型时滞微分方程解的振动性,应用这一结果建立了此类线性脉冲中立型微分方程解的振动性的显示判据。     

二阶时滞微分方程非振动性质在脉冲扰动下的不变性

本文建立了一类二阶脉冲时滞微分方程解的一个整体存在唯一性定理,并讨论了脉冲扰动对脉冲线性时滞微分程非振动性质的影响,获得了脉冲扰动对时滞微分方程非振动性质没有影响的一般性脉冲条件,推广了最近某些文献中的结论.     

脉冲中立型时滞微分方程的振动性

本文证明了线性脉冲中立型微分方程解的振动性等价于一类线性非脉冲中立型时滞微分方程解的振动性.应用这一结果,建立了线性脉冲中立型方程解振动性的显式判据.这些判别条件,显著地改进了已有的结果.     

脉冲中立型时滞微分方程的振动性

本文证明了线性脉冲中立型微分方程解的振动性等价于一类线性非脉冲中立型时滞微分方程解的振动性．应用这一结果,建立了线性脉冲中立型方程解振动性的显式判据．这些判别条件,显著地改进了已有的结果．     

脉冲中立型微分方程的振动性

本文通过揭示脉冲中立型微分方程和与之相联系的中立型微分方程之间解的关系, 得出了脉冲中立型微分方程解振动的几个充分条件．     

混合型脉冲微分方程的数值振动性分析

该文主要研究θ-方法的自变量分段连续混合型脉冲微分方程的数值解的振动性,获得了θ-方法保持自变量分段连续混合型脉冲微分方程振动与非振动的条件.最后给出了一些算例来验证所获理论成果的正确性.     

高阶非线性阻尼脉冲微分方程解的振动性

研究了一类高阶非线性阻尼脉冲微分方程振动状态,得到振动解的充分条件.     

高阶脉冲中立型偏泛函微分方程的强迫振动性

研究一类具高阶Laplace算子的高阶脉冲非线性中立型偏泛函微分方程的强迫振动性,利用Green公式和微分不等式方法将所讨论的脉冲中立型偏微分方程转化为脉冲中立型微分不等式的问题,获得了这类方程在三类不同边值条件下所有解强迫振动的若干充分条件.     

具有不依赖于状态脉冲的双曲型偏微分方程的振动准则

本文研究脉冲双曲型偏微分方程解的振动性质．得到了两类具有不依赖于状态脉冲的双曲边值问题的若干振动准则．     

脉冲时滞微分方程解的整体存在唯一性、振动性与非振动性

本文讨论脉冲时滞微分方程X’(t)=f(t,x(t-T_1(t)),…,x(t-T_n(t))),x(t_k)-x(t_k~-)=I_k(x(t_k~- )).获得了方程(E) 解的一个整体存在唯一性定理.当(E)是线性方程时,给出了由时滞微分方程解的振动性或非振动性刻划出相应的脉冲时滞微分方程的同样性质的一般性脉冲条件.     

OSCILLATION CRITERIA FOR DELAY DIFFERENTIAL EQUATIONS WITH IMPULSES

The present paper is devoted to the investigation of the oscillation of second order nonlinear delay differential equation (DDE) with impulses, sufficient conditions of oscillation for the solutions of DDE with impulses are obtained by using differential inequality. Some known results are improved and generalized.     

Variational methods to the fourth-order linear and nonlinear differential equations with non-instantaneous impulses

In this paper, the existence of solutions for the fourth-order linear and nonlinear differential equations with non-instantaneous impulses is studied by applying variational methods. The interesting point lies in that the variational structures corresponding to the fourth-order linear and nonlinear differential equations with non-instantaneous impulses are established for the first time.     

First- and second-order discontinuous functional differential equations with impulses at fixed moments

We give sufficient conditions for the existence of extremal solutions to discontinuous and functional differential equations with impulses. Our main results are new even for ordinary differential equations without impulses.     

Asymptotic behavior of solutions of second-order nonlinear impulsive differential equations

In this work, the asymptotic behavior of all solutions of second-order nonlinear ordinary differential equations with impulses is investigated. By impulsive differential inequality and Riccati transformation, sufficient conditions of asymptotic behavior of all solutions of second-order nonlinear ordinary differential equations with impulses are obtained. An example is also inserted to illustrate the impulsive effect.     

随机脉冲随机微分方程解的存在唯一性

提出了随机脉冲随机微分方程模型,其中所谓的随机脉冲是指脉冲幅度由随机变量序列驱动,并且脉冲发生的时间也是一个随机变量序列.因此,随机脉冲随机微分方程是对带跳的随机微分方程模型的推广.利用Gronwall不等式、Lipschtiz条件和随机分析技巧,得到了随机脉冲随机微分方程的解的存在唯一性条件.     

Impulsive stabilization of two kinds of second-order linear delay differential equations

In this paper, we consider the impulsive stabilization problems for two kinds of 2nd-order linear delay differential equations. By the method of Lyapunov functionals, criteria on the exponential stabilization by impulses and exponential stabilization by periodical impulses are gained. The control effects of impulses are especially stressed in the definitions and results. Some examples are also given to show the applications of our results.     

The dynamical behaviors of a nonautonomous Holling III predator-prey system with impulses

In this paper, we study a Holling III nonautonomous predator-prey system with impulses. Firstly, the dynamics of single-species nonautonomous Logistic system with impulses are discussed. Further, based on these results and by impulsive differential comparison theorem, the extinction and permanence of Holling III nonautonomous predator-prey system with impulses are obtained.     

具有可变脉冲点的脉冲微分方程的稳定性

该文考虑具有可变脉冲点的脉冲微分方程零解的稳定性。通过利用L yapunov函数以及Razumikhin技巧，可以得到关于具有可变脉冲点的脉冲微分方程零 解的一致稳定和一致渐近稳定的充分条件。     

Stability of nonlinear variable-time impulsive differential systems with delayed impulses

This paper investigates the stability of nonlinear variable-time impulsive differential systems with delayed impulses. By using the comparison principle, the Lyapunov method and inequality techniques, some sufficient conditions for quasi-uniformly asymptotic stability and quasi-exponential stability of a given solution of variable-time impulsive differential systems with delayed impulses are established.     

Oscillations of solutions of second order quasilinear differential equations with impulses

Some Kamenev-type oscillation criteria are obtained for a second order quasilinear damped differential equation with impulses. These criteria generalize and improve some well-known results for second order differential equations with /and without impulses. In addition, new oscillation criteria are also obtained to generalize and improve known results. Two examples of applications are given to illustrate the theory.