Averaging of Oscillation Systems with Delay and Integral Boundary Conditions

We prove the existence of a solution and obtain an estimate for the error of the averaging method for a multifrequency system with linearly transformed argument and integral boundary conditions.     

二阶脉冲时滞微分方程的振动性

本文研究了二阶脉冲时滞微分方程的振动性,分别运用完全平方技术和引入参数函数,得到了方程振动的两个充分准则.     

具脉冲和时滞影响的非线性抛物系统边值问题的振动结果

研究一类具非线性扩散项的脉冲时滞抛物偏微分系统解的振动性,借助Green公式、垂直相加法和脉冲时滞微分不等式,获得了该类系统在Robin边值条件下振动的充分性条件.所得结果充分反映了脉冲和时滞在系统振动中的影响作用.     

Erratum to: Relaxation Oscillations in a Logistic Equation with State-in-the-Past-Dependent Delay

Theoretical and Mathematical Physics - An Erratum to this paper has been published: https://doi.org/10.1134/S0040577921060052     

一类二阶非线性脉冲时滞微分方程的振动性

研究了一类二阶非线性脉冲时滞微分方程的振动性,分别运用引入参数函数和Lakshmikantham等人建立的脉冲微分不等式,得到了几个充分性判据,并改进了一些已知结果.     

一类非线性含时滞阻尼项双曲型方程解的振动性质

本文讨论一类含时滞阻尼项的非线性双曲型方程解的振动性质,所得判别振动的充分条件从理论上揭示了这类方程与普通双曲型方程质的差异,且应用十分便利;同时指明了振动由时滞量引起这一重要结论。     

脉冲中立型时滞抛物偏微分方程组的振动准则

考虑一类脉冲中立型时滞抛物偏微分方程组解的振动性,利用一阶脉冲时滞微分不等式获得了该类方程组在Robin,Dirichlet边值条件下所有解振动的若干充分条件.所得结果充分反映了脉冲和时滞在振动中的影响作用.     

非线性带强迫项双曲型时滞微分方程解的振动性质

本文研究一类带强迫项时滞双曲型方程解的振动性质．所得应用便利的判别振动的充分条件从理论上揭示了这类方程与普通双曲型方程的差异．     

Modal Control of Systems with Delay

Linear systems with control are considered. We study the modal control problem which consists of constructing a control for a given characteristic quasipolynomial of a closed system.     

Slow and Fast Oscillations in a Model of an Optoelectronic Oscillator with Delay

Doklady Mathematics - The local dynamics of a well-known model of an optoelectronic oscillator with delayed feedback is studied. In a neighborhood of zero equilibrium, normalized equations are...     

Asymptotic Stability of Large-amplitude Oscillations in Systems with Hysteresis

We study depending on a parameter periodic systems with the main linear part and a hysteresis nonlinearity; the linearized at infinity system has a one-dimensional subspace of periodic solutions for the critical parameter value. We prove theorems on a number, localization, and asymptotic stability of large-amplitude periodic solutions for the nonlinear system. Received March 1998     

Controllability of Nonsmooth Discrete Systems with Delay

This paper is concerned with a study of local controllability to discrete inclusions with delay. The sufficient conditions for relative and complete local controllability are obtained on the base of using Mordukhovich's nonsmooth constructions.     

有限时滞差分方程的稳定性

在本文中,作者建立了一些定理可以确保系统：x(n 1)=f(n,xn）（1）为一致稳定、渐近稳定或一致渐近稳定。在所获得的定理中,不要求△V为常负,这里△V（n,xn)≡V(n 1,x(n 1)-V(n,x(n))=V(n 1,f(n,xn)))-V(n,x(n)),特别地,在定理1中,△V甚至可以恒为正,这大大地改进了已有结果并且更加便于应用。     

退化时滞微分系统的可解性

本文中我们研究退化量滞微分系统E./x(t)=Ax(t) Bx(t-1) f(t).给出其标准型,研究这种类型退化时滞微分系统,并就其可解性的唯一性得到一些结果。     

Oscillations of the Solutions of Nonlinear Delay Hyperbolic Partial Differential Equations

In this paper, oscillatory properties of solutions of certain hyperbolic partial differential equations with multi-delays are investigated and a series of sufficient conditions for oscillations of the equations are established. The results fully indicate that the oscillations are caused by delays.     

Amplitude Bounds on Periodic and Aperiodic Oscillations: Second-order Systems

The global behaviour of the control systems described by thepair of differential equations x{dot} = –f(x)±g(y)+p(t), y{dot} = –f(x)±g(y)+p(t) has been investigated. Here f(x), g(y), h(x) and k(y) are polynomialsof odd degree with leading coefficients positive and p(t) andq(t) are bounded functions of time. Sufficient conditions havebeen found under which the trajectories of the above systemmay eventually be confined in a subset of (x, y, t)-space, thusgiving bounds on the amplitude of periodic as well as aperiodicoscillations. Further bounds on the amplitude of oscillationshave been investigated by finding regions in (x,y,t)-space fromwhich all trajectories eventually leave and into which no trajectoriesenter. Thus sufficient conditions have been derived for theexistence of an annulus in which oscillatory behaviour may beconfined.