共查询到20条相似文献,搜索用时 15 毫秒
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冯春华 《Annals of Differential Equations》2004,20(1):30-36
By means of exponential dichotomy, this paper investigates the existence of almost periodic solutions of some delay differential equations. 相似文献
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Ni Hua 《Annals of Differential Equations》2007,23(3):312-318
In this paper,by using successive approximation method and fixed-point theorem,we discuss a class of infinite delay integral equation and obtain some sufficient conditions which guarantee the existence and uniqueness of the peri- odic and almost periodic solutions of the system. 相似文献
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1Introduction:Recellt,lyIt.SchlniltandJa,nJ(lsit.Ward,JR.[l]developedamclfllo(1forestablishillgtheexistellceofalmostperiodicsolutionstonolllillcal'secorl'1order相似文献
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A new fixed point theorem is presented and sufficient conditions are obtained for the existence, uniqueness and global attractivity of a positive almost periodic solution to a delayed differential equation with almost periodic factors. 相似文献
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1IntroductionConsiderthel'Ollowingdifferentialequationdx~~A(.t)x g(t,x),(l)dt.wherexeR",t6R,A(t)=(a,,(t)),,..istillnxncontinlloust'llllctiollmatrixinR,g(t,x)isanat-dimensionalcolltinuousfunctionvectorinRxR".Thepaper[l,21dealedwil;htheproblemontheexistence… 相似文献
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By means of the continuation theorem of the coincidence degree theory and analysis techniques,sufficient conditions for the existence of periodic solutions to a kind of third-order neutral delay functional differential equation with deviating arguments are obtained. 相似文献
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具无限时滞的非线性积分微分方程的周期解 总被引:11,自引:0,他引:11
本文考虑具无限时滞非线性积分微分方程和其中t∈R,T≥0是常数,x∈Rn;A(t,x),C(t,s)为n×n连续的函数矩阵;f(t,x),g(t,x),b(t)是n维连续向量.本文利用线性系统的指数型二分性理论和不动点定理研究此系统,建立了保证其周期解存在性.唯一性的充分条件.得到了一些新的结果,推广了相关文献的主要结果. 相似文献
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By employing a fixed point theorem in cones,we investigate the existence of almost periodic solutions to an impulsive pure delay Logistic equation. A set of suffcient conditions for the existence of almost periodic solutions to the equation are obtained. 相似文献
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Zhang Suping 《Annals of Differential Equations》2007,23(1):104-112
In this paper, by using a fixed point theorem of Krasnoselskii, we study the positive periodic solution for a class of nonlinear periodic differential equation with impulses and delay. Firstly, definition of periodic solution and some lemmas are stated. Then some results of the existence of positive periodic solution about the equation are obtained. 相似文献
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By using the concept of almost periodic "sequence", that is, a real valued function on Z satisfying the Bohr almost periodic condition, sufficient conditions are obtained for the existence of almost periodic solutions of Lasota-Wazewska-type differential equations with almost periodic time dependence. 相似文献
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《Annals of Differential Equations》2012,(1):21-25
A priori bounds are established for periodic solutions to a functional differential equation with delay.By means of these bounds,an existence theorem for periodic solutions is obtained using Mawhin’s continuation theorem.Our work generalizes the known result. 相似文献
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1 IntroductionConsider equation of the Duffing fOrmX" cx' g(x) = p(t) (1)where c is a constant, p and g are continuous functions defined on (--oo, oc).In the early years of the l990's, some authors investigated the existence andstability of periodic solution of system (1), when p(t) is a periodic function(see [1],[2]).In this paper, we consider the situation in where p(t) is an almost periodicfunction. Under some conditions, we prove the existence and uniqueness ofalmost periodic soluti… 相似文献
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In this paper, we study the problems on the existence, uniqueness and stability of almost periodic solution for a class of nonlinear system. Using fixed point theorem and Lyapunov functional, the sufficient conditions are given which guarantee the existence, uniqueness and stability of almost periodic solution for the system. 相似文献
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具扰动项的时滞Logistic方程的周期解 总被引:7,自引:0,他引:7
本文首先讨论一类时滞微分方程的周期解的存在性,然后将本文结果应用到具扰动项的 时滞Logistic方程得出其正周期解的存在性,本文结果推广和改进了「1」和「6」的相应结果。 相似文献
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Jiabu Dishen 《Annals of Differential Equations》2014,(4):394-397
A new and convenient method is used to study the existence of periodic solutions to neutral functional differential equations with infinite delay. A new criterion for the existence of periodic solutions is obtained in this paper. 相似文献