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1.
POSITIVE ALMOST PERIODIC SOLUTIONS OF n DIMENSIONAL NONAUTONOMOUS LOTKA-VOLTERRA COMPETITIVE SYSTEMS
Dishen Jiabu 《Annals of Differential Equations》2007,23(4):400-404
In this paper,we study some n dimensional nonautonomous Lotka-Volterra competitive ecological systems.We then obtain permanence of such systems, as well as the existence,uniqueness and global asymptotic stability of almost periodic positive solutions to these systems. 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
3.
ALMOSTPERIODICSOLUTIONSOFSINGLEPOPULATIONMODELSWITHALMOSTPERIODICENVIRONMENTHeChongyou(NanjingUniversty)(何崇佑)南京大学,邮编:210008Ab... 相似文献
4.
Niu Chengying Chen Xiaoxing 《Annals of Differential Equations》2008,(3):306-316
In this paper, we consider almost periodic discrete two-species competitive sys-tems. By using Lyapunov functional, the existence conditions and uniqueness of almost periodic solutions for the this type of systems are obtained. 相似文献
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1IntroductionAsisknown,therehavebeenquiteafewresu1tsontheexistenceofalrilostperiodicsolutionsforordinaryanddelaydifferentialstystems.However,tothebestofourknowledge,therehavenotappearedanycorrespondingresu1tsfOrevenordinarydifferencesystemssofar.Todealwithsuchproblems,wewilldefinethenotionoftheso-calleduni-formlyalmostperiodicsequencesbesidesthealmostsequencesandasymptoti-callyalmostsequences.Thenweprovidethecriteriaandthebasicpropertiesofuniformlyalmostperiodicsequenceswhichareneededinestabl… 相似文献
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ALMOSTPERIODICSOLUTIONOFTWO-SPECIESPATCHTYPENONAUTONOMOUSDIFFUSIVELOTKA-VOLTERRACOMPETITIVE MODELSLuoGuilie(罗桂烈),LiaoMinli(廖民... 相似文献
7.
高维系统周期解的存在性与唯一性 总被引:1,自引:0,他引:1
本文首先利用一种新方法讨论高维系统解的一致有界性,一致最终有界性及非常稳定性问题,然后将所获结果应用于高维系统周期解的存在性与唯一性的研究。另外,本文还提出了“阶梯形系统”的概念,并对其建立了一种利用系统部分方程周期解存在性判定整个系统周期解存在性的方法。 相似文献
8.
In this paper, by using the comparing theorem, Razumikhin-type theorem and V-function method, we consider a nonautonomous predator-prey system with stage-structure and time-delay. We get the sufficient conditions for the uniform persistence and the solutions global attractivity of this system. For a periodic system, we obtain the existence and uniqueness of a positive periodic solution of this system. For an almost periodic system, we prove the existence and the uniform asymptotic stability of the almost periodic solutions of this system. 相似文献
9.
1MainResultsConsidersystem11~.x f(x)x' g(x)~0(1)wheref(x)islocallyintegrable,g(x)isdifferentiablealldg(0)=0.Theroem1Thezerosolutionofsystem(1)isuniformlyasymptoticallystableifbyequivalenttransf'Ormu=xov=X' F(x).DefineW[t,(uif\v)]j6ug(s)ds Iv',thenwisaposi… 相似文献
10.
一类概周期时滞捕食-食饵系统的概周期解 总被引:3,自引:0,他引:3
本文讨论一类概周期时滞捕食-食饵系统的一致持久性,通过构造一个Liapunov函数得到该系统有界解的唯一性,并且给出正概周期解的存在唯一性定理。 相似文献
11.
两种群非自治Lotka-Volterra竞争扩散系统的概周期解 总被引:6,自引:0,他引:6
本文讨论两种群概周期竞争扩散系统,利用微分不等式,证明了系统概周期解的存在、唯一性及其在壳扰动下的稳定性. 相似文献
12.
This paper studies equation x" + cx' + g(x) = P(t,x). Under some suitable conditions the existence and uniqueness of almost periodic solution of this equation are given. 相似文献
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14.
A nonautonomous stage-structured two species model with time delay anddiffusion is considered. It is shown that the system is uniformly persistent undersome conditions. By discussing the independent subsystem, more brief sufficientconditions are drawn for a unique positive periodic solution which is globallyattractive and the existence of the positive almost periodic solution which isuniformly asymptotically stable by the Razumikhin function method. 相似文献
15.
Deng Chunhong Feng Chunhua 《Annals of Differential Equations》2006,22(2):149-153
By means of the fixed point theorem and exponential dichotomy, in this paper we investigate the existence of almost periodic solutions to a class of n-dimensional almost periodic systems, which is more general than the systems in [1-2]. We generalize and improve some results in [3]. 相似文献
16.
本文给出:如果一致概周期函数f(t,x)满足:i)f(t,0)=0;ii)Dxf(t,x)在R×D上有界(D是Rn中含原点的一个区域);iii)对t一致成立,那么系统关于B1(所有满足i),ii)的一致概周期函数全体所成之集按范数构成的赋范线性空间)在原点邻域局部结构稳定的充要条件是它的零解变分系统在R上具有指数型二分性.进而得到系统关于B1在原点邻域局部结构稳定是可继承的.并推出这类结构稳定的系统在B1的某子空间中是处处稠密的. 相似文献
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18.
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
19.
By using Lyapunov function and differential inequality, sufficient conditions for the existence of global asymptotical stable almost periodic solution of the three-species almost periodic modei with the type II functional response are obtained. 相似文献
20.
本文利用Liapunov-Schmidt方法获得了高维自治系统在共振情况下决定周期解个数的分支函数,并通过计算分支函数的主项,分析分支函数的零点,研究了具两对共轭特征根的四维系统多个周期解的共振分支问题. 相似文献