The Nonlinear Predator-Prey Singularly Perturbed Robin Initial Boundary Value Problems for Reaction Diffusion System

The nonlinear predator-prey singularly perturbed Robin initial boundary value problems for reaction diffusion systems were considered. Under suitable conditions, using theory of differential inequalities the existence and asymptotic behavior of solution for initial boundary value problems were studied.     

The Nonlinear Nonlocal Singularly Perturbed Problems for Elliptic Equations with Boundary Perturbation

The nonlinear singularly perturbed problem isa very attractive object of study in the internationalacademic circles[1,2].During the past decade manyapproximate methods have been developed and re-fined,including the method of averaging,boundarylayer method,methods of matched asymptotic ex-pansion and multiple scales.Recently,many schol-ars such as Butuzov et al[3],Kelley[4],Hamouda[5],Bell et al[6],do Nascimento[7]and Adams,et al[8]have done a great deal of work.Using the methodof differentia…     

二阶Volterra型积分微分方程非线性边值问题的奇摄动

利用微分不等式理论研究了二阶Volterra型积分微分方程非线性边值问题的解的存在性和唯一性．以上下解为基础，建立了解的唯一性定理，在适当条件下，构造具体的上下解，得到了解的存在性和唯一性．结果表明这种技巧为奇摄动边值问题的存在性和唯一性研究提出了新的思路。     

奇摄动三阶非线性边值问题

利用微分不等式技巧和Volterra型积分算子，研究了三阶非线性奇摄动边值问题εx^(3)=f(t,x,x′,w(ε）x^(3)，ε），g（x′（0），x″（0）=0，x（1）=A，x′（1）=B的存在性及渐近估计。     

A Class of Shock Solutions for the Semilinear Singularly Perturbed Boundary Value Problem

The shock solution for the semilinear singularly perturbed two-point boundary value problem was studied. Under suitable conditions and using the theory of differential inequalities, the existence and asymptotic behavior of the solution for the original boundary value problems are discussed. The uniformly effective asymptotic expansion and estimation of solution u(x, ε) were obtained.     

A Class of Singularly Perturbed Problems for Nonlinear Two-Species Competitive Reaction-Diffusion System

Wang[1-4]studiedthesingularlyperturbedprob lemsofellipticequationsandnonlinearequations,Mo[5]discussedaclassofnonlinearpredator preysin gularlyperturbedRobinproblemsforreaction diffu sionsystems.Thesingularlyperturbedproblemfor nonlineartwo speciescompeti…     

三阶奇摄动非线性边值问题解的唯一性

利用微分不等式理论，研究了三阶奇摄动非线性边值问题，以上下解为基础，建立了解的唯一性定理，在适当条件下，构造具体的上下解，得到了解的唯一性．结果表明这种技巧为奇摄动边值问题的唯一性研究提出了新的思路．     

三阶非线性方程三点边值问题的奇摄动

讨论了三阶非线性微分方程三点边值问题的奇摄动．利用积分算子和微分不等式技巧,得到了解的存在性、唯一性与渐近估计．结果表明,这种技巧为其它三阶边值问题的研究提出了一种新的思路．     

一类三阶奇摄动Robin边值问题解的唯一性

利用常微分方程微分不等式理论研究三阶奇摄动Ｒｏｂｉｎ边值问题,＝Ｃ,在适当的条件下,通过上下解的构造得到了其解的唯一性．     

平面一阶非线性椭圆型方程组的Riemann边值问题

本文研究平面非线性椭圆型方程组的Riemann边值问题:在假设条件(A1)、(A2)、(A3)之下,证明了该问题存在唯一的解1相似文献   

Singularly perturbed differential-difference reaction diffusion equations with time delay

A class of differential-difference reaction diffusion equations with a small time delay is considered. Under suitable conditions and by using the method of the stretched variable, the formal asymptotic solution is constructed. And then, by using the theory of differential inequalities the uniformly validity of solution is proved.     

三阶非线性边值问题的奇摄动

利用微分不等式技巧和Volterra型积分算子，研究了一类三阶非线性奇摄动边值问题解的存在和渐近估计。     

三阶非线性微分方程Robin边值问题的奇摄动

利用微分不等式技巧，研究了三阶非线性微分方程Robin边值问题解的存在性、唯一性及渐近估计．     

奇异的广义m-点边值问题解的存在性

利用Leray-Schauder原理研究了奇异多点边值问题{u″(t)=f(t,u(t),u′(t)) e(t),0＜t＜1 u′(0)=∑m-2i=1biu′(ξi),u(1)=∑m-2i=1aiu(ξi)的C1[0,1)解的存在性,其中ξi∈(0,1),0＜ξ1＜ξ2＜…＜ξm-2＜1,ai,bi∈R为给定常数,i=1,2,...,m-2;且f:[0,1]×R2→R满足广义Carathéodory条件,(1-t)e(t)∈L1[0,1].     

三阶非线性三点边值问题解的存在性和唯一性

利用积分算子和微分不等式技巧,研究了三阶微分方程非线性三点边值问题,得到了解的存在性与唯一性.     

三阶非线性三点边值问题解的存在性和唯一性

用Volterra型积分算子和微分不等式技巧,研究了某一类三阶微分方程非线性三点边值问题,得到了解的存在性与唯一性,此外,在适当的条件下,通过构造具体的上下解,刻划了方法的应用性.     

Asymptotical Properties for Parabolic Systems of Neutral Type

Asymptotical properties for the solutions of neutral parabolic systems with Robin boundary conditions were analyzed by rising the inequality analysis. The oscillations problems for the neutral parabolic systems were considered and some oscillation criteria for the systems were established.     

椭圆方程奇异非线性问题与奇异边值问题正解的存在性

用上下解方法得到了 Ｒｎ 中光滑有界区域上ｆ （ ｘ , ｕ , Ｄｕ） 在ｕ ＝ ０ 处具奇性的椭圆方程 Δｕ＋ ｆ （ ｘ , ｕ , Ｄｕ） ＝ ０ 零边值问题正解的存在性并由此直接获得了“超布朗运动” 中所需的椭圆方程奇异边值问题正确的存在性．     

四阶非线性方程两点边值问题解的存在性

利用上下解理论研究了两类四阶非线性方程两点边值问题解的存在性。     

二阶脉冲泛函微分方程周期边值问题的单调迭代方法

运用上下解及单调迭代技巧讨论了较为广泛的一类二阶脉冲泛函微分方程周期边值问题极解的存在性.