An asymptotic solving method for the periodic solution of a class of disturbed nonlinear evolution equation

<正>A class of disturbed evolution equation is considered using a simple and valid technique.We first introduce the periodic traveling-wave solution of a corresponding typical evolution equation.Then the approximate solution for an original disturbed evolution equation is obtained using the asymptotic method.We point out that the series of approximate solution is convergent and the accuracy of the asymptotic solution is studied using the fixed point theorem for the functional analysis.     

A class of singular perturbation solutions to semilinear equations of fourth order

A class of singularly perturbed boundary value problems for semilinear equations of fourth order with two parameters are considered. Under suitable conditions, using the method of lower and upper solutions, the existence and the asymptotic behavior of the solution to the boundary value problem are studied, In the present paper, the solution to the original singularly perturbed problem with two parameters has only one boundary layer.     

Asymptotic solution of nonlocal nonlinear reaction-diffusion Robin problems with two parameters

In this paper, the nonlocal nonlinear reaction-diffusion singularly perturbed problems with two parameters are studied. Using a singular perturbation method, the structure of the solutions to the problem is discussed in relation to two small parameters. The asymptotic solutions of the problem are given.     

Singularly perturbed solution to semilinear reaction diffusion equations with two parameters

A class of singularly perturbed initial boundary value problems for semilinear reaction diffusion equations with two parameters is considered, Under suitable conditions and using the theory of differential inequalities, the existence and the asymptotic behavior of the solution to the initial boundary value problem are studied.     

Singularly perturbed reaction diffusion equations with time delay

Abstract A class of initial boundary value problems of differential-difference equations for reaction diffusion with a small time delay is considered. Under suitable conditions and by using the stretched variable method, a formal asymptotic solution is constructed. Then, by use of the theory of differential inequalities, the uniform validity of the solution is proved.     

Soliton solution to generalized nonlinear disturbed Klein-Gordon equation

A generalized nonlinear disturbed Klein-Gordon equation is studied. Using the homotopic mapping method, the corresponding homotopic mapping is constructed. A suitable initial approximation is selected, and an arbitrary-order approximate solution to the soliton is calculated： A weakly disturbed equation is also studied.     

一个奇摄动催化反应问题

本文讨论了一个奇摄动催化反应问题,得到了问题的形式渐近解,证明了它的一致有效性。     

一类奇摄动非线性椭圆型系统

本文讨论了一类在带形区域中的非线性椭圆型系统的奇轻边值问题,在适当的条件下 比较定理台相应边值问题解的存在性和斩近性态作了研究。     

在局部区域上的奇摄动非线性方程Robin边值问题解的渐近性态

本文是讨论了一类在局部区域上的奇摄动非线性方程Ｒobin边值问题,利用泛函数分析及算子理论,得到了相应问题解的渐近性态。     

奇摄动燃烧反应扩散问题

本文讨论了一类奇摄动燃烧反应扩用Ｒｏｂｉｎ问题,利用微分不等式理论,证明了问题解的存在性等式并得到了解的斩近估计。