Nonlinear predator-prey singularly perturbed Robin Problems for reaction diffusion systems

The nonlinear predator-prey reaction diffusion systems for singularly perturbed Robin Problems are considered. Under suitable conditions, the theory of differential inequalities can be used to study the asymptotic behavior of the solution for initial boundary value problems. Project supported by the National Natural Science Foundation of China (No. 10071048), and by the “Hundred Talents Project” of the Chinese Academy of Sciences     

Asymptotic solution for a class of weakly nonlinear singularly perturbed reaction diffusion problem

Under appropriate conditions, with the perturbation method and the theory of differential inequalities, a class of weakly nonlinear singularly perturbed reaction diffusion problem is considered. The existence of solution of the original problem is proved by constructing the auxiliary functions. The uniformly valid asymptotic expansions of the solution for arbitrary mth order approximation are obtained through constructing the formal solutions of the original problem, expanding the nonlinear terms to the power in small parameter e and comparing the coefficient for the same powers of ε. Finally, an example is provided, resulting in the error of O(ε2).     

Quasilinear singularly perturbed problem with boundary perturbation

A class of quasilinear singularly perturbed problems with boundary perturbation is considered. Under suitable conditions, using theory of differential inequalities we studied the asymptotic behavior of the solution for the boundary value problem.     

Quasilinear singularly perturbed problem with boundary perturbation

A class of quasilinear singularly perturbed problems with boundary perturbation is considered. Under suitable conditions, using theory of differential inequalities we studied the asymptotic behavior of the solution for the boundary value problem.     

一类非线性反应扩散奇摄动问题

研究了一类具有非线性反应扩散奇摄动问题。在适当的条件下，利用微分不等式理论，讨论了当退化问题具有两个相交解时，原初始边值问题解的渐近性态。     

一类三种群的捕食-被捕食弱耦合反应扩散生态系统解的渐近性态

研究了一类非线性三种群弱耦合捕食—被捕食反应扩散系统的初边值问题,在适当的条件下,利用反应扩散方程理论、多重尺度变量和微分中值定理,结合分析技巧,对此问题解的存在性及渐近性态作了较深入的研究,得到了问题解的存在性和一致有效性.     

一类时滞的扩散捕食--食饵系统的持久性

研究一类时滞三种群捕食-食饵扩散系统的持久性,利用微分方程比较原理,得到保证系统持久性的充分条件,并举例说明了其结果的可行性.     

奇摄动积分微分方程组Robin边值问题

本文讨论一类积分微分方程组Robin边值问题,在一定假设条件下,证明了解的存在性,并给出解的N阶渐近展开式,估计了余项。     

非线性奇摄动椭圆型方程问题

研究了一类具有非线性椭圆型方程奇摄动问题，在适当的条件下，利用微分不等式理论，讨论了当退化问题具有两个相交解时，原边值问题解的渐近性态。     

一类非线性奇摄动问题的渐近解

利用奇异摄动的相关理论,研究了一类非线性奇摄动边值问题。首先求得原问题的内部解和外部解。其次,在适当的条件下,使用匹配原则y=Y°,匹配原问题的内、外部解,解得待定常数,继而得到参数k取不同值时该问题解的渐近展开式。从而推广了文献（王莉婕．一类非线性奇摄动问题的匹配解法．大学数学,2005,21（4）：46—48）中的相应结论,并且也为估计相关类型非线性问题的解提供了一种有效的方法。     

An Existence Theorem for Strongly Nonlinear Implicit Complementarity Problems

A class of strongly nonlinear implicit complementarity problems for set-valued mappings in Hilbert spaces is studied. Thereupon a new existence theorem is established and proved to be a solution to that kind of problems.     

在部分区域上的奇摄动反应扩散方程初始边值问题解的渐近性态

讨论一类在部分区域上的奇摄动反应扩散方程初始边值问题。利用算子理论 ,得到了相应问题解的渐近性态。     

一类非线性m-点边值问题正解的存在性与多解性

通过运用锥拉伸压缩型的不动点定理,对于一类非线性二阶m点边值问题建立了正解以及n个正解的存在性定理.