Li nard系统非平凡周期解的不存在性

给出了Li nard系统有多个奇点时非平凡周期解不存在的条件     

Existence of Travelling Waves with Strong Generic Kernel in a Vector-Disease Model

In this paper,traveling wave solutions for a vector-disease model incorporating time delay and diffusion have been studied.The existence of traveling wave solutions for the sufficiently small delays has been proved.In order to solve these problems,we are able to deal with travelling wave solutions using dynamical systems techniques,invariant manifold theory,together with linear chain techniques and the geometric singular perturbation theory.For the strong generic delay kernel,traveling wave solutions exist while the delay is sufficiently small,using the methods above.     

一类非线性椭圆型方程整体爆炸解的存在性

应用摄动方法，证明了一类非线性椭圆型方程整体解的存在性。     

Liénard系统非平凡周期解的不存在性

给出了Liénard系统有多个奇点时非平凡周期解不存在的条件．     

Existence of Explosive Solutions for a Class of Nonlinear Elliptic Equations

By the subsuper solutions method, the explosive supersolutions and explosive subsol utions are obtained and the exsistence of explosive solutions is proved on a bounded domain for a class of nonlinear elliptic problems.Then, the exsitence of an entire large solution is proved by the perturbed method.     

一类具有产毒浮游植物的交叉扩散浮游生物模型的图灵斑图

针对浮游生物生态系统中交叉扩散对该系统动力学行为的影响,采用线性化及微分方程定性理论的方法研究了系统正平衡点的稳定性及图灵不稳定性发生的条件。研究结果表明交叉扩散是导致图灵斑图产生的重要因素。数值模拟也验证了理论结果。     

一类捕食食饵系统中交叉扩散诱导的图灵不稳和斑图

研究了一类具有交叉扩散的捕食食饵模型的斑图形成.证明了交叉扩散破坏了正平衡点的稳定性,得到了交叉扩散导致不稳的条件.另外,数值模拟结果不仅支持了该理论,还显示模型具有复杂的空间斑图:条状斑图、点状斑图以及点条混合斑图.研究结果表明交叉扩散在斑图的形成中起着重要的作用.