具有时滞的非自治的Lotka-Volterra生态系统的全局稳定性

考虑一个具有时滞的非自治的捕食——食饵生态系统。该系统是由一个捕食，二个食饵种群所构成我们给出了系统的周期解是全局稳定的充分条件。     

Banach空间n阶非线性积分-微分方程初值问题解的存在性

用Tonelli方法研究了Banach空间中n阶非线性积分—微分方程初值问题，在非线性增长条件下，获得了初值问题解的存在性及其Tonelli迭代逼近。     

Improved genetic operator for genetic algorithm

The mutation operator has been seldom improved because ressearchers hardly suspect its ability to prevent genetic algorithm(GA) from converging prematurely.Due to its importance to GA,the authors of this paper study influence on the diversity of genes in the same locus,and point out that traditional mutation,to some extent,can result in premature convergence of genes(PCG) in the same locus.The above drawback of the traditional mutation operator causes the loss of critical alleles.Inspired by digital technique,we introduce two kinds of boolean operation into GA to develop a novel mutation operator and discuss its contribution of preventing the loss of critical alleles.The experimental results of function optimizatioin show that the improved mutation operator can effectively prevent premature convegence,and can provide a wide selection range of control parameters for GA.     

具有hollingⅢ类功能反应的非自治捕食系统概周期解

讨论了一类具有hollingⅢ类功能反应的非自治捕食概周期系统，得到了该系统存在的唯一一致渐近稳定概周期解的充分条件。     

某些椭圆算子基本解之间的关系

本文在适当的假设下.给出了某些变系数椭圆算子基本解间的一些关系.可用来研究一些椭圆算子解的性质.     

Yoshizawa一个定理的推广

应用Ｌｅｒａｙ－Ｓｃｈａｕｄｅｒ度理论，将Ｙｏｓｈｉｚａｗａ定理推广到具超前微分差分方程上。