一类三阶非线性时滞系统的全局渐近稳定性

运用"类比法"对一类三阶非线性时滞系统构造了较好的Lyapunov函数,得到该系统零解全局渐近稳定的充分条件.     

具有连续时滞和基于比率的非自治捕食扩散系统的持续生存

研究具有连续时滞和基于比率的非自治捕食扩散系统.证明了该系统一致持久性及任何正解全局渐近稳定性的充分条件.     

一类高阶时滞差分方程的有界持久性与全局渐近稳定性

获得一类高阶时滞差分方程解的有界持久性和全局渐近稳定性的充分条件;所得结果部分地解决了G.Ladas的2个公开问题,推广了一些已知结果。     

一类修正的Holling-Tanner捕食模型的持久性和全局渐近稳定性

研究了一类修正了捕食种群的功能反应函数的食饵-捕食Holling-Tanner扩散模型,在Neumman边界条件下,得到了模型持久性的一个充分条件,并且用比较原理和上下解方法证明了此模型唯一的正的常数平衡解是全局渐近稳定的.     

具有时滞的周期Lotka-Volterra型系统的全局渐近稳定性

考虑一般具有时间依赖时滞和连续分布时滞的Ｎ－种群周期Ｌｏｔｋａ－Ｖｏｌｔｅｒｒａ型系统。通过使用Ｌｉａｐｕｎｏｖ函数方法得到了关于正周期解的存在性和全局渐近稳定性的充分条件。这些条件改进和推广了最近被Ｗａｎｇ,Ｃｈｅｎ,Ｌｕ「２」和Ａｈｌｉｐ,Ｋｉｎｇ「４」得到的相应结果。     

时滞差分方程的正解与全局渐近稳定性

本文通过研究一类一阶变系数时滞差分方程ｘｎ＋１－ｘｎ＋∑ｓｉ＝１ｐｉ，ｎｘｎ－ｋｉ＝０，ｎ＝０，１，２，…的一个正解的性质，得到了它的零解为全局渐近稳定的充分条件．     

一类具有时滞和比率依赖的竞争扩散系统

研究了一类具有时滞和基于比率的两种群非自治竞争扩散系统.利用比较原理证明了系统在适当条件下是一致持久的;利用B row er不动点原理和构造Lyapunov泛函,得到了系统存在唯一全局渐近稳定周期正解的充分条件.     

一类具有时滞和移民项的传染病模型的稳定性分析（英文）

本文研究一类具有移民项和潜伏期时滞的传染病模型,讨论了模型平衡点的存在性和解的一致持续性,利用Lyapunov泛函和Lyapounov-LaSalle不变性原理,建立了唯一的平衡点的全局渐近稳定性.     

非线性时滞差分方程的全局渐近稳定性

考虑非线性时滞差分方程xn+1-xn+pnxn-k=f(n,xn-l)(*)n=1,2,…其中pn＞0,k,l∈N={0,1,2,…},f(n,x)N×R→R关于x连续,本文获得了上述方程零解全局渐近稳定的充分条件,推广了文[1]的结果.     

非线性时滞差分议程的全局渐近稳定性

In this paper,a sufficient condition for the global asymptotic stability of the solutions of the following nonlinear delay difference equation is obtained,xn 1=xn xn-1xn-2 a/xmxm-1 xn-2 a,n=0,1…,where a∈(0,∞) and the initial values x-2,x-1,x0∈(0,∞).As a special case,a conjecture by Ladas is confirmed.     

PERSISTENCE AND GLOBAL STABILITY FOR TWO-SPECIES NONAUTONOMOUS PREDATOR-PREY SYSTEM WITH DIFFUSION AND TIME DELAY

In this paper, a non-autonomous predator-prey model with diffusion andcontinuous time delay is studied, where the prey can diffuse between two pat-ches of a heterogeneous environment with barriers between patches, but for thepredator, the diffusion does not involve a barrier between patches, further itis assumed that all the parameters are time-dependent. It is shown that thesystem can be made persistent under some appropriate conditions. Moreover,sufficient conditions that guarantee the existence of a unique periodic solutionwhich is globally asymptotic stable are derived.     

多时滞捕食-食饵系统正平衡点的稳定性及全局Hopf分支

本文首先用Cooke等人建立的关于超越函数的零点分布定理,研究了一类多时滞捕食-食饵系统正平衡点的稳定性及局部Hopf分支,在此基础上再结合吴建宏等人用等变拓扑度理论建立起的一般泛函微分方程的全局Hopf分支定理,进一步研究了该系统的全局Hopf分支.     

GLOBAL ASYMPTOTIC STABILITY OF PERIODIC SOLUTION IN N-SPECIES COMPETITION SYSTEM WITH TIME DELAYS

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｉｓｋｎｏｗｎｔｈａｔｍｅｔｈｏｄｓｏｆｍａｔｈｅｍａｔｉｃａｌｍｏｄｅｌｃａｎｂｅｕｓｅｄｔｏｄｅｓｃｒｉｂｅｔｈｅｄｙｎａｍｉｃａｌｂｅｈａｖｉｏｒａｍｏｎｇｓｐｅｃｉｅｓｉｎｅｃｏｌｏｇｙ．Ｒｅｃｅｎｔｌｙｍａｎ...     

具有扩散和比率依赖的三种群混合模型的分析

本文讨论了捕食者具有比率依赖的功能性反应,食饵与另一种群竞争且自身可以 扩散的混合模型.证明了系统一致持久与扩散有关,而且得到了系统存在全局吸引周期 解的充分条件.     

一类具有时滞的比率依赖捕食者-食饵模型的全局Hopf分支

本文研究了一类比率依赖的捕食者-食饵模型的Hopf分支问题,运用吴建宏等人利用等变拓扑度理论建立起的一般泛函微分方程的全局分支理论,得到了由系统的正平衡点分支出来的周期解的全局存在性,最后利用数值模拟验证了理论分析的正确性.     

具有扩散的捕食与被捕食系统的持续性和稳定性

本文研究了一类具有扩散和时滞的捕食与被捕食系统,证明了在适当条件下系统 是一致持续的,利用同伦技术证明了正平衡点的存在性,构造适当的Lyapunov函数获得 了正平衡点的局部和全局稳定的充分条件.     

LOCAL AND GLOBAL HOPF BIFURCATIONS FOR A PREDATOR-PREY SYSTEM WITH TWO DELAYS

In this paper, the Leslie predator-prey system with two delays is studied. The stability of the positive equilibrium is discussed by analyzing the associated characteristic transcendental equation. The direction and stability of the bifurcating periodic solutions are determined by applying the center manifold theorem and normal form theory. The conditions to guarantee the global existence of periodic solutions are given.     

GLOBAL STABILITY OF AN SIRS EPIDEMIC MODEL WITH DELAYS

In this article, an SIRS epidemic model spread by vectors (mosquitoes) which have an incubation time to become infectious is formulated. It is shown that a disease-free equilibrium point is globally stable if no endemic equilibrium point exists. Further, the endemic equilibrium point (if it exists) is globally stable with a respect \"weak delay\". Some known results are generalized.     

A PREDATOR-PREY SYSTEM WITH STAGE STRUCTURE AND HARVESTING FOR PREDATOR

In this paper, we consider a predator-prey system with stage structure and harvesting (where the predator population has two stages, an immature stage and a mature stage with harvesting, and the growth of the prey population is of Lotka-Volterra nature). We obtain the conditions of the globally asymptotic stability for three nonne-gative equilibria of this system.     

ON GLOBAL ROBUST STABILITY FOR COMPETITIVE NEURAL NETWORKS WITH TIME DELAYS AND DIFFERENT TIME SCALES

In this paper, using the theory of topological degree and Liapunov functional methods, the authors study the competitive neural networks with time delays and different time scales and present some criteria of global robust stability for this neural network model.