具有无穷时滞的Lotka-Volterra食物链模型的全局吸引性

研究一类具有无穷时滞的n种群Lotka Volterra食物链系统 .通过构造适当的Lya punov泛函 ,得到了保证该系统正平衡点全局吸引的充分条件 .     

周期二维Lotka—Volterra系统的一些新结果

该文研究周期二维Lotka－Volterra捕食食饵系统解的有界性，持续生存性以及正周期解的存在性和全局稳定性．并将结果推广到食饵有补充的周期二维Lotka－Volterra竞争系统上去，得到了一系列新的结果，改进和推广了文[1—3]的主要结论．     

捕食者一食Lotka—Volterra系统的概周期解

研究了有m个捕食者n个食饵的概周期Lotka—Volterra系统．得到了系统共存的条件．此外,还得到了系统概周期解存在唯一并且全局渐近稳定的条件．     

一类Lotka—Volterra方程的通解

本文研究一类具有重要应用价值的Lotka—Volterra方程的求解问题.通过加入调整函数,将这类比较复杂的方程变为简单的一阶线性方程,进而求得方程的通解.     

污染环境中三维竞争系统的生存阈值

本文用积分均值法，首次讨论了带有毒素影响的三维竞争系统的Lotka－Volterra模型，得到了各种群平均持续生存与绝灭的阈值．文中所得结论对环境污染以及生物种群影响的理论研究和实际应用有重要意义．文[5,6]的主要结论包含在本文的结果中．     

一类具时滞的中立型Lotka-Volterra模型的周期解

讨论了n种群时滞的中立型Lotka Volterra生态模型。利用新的重合度理论中连续性定理 ,得到了该模型正周期解存在性的充分条件     

具时滞的捕食 食饵系统的一致持久性

研究周期环境下具时滞的Volterra Lotka捕食 食饵系统，利用持久性理论，积分均值和微分不等式的方法，建立了关于一致持久的 充分必要判别准则。得到新的结果。     

一类具时滞生态系统的概周期解

对具有限时滞和带扩散效应的Lotka—Volterra系统进行了研究，证明了在一定条件下系统是一致持久的，并利用建立Lyapunov函数的方法得到了系统的概周期解存在惟一和全局渐近稳定的充分条件。     

一类具有无穷时滞和功能反应的捕食扩散系统的持久性与稳定性

研究一类非自治的具有HollingⅡ类功能性反应且包含时变时滞与多个无穷时滞的两种群n斑块捕食扩散系统的持久性与稳定性.利用比较原理,结合构造Lyapunov泛函的方法,得到了保证该系统永久持续生存和任意正解全局渐近稳定的充分性条件.     

环境污染中三维Volterra系统持续生存与绝灭的阈值

本文对环境容量很大且被污染的三种群系统进行了研究，得到了三维Volterra捕食-被捕食系统持续生存与绝灭的阈值．     

一类多偏差变元的n种群Lotka-Volterra模型的周期正解

本文研究了一类多偏差变元Lotka-Volterra种群模型的间期正解问题,利用重合度拓展定理和一些分析技巧,得到了周期正解存在性的新结果.与已有文献相比,本文所讨论的模型更具一般性,它包含了以前人们所研究的竞争-种群模型、捕食-种群模型等,而且估计先验界的方法也是全新的.     

非自治竞争Lotka—Volterra系统的持续生存和全局稳定

本文研究一般ｎ个种群竞争的非自治Ｌｏｔｋａ－Ｖｏｌｔｅｒｒａ系统,得到了系统一致持续生存和全局渐近稳定的新的判别准则,这些准则推广了现有有关文献中的一些结果。     

Profitless delays for extinction in nonautonomous Lotka-Volterra system

IntroductionCOnsider the folbeing 8ystem of differentiaJ equations'This system models competition among n species. Here xi(t) denotes the concentration of theith specthe at thoe t, and bi(t) is it5 growth rate at this time, a,j(t) denote the competitivecoefficient between the ith species and the jth species, and when i = j, aij(t) denotes thedensity-dependent rate of the ith species; n(t) is the time deviating argUments at time t(i,j = l,2,',n). As n(t) - 0 for j = l,',n, system (1) is k…     

n种群Lotka-Volterra时滞竞争反馈控制生态系统的全局吸引性

本文利用比较原理结合构造Lyapunov泛函的方法,讨论了一类纯时滞n种群 Lotka-Volterre竞争反馈控制生态系统的的全局吸引性,得到一些新结果．这些结果补充和完善了Fan,Wong和Agarwal的结果．     

ASYMPTOTIC PROPERTY FOR A LOTKA-VOLTERRA COMPETITIVE SYSTEM WITH DELAYS AND DISPERSION

An n-species nonautonomous Lotka-Volterra competition and diffusion model with time delays is investigated. It is shown that the system is uniformly persistent under some appropriate conditions, and by using the skill of constructing an appropriate Lyapunov function, the new sufficient conditions are obtained for the global asymptotic stability and the uniqueness of the positive periodic solution.     

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。     

Dynamics of a general non-autonomous stochastic Lotka-Volterra model with delays

In this paper, a general non-autonomous n-species Lotka-Volterra model with delays and stochastic perturbation is investigated. For this model, sufficient conditions for extinction, non-persistence in the mean, weak persistence and stochastic permanence are established. The influences of the stochastic noises to the properties of the stochastic model are discussed. The property permanence for the model is preserved with the sufficiently small noise and sufficiently large noise may cause extinction of the model. The critical value between weak persistence and extinction is obtained. Finally, numerical simulations are given to support the theoretical analysis results.     

Global stability for n-species lotka-volterra systems with delay,ii: reducible cases,sufficiency

In this paper an n-species delayed Lotka-Volterra system without de1ayed intraspecific competitions is considered. It is proved that the system is globally stable for all off-diagonal delays T_ij≥0 provided the interaction matrix A of the system satisfies the weakly diagonally dominant Condition (WDD)     

GLOBAL ASYMPTOTIC STABILITY IN N-SPECIES NONAUTONOMOUS LOTKA-VOLTERRACOMPETITIVE SYSTEMS WITH DELAYS

A delayed n-species nonautonomous Lotka-Volterra type competitive system without dominating instantaneous negative feedback is investigated. By means of a suitable Lyapunov functional, sufficient conditions are derived for the global asymptotic stability of the positive solutions of the system. As a corollary, it is shown that the global asymptotic stability of the positive solution is maintained provided that the delayed negative feedbacks dominate other interspecific interaction effects with delays and the delays are sufficiently small.