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本文研究了一类非自治捕食-被捕食的周期系统.当周期为ω>0时,在某些条件下证明了该系统正周期解的存在唯一性和全局渐近稳定性. 相似文献
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系统的讨论了具有比率依赖和密度制约的周期捕食-被捕食系统的持久性问题,不仅得到了系统一致持久的充分条件,还得到了必要条件,并且持久性条件在模型中得到验证. 相似文献
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研究了具有Beddington-DeAngelis功能反应函数和密度制约的捕食-被捕食系统的殆周期解.得到正不变性和持久性的充分条件,还通过构造李雅普诺夫函数得到惟一正殆周期解存在和全局渐近稳定的充分条件. 相似文献
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研究具有反馈控制的非自治多种群捕食-被捕食系统的持久性与全局吸引性.通过引入函数上、下平均的概念,得到系统持久和全局吸引的均值条件,同时将文献[7]的结果推广到了时滞非自治系统上. 相似文献
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研究一类具有隔离干预和可分离广义传染率的SIQRS传染病模型的全局稳定性,得到了阈值R及无病平衡点和地方病平衡点的存在的条件,并利用构造李雅普诺夫函数证明无病平衡点和地方病平衡点的全局稳定性. 相似文献
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Lyapunov functions are given to prove the global asymptotic stability of a large class of predator-prey models, including the ones in which the intrinsic growth rate of the prey follows the Ricker-law or the Odell generalization of the logistic law, and the functional predator response is of Holling type.Work supported by M.U.R.S.T., 60%. 相似文献
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应用能量估计方法和Bootstrap技巧证明含有两类竞争的食饵种群和一类捕食者种群的三种群捕食者-食饵扩散模型在空间维数小于6时古典解的整体存在性. 相似文献
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Philipp Getto Anna Marciniak-Czochra Yukihiko Nakata Maria dM. Vivanco 《Mathematical biosciences》2013
We present a global stability analysis of two-compartment models of a hierarchical cell production system with a nonlinear regulatory feedback loop. The models describe cell differentiation processes with the stem cell division rate or the self-renewal fraction regulated by the number of mature cells. The two-compartment systems constitute a basic version of the multicompartment models proposed recently by Marciniak-Czochra and collaborators [25] to investigate the dynamics of the hematopoietic system. Using global stability analysis, we compare different regulatory mechanisms. For both models, we show that there exists a unique positive equilibrium that is globally asymptotically stable if and only if the respective reproduction numbers exceed one. The proof is based on constructing Lyapunov functions, which are appropriate to handle the specific nonlinearities of the model. Additionally, we propose a new model to test biological hypothesis on the regulation of the fraction of differentiating cells. We show that such regulatory mechanism is incapable of maintaining homeostasis and leads to unbounded cell growth. Potential biological implications are discussed. 相似文献
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研究了一类基于比率的具有反馈控制的非自治捕食模型,得到了系统一致持久和其周期系统存在唯一全局渐近稳定的周期解的充分性条件. 相似文献
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具非线性饱和功能反应的捕食者-食饵系统的定性分析 总被引:1,自引:0,他引:1
研究了一类具有非线性饱和功能反应的捕食者—食饵系统的定性行为.结果表明:当正平衡点稳定时,系统为全局渐近稳定的;当正平衡点不稳定时,系统存在唯一稳定的极限环. 相似文献
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Korobeinikov A 《Bulletin of mathematical biology》2006,68(3):615-626
Lyapunov functions for two-dimension SIR and SIRS compartmental epidemic models with non-linear transmission rate of a very general form f(S,I) constrained by a few biologically feasible conditions are constructed. Global properties of these models including these with vertical and horizontal transmission, are thereby established. It is proved that, under the constant population size assumption, the concavity of the function f(S,I) with respect to the number of the infective hosts I ensures the uniqueness and the global stability of the positive endemic equilibrium state.
AMS Classification 92D30 (primary), 34D20 (secondary) 相似文献