positive stability

We respectively obtain sufficient conditions of no limit cycle and the global stability of positive equilibrium point by using of Dulac function method and Liapunov function method.

运用Dulac函数法和构造恰当的Liapunov函数法，分别得到了系统无环的充分条件和正平衡点全局稳定性的充分条件。

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The results showed that both the compound stabilizers of LDHs/ lead salts and LDHs/ organotin had positive synergic effect on thermal stabilization of PVC, and the PVC filled with LDHs/ organotin exhibited the best thermal stability.

结果表明：镁铝水滑石分别与铅盐、有机锡进行复配均具有较好的协同效应且后者对PVC的稳定效果更好。

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Sustainable economic growth requires to keep a positive real saving rate and the stability of important environment function.

可持续经济增长的核心是要协调经济增长与环境可持续的矛盾，在经济层面，可持续经济增长要求一个经济的真实储蓄率为正，在环境层面则要保持重要的环境功能的稳定性。

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Chinese profound moral culture, filial piety in traditional society is always in the first pan-German and German position, several thousand years of maintaining family harmony, social stability and economic development have played a positive role.

中华博大精深的道德文化中，孝道文化在传统社会始终处于首德地位，几千年来对维系家庭和谐、社会稳定以及经济发展都起到了积极作用。

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The global asymptotic stability of the positive equilibrium of the model with one population is considered by using the monotone theory of functional differential equations.

首先利用泛函微分方程的单调理论分析了单种群chemostat模型正平衡点的全局渐近稳定性。

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