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For high altitude satellite, dissipative effect is not important at all, Perturbed by the attraction of the third body, the eccentricity will also have long periodic variation with large amplitude because of the apsidal resonance.

对于高轨卫星，大气的耗散效应已不重要，但在第三体引力摄动下，近点共振效应会使卫星轨道偏心率e出现大变幅的长周期变化，导致卫星落在主星上结束其轨道寿命。

A feedforward adaptive control system based on ARX model description has been developed and applied to the control of structural vibration excited by Pseudo-periodic signals.

发展一种基于ARX模型描述的实时自适应前馈控制系统，并将其应用到具有拟周期扰力的结构振动控制中。

We obtain the conditions of asymptotical stability of the pest-eradication periodic solution and permanence of the system.

在第四章中，应用天敌助增(即天敌的人工繁殖和释放)的方法，建立了在固定时刻释放天敌的具有一般功能性反应的三种群的食物链模型，并系统地研究了系统在释放天敌这种外在的不连续受迫作用下的动力学性质，得到了害虫根除周期解存在性和渐近稳定性，以及系统持续生存的条件。4。

Nonnegativity of solutions, state stability, existence and uniqueness, asymptotical behavior of stable solutions, and existence of periodic solutions are studied.

研究了该问题解的非负性，稳态解的存在唯一性和渐近性以及周期解的存在性。

The asymptotical behaviors and periodic oscillations have been studied by applying the modern theories of difference equations.

应用现代差分方程理论对这些数学模型解的渐近性态与周期振荡进行了详细的讨论研究。

In the context of the TOMS data,investigated are atmospherical total ozone secular trends (1979～1992),interannual changes as well as seasonal and periodic variations over Arctic and Antarctic.

利用TOMS资料分析了南北极区大气臭氧总量的多年（1979～1992）趋势变化、年际变化、季节变化及周期性变化特征。

The core energy of a 60° shuffle set dislocation was investigated by an atomistic simulation method based on the Stillinger-Weber potential and periodic boundary condition.

本文使用Stillinger-Weber势函数和周期性边界条件，通过在原子尺度上的分子动力学计算研究了60°位错的位错心能量和运动情况。

Sufficient conditions are derived for the permanence and for the existence, uniqueness and global attractivity of periodic solution.

给出了当系统为周期系统时，其周期解存在惟一和全局吸引的条件

Furthermore,by means of constructing a Lyapunov functional,we attain to the sufficient conditions for the global attractivity of a positive periodic solution of this model.

在最后一章，利用重合度方法，我们考虑了一类具有功能反应的离散种群动力系统正周期解的存在性。

By Independent-subsystem method, the results of existence and global attractivity of a positive periodic solution are obtained.

本文运用重合度理论中的Mawhin延拓定理或系统的持久性结果得到了几类种群生态学模型正周期解的存在性条件；并通过构造Lyapunov泛函(或Razumikhin函数)研究了某些模型正周期解的全局吸引性。

Through all levels' embodiment of the political system,China's political party system is suitable for the devel...

我国政党制度适应了社会主义政治文明发展的必然要求，是我国政治文明的制度基础。

Of course, fund of this illicit collect is not pure the advantage that offers financing for the project of golden ground oneself, more important is, estate fund will offer brand-new profit point of growth for the group.

当然，该私募基金不是单纯为金地自身的项目提供融资的便利，更为重要的是，房地产基金将为集团提供全新的利润增长点。