本文给出接近临界角吋，地球形状的全部一阶摄动和二阶长期摄动的计算方法。
This article gives the computing methods of all first order pertubations and second order secular pertubations about the oblate earth in the vicinity of critical inclination.
用数值积分来计算长周期和长期摄动，而用经典分析解的表达式来计算短周期摄动，这是很有效的。
It is efficient to compute long-period and secular perturbations by numerical integration, but the classical analytic solution may be used to calculate the short-period perturbations.
采用奇异摄动模型，通过一个简单电力系统在大干扰下发生中长期失稳的实例，分析了慢动态对系统中长期失稳的影响。
Using singular perturbation model, by the example of a simple power system losing stability in big disturbance, this paper analyses the mid-long term instability mechanisms affected by slow dynamics.
最后给出构形长期引力摄动的相关结论，并对编队构形设计提出建议，这将为研究编队构形的规划技术带来方便。
At last, some conclusions of formation secular evolvements and some advises about formation design are provided, which can be of some help to the study of formation planning.
研究近地轨道卫星编队构形在引力摄动作用下的长期演化机理。
The mechanism of Low earth orbit(LEO) satellite formation secular evolvement under the influence of gravitational perturbations is studied.
在应用直接法和摄动法进行灵敏度分析时，使振动方程与灵敏度方程具有相同的固有特性而产生长期项。
The natural characteristics are the same for vibration and sensitivity equations when direct method and perturbation method are used for sensitivity analysis.
尽管粘弹性本构关系具有时间相依性，其随机摄动格式并不存在“长期项”的影响。
The relations of different random response variables are analyzed and Monte Carlo simulations for viscoelastic stochastic structures are investigated.
尽管粘弹性本构关系具有时间相依性，其随机摄动格式并不存在“长期项”的影响。
The relations of different random response variables are analyzed and Monte Carlo simulations for viscoelastic stochastic structures are investigated.
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