建立了射孔段套管弹性抗挤性能分析控制一般方程，并采用摄动理论给出了的孔段套管弹性抗挤能力降低系数一般计算公式。
This paper gives the elastic differential equation of collapse of perforated casing, and a general formula for reduction factor of elastic collapsing by perturbation method.
给出快速计算卫星球谐摄动和地球引力系数递推关系式的一个新方法。
A new method of fast computing the spherical harmonic perturbation on satellites and the recurrence relations of the coefficients of the Earth's gravity are given.
本文还讨论了与区间多项式稳定性相关的一个重要问题，即稳定多项式系数的最大摄动量问题，给出三种分析方法。
The perturbation ranges of the coefficients of Hurwitz polynomials, which is related to interval polynomial stability, are discussed, and three analysis methods are proposed.
采用非结构三角形网格的有限元法求解压强摄动方程，并计算气膜刚度系数和阻尼系数。
The solution of perturbation pressure is used to calculate air bearing's stiffness and damping coefficients.
本文用摄动方法求解热传导系数是温度的线性函数的非线定常温度场问题。
In this paper the nonlinear stable temperature field problem, in which the conductivity is a linear function of temperature, has been solved by using the perturbation technique.
摄动理论显示，对于特征方程系数的小幅度扰动即可导致根的大幅度变化。
Perturbation theory indicates that small perturbation of the coefficients could lead to the big perturbation of the root.
运用摄动方法，给出了速度势的四阶近似，然后得到了圆柱表面的无量纲的压力系数和阻力系数。
Using the perturbation method we have got the fourth order of approximation of the velocity potential to the problem.
运用摄动方法，给出了速度势的四阶近似，然后得到了圆柱表面的无量纲的压力系数和阻力系数。
Using the perturbation method we have got the fourth order of approximation of the velocity potential to the problem.
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