计算公式简单、明了，且可得到任意价误差的微扰近似公式。
The formulae for the calculation are very simple and can be used for finding errors of any order.
跃迁的玻尔条件和光电效应的爱因斯坦定律都是微扰近似的结果，在强激光引起的跃迁中不成立。
The Bohr condition for quantum transitions and the Einstein law for photo-electric effects are approximate results of perturbation. They are violated in the transitions induced by intense lasers.
采用可变长度单摆的力学模型对秋千振荡给出初等分析，采用微扰近似法导出了秋千的非线性参数共振解析解，并进行了讨论。
A variable length simple pendulum model is introduced, elementary analysis and perturbation analytic solution of nonlinear differential equation for parametric resonance are presented.
认为电场中带电谐振子用定态微扰的方法不仅可以求近似解，也可找到其精确解。
Point that we not only find the approximate solution by using the perturbation method, but also can find the precise solution.
本文利用微扰法，导出了克尔型非线性对称平板光波导t E模传播常数的近似计算公式。
A perturbation method has been developed to derive the approximate computing formulae of propagation constants for te modes on Kerr-type nonlinear symmetric slab optical waveguides.
利用直接微扰法，给出了该系统的一级近似波函数及能谱随时间的演化规律。
This model is solved by applying the direct perturbation method. The time evolution of spectrum and the first order approximate wave function for the system are presented.
通常利用量子力学的时间微扰法可求得这类方程一次近似解的黄金定律。
Usually these equations can be solved using the method of perturbation approximation in quantum mechanics.
通常利用量子力学的时间微扰法可求得这类方程一次近似解的黄金定律。
Usually these equations can be solved using the method of perturbation approximation in quantum mechanics.
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