此方法能改善微扰计算处理，有利于讨论解的时间行为，并得到某些新的结果。
This method can improve that of perturbation calculation, benefit discussing time behavior of solution, and get some new results.
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.
最近发现，通过直接微扰法可以得到一类微扰作用下的混沌系统的形式解。
The direct perturbation technique, proposed recently, successfully deals with a kind of perturbed chaotic system and obtains their formal solutions for each order.
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