The asymptotic solutions composed of finite terms of elementary functions are obtained by regular perturbation method.
采用正则摄动法，求出了由有限项初等函数所构成的渐近解。
A new asymptotic numerical method for nonlinear dynamic equations was proposed. In this method, the homotopy perturbation method was improved by using the precise integration technique.
利用精细积分技术对同伦摄动方法进行了改进，构造了一种求解非线性动力学方程的新的渐近数值方法。
A class of ENSO perturbed model is studied. Using the perturbation theory and method, the asymptotic expansions of solution of corresponding problem are constructed.
研究了一类ENSO摄动模型。利用摄动理论和方法，构造了相应问题的渐近展开式。
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