The second class methods mainly bases on elasticity undulatory theory through simulation or reversal development method forecast multiple and then match it with the original data .

第二类主要是基于弹性 波动 理论的方法，通过模拟或反演方法来预测原始数据中多次 波，继而从原始数据中匹配 减去所预测的 多次 波。

Further the equilibrium equations of the undulatory fin were obtained by applying the membrane theory of thin shells which took into account the geometrical non-linearity of the structure .

进而，从弹性薄壳 理论 出发，考虑 柔性 长 鳍结构的几何非线性，并引入无矩薄壳 理论 的 假定，建立了 柔性 长 鳍 波动的平衡方程。

From R. descartes R. Hooke and pardies to C. Huygens : development of Huygens undulatory theory

从R.笛卡儿、R.胡克和帕蒂到C.惠更斯：惠更斯 波动 理论的发展

A judgement experiment for undulatory theory of light

光的 波动 说判定性实验

In the foundation of cycle undulatory theory the booming theory founded the booming index using it to monitor the influence of macroscopic economy by cyclical undulation .

而景气理论则是在周期 波动 理论的基础上，构建景气指数来监测宏观经济受经济周期波动的影响。