用严格的分波法求解方程并进行计算。
一部分波从所遇到的物体反射回来，形成一种信号，称为回波信号。
A portion of the waves is there reflected from the object encountered and forms what is referred to as the echo signal.
应用分波展开法，通过电离态上的粒子布居，研究了电离相干现象。
The phenomenon of ionization interference is studied with partial-wave expansion method through the particle population of the ionized state.
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