In this paper, the control of the atomic spontaneous emission is discussed by using the relative phase difference of the polychromatic field and certain results are obtained.

本文对利用多色场的相对相位控制原子的自发辐射问题进行了讨论，并得到了一定的结论。

youdao

Phase control of free-free transitions in bichromatic laser field is investigated employing the Born approximation.

本文利用玻恩近似理论对双模激光场中自由 -自由跃迁过程中的相位影响进行了初步研究 。

youdao

At present, in the field of power electronics applications, most of the drive systems of AC motors use diode rectifiers and phase-control thyristor rectifiers.

目前电力电子应用领域中，绝大多数的交流电动机驱动逆变器前级都采用了二极管整流器或晶闸管相控整流器。

youdao