In this paper, we discussed the transition selection rule of electrical dipole radiation in atom physics by the parity theory and angular momentum theory in quantum.
本文利用量子力学的宇称理论和角动量理论，对原子物理学中所熟知的电偶极辐射的跃迁选择定则进行了理论探讨。
The transmission and attenuation rule of the radar pulse wave in different dielectric are analyzed by analyzing the electrical properties of the geotechnical dielectric.
通过对岩土介质的介电特性分析，分析雷达波在不同岩层中的传播与衰减规律。
The change rule of the contact pressure, nucleation process and character were investigated by the coupled thermal-electrical-mechanical analysis.
通过结构、热电场的全耦合，分析了焊接过程中接触面压力变化规律，单边焊熔核形成过程以及形核特点等。
The new solder thermal conductivity and electrical conductivity have a similar variation rule.
新型焊料的导热性与导电性有相似的变化规律。
At the same time, combines to the transmission coefficient among different voltage classes, through a series of simulations, does researches on the flicker transmission rule in the electrical network.
同时，结合闪变在不同电压等级间的传递系数理论，通过一系列的仿真，研究闪变在电网中的传递规律。
At the same time, combines to the transmission coefficient among different voltage classes, through a series of simulations, does researches on the flicker transmission rule in the electrical network.
同时，结合闪变在不同电压等级间的传递系数理论，通过一系列的仿真，研究闪变在电网中的传递规律。
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