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。
A computer program is given for log-periodic dipole antenna (LPDA) design with the "Three-Term" theory. The program can quickly design and optimize physical or electrical parameters of LPDA.
本文给出了用“三项理论”设计对数周期偶极天线(以下简称LPDA)的计算机程序，它能快速地设计出该天线的各几何参数和电参数，并可进行优化。
An analytical expression of potential field is derived based on a viewpoint of polarized dipole and electrical current.
导出了基于极化偶极和电流观点的位场解析表达式。
First this paper introduced the fundamental principle of antenna, such as dipole, fundamental electrical parameter, principle of antenna array, theory of space propagation, etc.
本文首先介绍了对称振子，天线基本电参数，天线阵原理，空间波传播理论等天线基本原理。
This paper deals with the algorithms of equivalent dipole approximation and cubic interpolation for the electric field component of ground electrical bipole source.
基于偶极—偶极电极装置的瞬变响应表达式，建立了双极源电场的等效偶极和三次插值的快速近似算法。
This paper deals with the algorithms of equivalent dipole approximation and cubic interpolation for the electric field component of ground electrical bipole source.
基于偶极—偶极电极装置的瞬变响应表达式，建立了双极源电场的等效偶极和三次插值的快速近似算法。
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