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。
However, the selection criteria of the transition point needs to be further studied and optimized.
然而，转变点的标准的选取和优化还要进一步的研究。
The theoretical calculation value of some common transition fit is compared with practical statistical value, which is of practically reference to the accuracy selection in mechanical design.
并对几种常用过渡配合的理论计算值及实际统计值作比较，这对于机械设计中的精度选择有实际参考意义。
The paper describes a brief deduction to have the parity selection Rules of Quanta Transition, Spin Selection Rules and other Selection Rules about Symmetric kinds by the method of Group Theory.
用群论的方法，较简练地推断出量子跃迁的宇称选择定则，自旋选择定则，与对称类型有关的选择定则等。
By employing panel data, we are able to control the selection biases of restructuring and handle the problem of missing variables, which are frequent in transition economic literature.
利用面板数据，解决了转型经济文献中经常遇到的遗漏变量和选择性偏差问题。
The notion of random selection is extended to random harmonious average of random transition probability for nonehomgenous Markov chains by using a new method of differentiation on net.
利用网微分方法将随机选择的概念，推广到有限马氏链随机转移概率随机调和平均的情形。
The main contribution of gene duplication is providing materials for mutation, transition and selection, and furthermore, a probability for genetic evolution.
基因重复的最主要贡献是在进化过程中为基因突变和正向选择提供遗传材料，为基因的进化提供可能性。
The theory of information transition and agency cost argues that debt and dividend in incentive contract can mitigate adverse selection and moral hazard, and can be replaced by each other.
信息传递理论和代理成本理论认为，在激励契约中，负债和现金股利可以相互替代，但是现实中负债与现金股利却共存于激励契约。
Welding material selection of transition layer refers to the following table.
过渡层焊接材料的挑选参睹上里。
Welding material selection of transition layer refers to the following table.
过渡层焊接材料的挑选参睹上里。
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