zero-order approximation 中文意思是什麼
zero-order approximation
解釋
零級近似- zero : n （pl zeros zeroes）1 【數學】零；零號。2 零位；零點，起點；（溫度表的）零度，冰點；座標原點；無...
- order : n 1 次序，順序；整齊；（社會）秩序，治安；狀況，常態；健康狀態；條理；會場秩序；議事程序，日程；...
- approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
-
In connection with the researches carried out in our laboratory, the description is concentrated on the high accurate four - component relativistic density functional methods with relativistic effects taken into account strictly, and the two - component or scalar relativistic density functional methods with relativistic effects considered approximately, involving the zero - order regular approximation ( zora ) method and its improved variants, the singularity excluded approximate expansion ( seax ) method, and the jointed two component - scalar relativistic ( or non - relativistic ) approach applicable to the calculations of large systems locally containing heavy elements
結合本實驗室的研究工作，重點介紹嚴格處理相對論效應的四分量相對論密度泛函計算方法和近似處理相對論效應的兩分量和標量相對論密度泛函計算方法，包括零級規則展開近似（ zora ）方法及其改進和排除奇點的近似展開（ seax ）方法，以及適合處理局部包含重元素大體系的接合兩分量標量相對論（或非相對論）計算方法。 -
In this paper, we prove that for a three - level atom in a circularly polarized electromagnetic wave, there is a coherent superposed state of its two states such that when the atom is initially in the state, under the zero - order approximation, the atom is always in the state hereafter, while the occupation probabilities that the atom is in other states are zero ; under the first - order approximation, the atom is nearly in the state, while the occupation probabilities that the atom is in other states near zero
本文證明：對圓極化光中的三能級原子，存在著由它其中的兩個態構造的一個特殊的相干疊加態，當原子最初處于這個態時，它以後將總是幾乎處于這個態，而原子處于其他態的概率接近於零。
分享友人