population inversion是什么意思

用法例句

The influences of the main parameters on population inversion including initial population of the ground state, statistical weights ratio of the lower and upper laser levels, ratio of the three body recombination cascade speed and the spontaneons radiative decay speed are calculated and studied by using numerical calculations.

从实现离子的基态和激发态之间粒子数反转的主要参量入手 ,数值计算了基态的粒子数密度、上能级和下能级的统计权重之比、三体复合速率和自发辐射衰减速率之比等每个参量对反转粒子数密度的影响 ,并且以基于光场感生电离 (OFI)复合机制B likeN系统为例对实际系统进行分析讨论 ,给出了实现基于光场感生电离B likeN4 5 。

In this article, taking the capacitor phase-splitting single-phase motor for example, the reversion method of single-phase asynchronous electromtor was introduced.

本文以电容分相式单相异步电动机为例 ,介绍单相异步电动机的反转。

And then the fuzzy neural network was inversed and fuzzified inversion algorithm was proposed.

为有效提高神经网络的分类性能,首先提出了一个可处理模糊输入的模糊神经网络结构,然后由模糊输出和非模糊目标输出定义了代价函数,推导出相应的学习算法,并对该模糊神经网络进行反转,提出了模糊化的反转算法。

The density matrix calculation provides the conditions for probe amplification from different origin, including gain without population inversion in any state basis, gain with population inversion in the dressed-state basis, and gain with population inversion in the bare-state basis.

通过对密度矩阵的计算得到了获得不同形式探测场增益的条件,包括任意态无粒子数反转增益,缀饰态粒子数反转增益,裸态粒子数反转增益。

Characters of reverse tectonics and its forming mechanism in late of fault depression in Songliao basin.;

松辽盆地断陷末期反转构造特征与形成机制

Study the performance of AZ5214E image-reversal photoresist and its uses in lift-off technics;

AZ5214E反转光刻胶的性能研究及其在剥离工艺中的应用

The image-reversal technology using AZ5214E photoresist was studied in detail.

本文重点研究了基于AZ5214E光刻胶图像反转性能的剥离工艺,对图像反转光刻所特有的反转烘、掩模曝光、泛曝光工艺条件进行了详细的对比实验。

Momentum and Reversal in China Stock Market;

中国股市的惯性与反转效应研究

The returns of the groups show the characteristics of reversal with lower institutional investor holding and the momentum with higher institutional investor holding respectively.

本文将股票按照机构投资者持股比例高低分为不同子集,分别研究惯性和反转现象的发生情况。