查询词典 emission theory

A novel Er3+-doped tellurite glass with compositions of TeO2-ZnO-Na2O-Bi2O3 was prepared, and the intensity parameters, spontaneous emission probability, absorption and emission cross-section of Er3+ ions were calculated according to the Judd-Ofelt and McCumber theory.

研制了一种新型掺铒碲酸盐玻璃TeO2-ZnO-Na2O-Bi2O3，利用Judd-Ofelt和McCumber理论计算了Er3+离子的强度参数、自发辐射几率、吸收截面和发射截面等光谱参数。

His other contributions include relativistic cosmology, capillary action, critical opalescence, classical problems of statistical mechanics and their application to quantum theory, an explanation of the Brownian movement of molecules, atomic transition probabilities, the quantum theory of a monatomic gas, thermal properties of light with low radiation density (which laid the foundation for the photon theory), a theory of radiation including stimulated emission, the conception of a unified field theory, and the geometrization of physics.

的经典问题和它们的量子理论的应用，解释了布朗分子运动，原子跃进概率，单原子气体的量子论，地辐射密度的光的热性质，包括受激发射的放射理论，统一场论的概念和物力几何化。爱因斯坦写了多于50篇的科学著作，也包括非科学的书。1999年爱因斯坦被时代杂志封为"世纪人物"，一份有卓越成就的物理学家的民意测验封他为无论何时都是最伟大的物理学家。现代文化认为"爱因斯坦"和天才是同一个意思。

This paper,by applying the theory of probability statistics,explains the relationship between the emission current I and the interelectrode voltage U in the thermoelectron emission phenomene,and then gives the expression of their relationship:I=ImΦ.

本文应用概率统计的理论对热电子发射现象中发射电流 I和两极间电压 U之间的关系进行了解释，得出它们的关系是： I=ImΦ，并给出关于参数 Im、 a、 b的确定方法。

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征，并取得如下结果：利用速率方程理论讨论了激光器激射阈值的特性，分析了阈值与腔体积和自发发射耦合系数β之间的关系；讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性；光子阱结构在其归一化厚度在0.15-0.5之间时，几乎全部自发发射进入到最低阶TE模式中；研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺；利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器；直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW，是目前所见文献报导中比较低的；直径2μm的微碟连续光泵浦激射阈值仅几μW，目前尚未见到达到类似结果的研究报导；为解决微碟激光器激射光定向引出的问题，通过波导耦合模理论分析了双层碟之间功率耦合效率；据此设计了新型带耦合输出波导的电泵浦微腔激光器，为进一步研制可实用的电泵浦微腔激光器打下基础。

Firstly, this article summarizes energy conservation and emission reduction and the related theory, then takes the current energy consumption and pollution status of China's economic development as the starting point, analyzes the situation of energy conservation and emission reduction, poses the problem of energy conservation and emission reduction in our country.

本文首先概述了节能减排及相关理论，从我国经济发展的能耗现状和污染现状出发，分析我国节能减排的形势，提出了我国节能减排面临的问题，其次分析节能减排与企业竞争力的关系，以及节能减排规制政策下企业面临的挑战和机遇，最后对企业对策进行深入分析。

In this paper, different coal face 3801 in a mine gas emission time is based on gray theory of gas emission prediction method, a mine gas emission in GM (1, 1) prediction model made its prediction of gas emission, by making the residual test, the results show that the prediction accuracy can be predicted.

本文以某矿3801采煤工作面不同时间段瓦斯涌出量为依据，运用灰色理论提出了瓦斯涌出量的预测方法，建立了矿井瓦斯涌出量的GM(1 ，1)预测模型，并对其进行了瓦斯涌出量的预测，通过进行残差检验，结果表明预测精度高，可以进行预测。

Basing on the mechanism of the kinetic electron emission, we analyze the factors which relate to the kinetic emission yield, and finally get the relation between kinetic electron emission and impacting velocity in theory.

基于动能电子发射的机理，我们分析了影响动能电子产额的因素，理论上得出动能电子产额与入射速度增长呈线性增加的关系，取得了实验上和理论上一致的结果。

By analyzing the electron emission waveforms, the natural parameters of the ferroelectric electron emission and the theory of the electron emission have been generalized.

其中，对BT、BNBT两种环保无铅铁电材料电子发射性能的详细研究，并公开报道了其最大发射电流密度分别为30A/cm~2、20A/cm~2，这在国际上尚属首次。

Based on the theory of thermal emission polarization and the method of thermal emission polarization detection, the relation between the surface roughness of aluminum and steel plates and their degree of linear polarization of the thermal emission was studied by using a kind of thermal imaging polarimeter.

中国科学院安徽光学精密机械研究所遥感研究室，合肥 230031根据热红外偏振的原理和探测方法，利用一种热红外偏振探测系统分别研究了铝质和钢质金属板热红外偏振度和其表面粗糙度之间的关系。

His other contributions include relativistic cosmology, capillary action, critical opalescence, classical problems of statistical mechanics and their application to quantum theory, an explanation of the Brownian movement of molecules, atomic transition probabilities, the quantum theory of a monatomic gas, thermal properties of light with low radiation density (which laid the foundation for the photon theory), a theory of radiation including stimulated emission, the conception of a unified field theory, and the geometrization of physics.

的经典问题和它们的量子理论的应用，解释了布朗分子运动，原子跃进概率，单原子气体的量子论，地辐射密度的光的热性质，包括受激发射的放射理论，统一场论的概念和物力几何化。爱因斯坦写了多于50篇的科学著作，也包括非科学的书。1999年爱因斯坦被时代杂志封为&世纪人物&，一份有卓越成就的物理学家的民意测验封他为无论何时都是最伟大的物理学家。现代文化认为&爱因斯坦&和天才是同一个意思。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。