查询词典 nocturnal emission

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。

The polycrystalline or amorphic diamond thin films may have three ways of field emission:"antenna effect", the emission site of quasi-n-type and low work function, the field emission of graphite particles.

多晶或非晶金刚石薄膜可能存在三种场发射方式：&天线效应&，准n型低功函数发射点和石墨微粒场发射。

Using the static chamber and Chromatograph method, H2S and COS emission from the marsh meadow Calamagrostis angustifolia and typical meadow Calamagrostis angustifolia were measured during growth season (5-9 month). the results showed that the seasonal and diurnal variations of H2S and COS emission were both obvious, the mean emission of H2S and COS from the marsh meadow Calamagrostis angustifolia were 0.34μg?

利用静态箱／气相色谱法，观测了小叶章沼泽化草甸和小叶章典型草甸两种湿地类型中H2S和COS在生长季（5-9月）的释放动态，结果表明：在两种小叶章湿地中，H2S和COS的排放通量均具有明显的季节和日变化规律。

The emission of N_2 in discharge gap is detected using optical emission spectrophy. The discharge reactor was put in lightproof box to avoid the disturbance from outside lights. A small hole was drilled in one sidewall of the box, and the fibre was mounted coupling to the inlet (1mm) into the hole. A tube with the inner diameter of 1.1mm was set in the front of the hole. In this way, only the light from a certain direction emitted from the discharge reactor could transfer into the inlet through the tube. The reactor could be moved in the vertical direction of the fibre, and the spectrometry can collect the total emission along the fibre inlet in single-shot measurement.

利用光学发射光谱仪对多针对板电晕放电中放电间隙内的N_2发射光谱进行测量，放电反应器置于暗箱中以避免外界对光谱测量的影响，将光谱仪的光纤耦合入口固定在暗箱侧壁的小孔内，小孔孔径为光纤耦合入口直径，在小孔前方安装孔径为1.1mm的细直管，只采集与光纤耦合入口在同一直线上的发光，避免放电区其它区域的发光被同时接收。

The field emission current that STM is operated in field emission mode was calculated by simulation charge method. The calculated results take account of planar and nonplanar emission models respectively. These data are helpful to know the character of STM.

论文对STM的工作原理进行了理论分析，采用模拟电荷法计算了STM工作在场发射状态下，平面和非平面尖端模型时的电流、电流密度分布和电场分布，为进一步认识STM的工作特性提供了数据。

From this point of view, we investigate the effect of the curvature energy and the compressibility energy on the emission of the prescission particle. The effect, acting together with the other one that the lower emission barrier facilitates the particle emission, leads to a different way to emit proton and α particle.

从这个角度，笔者研究了引入曲率能和压缩能影响断前粒子发射的效应，与发射位垒降低增强断前粒子发射的效应相作用，使断前质子和断前α粒子在基态到鞍点间出现了不同的发射规律。

Unoriented ZnO nanowires are fabricated either on the surface of silicon wafer or at the tip of needle-like tungsten by vapor-phase deposition. Both the plane field emission and tip field emission of ZnO nanowires are studied using a field emission microscope.

运用气相沉积方法分别在硅片表面和钨针尖上制备了非取向生长的ZnO纳米线，并通过场发射显微镜研究了纳米线样品的平面场发射特性和针尖场发射特性。

On the optical emission part, I utilized Photoluminescence to investigate the emission wavelength. In the first section of my experiments, Indium-OxyNitride nanoparticles, they are octahedrons suggested to be formed via the VS mechanism dispersed on the Silicon substrate, ranging from 50 nm to 1 um in size grown from 600 degrees to 900 degrees in Celsius. The composition is also verified by the EDS apparently. The PL shows the emission wavelength spans the whole red region.

在第一部分的氧化氮铟奈米颗粒中，奈米颗粒推测是以VS的成长机制形成的八面体结构，以成长温度在摄氏600度至900度形成各个尺寸从50奈米至1微米间的奈米颗粒，并可在能量散布光谱中，验证此奈米结构的存在成分，并在光激发萤光光谱中，可以看出此奈米颗粒的发光范围可以涵盖整个红光波段。

5Ns. The peak position of N band emission as well as the distinct emission region slightly moves towards the open end of the cylindrical cavity, and this does not happen to O band emission. Radiation transport efficiency of 6% is obtained for the φ400×1200um cylindrical cavity heated by x-ray source with radiation temperature of 118 eV.

从时间分辨的X光强度轴向空间分布来看，在较长时间（约1～1.5ns）内，O带X光在整个观测缝对应的轴向范围之内均有较大的辐射强度，在X光强度空间分布的变化过程中，其强度峰值的空间位置基本不变；而对N带X光，则只在较短时间（约0.5ns）内，在整个观测缝对应的轴向范围之内可观测到X光辐射，但只在靠近输运源约300μm的范围内有较强发射，在柱腔末端600～700μm范围之内的辐射则很弱，N带X光辐射轴向空间分布曲线的峰值位置在朝柱腔末端的方向移动，移动量大约为130～250μm。

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。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。