查询词典 densities

Secondly, the spatial distribution of transport properties of GaP and InP bulks, including electric fields, drift velocities and mobility, are calculated at different applied voltages and an overshoot phenomena in the electron densities and drift velocities of the GaP and InP bulks under the high electric field was found.

同时计算了GaP和InP体材料输运性质，分析了它们的电场强度、漂移速度和迁移率在不同偏置电压下的空间分布，以及电子密度和漂移速度在高电场下的过冲现象。

Epilimnion In a stratified lake (a lake in which there are distinct layers of different temperature densities), the upper layer of warm water.

浅表层：在一个层结湖中（具有明显不同温度密度分层的湖泊），温水层的最上层被称为浅表层。

Solubilities and densities in solution of the system were determined experimentally. The equilibrium phase diagram and the density-composition diagram of the quaternary system were plotted using experimental data.

依据实验测定的平衡溶解度数据及对应的平衡固相，绘制了该四元体系的平衡相图以及其密度－组成图。

The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.

具体工作可以概括如下：首先，研究了VCSEL的热场特性，分析了电流扩展，材料参数和工作条件对于温度分布的影响；其次，从电极电压入手，计算出激光器中的等势线分布，并对不同深度处的电压和电流分布进行比较，研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响；再次，实现了电、光、热耦合，求出了阈值电压，计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布，分析了温度和载流子浓度变化对折射率、费米能级和光场的影响；最后，给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布，分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。

Densities of over 1 million per square meter have been recorded in parts of Lake Erie!

最高密度的记录是在伊利湖的每平方米超过1百万个。

Photoresponse characteristics of Pr0.7Ca0.3MnO3 thin films were investigated under different applied voltages and excitation light energy densities at room temperature.

在室温下利用波长532nm，脉冲宽度7ns的纳秒脉冲激光研究了不同电压和激光能量密度作用下Pr0.7Ca0.3MnO3薄膜的瞬态光响应特性。

Results Giant cell tumor of long bone occurred commonly in distal end of femurs and the proximal end of tibias,its characteristic was eccentric,expansile and bony destruction,most of which had irregular sclerotic rim,the densities within the bony destructions were usually heterogeneous,some cases'bony cortex was destructed,accompanied by soft tissue swollen masses.

而长骨骨巨细胞瘤的发病率则明显高于其他部位，本文收集经手术及病理证实的长骨骨巨细胞瘤32例，回顾性分析其CT表现，以加深对本病的认识及提高对长骨骨巨细胞瘤的诊断和鉴别诊断能力。1资料与方法1.1一般资料本组32例，男17例，女15例；年龄18~70岁，平均33岁，其中18岁2例，20~40岁26例，41~70岁4例。

The allelopathy of different densities of soybean root exudates on 4 main crops was studied.

选择不同浓度的大豆根系分泌物，研究其对4种主要农作物的化感作用。

The production rates of ferrate increase with increasing concentrations of NaOH solutions, current densities and temperatures.

2在相同电解时间下，高铁酸钠的表观生成速率均随着NaOH溶液浓度、操作电流密度、体系温度的增大而增大。

Methods Ropivacaine with different densities is used for obervations on the patient's life sign,pains,movement block,cervix flaccidity and the period of time of the patient's being away from the hospital.

用不同浓度的罗比卡因在门诊人流术中行骶管阻滞以观察其对流产者的生命体征、疼痛程度、运动阻滞、宫颈松弛度及离院时间的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。