速度分布

To research into the distribution of laser spot on the sea surface of airborne laser bathymetric system, to obtain the relationship between its spacing and scan mode, scan driver rate, laser frequency and plane speed, and to optimize its distribution are important.

通过对激光测深仪的激光海面入射点分布的研究，得到了其疏密程度与扫描方式、扫描电机转速、激光器重复频率和飞机飞行速度等参量之间的关系，并对激光海面入射点分布进行了优化设计。

The collector in dynatron of smooth Ou photosensitive or blast off extremely direct receive laden resistor to be able to satisfy lesser laden requirement; to be in of dynatron of smooth Ou photosensitive blast off extremely add dynatron enlarge drive, the push-pull type circuit that through two photoelectricity coupler makes and feedbacking through increasing photosensitive dynatron base, reach stronger laden capacity already, increased the interference rejection capacity of power interface, the outputs power inadequacy weakness that overcame smooth Ou, raise the switch rate of smooth Ou again, overcame the distributinging capacitance as a result of existence of smooth Ou oneself, cause an effect to transmitting speed.

在光耦光敏三极管的集电极或发射极直接接负载电阻即可满足较小的负载要求；在光耦光敏三极管的发射极加三极管放大驱动，通过两只光电耦合器构成的推挽式电路以及通过增加光敏三极管基极正反馈，既达到较强的负载能力，提高了功率接口的抗干扰能力，克服了光耦的输出功率不足的缺点，又提高光耦的开关速度，克服了由于光耦自身存在的分布电容，对传输速度造成影响。

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。

The transport and current-voltage properties of submicron GaAs MESFET device are calculated firstly based on the nonparabolic effective mass energy band model and Monte Carlo method which includes all major scattering mechanisms. The electron drift velocity, electric field and the non-homogeneity of mobility distribution in device are obtained. The influences of different gate lengths to electron drift velocity and drain current are analyzed.

根据对以GaAs、GaP和InP为主的Ⅲ-V族化合物半导体材料的能带结构和散射机制的分析，采用蒙特卡罗模拟方法，研究了亚微米尺寸的OaAs MESFET器件的电子密度分布、电场强度、漂移速度和迁移率分布等输运性质，以及栅长对器件性质的影响和电流电压特性。

Because the coupling condition of NNGFM arises from the net current continuity imposed at the volume element interfaces, the relatively complex conversion formulation for partial current continuity condition of NGFM is unnecessary when applying G. E. T., and computation time is saved. The coefficient matrix of the coupled equations is tridiagonal, so it can be solved by forward elimination and backward substitution method.

NNGFM的基准校验及在大庆200MW核供热堆(NHR-200)上的应用表明，NNGFM计算精度和速度与第三类边界条件格林函数节块法NGFM〓相当，在相同精度下速度比CITATION能快1000倍；NNGFM给出的本征值、功率分布较NNGFM误差能减少一半以上，为更精确计算工作期、卡棒当量提供了条件。

In this paper, the effects of factors like flotation、cooling velocity on distribution and microstructure of the material were studied under the condition of unidirectional and multidi〓tional solidification, an order of magnitude analysis was performad in order to understand the dynamics of an advancing solid/liquid interface behind a particle as well as the behavior of the particle in front of the interface, and a model of critical velocity for the pushing/engulfment transition of particles by the interface was built, the theoretic result gave a good explain to experimental one.

本文考察了在常规铸造和定向凝固条件下，浮力、冷却速度等因素对SiC颗粒分布以及材料组织的影响，分析了颗粒在凝固过程中的行为以及对界面的作用，建立了在胞状树枝晶凝固条件下枝晶对颗粒的推移/吞并临界速度模型，理论分析和实验结果基本一致。

Used turbulent flows model,methane/air half-particular chemistry mechanism and laminar flamelet model couple to calculate,and work out that excessive air coefficient is 1.2 and 1.4,where velocity in firebox and mixture,temperature and component in radial.The result indicated...

利用湍流流动模型、甲烷/空气半详细化学反应机理和小火焰模型耦合求解，分别计算出过量空气系数为1.2和1.4的速度在燃烧室内的分布状况以及混合分数、温度和组分的径向分布，模拟结果表明小火焰模型能够用来描述燃烧室内燃烧机理。

In this thesis, we analyze the principles and structure of several kinds of practical light distribution measurement systems for lamps and luminaires, and give a design of a Fast Light Distribution System with 37 detectors array arranged in a hemicycle.

论文首先分析了目前常用的几种灯具分布光度测试系统的原理和结构，提出了采用多个探头的快速空间分布光度测试系统方案，该方案通过利用一个排成半圆形的探测器阵列，多探头同时测量，从而大大提高了测量速度。

A b distribution function is proposed to replace the homogeneous distribution function in the particle optimal algorithm. It use a dynamic method to adjust the parameters of b distribution random function to improve the speed and quality of the feasible solution.

提出使用b分布函数来代替均匀分布函数的粒子群优化算法，在产生可行解的过程和迭代过程中动态地调整β随机函数的参数，以提高产生可行解的速度和质量。

For example, how to confirm the point and shape of treatment with ultrasound, how to make sure the ultrasonic indorse in the process of treatment, how to choose the best way of scanning and the distribution of ultrasonic focus, how to calculate the temperature distribution of treatment area, how to optimize the heat way and compare theoretical result with experimental result.

这方面的问题涉及：治疗靶区解剖位置和几何形状的确定、治疗热剂量的确定、最佳声焦点分布或最佳扫描路线和扫描速度选取、治疗区域温度分布计算、热区计算结果与预定加热指标的比较和加热方法的优化。

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。