矢量场

Second, the afterbody of the cuboid is modified step by step in 9 models to model flow wake at rear end and...

文中得出了客车外围流场的速度矢量图和压力分布图以及六个气动力系数，并将最终结果与风洞试验结果进行了比较，结果吻合较好。

This research has studied the validity of vector diffraction field series solution and nonparaxial approximate solution.

本课题研究了矢量衍射场的级数解和非傍轴近似解的有效性。

In this paper it is shown that there are two vector constants of the motion for a charged particle in the central field of force.

证明了带电粒子在有心力场中运动时有两个守恒矢量。

It is an idea from statistical physics to describe continuous physical field coarsely.

态矢量的概念来源于统计物理学，是对连续的物理场进行粗粒化描述的方法。

Hanrahan is limited to unoccluded space. But occluded environment is quite common in real life scene, so the 5D light field model is proposed in this paper to solve this problem, and the 4D light field is a special case of our model.

我们给出了五维光场模型的定义、表示、采样和重采样过程，并针对五维光场模型采样数据量大的缺点，采用了矢量量化压缩方法，以减少存储空间。

Till now, there has not three-dimensional computation of radiation in system with complex geometry and fulled of inhomegeneous, absorpting and emitting medium existed in our country also. The author carries on three-dimensional computation of radiation in vectored nozzle for the first time, which undoubtedly establishes certain basis in this field.

此前我们国内还没有对复杂形状的系统内，不均匀吸收-发射性气体介质的辐射场的三维数值计算，本文率先对矢量喷管的辐射场进行了三维数值计算，为该领域的研究奠定了一定的基础。

Based on numerical simulation flow after treatment methods and implementation. This paper drawing river ice jam thickness contour map, vertical water flow under the ice jam contour map as an example, the use of Surfer software described in detail various graphics rendering; Focused on the Surfer with VB programming software secondary development to achieve flow numerical simulation after treatment, showed that automatic change the data files to the Surfers;Introduced Active automation technology and Visual Basic Application Program Interface, and the interface technology will combinate VB powerful software development capabilities and Surfer software powerful mapping functions , achieve the key code and the mapping results map examples: under the ice sheet flow velocity field vertical contour map, three-dimensional wire-frame plans, such as flow field vector graphics, and dynamic display and output the graphics.

基于水流数值模拟后处理的方法与实现，本文以绘制河流冰塞厚度等值线图、冰塞下水流纵向流速等值线图为例，详细介绍了运用Surfer软件绘制各种图形的方法；重点阐述了用VB编程对Surfer软件进行二次开发实现水流数值模拟后处理，显示向Surfer数据文件自动转换的过程；介绍了Active自动化技术及其与VB应用程序的接口技术，并利用该接口技术将VB的强大软件开发能力和Surfer软件强大的绘图功能相结合，给出了实现该接口技术的关键代码以及绘制成果图件的实例：冰盖下流速场纵向流速等值线图、三维线框图、流场矢量图等图形，并输出图形与动态显示。

Main work of this text:First, in view of the use widespread some type parameter cage control valve, use the three-dimensional modeling software to establishment valve interior flow field model, through CFD preprocessor production computation grid, using CFD software to separate solve, may obtain the regulating valve interior flow field the visible graph, like pressure and velocity vectors chart, contour map and so on.

本文主要工作：一、针对使用广泛的某一类型参数的套筒型调节阀，应用三维建模软件建立阀门内部流场模型，通过CFD前处理器生成计算网格，应用CFD软件进行离散求解，可以得到调节阀内部流场的可视化图形，如压力、速度等矢量图，等值线图等。

Using this method, the effect of the PM-PCF structure on the optical characteristic parameters, including modal field diameters,effective refractive index of space-filling mode, normalized frequency, mode field and single-polarization single-mode region etc., are studied systemly.

在第三章，通过全矢量有限元分析方法详细地分析了保偏光子晶体光纤结构参数对光子晶体光纤的光学特性影响，包括对单偏振单模光子晶体光纤的模场直径、基空间填充模的有效折射率、归一化频率、模场分布、单偏振单模区域等一系列光学特性参数进行了分析。

Flow characteristics of flow field in the header of platefin heat exchanger were investigated by means of particle image velocimetry and a series of velocity vector and streamline graphs of different crosssections before and after the header improvement were achieved.

利用Particle Image Velocimetry粒子图像测速仪对板翅式换热器入口结构改进前后的流场进行了实验测试，获得了入口结构内部不同剖面处的流场速度矢量和流线分布图。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。