矢量场

The theory of function approximation is used to establish the transient model of thrust vectoring with the data calculated.

利用该程序计算了某矢量喷管在不同的压比、面积比和几何偏转角下的200多种三维有粘流场，获得了矢量喷管的性能数据。

The far-field analytical expressions for the electromagnetic fields of a cylindrically polarized vector beam propagating in free space are obtained based on the vector angular spectrum and the method of stationary phase.

基于矢量角光谱法与静态位相方法，推导出了矢量圆柱偏振光束在自由空间传输的电磁场的远场解析表达式。

In this thesis, molecular electronegative distance vector and 3D holographic vector of atomic interaction field (3D-HoVAIF) are applied and extended, the former is based on the 2D information of molecular structure, the latter is based on the 3D information of molecular structure.

本文在实验室已有的良好基础上，应用和发展了基于分子二维结构信息的系列分子电性距离矢量和基于分子三维结构信息的三维原子场全息作用矢量(3D-HoVAIF)。

Color image sequence is presented by multivectors in geometric algebra,it is proved that if meet the constrained conditions for color optical flow analysis,a multivector instead of multichannel image processing method can be used to represent the continued distribution of images to expand the measurement range.

在几何代数域内对彩色图像序列用多重矢量表示，证明了彩色光流场分析时进行约束条件时的测量问题，通过多重矢量而非多通道的图像处理方法来表示图像连续特性，从而扩大了测量范围；然后依据物体色彩在运动过程中保持不变的原理，在几何代数域内推导了彩色图像序列的光流约束方程及其解法。

In this thesis, the studies as follows:(1) The axis and radial flow field distribution of CFB were analyzed by the particle flow visualization software, and the criterion of turbulence to circulation fluidization situation was reported.

本文以管式布风条件下流化床内流动特征为研究对象，主要研究内容如下：(1)通过开发的颗粒流场可视化软件，对循环流化床内轴径向的流场进行了分析。在循环流化床试验台上分段测量了全场颗粒矢量速度，得到了循环床上升段内的整个流场分布。

The hybrid method first calculates the scattered fields of the Luneburg lens using the spherical vector wave method. Then it transforms the calculated results into the radiation fields in the far region using the reciprocity theorem.

该方法首先用矢量球面波理论计算平面波入射到多层介质球的散射场，在此基础上，用互易原理将散射场转变成天线的远区辐射场。

This theory makes direct use of the electric and magnetic field as unknowns, thus yielding uniquely defined vectors in combination with a suitable grid definition.

该理论直接以电场强度和磁感应强度为未知量，采用两套互相正交的网格，将场矢量离散为不同网格点上的一系列分量，将矢量积分方程转化为一组线性方程组。

In this paper a two-dimension square model of convection heat transfer is adopted and Field Coordination Equation is verified by comparing the heat transfer efficiency of optimal velocity filed and other flow fields.

过增元11，2指出速度矢量与热流之间的夹角是影响对流换热整体性能的一个重要因素，并阐述了对流换热场协同的基本概念：对流换热强化要求速度场和温度场之间相互协同，即彼此存在着最为合理的空间分布。

Secondly, 4 methods of azimuth estimation based on vector hydrophone according to forms of nosie and signal are brought forward. The principles of these 4methods are set forth, simulating them by computer. Acoustic intensity averager can effectively suppress isotropic non-coherent interference; DOA based on line-spectra can effectively detect the target radiating line-spectra and estimate its azimuth angle; Bar graph approach can suppress line-spectra coherent interference and distinguish different targets radiating line-spectrum. Weighted bargraph approach can detect target in broadband coherent interference and estimate its azimuth angle.

其次，根据背景干扰和信号样式的不同，提出了单矢量水听器方位估计的4种方法；阐述了这4种方法的原理，并进行了计算机仿真，指出平均声强器方位估计适用于各向同性噪声场背景干扰，讨论了平均声强器的处理增益；目标辐射噪声中有线谱时，线谱方位估计有很好的性能，其中的LOFAR线谱和高频解调得到的DEMON线谱都是目标的特征谱线，可以利用它们进行方位估计，详细讨论了利用特征线谱单个矢量水听器分辨多目标的性能；直方图方位估计能抗强线谱相干干扰；加权直方图方位估计可以抗宽带相干干扰。

Finally, Jones vectors for the electric fields of the incident and refracted rays are obtained.

最终给出了入射光和折射光电场矢量的琼斯矢量形式。

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。