矢量

This thesis make a study on Vector-contorl WVF system of asynchronous motor. In the course of study, making use of the mathematical model of asynchomous motor in MT axes. Then both open-loop control system and close-loop vector-control system are respectively simulated with simulation block SIMULINK in MATLAB.

本文对异步电动机变频调速系统进行了研究，利用异步电动机在二相同步旋转MT坐标系下的数学模型，使用MATLAB中的仿真工具箱SIMULINK分别对开环控制系统和闭环矢量控制变频调速系统进行了仿真。

The main purpose lies in forming the spontaneous polarization vector with neighboring opposite periodic structure.

畴工程操作的目的在于形成自发极化矢量相邻相反的周期性结构。

Using inclination vector as a non-singular orbital element, engineering oriented mathematical models for inclination control of geosta- tionary orbit are established,and unified optimal strategies for inclination control both in north-south station aquisition and north-south station keeping derived.

本文以倾角矢量作为无奇点轨道要素，建立静止卫星轨道倾角控制的工程实用数学模型，进而导出南北定点捕获和南北位置保持两种情况下统一的倾角控制燃料最优策略。

This paper enlarges the concept of global vectorization to the scope of a line network, and proposes the line network oriented global vectorization method.

本文将整体识别概念的范围由单个图形对象扩大到线条网，提出了线条网的整体矢量化方法。

The space quadrature vector oriented control can decouple between output current and frequency of the inverter by Park transformation, which guarantee the quite high accuracy of the 90 degree phase angle between the two-phase output current that supply for two phase electromagnetic stirrer in quite low frequency.

提出了一种基于空间矢量定向的二相电磁搅拌器逆变电源的结构和控制策略，该逆变器采用六桥臂式主电路拓扑结构，逆变器的第三相桥臂与两相电磁搅拌器的中点相连。

In the frame of Random Matrix Theory,the statistic functions of therandom orthogonal unitary vectors are calculated.It is shown that their means andfluctuations will tend to zero with the increase of N,while following thescaling laws.

在随机矩阵理论的框架内，我们数值地计算了随机的正交归一矢量的这两个统计函数，发现它们的平均值和涨落随N(N＝1/h)的增大而趋于0，并且有明显的标度关系。

Net ameliorates the traditional polynomials image registration method, puts forward a new method using orthogonal polynomials, expatiates the principle, arithmetic of this technique, and then realizes the clipping registration and superposition of vectorgraph and remote-sensing image.

Net 平台的基础上，改进了传统的多项式图像配准方法，提出了一种利用正交多项式进行图像配准的新思路，从而进一步实现了矢量图与遥感图像的快速叠合。

For any orthogonal vectors in the uncorrelated projection space, the obtained features in the original space are statistically uncorrelated.

对于无相关投影空间中的任何正交矢量集，其在原空间中的特征统计无关。

By means of the Singular Spectrum Analysis, We transform the reconstructed space to an orthogonal coordinate and then calculate its correlation dimension.

通过对重构空间引入奇异谱分析，将状态矢量变换到一组正交的坐标系，进而计算其关联维数。

The main works include five parts:(1) A modified K-means algorithm for optimizing the RBPNNs' structures was proposed;(2) The RBPNNs' structure optimization method based on the orthogonal least square algorithm was proposed that can greatly reduce the computation expense for the structure optimization;(3) Using the GA to perform the whole structure optimization of the RBPNNs was proposed in this thesis, which include simultaneous optimization of the hidden centers and the corresponding controlling parameters of the kernel functions.

主要工作体现在如下三个方面：(1)提出一种改进的 K-Means 算法；(2)提出了基于递推正交最小二乘算法的结构优化算法来训练径向基概率神经网络，从而大大减小了用于结构优化的计算开销；(3)提出使用遗传算法来实现径向基概率神经网络的全结构优化，即隐中心矢量和核函数控制参数同时优化，通过新设计的编码方式、新构造的适应度函数，充分发挥了 GA 的全局搜索性能，使得所优化的径向基概率神经网络的结构趋于最简。

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。