矢量

This paper presents a research on the algorithm of optimal set of statistically uncorrelated discriminant vectors.

摘要该文对统计不相关最优鉴别矢量集算法进行研究，在分析统计不相关最优鉴别矢量集算法的基础上提出了一种改进的方法。

The new algorithm is shown to be efficient to overcome the problem of neuron underutilization.

关键词神经网络，竞争学习，矢量量化，神经元欠利用，算法1引言根据Shannon的"率失真理论"，矢量量

To eliminate common-mode voltage of cascaded multi-level inverter, three kinds of phase-difference SVM based on left and right bridge vectors are proposed firstly. From these three modulations, equivalent SPWM components are deduced, and the unipolarity and bipolarity of output waveforms are analyzed. 2π/3 PD-SVM (phase-difference space vector modulation) is testified be unipolar.

为消除级联型多电平逆变器的输出共模电压，首先提出了基于左、右桥臂矢量的三类相差空间矢量调制(space vector modulation，SVM)技术，数学推导出三类调制技术的等效正弦脉宽调制(sine pulse width modulation，SPWM)的调制波，并分析了其各自相电压输出波形的单、双极性，证明2π/3相差SVM必为单极性调制。

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。

It is pointed out, that if the vector and pseudo-vector coupling in the universal Fermi weak interaction propo...

指出假使在重正化以后矢量耦合和赝矢量耦合常数不再相等，那末不对称因子的数值可能有相当大的改变。

Set up the background gradient vectograph of highway surface at first, according to the comparative result with the gradient vectograph of the present frame image, judge whether it is highway surface background or vehicle , then carry on morphological filtering which can remedy the inside cavity and reject isolated points, and the vehicle is segmented accurately last.

首先建立路面背景梯度矢量图，根据与当前帧图像的梯度矢量图的比较结果，判断是否是路面背景或是运动车辆，然后对运动车辆区域进行形态滤波，弥补内部空洞和剔除杂点，进而准确分割出车辆。

A new dynamic vector Preisach model that takesaccount of the anisotropic characteristics of media and vector reversible component ispresented.

第五章对旋转磁滞问题和交变磁滞问题进行了研究，分析了一些典型的交变磁滞模型，提出了一个新的考虑媒质各向异性及矢量可逆行为的动态矢量Preisach模型。

The paper based on component technology and COM, study and design the vector graph component, realize the function of vector graph, such as the input and output of map, the display of map, mutual plot with mouse, etc.

本文以组件技术和组件对象模型(COM，Component Object Model)为基础，研究和设计GIS矢量图形组件，实现GIS系统的矢量图形功能，如地图的输入输出、地图的显示、鼠标交互绘图等。

The aim of the system is to ameliorate the shortcoming of the computer software used at present. The concepts of COM, WebGIS and vector format are introduced. The system is realized based on MMap, which is a vector map ActiveX component programmed from the bottom.

该系统采用组件化的开发思想，将网络地理信息系统和矢量化的概念引入矿井安全管理之中，在开发的矿井矢量图形控件——MMap(用程序语言从底层自主开发的ActiveX控件)的基础上加以实现。

The transmission coefficients of small circular aperture diffraction were calculated respectively by applying the energy flux density vector and the power flux density vector,and some new results were obtained.

应用能流密度矢量S和功率流密度矢量J，分别计算了微小孔非傍轴衍射的透射系数，得到了一些新的结论。

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。