文中根据曲线曲面型值点，分别用四种参数化方法构造节点矢量，利用NURBS方法反算控制点。
In this paper, the control points are calculated based on the curve or surface's data points and the knot vector which is calculated with four kinds of parameterization by the method of NURBS.
如果看到一个矢量指向你，你看到的是一个点。
棕煌蜂鸟悬停时引发的尾流。黄色的矢量位点是通过粒子图像测速技术显现的气流速度。
The wake of a hovering rufous hummingbird. Yellow vectors show air velocity, revealed by particle image velocimetry.
矢量数据指的是通过几何结构定义的数据，如线段表示街道，而点表示位置。
Vector data refers to data defined by geometric constructs, such as line segments representing a street or points representing single locations.
黄色的矢量位点是通过粒子图像测速技术显现的气流速度。
Yellow vectors show air velocity, revealed by particle image velocimetry.
矢量乘法有两种,一种叫做“点积“,通常也被叫作“数量积
There are two ways that we multiply vectors and one is called the "dot product" often also called the scalar product.
可缩放矢量图形(SVG)恰巧能实现这一点。
简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
目前为止，最常用的矢量格式是ESRIShapefile(见参考资料)，它只存储一种图形；每个文件只包含点或多边形或线条。
The most common vector format by far is the ESRI Shapefile (see Resources), which stores only a single shape type; each file can contain only points or only polygons or only lines.
假设A是y方向上的,单位矢量,则是z方向上的单位矢量。，and，B，is，the，unit，vector，in，the，z，direction。,那A点B是多少呢？
Suppose A itself is the unit vector in the y direction B Then A dot B is what?
矢量作图更像是用铅笔画画，先拿铅笔确定一些点，然后用直线、曲线、方框和椭圆框连接这些点。
A vector drawing is like a pencil drawing where you take a pencil from one point to another and connect the points with straight lines, curved lines, rectangles, and ellipses.
并且这个平面包含了原点和动点，以及速度矢量。
And, that's the plane that contains the origin, the point, and the velocity vector.
因此矢量的方向，是你们将看到的，这个点，就好像它是从黑板里面，戳出来的一样。
And so the direction of the vector is such that you will see the tip of the vector as though it's coming straight out of the blackboard.
本文采用将高斯波束法，射线追迹和矢量衍射积分相结合的方法来分析单波束的点聚焦透镜天线。
We adopted Gaussian beam, ray tracing and vector diffraction integration together to analyze single beam spot-focusing lens antenna.
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse Angle between two diagonals of a cube.
本文对多端口反射计的任意相位单位矢量五点校准法作了改进。
An improved multi port reflectometer calibration method using five unit vectors with arbitrary phase is described.
通过特征点匹配，求其局部运动矢量；
The local motion vector of the block was determined by feature point matching.
在图像的边缘空间，提取图像边缘点的颜色矢量角直方图，以此来描述图像的内容。
The color vector Angle histogram is constructed in the image edge and used to describe the image.
阐述了双馈发电机的矢量控制原理及其相应的最大功率点跟踪和发电机定子侧输出单位功率因数的控制策略。
The paper analyzes the vector control theory for doubly fed induction generator, Maximal Power Point Track (MPPT) and control strategy for the unity power factor of stator output.
角动量：(有参照点)的矢量和粒子线性动量的向量积。
Angular momentum: the vector product of the position vector (from a reference point) and the linear momentum of a particle.
全变换方法用于处理每一边界约束点，对刚度矩阵和位移矢量作相应的算子运算。
The full transformation method deals with each boundary constraint node, and for stiff matrices and displacement vector, using operator transformation, relative operator calculation is performed.
该方法仅需4对消隐点象面坐标便可线性求解出旋转矩阵，再用2个空间点坐标便可线性求解出平移矢量。
The rotation matrix can be linearly acquired by using only 4 vanishing points and the translation vector can be linearly solved by using only 2 spatial point objects.
这种沉积相模型为矢量空间上的点，可以按矢量点之间的最短距离原则分层。
Since this sedimentary facies model consists of points in the vector space, zonation can be made according to the principle of "shortest distance" between vector points.
介绍用双三次参数曲线拟合曲面、平头铣刀的直径、铣削的步长及行距选择、刀位点和刀轴矢量的计算。
It introduced imitating surfaces with bicubic parametric curves, feed length, cutter location and vector of cutter location.
用矢量点积求立方体的两条对角线所夹的钝角。
Use the vector dot product to find the obtuse angle between two diagonals of a cube .
本文在经典力学的基础上，提出求解动点作平面复合运动的直接矢量导数方法和矩阵方法的定型公式。
On the basis of classical mechanics, the author derived a series of typical vector and matrix formulas for solving the problems of a particle that takes part in plane complex movements.
每个边缘点具有正常矢量指向在垂直的方向上的边缘。
Each edge point has a normal vector pointing in the direction perpendicular to the edge.
目前徘徊在矢量点的时候是一个新的光标。
本文主要研究三电平逆变器在电压空间矢量控制过程中中性点电压平衡的控制方法。
This paper proposes a new strategy for balancing the neutral point voltage in the process of the three-level inverter vector controlling.
本文主要研究三电平逆变器在电压空间矢量控制过程中中性点电压平衡的控制方法。
This paper proposes a new strategy for balancing the neutral point voltage in the process of the three-level inverter vector controlling.
应用推荐