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?
单位矢量,始终指向,轴的正方向,轴方向的单位矢量，and，the，unit，vector,是这个。
Unit vectors are always pointing in the direction of the positive axis x in the x direction is this one.
采用D-H后置法建立了4R机器人运动方程，建立机器人执行机构在空间相对位置关系的数学模型，由此可解出手部位置和用单位矢量方向余弦表示的姿态。
A kinematics model by post D-H method for 4R-robot was offered in this paper, which derived the manipulator finger position and its attitude with unit vectors of direction cosine.
将每个像素的三个色彩通道看成是一个三维矢量，则矢量的单位方向向量和亮度分别表示像素的色彩和亮度。
The three color channels of each pixel were regard as 3-dimensional vector, and the unit directional vector and its magnitude represented the chromaticity and the pixel brightness separately.
将每个像素的三个色彩通道看成是一个三维矢量，则矢量的单位方向向量和亮度分别表示像素的色彩和亮度。
The three color channels of each pixel were regard as 3-dimensional vector, and the unit directional vector and its magnitude represented the chromaticity and the pixel brightness separately.
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