... 特征常数；特征值 characteristic constant 特征坐标 characteristic coordinates 特征曲线 characteristic curve ...
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给出了焊缝倾角和焊缝转角的广义定义，提出建立焊缝特征坐标系的方法。
The definition of weld slope and weld rotation are described, and characteristics coordinates frame of seam are set up.
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.
颜色分类处理使用特征函数，可以减少颜色坐标转换运算，提高颜色分类速度。
Characteristic function is used for color classification, which can reduce the operation of color coordinate conversion and improve the speed of color classification.
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