That means a vector that is at every point of the curve perpendicular to the curve and has length one.
也就是，曲线每一点上,垂直于曲线，模长为1的向量。
In this paper, a numerical method is presented for nearly arc length parameterization of parametric curve.
讨论参数曲线近似弧长参数化的数值方法。
The results showed that the change patterns of spacer length, ramet density, branching intensity, and branching Angle of Duchesnea indica were in a quadratic curve when the elevation increased.
结果表明，随着海拔的增加，间隔子长度、分株密度、分枝角度和分枝强度呈二次曲线变化。
Measuring and analysis of curve length is a valued research subject both in basic theory and practical application.
曲线长度的度量和分析是一项具有基础理论和应用价值双重意义的研究课题。
The direct solution formula for the curve length of a theoretical control point on the transition curve is proposed, with the solution of high order equation being avoided.
导出了隧道控制测量中缓和曲线理论投点曲线长的直接求解公式。
The omega curve prolongs the length of the arch thread, which enables the arch thread to generate a softer orthodontic force and fewer side effects.
欧米伽曲的存在延长了弓丝的长度，使得弓丝产生的矫治力更柔和，副作用更少。
A new adaptive method about curve interpolation is proposed, which can automatically adjust step-length of motion and confine the contour error within a given tolerance.
本文给出了一种新型自适应曲线插补方法。即根据弓高误差自动调整进给步长，同时将轮廓误差限定在允许范围之内的参数曲线实时插补方法。
Distance:The length or numerical value of a straight line or curve.
昨天查了数学书：截距一定是正的，它是某一轴上坐标的绝对值。
Distance:The length or numerical value of a straight line or curve.
昨天查了数学书：截距一定是正的，它是某一轴上坐标的绝对值。
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