Length of a Curve [数] 曲线长度 ; 曲线的长度
arc length of curve 曲线的弧长
minimum length of horizontal curve 平曲线最小长度
minimum length of vertical curve 竖曲线最小长度
arc length of a curve 曲线的弧长
arc length of cosine curve 余弦曲线弧长
length of transition curve 缓和曲线 ; 缓和曲线长度
Ratio of Curve length 曲线长度的比例
The new model regards the length of curve section as its objective, in which main factors affecting 3 D trajectory design & control are considered quantitatively.
该模型以最短曲线段长度为目标函数，定量地考虑了影响轨道设计与控制的主要因素。
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。
Similarly, this distance, the length of delta r is not exactly the length along the curve.
同样地，这个距离，△r的模也不完全等于它跨过的弧长。
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