Aim To determine the measured profile of a wheel in railway vehicle. Methods So - called piecewise curve-fitting method of the third derivative continuity is employed.

目的拟合列车车轮踏面的实恻轮廓曲线，方法采用三阶导数连续的分段曲线拟合法。

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For continuity of flying or moving, both methods have to get fitting curves.

为了得到沿路径连续的飞行或运动，两种路径生成法都必须对路径进行拟合。

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