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1·An interpolation of spiral of Archimedes algorithm based on time division is developed in the article.

提出了一种基于时间分割的阿基米德螺线的直接插补算法。

2·The mathematical model of bending logs of curved elliptical cylinder is analysed with the elliptical-archimedes spiral envelope in cylindric coordinate.

本文采用柱坐标，以椭圆—阿基米德螺线包络组成解析曲线椭圆柱体的弯曲原木的数学模型。