这是一条平面曲线。This is a plane curve 圆，圆形从定点（圆心）等距离到任一点的平面曲线A plane curve everywhere equidistant from a given fixed point, the center ...
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In this paper a method for detecting sharp "corners" in a chain-coded plane curve is described.
本文描述了一种在平面码链曲线上检测尖锐角点的方法。
It is known that the projection of the intersection of quadrics with common plane of symmetry on this plane is a curve of second order.
具有公共对称平面的二次曲面的交线在该平面上的投影为二次曲线。
This paper has proved that a plane curve cis a circle if and only ifc is the locus of a moving point that has a constant second power average of distances from n fixed points.
本文提出了确定内燃机配气机构刚度的三种数据处理方法，并对处理结果作出了分析、比较，确认二次刚度平均法是一种较好的实用方法。
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