Theoretically speaking, it is a rather-clearly discussed subject to standardize the quadratic equation into the normal forms by spinning the coordinate axis so as to approach the shapes of its curves.
A new calculation is presented, in which the given functions or curves defined by dispersed coordinate points are approximated by quadratic curve in several parts.
本文提出将给定函数或离散坐标点定义的曲线，分段用二次曲线拟合的计算方法。
3
Due to the wide application of infrared distance meters and total stations, coordinate method is widely used in the layout of curves.