拟合圆程序，实现根据测量点实现二维平面内圆的拟合，可以输入测量点，C语言实现-Circle fitting procedure, to achieve the realization of measurement points in accordance with two-dimensional plane of fitting a round, you can enter the measurement points, C language

BP神经网络用于函数拟合与模式识别，利用最小二乘算法实现对三维平面的拟合，包括轨道机动仿真、初轨计算。- BP neural network function fitting and pattern recognition, Least-squares algorithm to fit a three-dimensional plane, Including orbital maneuvering simulation, initial orbit calculation.

对平面度进行计算和构造拟合平面等算法，从而求出点到平面的距离和平面到平面之间的距离。(The plane distance is calculated and the fitting plane is constructed, and the distance between the point and the plane and the distance between plane and plane are calculated.)