source code for curve fitting includes regression mechanism

匹配选择好所需的拟合曲线类型及其子类型，并进行相关设置： ——如果是非自定义的类型，根据实际需要点击“Fit options”按钮，设置拟合算法、修改待估计参数的上下限等参数；-Select the required matching good fitting curve type and sub-types, and associated settings:- If a non-custom types, according to the actual need to click the

QT，C++，PID，温控PID，PID模拟器，曲线拟合，最小二乘法-QT, C++, PID, temperature PID, PID simulator, curve fitting, least square method

用最下二乘法多项式进行曲线拟合进而插值。(With the least two multiplicative polynomial for curve fitting, and then interpolation.)