A direct searching method without computing the derivative functions is given. 针对这一问题给出相应的直接搜索算法，证明了算法的收敛性，并给出一些算例。
On the contrary, non-linear searching calibration method is high accuracy while its speed is low and divergence usually occurs. 相反如采用非线性搜索算法，标定精度高，但存在标定速度慢以及会出现不收敛现象。
