计算出自相关系数和互相关系数；
The self - correlation coefficient and cross-correlation coefficient are also calculated.
应用了快速傅氏变换计算两个台记录的地震面波的互相关函数。
Fast Fourier transform has been applied for computing the cross-correlation of seismic surface waves for records at two stations.
该算法不仅仅在精度上高于其它互相关算法，更由于采用了金字塔算法使计算量大大减少，提高了计算速度。
This algorithm is not only more accuracy than the other correlation-based algorithms but also at the expense of lower computation costs by used the pyramid algorithm.
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