它是一种用分段逼近函数近似代替连续函数，作连续傅氏变换的近似算法。
It is an approximate algorithm of continuous Fourier transform in which some approaching functions of segments are approximately used instead of continuous functions.
定义磨光函数逼近阶跃函数的可操作的近似是第二步；
The second step is to define the polish function to approach the step-up function;
提出了小波函数和普通函数内积数值计算的外推加速算法，给出了外推加速算法的可行性保障定理。结果表明此算法的收敛速度较快， 得到的近似值的逼近效果较好。
In this paper, we give an extrapolation method for integral with wavelet. Theorem can ensure it is possibility. The result show that the method converge quickly, and the approach effect is very good.
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