说明：  计算普通褶积与循环褶积，分别使用时间域与频率域两种方法进行正、反演计算，指出循环褶积计算时所存在的边界效应现象；编写一个做相关分析的源程序
(Calculation ordinary convolution and circular convolution, respectively, using the time domain and frequency domain in two ways positive, inverse calculation, noted the phenomenon of boundary effects loop convolution calculations exist preparation of a correlation analysis was done of the source)