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