Animation

Generating .gif files.
Copyright (C) 2019 Jing Wang

Spinning Dancer

FFT

Ref: An Intuitive Explanation of Fourier Theory http://cns-alumni.bu.edu/~slehar/fourier/fourier.html#filtering

Echo

Ref: 刘正春, 赵锦成, 王勇, & 王文婷. (2015). 基于matlab的卷积教学仿真设计——回音系统. 实验科学与技术, 13(5), 62-64.

Convolution