MATLAB演示信号与系统课程里的相关性质。包括，sz平面映射极零图的响应及其对应关系的动画显示，二阶系统的阶跃响应，傅里叶变换性质，矩形波、锯齿波的傅里叶级数分解的动画演示-MATLAB demo signals and systems related to the nature of the curriculum. Including, sz mapping plane pole-zero diagram of response and correspondence between anim

通过傅里叶变换提高图像的分辨率，使图像边缘更加平滑，明显减弱锯齿形状。(The resolution of the image is improved by Fourier transform, and the edge of the image is smoother and the sawtooth is obviously weakened.)