中文说明：代码可以实现时频转换功能，在此代码基础上，你可以通过修改参数来进行其他的仿真实验，譬如可以对时域信号进行放大、压缩、反转等，代码是我自己用的，可以实现功能。
English Description：
The code can realize the function of time-frequency conversion. On the basis of this code, you can modify the parameters to carry out other simulation experiments, such as amplifying, compressing and reversing the time-domain signal. The code is for my own use and can realize the function.