参考资料：
https://jaan.io/what-is-variational-autoencoder-vae-tutorial/
这篇文章写的太好了，字字珠玑，完成项目后总结吸取！
补充材料：
https://ai.stackexchange.com/questions/27341/in-variational-autoencoders-why-do-people-use-mse-for-the-loss#:~:text=As%20you%20mentioned%2C%20MSE%20is,which%20is%20MSE%2Dlike%20loss.
