from Eric Jang
Normalizing flows transform simple densities (like Gaussians) into rich complex distributions that can be used for generative models, RL, and variational inference.
Supplementary knowledge:
1. 仿射变换： 伸缩+平移
！！！对不起！！，知识储备量不够，看不懂。。。。
Reference:
https://zhuanlan.zhihu.com/p/59615785