吴恩达讲的英语很好听 --2020.02.10
Neural Networks
Origins:algorithms that try to mimic the brain.
Neural Netwaoks model has three layer: input layer,hiden layer(maybe more than one) and output layer.
发现了一个讲的不错的网址，主要讲模型Neural Netwaoks model ：
https://www.jianshu.com/p/c133a5220841
The algorithms exist in hiden layers and results are transfered from one hiden layer to another, until getting the final result.
The weight is simple but vital in this model,deciding the result x1 XNOR x2 could get. After combining the uper models,there is a three layer model correspondingly.