delay
a glance at neural networks and deep learning by Michael Nielsen
http://www.liuxiao.org/wp-content/uploads/2016/10/nndl-ebook.pdf
todo
loss function
BP
交叉熵
softmax函数
summary：https://blog.csdn.net/ingwfj/article/details/77920099
http://www.liuxiao.org/wp-content/uploads/2016/10/nndl-ebook.pdf
todo
loss function
BP
交叉熵
softmax函数
summary：https://blog.csdn.net/ingwfj/article/details/77920099
