參考
https://zhuanlan.zhihu.com/p/25416673
https://hit-scir.gitbooks.io/neural-networks-and-deep-learning-zh_cn/content/chap2/c2s4.html
參考
https://zhuanlan.zhihu.com/p/25416673
https://hit-scir.gitbooks.io/neural-networks-and-deep-learning-zh_cn/content/chap2/c2s4.html