1. https://blog.csdn.net/u013108511/article/details/79016939

2. http://open.163.com/movie/2010/11/1/G/M6V0BQC4M_M6V2B5R1G.html

https://www.cnblogs.com/charlotte77/p/5629865.html

BP神经网络(反向传播)详细推导 _ Cowry 

https://cowry5.com/2018/05/21/180521-BP%E7%A5%9E%E7%BB%8F%E7%BD%91%E7%BB%9C(%E5%8F%8D%E5%90%91%E4%BC%A0%E6%92%AD)%E8%AF%A6%E7%BB%86%E6%8E%A8%E5%AF%BC/

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