1.深度学习:https://zhuanlan.zhihu.com/p/27857399?refer=YJango
2.神经网络:http://www.cnblogs.com/subconscious/p/5058741.html
3.加州理工学院公开课-机器学习与数据挖掘:http://open.163.com/movie/2012/2/I/D/M8FH262HJ_M8FU27PID.html