http://openclassroom.stanford.edu/MainFolder/CoursePage.php?course=MachineLearning
http://deeplearning.stanford.edu/wiki/index.php/UFLDL_Tutorial
http://openclassroom.stanford.edu/MainFolder/CoursePage.php?course=DeepLearning
原文：http://www.cnblogs.com/souxun2014/p/4035445.html