http://cs231n.stanford.edu/
http://cs231n.github.io/
https://zhuanlan.zhihu.com/p/21930884
https://github.com/Halfish/cs231n
https://github.com/wjbKimberly/cs231n_spring_2017_assignment
https://github.com/sharedeeply/cs231n-camp
https://study.163.com/course/courseMain.htm?courseId=1004697005