ai learning:
https://github.com/apachecn/ai-roadmap/blob/master/ai-union-201904/README.md
ML核心https://zhuanlan.zhihu.com/p/41623425
决策树剪枝及CART
https://blog.csdn.net/u014688145/article/details/53326910
逻辑回归-最大似然
https://blog.csdn.net/zjuPeco/article/details/77165974
逻辑回归损失函数为什么使用最大似然估计而不用最小二乘法？
https://www.zhihu.com/question/65350200
概率论几个常见定理的解释, 很详细:
https://www.cnblogs.com/LittleHann/p/9569708.html
一个很厉害的博客:
https://www.csuldw.com/categories/ML/
[The Elements of Statistical Learning]中文翻译:
(https://esl.hohoweiya.xyz/book/The%20Elements%20of%20Statistical%20Learning.pdf)
