參考https://cs.nyu.edu/~mohri/mls/ml_boosting.pdf
參考http://www.chengli.io/tutorials/gradient_boosting.pdf
參考 https://www.zhihu.com/question/54626685?from=profile_question_card
參考https://cs.nyu.edu/~mohri/mls/ml_boosting.pdf
參考http://www.chengli.io/tutorials/gradient_boosting.pdf
參考 https://www.zhihu.com/question/54626685?from=profile_question_card