GBDT算法整理
scikit-learn 梯度提升树(GBDT)调参小结
https://www.cnblogs.com/DjangoBlog/p/6201663.html
http://blog.youkuaiyun.com/qq_34531825/article/details/52366265
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http://blog.youkuaiyun.com/davidie/article/details/50897278
http://www.360doc.com/content/16/1213/13/20320906_614312249.shtml