刘铁岩，李航排序学习算法经典书籍

1. 李航排序学习Hang Li-Learning to Rank for Information Retrieval and Natural Language Processing(Synthesis Lectures on Human Language Technologies)-Morgan & Claypool Publishers (2011) 2.刘铁岩排序学习Tie-Yan Liu (auth.)-Learning to Rank for Information Retrieval-Springer-Verlag Berlin Heidelberg (2011)