Language Model Information Retrieval with Document Expansion Tao Tao author Xuanhui Wang author Qiaozhu Mei author ChengXiang Zhai author 2006-06 text Proceedings of the Human Language Technology Conference of the NAACL, Main Conference Robert C Moore editor Jeff Bilmes editor Jennifer Chu-Carroll editor Mark Sanderson editor Association for Computational Linguistics New York City, USA conference publication tao-etal-2006-language https://aclanthology.org/N06-1052/ 2006-06 407 414