Improving the Effectiveness of Information Retrieval with Clustering and Fusion Jian Zhang author Jianfeng Gao author Ming Zhou author Jiaxing Wang author 2001-02 text International Journal of Computational Linguistics & Chinese Language Processing, Volume 6, Number 1, February 2001: Special Issue on Natural Language Processing Researches in MSRA conference publication zhang-etal-2001-improving https://aclanthology.org/O01-2005/ 2001-02 109 125