Kevyn Collins-Thompson. Reducing the risk of query expansion via robust constrained optimization. In David Wai-Lok Cheung, Il-Yeol Song, Wesley W. Chu, Xiaohua Hu, Jimmy J. Lin, editors, Proceedings of the 18th ACM Conference on Information and Knowledge Management, CIKM 2009, Hong Kong, China, November 2-6, 2009. pages 837-846, ACM, 2009. [doi]
Abstract is missing.