Search Engine Adaptation by Feedback Control Adjustment for Time-sensitive Query Ruiqiang Zhang author Yi Chang author Zhaohui Zheng author Donald Metzler author Jian-yun Nie author 2009-06 text Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Short Papers Mari Ostendorf editor Michael Collins editor Shri Narayanan editor Douglas W Oard editor Lucy Vanderwende editor Association for Computational Linguistics Boulder, Colorado conference publication zhang-etal-2009-search https://aclanthology.org/N09-2042/ 2009-06 165 168