Thread Cleaning and Merging for Microblog Topic Detection Jianfeng Zhang author Yunqing Xia author Bin Ma author Jianmin Yao author Yu Hong author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication zhang-etal-2011-thread https://aclanthology.org/I11-1066/ 2011-11 589 597