PRIS at TREC 2011 Microblog Track.
Li Yan, Zhenhua Zhang, Wenlong Lv, Qianlong Xie, Yuhang Lin, Rao Xu, Weiran Xu, Guang Chen, Jun Hai Guo · 2011
Our system to Micro-blog Track at TREC2011 is described in this paper, which includes data obtaining and preprocessing, index building and query expansion. There‟re two methods of query expansion introduced in this report: Word Activation Force algorithm (WAF) and Electric Resistance Network. We also show the evaluation results for our team and the comparison with the best and median evaluations. The Micro-blog Track examines search tasks and evaluation methodologies for information seeking behaviors in micro-blogging environments. This year is the first year of the Micro-blog Track, which aims at addressing a search task whereby a user's information need is represented by a query at a specific time. In particular, it is a real-time search task, where the user wishes to see