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All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year Sort by creator [A → Z]' creator [Z → A]' publishing year ↑ (asc)' publishing year ↓ (desc)' title [A → Z]' title [Z → A]' Simple Search Hits 1 – 1 of 1 1 THUIR at TREC 2009 Web Track: Finding Relevant and Diverse Results for Large Scale Web Search Li, Z. C.; Chen, F.; Xing, Q. L.; Miao, J. W.; Xue, Y. F.; Zhu, T.; Zhou, B.; Chen, R. W.; Liu, Y. Q.; Zhang, M.; Jin, Y.; Ma, S. P. In: DTIC (2009) Abstract: This is the 8th year that IR group of Tsinghua University (THUIR) participates in TREC. This year we focus on Web track, which contains two tasks, namely ad hoc and diversity. On ad hoc task, we improved the efficiency of our distributed retrieval system TMiner to handle terabytes of Web data. Then three studies have been done, namely page quality estimation, ranking feature analysis, and model comparison. On diversity task, we proposed several new approaches on searching strategy, user intention detection, and duplication elimination. To mine user's intention, we proposed and compared two different strategies, namely 'searching + content-based diversity' which is a kind of result clustering, and 'user based diverse intention prediction + searching' which is in the branch of query expansion. ; Published in Proceedings of the Text REtrieval Conference (18th), TREC 2009, held in Gaithersburg, MD, 17-20 Nov 2009. The conference was co-sponsored by the National Institute of Standards and Technology (NIST) the Defense Advanced Research Projects Agency (DARPA) and the Advanced Research and Development Activity (ARDA). The original document contains color images. Keyword: *INFORMATION RETRIEVAL; *INTERNET BROWSERS; ALGORITHMS; ANTI-SPAM TECHNIQUES; CHINA; CLUSTERING; Computer Programming and Software; Cybernetics; FOREIGN REPORTS; HIERARCHICAL INCREMENTAL ONLINE CLUSTERING ALGORITHM; Information Science; LARGE SCALE WEB SEARCHES; Linguistics; METADATA; MODEL COMPARISON; MODELS; PAGE QUALITY ESTIMATION; RANKING; RANKING FEATURE ANALYSIS; SEARCHING; SYMPOSIA; TEXT PROCESSING; TEXT RETRIEVAL; TITLE KEYWORD STUFFING URL: http://www.dtic.mil/docs/citations/ADA517807 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA517807 BASE Hide details

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