SJTU at TREC 2004: Web Track Experiments

: This is the first year our lab to participate in Trec. We participate in Mixed-Query task for the Web track. All the runs we submitted are based on the modified Okapi weighting scheme. Besides, we used several heuristics as the re-rank method: site-merging, minimal span weight, and etc. Also, the PageRank of a document is combined with the similarity of the document with the query to obtain an overall ranking of documents. Especially for the mixed-query task, we try a simple classification method to estimate whether the query is topic distillation or entry-page finding.

• Type: Conference
• Year: 2004
• Where: TREC
• Authors: Yiming Lu, Jian Hu, Fanyuan Ma
• Keywords: Minimal Span Weight, Mixed-query Task, Okapi Weighting Scheme, TREC 2004, TREC 2008