THUIR at TREC 2004: QA

Improved Feature Selection and Redundance Computing - THUIR at TREC 2004 Novelty Track

This is the third years that Tsinghua University Information Retrieval Group (THUIR) participates in Novelty task of TREC. Our research on this year’s novelty track mainly focused on four aspects: (1) text feature selection and reduction; (2) improved sentence classification in finding relevant information; (3)efficient sentence redundancy computing; (4) effective result filtering. All experime...

Finding "Abstract Fields" of Web Pages and Query Specific Retrieval - THUIR at TREC 2004 Web Track

Using Normal PC to Index and Retrieval Terabyte Document - THUIR at TREC 2004 Terabyte Track

THUIR at TREC 2004: Genomics Track

This is the first time that THUIR participates in TREC Genomics Track. We took part in both Ad hoc retrieval task and Categorization task. Based on our retrieval system TMiner, our research in the Ad hoc retrieval task focuses on: (1) Category of organism retrieval strategy; (2) Primary Feature Model; (3) Query Expansion (QE) technology; (4) Result fusion method. Five official runs have been su...

THUIR at TREC 2003: Novelty, Robust and Web

This is the second time that Tsinghua University Information Retrieval Group (THUIR) participates in TREC. In this year, we took part in four tracks: novelty, robust, web and HARD, describing in following sections, respectively. A new IR system named TMiner has been built on which all experiments have been performed. In the system, Primary Feature Model (PFM) has been proposed and combined with...