Technical University of Lisbon CLEF 2008 Submission: TEL@CLEF Monolingual Task

Jorge Machado, Bruno Martins, José Luis Borbinha
2008 Conference and Labs of the Evaluation Forum  
We describe our participation in the TEL@CLEF task of the CLEF 2008 ad-hoc track, where we measured the retrieval performance of the IR service that is currently under development as part of the DIGMAP project. DIGMAP's IR service is mostly based on Lucene, together with extensions for using query expansion and multinomial language modelling. In our runs, we experimented combinations of query expansion, Lucene's off-the-shelf ranking scheme and the ranking scheme based on multinomial language
more » ... delling. Results show that query expansion and multinomial language modelling both result in increased performance.
dblp:conf/clef/MachadoMB08a fatcat:sud7izr24vda5i5yhufkfhnigm