R 2 D 2 at NTCIR 2 Ad-hoc Task: Relevance-based Superimposition Model for IR.
Teruhito Kanazawa, Atsuhiro Takasu, Jun Adachi · NTCIR · 2001
This paper describes our evaluation experiments for NTCIR 2 ad-hoc task. We developed a retrieval system using the Relevance-based Superimposition (RS) model, in which document vectors are modified based on the relevance of the documents. The major focus of this year is on combination of the RS model and query expansion (QE). We submitted fully automatic ad-hoc results brought by different parameter settings.