PACRR Gated Expansion for TREC CAR 2018

Sean MacAvaney, Nazli Goharian, Ophir Frieder, Andrew Yates
2018 Text Retrieval Conference  
In this work, we present our approach to the 2018 TREC Complex Answer Retrieval (CAR) task. We submitted two passage retrieval runs. The first uses the state-of-the-art technique from TREC CAR 2017: a modified neural ranker modified to incorporate query heading frequency information while performing term matching on each heading independently. The second run incorporates a novel gated technique for incorporating query expansion terms in a neural ranker. Our TREC runs indicate significant
more » ... ance improvements can be achieved when using the expansion approach.
dblp:conf/trec/MacAvaneyGFY18 fatcat:3o7hjlidg5aqbcjfljxayw7s5u