Webis at the TREC 2011 Session Track.

Matthias Hagen Jan Graßegger Maximilian Michel Benno Stein

Published in: TREC (2011)

Keyphrases

information retrieval
test collection
retrieval effectiveness
question answering
ad hoc retrieval
real time
learning algorithm
pseudo relevance feedback
real time tracking
active learning
information extraction
query expansion
relevance judgments
okapi bm