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Improvements that don't add up: ad-hoc retrieval results since 1998.
Timothy G. Armstrong
Alistair Moffat
William Webber
Justin Zobel
Published in:
CIKM (2009)
Keyphrases
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ad hoc retrieval
document collections
query expansion
test collection
data fusion
pseudo relevance feedback
web search
link structure
relevance model
information retrieval
information retrieval systems
retrieval process
social networks
language model
random walk
multiword