NTCIR-6 Patent Retrieval Experiments at Hitachi.

Hisao Mase Makoto Iwayama

Published in: NTCIR (2007)

Keyphrases

patent retrieval
test collection
clef ip
prior art
patent search
query translation
retrieval effectiveness
patent documents
query expansion
information retrieval
ir evaluation
recall oriented
relevant documents
average precision
document collections
retrieval model