NTCIR-6 Patent Retrieval Experiments at Hitachi.

@inproceedings{mase-2007-ntcir6, author = {Hisao Mase and Makoto Iwayama}, editor = {Noriko Kando}, title = {{NTCIR-6 Patent Retrieval Experiments at Hitachi}}, booktitle = {{Proceedings of the 6th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-6, National Center of Sciences, Tokyo, Japan, May 15-18, 2007}}, publisher = {National Institute of Informatics (NII)}, year = {2007}, url = {http://research.nii.ac.jp/ntcir/workshop/OnlineProceedings6/NTCIR/10.pdf} }