NTCIR-5 Patent Retrieval Experiments at Hitachi.

@inproceedings{mase-2005-ntcir5, author = {Hisao Mase and Tadataka Matsubayashi and Yuichi Ogawa and Takaaki Yayoi and Yusuke Sato and Makoto Iwayama}, editor = {Noriko Kando}, title = {{NTCIR-5 Patent Retrieval Experiments at Hitachi}}, booktitle = {{Proceedings of the Fifth NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, Question Answering and Cross-Lingual Information Access, NTCIR-5, National Center of Sciences, Tokyo, Japan, December 6-9, 2005}}, publisher = {National Institute of Informatics (NII)}, year = {2005}, url = {http://research.nii.ac.jp/ntcir/workshop/OnlineProceedings5/data/PATENT/NTCIR5-PATENT-MaseH.pdf} }