NTCIR-5 Patent Retrieval Experiments at Hitachi.
Hisao MaseTadataka MatsubayashiYuichi OgawaTakaaki YayoiYusuke SatoMakoto IwayamaPublished in: NTCIR (2005)
Keyphrases
- patent retrieval
- clef ip
- test collection
- prior art
- patent documents
- patent search
- retrieval effectiveness
- query translation
- query expansion
- ir evaluation
- information retrieval
- retrieval model
- language model
- relevant documents
- retrieval systems
- pseudo relevance feedback
- recall oriented
- patent prior art search
- web search engines
- document collections
- co occurrence
- data model
- database systems