NTCIR-4 PATENT Experiments at Osaka Kyoiku University - Gram-Based Passage Index and Essential Words.
Takashi SatoNao HattaPublished in: NTCIR (2004)
Keyphrases
- patent retrieval
- prior art
- index terms
- patent search
- word frequency
- n gram
- patent documents
- test collection
- index structure
- query translation
- document retrieval
- e learning
- keywords
- word sense disambiguation
- intellectual property
- information retrieval
- case study
- english chinese
- question answering
- related words
- document collections
- ir evaluation
- data structure
- query expansion
- text categorization
- retrieval effectiveness
- multiword
- word segmentation
- pseudo relevance feedback
- text documents
- ranked list
- database