Presentation	2001/7/11 Effect of Relationships between Words on Information Retrieval Atsushi MATSUMURA, Atsuhiro TAKASU, Jun ADACHI,
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Abstract(in English)	Conventional keyword based retrieval methods have obviously limitation on retrieval effectiveness, because they use only keywords and their statistical characteristics. We therefore developed two information retrieval methods using relationships between words. One is a method using dependency relationships between words and another is a method using the ordered co-occurrence information of words in a sentence. Through retrieval experiments with NTCIR-1 and NTCIR-2, which are Japanese test collections for information retrieval, we showed that the effect of using relationships between words on information retrieval is diminishing as the effectiveness of baseline is growing. We also discussed effectiveness of our methods, giving analysis of search results for some search topics.
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Paper #	DE2001-48
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Committee	DE
Conference Date	2001/7/11(1days)
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Registration To	Data Engineering (DE)
Language	JPN
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Title (in English)	Effect of Relationships between Words on Information Retrieval
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1st Author's Name	Atsushi MATSUMURA
1st Author's Affiliation	University of Library and Information Science()
2nd Author's Name	Atsuhiro TAKASU
2nd Author's Affiliation	National Institute of Informatics(NII)
3rd Author's Name	Jun ADACHI
3rd Author's Affiliation	National Institute of Informatics(NII)
Date	2001/7/11
Paper #	DE2001-48
Volume (vol)	vol.101
Number (no)	192
Page	pp.pp.-
#Pages	8
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