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Paper Abstract and Keywords
Presentation 2010-06-28 14:40
Two step adjustment technique of term weight
Hiroya Yano, Tai Nakajima (Waseda Univ.), Hayato Yamana (Waseda Univ./NII) DE2010-9
Abstract (in Japanese) (See Japanese page) 
(in English) TF・IDF method is one of the methods to weight terms in the field of document retrieval. IDF value shows the degree of how a term is difficult to appear in the document set, and depends on the document set to be retrieved. Therefore, the problem is that, even if a term is difficult to appear in the same field of document set as query (which means the term is highly specific in the document), IDF value of term which appears easily in the document set to be retrieved is small. In this paper, we propose and study two step adjustment technique of term weight. In the first step, we get documents related to query using vector space model. In the next step, we retrieve relevant documents using IDF calculated from the document set acquired in the first step. Experiments using NTCIR-1 IR task collection indicate that, the precision of proposed method is improved about 7.1 percent comparing to that vector space model, and is almost the same value of the precision which get the highest in NTCIR-1.
Keyword (in Japanese) (See Japanese page) 
(in English) document retrieval / TF・IDF / pseudo-relevance feedback / / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 107, DE2010-9, pp. 45-50, June 2010.
Paper # DE2010-9 
Date of Issue 2010-06-21 (DE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF DE2010-9

Conference Information
Committee DE  
Conference Date 2010-06-28 - 2010-06-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Sensor Data Processing, Stream Databases, etc. 
Paper Information
Registration To DE 
Conference Code 2010-06-DE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Two step adjustment technique of term weight 
Sub Title (in English)  
Keyword(1) document retrieval  
Keyword(2) TF・IDF  
Keyword(3) pseudo-relevance feedback  
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1st Author's Name Hiroya Yano  
1st Author's Affiliation Waseda University (Waseda Univ.)
2nd Author's Name Tai Nakajima  
2nd Author's Affiliation Waseda University (Waseda Univ.)
3rd Author's Name Hayato Yamana  
3rd Author's Affiliation Waseda University/National Institute of Informatics (Waseda Univ./NII)
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Speaker Author-1 
Date Time 2010-06-28 14:40:00 
Presentation Time 25 minutes 
Registration for DE 
Paper # DE2010-9 
Volume (vol) vol.110 
Number (no) no.107 
Page pp.45-50 
#Pages 6 
Date of Issue 2010-06-21 (DE) 

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