研究者詳細 - 太田　学

論文 - 太田　学

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A Decentralized XML Database Approach to Electronic Commerce 査読

ISHIKAWA Hiroshi, OHTA Manabu

IEICE transactions on information and systems E84-D ( 10 ) 1302 - 1312 2001年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電子情報通信学会

Decentralized XML databases are often used in Electronic Commerce(EC)business models such as e-brokers on the Web. To flexibly model such applications, we need a modeling language for EC business processes. To this end, we have adopted a query language approach and have designed a query language, called XBML, for decentralized XML databasesused in EC businesses. In this paper, we explain and validate the functionality of XBML by specifying e-broker business models and describe the implementation of the XBML server, focusing on the distributed query processing.

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On Business Modeling, Distributed Processing, and Data Compression for E-Commerce. 査読

Hiroshi Ishikawa, Shohei Yokoyama, Seiji Isshiki, Manabu Ohta

Proceedings of the Fifth IASTED International Conference Internet and Multimedia Systems and Applications (IMSA 2001) 193 - 198 2001年8月

Document warehousing: a document-intensive application of a multimedia database 査読

H. Ishikawa, M. Ohta, K. Kato

Proceedings Eleventh International Workshop on Research Issues in Data Engineering. Document Management for Data Intensive Business and Scientific Applications. RIDE 2001 25 - 31 2001年4月

A decentralized XML database approach to electronic commerce 査読

H. Ishikawa, M. Ohta

Proceedings 5th International Symposium on Autonomous Decentralized Systems 153 - 160 2001年3月

Query Processing in Web-Based Active Distributed Databases 査読

Hiroshi Ishikawa, Manabu Ohta

Proc. of IASTED International Conference Applied Informatics 317 - 322 2001年2月

Querying web distributed databases for XML-based E-businesses: requirement analysis, design, and implementation. 査読

Hiroshi Ishikawa, Manabu Ohta

Proceedings of the 12th Australasian Database Conference 60 - 67 2001年

An Active Web-based Distributed Database System for E-Commerce. 査読

Hiroshi Ishikawa, Manabu Ohta

Proc. International Workshop on Web Dynamics 27 - 36 2001年

Project Xanadu: XML- and active-database-unified approach to distributed e-commerce 査読

H. Ishikawa, S. Yokoyama, S. Isshiki, M. Ohta

12th International Workshop on Database and Expert Systems Applications 833 - 837 2001年

要素名圧縮によるXMLデータ圧縮手法の提案－Simplified Element XML－査読

横山昌平, 太田学, 石川博

Proc. データベースとWeb情報システムに関するIPSJ DBS/ACM SIGMOD Japan Chapter/JSPS-RFTF AMCP合同シンポジウム（DBWeb2000） 331 - 337 2000年12月

Probabilistic Automaton Model for Fuzzy English-Text Retrieval. 査読

Manabu Ohta, Atsuhiro Takasu, Jun Adachi

4th European Conference on Digital Libraries (ECDL 2000), LNCS 1923 35 - 44 2000年9月

Reduction of expanded search terms for fuzzy English-text retrieval 査読

Manabu Ohta, Atsuhiro Takasu, Jun Adachi

International Journal on Digital Libraries 3 ( 2 ) 140 - 151 2000年

記述言語：英語掲載種別：研究論文（学術雑誌）

Optical character reader (OCR) misrecognition is a serious problem when OCR-recognized text is used for retrieval purposes in digital libraries. We have proposed fuzzy retrieval methods that, instead of correcting the errors manually, assume that errors remain in the recognized text. Costs are thereby reduced. The proposed methods generate multiple search terms for each input query term by referring to confusion matrices, which store all characters likely to be misrecognized and the respective probability of each misrecognition. The proposed methods can improve recall rates without decreasing precision rates. However, a few million search terms are occasionally generated in English-text fuzzy retrieval, giving an intolerable effect on retrieval speed. Therefore, this paper presents two remedies to reduce the number of generated search terms while maintaining retrieval effectiveness. One remedy is to restrict the number of errors included in each expanded search term, while the other is to introduce another validity value different to our conventional one. Experimental results indicate that the former remedy reduced the number of terms to about 50 and the latter to not more than 20. © 2000 Springer-Verlag.

DOI： 10.1007/s007999900014

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認識誤りを含む和文テキストにおける全文検索手法査読

太田学, 高須淳宏, 安達淳

情報処理学会論文誌 39 ( 3 ) 625 - 635 1998年3月