Abstract
Although the Euclidean distance has been the most popular similarity measure in sequence databases, recent techniques prefer to use high-cost distance functions such as the time warping distance and the editing distance for wider applicability. However, if these distance functions are applied to the retrieval of similar subsequences, the number of subsequences to be inspected during the search is quadratic to the average length L~ of data sequences. We propose a novel subsequence matching scheme, called the aligned subsequence matching, where the number of subsequences to be compared with a query sequence is reduced to linear to L~. We also present an indexing technique to speed-up the aligned subsequence matching using the similarity measure of the modified time warping distance. Experiments on synthetic data sequences demonstrate the effectiveness of our proposed approach; ours consistently outperformed sequential scanning and achieved an up to 6.5 times speed-up.
Original language | English |
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Title of host publication | Proceedings - 1999 Workshop on Knowledge and Data Engineering Exchange, KDEX 1999 |
Editors | Peter Scheuermann |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 60-67 |
Number of pages | 8 |
ISBN (Electronic) | 0769504531, 9780769504537 |
DOIs | |
Publication status | Published - 1999 |
Event | 1999 Workshop on Knowledge and Data Engineering Exchange, KDEX 1999 - Chicago, United States Duration: 1999 Nov 7 → … |
Publication series
Name | Proceedings - 1999 Workshop on Knowledge and Data Engineering Exchange, KDEX 1999 |
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Other
Other | 1999 Workshop on Knowledge and Data Engineering Exchange, KDEX 1999 |
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Country/Territory | United States |
City | Chicago |
Period | 99/11/7 → … |
Bibliographical note
Publisher Copyright:© 1999 IEEE.
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Information Systems
- Information Systems and Management