NDLI: An indexing scheme for fast similarity search in large time series databases

Content Provider	IEEE Xplore Digital Library
Author	Keogh, E.J. Pazzani, M.J.
Copyright Year	1999
Description	Author affiliation: Dept. of Inf. & Comput. Sci., California Univ., Irvine, CA, USA (Keogh, E.J.)
Abstract	Addresses the problem of similarity searching in large time-series databases. We introduce a novel indexing algorithm that allows faster retrieval. The index is formed by creating bins that contain time series subsequences of approximately the same shape. For each bin, we can quickly calculate a lower bound on the distance between a given query and the most similar element of the bin. This bound allows us to search the bins in best-first order, and to prune some bins from the search space without having to examine the contents. Additional speedup is obtained by optimizing the data within the bins such that we can avoid having to compare the query to every item in the bin. We call our approach STB (Shape To Bit-vector) indexing, and experimentally validate it on space telemetry, medical and synthetic data, demonstrating approximately an order-of-magnitude speedup.
Starting Page	56
Ending Page	67
File Size	212676
Page Count	12
File Format	PDF
ISBN	0769500463
DOI	10.1109/SSDM.1999.787621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-07-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Indexing Databases Medical diagnostic imaging Extraterrestrial measurements Time measurement Shape Computer science Electronic switching systems Read only memory Telemetry
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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