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Application of Discrete Wavelet Transform in Shapelet-Based Classification
Joint Authors
Yan, Lijuan
Liu, Yanshen
Liu, Yi
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-19
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Recently, several shapelet-based methods have been proposed for time series classification, which are accomplished by identifying the most discriminating subsequence.
However, for time series datasets in some application domains, pattern recognition on the original time series cannot always obtain ideal results.
To address this issue, we propose an ensemble algorithm by combining time frequency analysis and shape similarity recognition of time series.
Discrete wavelet transform is used to decompose the time series into different components, and the shapelet features are identified for each component.
According to the different correlations between each component and the original time series, an ensemble classifier is built by weighted majority voting, and the Monte Carlo method is used to search for optimal weight vector.
The comparative experiments and sensitivity analysis are conducted on 25 datasets from UCR Time Series Classification Archive, which is an important open dataset resource in time series mining.
The results show the proposed method has a better performance in terms of accuracy and stability than the compared classifiers.
American Psychological Association (APA)
Yan, Lijuan& Liu, Yanshen& Liu, Yi. 2020. Application of Discrete Wavelet Transform in Shapelet-Based Classification. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1196841
Modern Language Association (MLA)
Yan, Lijuan…[et al.]. Application of Discrete Wavelet Transform in Shapelet-Based Classification. Mathematical Problems in Engineering No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1196841
American Medical Association (AMA)
Yan, Lijuan& Liu, Yanshen& Liu, Yi. Application of Discrete Wavelet Transform in Shapelet-Based Classification. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1196841
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196841