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International Conference on Innovative Techniques and Applications of Artificial Intelligence

SGAI 2019: Artificial Intelligence XXXVI pp 198–212Cite as

Motif Discovery in Long Time Series: Classifying Phonocardiograms

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Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 11927))

Abstract

A mechanism is presented for classifying phonocardiograms (PCGs) by interpreting PCGs as time series and using the concept of motifs, times series subsequences that are good discriminators of class, to support nearest neighbour classification. A particular challenge addressed by the work is that PCG time series are large which renders exact motif discovery to be computationally expensive; it is not realistic to compare every candidate time series subsequence with every other time series subsequence in order to discover exact motifs. Instead, a mechanism is proposed the firstly makes use of the cyclic nature of PCGs and secondly adopts a novel time series pruning mechanism. The evaluation, conducted using a canine PCG dataset, illustrated that the proposed approach produced the same classification accuracy but in a significantly more efficient manner.

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Author information

Authors and Affiliations

  1. Department of Computer Science, University of Liverpool, Liverpool, UK

    Hajar Alhijailan & Frans Coenen

  2. College of Computer and Information Sciences, King Saud University, Riyadh, Saudi Arabia

    Hajar Alhijailan

Authors
  1. Hajar Alhijailan
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  2. Frans Coenen
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Corresponding author

Correspondence to Hajar Alhijailan .

Editor information

Editors and Affiliations

  1. University of Portsmouth, Portsmouth, UK

    Max Bramer

  2. Middlesex University, London, UK

    Miltos Petridis

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Alhijailan, H., Coenen, F. (2019). Motif Discovery in Long Time Series: Classifying Phonocardiograms. In: Bramer, M., Petridis, M. (eds) Artificial Intelligence XXXVI. SGAI 2019. Lecture Notes in Computer Science(), vol 11927. Springer, Cham. https://doi.org/10.1007/978-3-030-34885-4_16

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  • DOI: https://doi.org/10.1007/978-3-030-34885-4_16

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  • Print ISBN: 978-3-030-34884-7

  • Online ISBN: 978-3-030-34885-4

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