One or High Dimensional Time-Series Clustering – Methods Comparison, Benchmarks and New Features Insights

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "Engineering Mathematics".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 1873

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Univ Lyon, UJM-Saint Etienne, INSA Lyon, DISP, F-69621 Villeurbanne, France
Interests: statistical signal processing; information geometry; topology; parametric subspace-based estimation; health-care systems; dynamical systems; complex networks

Special Issue Information

Dear Colleagues,

In many applications such as gene expression in biology, market analysis or portfolio building in finance, mechanics, telecommunication networks, speech processing, healthcare, the extraction and recognition of common patterns, the detection of anomalies, the definition and monitoring of processes, whether organizational or of production, can only be done by means of unsupervised clustering methods.

This Special Issue invites papers on the subject of clustering of one- or high-dimensional time series. We request papers incorporating new ideas, results, innovative and modern methodologies. Particular attention will be given to works exploiting the geometric or topological character of time series in their time, frequency, shape, statistical or any new representation. We also encourage submissions including new database benchmarks, comparison of methods, cluster number estimation or the definition of new performance evaluation criteria.

Prof. Dr. Guillaume Bouleux
Guest Editor

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Keywords

  • shape space
  • DTW
  • distances
  • manifolds
  • topology data analysis
  • networks
  • graphs
  • K-means
  • HDSCAN
  • K-nearest neighbors
  • V-measure score
  • Hopkins
  • high-dimensional time series
  • geodesics
  • data set UCR

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Published Papers (1 paper)

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Research

19 pages, 3615 KiB  
Article
Outlier Detection of Crowdsourcing Trajectory Data Based on Spatial and Temporal Characterization
by Xiaoyu Zheng, Dexin Yu, Chen Xie and Zhuorui Wang
Mathematics 2023, 11(3), 620; https://doi.org/10.3390/math11030620 - 26 Jan 2023
Cited by 3 | Viewed by 1399
Abstract
As an emerging type of spatio-temporal big data based on positioning technology and navigation devices, vehicle-based crowdsourcing data has become a valuable trajectory data resource. However, crowdsourcing trajectory data has been collected by non-professionals and with multiple measurement terminals, resulting in certain errors [...] Read more.
As an emerging type of spatio-temporal big data based on positioning technology and navigation devices, vehicle-based crowdsourcing data has become a valuable trajectory data resource. However, crowdsourcing trajectory data has been collected by non-professionals and with multiple measurement terminals, resulting in certain errors in data collection. In these cases, to minimize the impact of outliers and obtain relatively accurate trajectory data, it is crucial to detect and clean outliers. This paper proposes an efficient crowdsourcing trajectory outlier detection (CTOD) method that detects outliers from the trajectory sequence data in both spatial view and temporal view. Specifically, we first use the adaptive spatial clustering algorithm based on the Delaunay triangulation (ASCDT) algorithm to remove the location offset points in the trajectory sequence. After that, based on the most basic attributes of the trajectory points, a 6-dimensional movement feature vector is constructed for each point as an input. The feature-rich trajectory sequence data is reconstructed using the proposed temporal convolutional network autoencoder (TCN-AE), and the Squeeze-and-Excitation (SE) channel attention mechanism is introduced. Finally, the effectiveness of the CTOD method is experimentally verified. Full article
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