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• W3204777458 abstract "Multivariate Time Series Clustering (MVTS) is an essential task, especially for large and complex dataset, but it has received limited attention in the literature. We are motivated by a real-world problem: the need to cluster air pollution data to produce plausible imputations for missing measurements for some pollutants. Our main focus will be on the UK air quality assessments, the study uses data collected from automatic monitoring stations during four-year period (2015–2018). In this work, we propose a MVTS clustering method followed by an imputation methods for the whole Time Series (TS). We compare two approaches to cluster the stations: univariate TS clustering using Shape-Based Distance (SBD) for individual pollutants, and MVTS clustering using the fused similarity that combines the SBD for all the pollutants. We run a k-means algorithm to produce clusters with each approach on the same dataset. Our analysis shows that using MVTS clustering produces the best clusters as measured by various quality indexes and by the imputations they help to reduce the error average between imputed and real values based on the Root Mean Squared Error (RMSE) and its standard deviation (Std)." @default.
• W3204777458 created "2021-10-11" @default.
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• W3204777458 date "2022-06-01" @default.
• W3204777458 modified "2023-09-24" @default.
• W3204777458 title "A multi-variate time series clustering approach based on intermediate fusion: A case study in air pollution data imputation" @default.
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• W3204777458 doi "https://doi.org/10.1016/j.neucom.2021.09.079" @default.
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