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• W3195156962 abstract "The interpretation of unlabeled acoustic emission (AE) data classically relies on general-purpose clustering methods. While several criteria have been used in the past to select the hyperparameters of those algorithms, few studies have paid attention to the development of dedicated objective functions in clustering methods able to cope with the specificities of AE data. We investigate how to explicitly represent clusters onsets in mixture models in general, and in Gaussian Mixture Models (GMM) in particular. We propose the first clustering method able to provide, through parameters estimated by an expectation–maximization procedure, information about when clusters occur (onsets), how they grow (kinetics) and their level of activation through time. This new objective function accommodates continuous timestamps of AE signals and, thus, their order of occurrence. The method, called GMMSEQ, is experimentally validated to characterize the loosening phenomenon in bolted structure under vibrations. A comparison with four standard clustering methods on raw streaming data from five experimental campaigns shows that GMMSEQ not only provides useful qualitative information about the timeline of clusters, but also shows better performance in terms of cluster characterization." @default.
• W3195156962 created "2021-08-30" @default.
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• W3195156962 date "2022-12-01" @default.
• W3195156962 modified "2023-10-16" @default.
• W3195156962 title "Clustering acoustic emission data streams with sequentially appearing clusters using mixture models" @default.
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• W3195156962 doi "https://doi.org/10.1016/j.ymssp.2022.109504" @default.
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