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dc.contributor.authorFang, Lei
dc.contributor.authorYe, Juan
dc.contributor.authorDobson, Simon Andrew
dc.identifier.citationFang , L , Ye , J & Dobson , S A 2020 , ' Discovery and recognition of emerging human activities using a hierarchical mixture of directional statistical models ' , IEEE Transactions on Knowledge and Data Engineering , vol. 32 , no. 7 , pp. 1304 - 1316 .
dc.identifier.otherPURE: 258157119
dc.identifier.otherPURE UUID: 29f365f1-7133-4211-9588-7217227a270b
dc.identifier.otherORCID: /0000-0002-2838-6836/work/68280955
dc.identifier.otherORCID: /0000-0001-9633-2103/work/70234151
dc.identifier.otherScopus: 85086429531
dc.identifier.otherWOS: 000543006000006
dc.descriptionFunding: UK EPSRC under grant number EP/N007565/1, “Science of Sensor Systems Software”.en
dc.description.abstractHuman activity recognition plays a significant role in enabling pervasive applications as it abstracts low-level noisy sensor data into high-level human activities, which applications can respond to. With more and more activity-aware applications deployed in real-world environments, a research challenge emerges - discovering and learning new activities that have not been pre-defined or observed in the training phase. This paper tackles this challenge by proposing a hierarchical mixture of directional statistical models. The model supports incrementally, continuously updating the activity model over time with the reduced annotation effort and without the need for storing historical sensor data. We have validated this solution on four publicly available, third-party smart home datasets, and have demonstrated up to 91.5 % accuracies of detecting and recognising new activities.
dc.relation.ispartofIEEE Transactions on Knowledge and Data Engineeringen
dc.rights© 2019, IEEE. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at
dc.subjectActivity recogntiionen
dc.subjectOnline learningen
dc.subjectIncremental learningen
dc.subjectActive learningen
dc.subjectSemi-supervised leardingen
dc.subjectMixture modelen
dc.subjectvon Mises-Fisher distributionen
dc.subjectHierarchical mixtureen
dc.subjectPervasive computingen
dc.subjectSmart homeen
dc.subjectQA75 Electronic computers. Computer scienceen
dc.subjectT Technologyen
dc.titleDiscovery and recognition of emerging human activities using a hierarchical mixture of directional statistical modelsen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Computer Scienceen
dc.description.statusPeer revieweden

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