Journal
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
Volume 33, Issue 3, Pages 1299-1309Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNNLS.2020.3041684
Keywords
Predictive models; Memory management; Data models; Monitoring; Prediction algorithms; Detectors; Training; Clustering in the model space; concept drift; diversity; online ensemble learning; recurring concepts
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/R006660/2]
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This study proposes using diversity as a framework to handle multiple types of concept drift and utilizes clustering in the model space to build a diverse ensemble and identify recurring concepts, thereby accelerating the adaptation to new concepts. Experimental results show that the framework usually achieves similar or better predictive accuracy compared to existing approaches in data streams with different types of drift.
Data stream applications usually suffer from multiple types of concept drift. However, most existing approaches are only able to handle a subset of types of drift well, hindering predictive performance. We propose to use diversity as a framework to handle multiple types of drift. The motivation is that a diverse ensemble can not only contain models representing different concepts, which may be useful to handle recurring concepts, but also accelerate the adaptation to different types of concept drift. Our framework innovatively uses clustering in the model space to build a diverse ensemble and identify recurring concepts. The resulting diversity also accelerates adaptation to different types of drift where the new concept shares similarities with past concepts. Experiments with 20 synthetic and three real-world data streams containing different types of drift show that our diversity framework usually achieves similar or better prequential accuracy than existing approaches, especially when there are recurring concepts or when new concepts share similarities with past concepts.
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