Active Learning With Drifting Streaming Data | IEEE Journals & Magazine | IEEE Xplore

Active Learning With Drifting Streaming Data


Abstract:

In learning to classify streaming data, obtaining true labels may require major effort and may incur excessive cost. Active learning focuses on carefully selecting as few...Show More

Abstract:

In learning to classify streaming data, obtaining true labels may require major effort and may incur excessive cost. Active learning focuses on carefully selecting as few labeled instances as possible for learning an accurate predictive model. Streaming data poses additional challenges for active learning, since the data distribution may change over time (concept drift) and models need to adapt. Conventional active learning strategies concentrate on querying the most uncertain instances, which are typically concentrated around the decision boundary. Changes occurring further from the boundary may be missed, and models may fail to adapt. This paper presents a theoretically supported framework for active learning from drifting data streams and develops three active learning strategies for streaming data that explicitly handle concept drift. They are based on uncertainty, dynamic allocation of labeling efforts over time, and randomization of the search space. We empirically demonstrate that these strategies react well to changes that can occur anywhere in the instance space and unexpectedly.
Published in: IEEE Transactions on Neural Networks and Learning Systems ( Volume: 25, Issue: 1, January 2014)
Page(s): 27 - 39
Date of Publication: 17 January 2013

ISSN Information:

PubMed ID: 24806642

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