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Drift Detector for Memory-Constrained Environments

  • Timothy D. Robinson
  • David Tse Jung Huang
  • Yun Sing Koh
  • Gillian Dobbie
Conference paper
  • 1.5k Downloads
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8646)

Abstract

Current approaches to drift detection assume that stable memory consumption with slight variations with each stream is suitable for all programs. This is not always the case and there are situations where small variations in memory are undesirable such as drift detectors on medical vital sign monitoring systems. Under these circumstances, it is not sufficient to have a memory use that is predictable on average, but instead memory use must be fixed. To detect drift using fixed memory in a stream, we propose DualWin: a technique that keeps two samples of controllable size, one is stored in a sliding window, which represents the most recent stream elements, and the other is stored in a reservoir, which uses reservoir sampling to maintain an image of the stream since the previous drift was detected. Through experimentation, we find that DualWin obtains a rate of true positive detection which is comparable to ADWIN2, a rate of false positive detection which is much lower, an execution time which is faster, and a fixed memory consumption.

Keywords

Data Streams Drift Detection Fixed Memory Reservoir Sampling 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Timothy D. Robinson
    • 1
  • David Tse Jung Huang
    • 1
  • Yun Sing Koh
    • 1
  • Gillian Dobbie
    • 1
  1. 1.Dept. of Computer ScienceThe University of AucklandNew Zealand

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