Time stamping in the presence of latency and drift

  • Authors:
  • Gary R. Marrs;Ray J. Hickey;Michaela M. Black

  • Affiliations:
  • School of Computing and Engineering, University of Ulster, Coleraine, County Londonderry, N. Ireland;School of Computing and Engineering, University of Ulster, Coleraine, County Londonderry, N. Ireland;School of Computing and Engineering, University of Ulster, Coleraine, County Londonderry, N. Ireland

  • Venue:
  • ICAIS'11 Proceedings of the Second international conference on Adaptive and intelligent systems
  • Year:
  • 2011

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Abstract

Online classification learners operating under concept drift can be subject to latency in example arrival at the training base. The impact of such latency on the definition of a time stamp is discussed against the background of the Online Learning Life Cycle (OLLC). Data stream latency is modeled in Example Life-cycle Integrated Simulation Environment (ELISE). Two new algorithms are presented: CDTC versions 1 and 2, in which a specific time stamp protocol is used representing the time of classification. Comparison of these algorithms against previous time stamp learning algorithms CD3 and CD5 is made. A time stamp definition and algorithmic solution is presented for handling latency in data streams and improving classification recovery in such affected domains.