H/L transition time estimation in JET using conformal predictors

S. González, J. Vega, A. Murari, A. Pereira, S. Dormido-Canto, J.M. Ramírez

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Abstract

Recent advances in data mining allow the automatic recognition of physical phenomena in the databases of fusion devices without human intervention. This is important to create large databases of physical events (thereby increasing the statistical relevance) in an unattended manner. Important examples are the L/H and H/L transitions. In this contribution, a novel technique is introduced to automatically locate H/L transitions in JET by using conformal predictors. The focus is on H/L transitions because typically there is not a clear signature in the time series of the most widely available signals to recognize the change of confinement. Conformal predictors hedge their prediction by means of two parameters: confidence and credibility. The technique has been based on binary supervised classifiers to separate the samples of the respective confinement modes. Results with several underlying classifiers are presented. © 2012 EURATOM.
Original languageEnglish
Pages (from-to)2084 - 2086
Number of pages3
JournalFusion Engineering and Design
Volume87
Issue number12
DOIs
Publication statusPublished - Dec 2012
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

González, S., Vega, J., Murari, A., Pereira, A., Dormido-Canto, S., & Ramírez, J. M. (2012). H/L transition time estimation in JET using conformal predictors. Fusion Engineering and Design, 87(12), 2084 - 2086. https://doi.org/10.1016/j.fusengdes.2012.02.126