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Clustering based on the geodesic distance on Gaussian manifolds for the automatic classification of disruptions

机译:基于高斯流形上的测地线距离进行聚类,以对干扰进行自动分类

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摘要

Over the last few years progress has been made on the front of disruption prediction in tokamaks. The less forgiving character of the new metallic walls at JET emphasized the importance of disruption prediction and mitigation. Being able not only to predict but also classify the type of disruption will enable one to better choose the appropriate mitigation strategy. From this perspective, a new clustering method, based on the geodesic distance on a probabilistic manifold, has been applied to the JET disruption database. This approach allows the error bars of the measurements to be taken into account and has proved to clearly outperform the more traditional classification methods based on the Euclidean distance. The developed technique with the highest success rate manages to identify the type of disruption with 85% confidence, several hundreds of ms before the thermal quench. Therefore, the combined use of this method and the more traditional disruption predictors would significantly improve the mitigation strategy on JET and could contribute to the definition of an optimized approach for ITER.
机译:在过去的几年中,托卡马克中断预测方面取得了进展。 JET新金属墙的宽容度较低,强调了中断预测和缓解的重要性。不仅能够预测干扰而且还能对干扰类型进行分类,将使人们能够更好地选择适当的缓解策略。从这个角度来看,一种基于概率流形上测地距离的新聚类方法已应用于JET干扰数据库。这种方法可以考虑测量的误差线,并已证明明显优于基于欧几里德距离的传统分类方法。成功率最高的已开发技术设法以85%的置信度(在热淬灭之前几百毫秒内)确定中断的类型。因此,将这种方法与更传统的干扰预测因子结合使用将大大改善JET的缓解策略,并有助于为ITER优化方法的定义。

著录项

  • 来源
    《Nuclear fusion》 |2013年第3期|033006.1-033006.9|共9页
  • 作者单位

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Consorzio RFX-Associazione EURATOM ENEA per la Fusione, 1-35127 Padova, Italy;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Ecole Polytechnique de Palaiseau, Paris, France;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Asociacion EURATOM/CIEMAT para Fusion. Avda. Complutense, 22. 28040 Madrid,Spain;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Associazione EURATOM-ENEA, University of Rome 'Tor Vergata', Roma, Italy;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Asociacion EURATOM/CIEMAT para Fusion. Avda. Complutense, 22. 28040 Madrid,Spain;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK Department of Applied Physics, Ghent University, Ghent, Belgium;

    JET-EFDA, Culham Science Centre, 0X14 3DB, Abingdon, UK FOM institute DIFFER, Association EURATOM-FOM, PO Box 1207, 3430BE Nieuwegein, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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