Data mining technique for fast retrieval of similar waveforms in Fusion massive databases

Vega, J., Pereira, A., Portas, A., Dormido Canto, Sebastián, Farias Castro, Gonzalo Alberto, Dormido Canto, Raquel, Sánchez Moreno, José, Duro Carralero, Natividad, Santos, M., Sánchez, E. y Pajares, Gonzalo . (2008) Data mining technique for fast retrieval of similar waveforms in Fusion massive databases. Fusion Engineering and Design (v. 83, n.1), p. 132–139

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Título Data mining technique for fast retrieval of similar waveforms in Fusion massive databases
Autor(es) Vega, J.
Pereira, A.
Portas, A.
Dormido Canto, Sebastián
Farias Castro, Gonzalo Alberto
Dormido Canto, Raquel
Sánchez Moreno, José
Duro Carralero, Natividad
Santos, M.
Sánchez, E.
Pajares, Gonzalo
Materia(s) Informática
Resumen Fusion measurement systems generate similarwaveforms for reproducible behavior.Amajor difficulty related to data analysis is the identification, in a rapid and automated way, of a set of discharges with comparable behaviour, i.e. discharges with “similar” waveforms. Here we introduce a new technique for rapid searching and retrieval of “similar” signals. The approach consists of building a classification system that avoids traversing the whole database looking for similarities. The classification system diminishes the problem dimensionality (by means of waveform feature extraction) and reduces the searching space to just the most probable “similar” waveforms (clustering techniques). In the searching procedure, the input waveform is classified in any of the existing clusters. Then, a similarity measure is computed between the input signal and all cluster elements in order to identify the most similar waveforms. The inner product of normalized vectors is used as the similarity measure as it allows the searching process to be independent of signal gain and polarity. This development has been applied recently to TJ-II stellarator databases and has been integrated into its remote participation system.
Palabras clave fusion databases
similar waveforms
Editor(es) Elsevier
Fecha 2008-01-01
Formato application/pdf
Identificador Vega_etal2008
bibliuned:834
Publicado en la Revista Fusion Engineering and Design (v. 83, n.1), p. 132–139
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
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Creado: Tue, 15 Jan 2008, 11:09:27 CET