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Electrical and Computer Engineering Publications

BWR nuclear power plant

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Bagged Ensemble Of Fuzzy C-Means Classifiers For Nuclear Transient Identification, Piero Baraldi, Roozbeh Razavi-Far, Enrico Zio May 2011

Bagged Ensemble Of Fuzzy C-Means Classifiers For Nuclear Transient Identification, Piero Baraldi, Roozbeh Razavi-Far, Enrico Zio

Electrical and Computer Engineering Publications

This paper presents an ensemble-based scheme for nuclear transient identification. The approach adopted to construct the ensemble of classifiers is bagging; the novelty consists in using supervised fuzzy C-means (FCM) classifiers as base classifiers of the ensemble. The performance of the proposed classification scheme has been verified by comparison with a single supervised, evolutionary-optimized FCM classifier with respect of the task of classifying artificial datasets. The results obtained indicate that in the cases of datasets of large or very small sizes and/or complex decision boundaries, the bagging ensembles can improve classification accuracy. Then, the approach has been applied to the …


Classifier-Ensemble Incremental-Learning Procedure For Nuclear Transient Identification At Different Operational Conditions, Piero Baraldi, Roozbeh Razavi-Far, Enrico Zio Apr 2011

Classifier-Ensemble Incremental-Learning Procedure For Nuclear Transient Identification At Different Operational Conditions, Piero Baraldi, Roozbeh Razavi-Far, Enrico Zio

Electrical and Computer Engineering Publications

An important requirement for the practical implementation of empirical diagnostic systems is the capability of classifying transients in all plant operational conditions. The present paper proposes an approach based on an ensemble of classifiers for incrementally learning transients under different operational conditions. New classifiers are added to the ensemble where transients occurring in new operational conditions are not satisfactorily classified. The construction of the ensemble is made by bagging; the base classifier is a supervised Fuzzy C Means (FCM) classifier whose outcomes are combined by majority voting. The incremental learning procedure is applied to the identification of simulated transients in …