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Title: Mixture of partial least squares experts and application in prediction settings with multiple operating modes
Authors: Souza, Francisco A. A. 
Araújo, Rui 
Keywords: Soft sensors; Mixture of experts; Partial least squares; Multiple modes; Mix-pls
Issue Date: 15-Jan-2014
Publisher: Elsevier
Citation: SOUZA, Francisco A. A.; ARAÚJO, Rui - Mixture of partial least squares experts and application in prediction settings with multiple operating modes. "Chemometrics and Intelligent Laboratory Systems". ISSN 0169-7439. Vol. 130 (2014) p. 192-202
Serial title, monograph or event: Chemometrics and Intelligent Laboratory Systems
Volume: 130
Abstract: This paper addresses the problem of online quality prediction in processes with multiple operating modes. The paper proposes a new method called mixture of partial least squares regression (Mix-PLS), where the solution of the mixture of experts regression is performed using the partial least squares (PLS) algorithm. The PLS is used to tune the model experts and the gate parameters. The solution of Mix-PLS is achieved using the expectation–maximization (EM) algorithm, and at each iteration of the EM algorithm the number of latent variables of the PLS for the gate and experts are determined using the Bayesian information criterion. The proposed method shows to be less prone to overfitting with respect to the number of mixture models, when compared to the standard mixture of linear regression experts (MLRE). The Mix-PLS was successfully applied on three real prediction problems. The results were compared with five other regression algorithms. In all the experiments, the proposed method always exhibits the best prediction performance.
ISSN: 0169-7439
DOI: 10.1016/j.chemolab.2013.11.006
Rights: openAccess
Appears in Collections:I&D ISR - Artigos em Revistas Internacionais
FCTUC Eng.Electrotécnica - Artigos em Revistas Internacionais

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