publication:

Fault detection based on Gaussian process latent variable models (2011)

Author(s): Serradilla J, Shi JQ, Morris AJ

    Abstract: Gaussian processes, View the MathML source, can be used to approximate complex non-linear functions with relative simplicity. Their regression performance is, at least, comparable to that achieved via artificial neural networks (ANN) and, in fact, both methods are intrinsically related. They are both non-parametric and, as Neal (1994) [1] has shown, when the number of nodes in the hidden layer of a neural network tends to infinity the ANN converge to a Gaussian process.In most of the cases, the View the MathML source will map a multivariate input into a univariate response. In this paper, however, we present an approach to process monitoring that combines several View the MathML source so that multivariate responses can be appropriately modeled. We review a similar approach recently proposed in the literature and highlight some concerns related to it that needs to be taken into consideration. Additionally, we propose an alternative procedure to the way in which new observations are mapped into the non-linear model. A simulation study is provided that will help understand the method flexibility. Furthermore, results from a real example are also discussed.

      • Date: 23-07-2011
      • Journal: Chemometrics and Intelligent Laboratory Systems
      • Volume: 109
      • Issue: 1
      • Pages: 9-21
      • Publisher: Elsevier BV
      • Publication type: Article
      • Bibliographic status: Published
      Staff

      Dr Javier Serradilla
      Research Associate

      Dr Jian Shi
      Reader in Statistics