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Optica Publishing Group
  • Journal of Near Infrared Spectroscopy
  • Vol. 25,
  • Issue 1,
  • pp. 5-14
  • (2017)

Comparison of partial least squares regression, least squares support vector machines, and Gaussian process regression for a near infrared calibration

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Abstract

This paper investigates the use of least squares support vector machines and Gaussian process regression for multivariate spectroscopic calibration. The performances of these two non-linear regression models are assessed and compared to the traditional linear regression model, partial least squares regression on an agricultural example. The non linear models, least squares support vector machines, and Gaussian process regression, showed enhanced generalization ability, especially in maintaining homogeneous prediction accuracy over the range. The two non-linear models generally have similar prediction performance, but showed different features in some situations, especially when the size of the training set varies. This is due to fundamental differences in fitting criteria between these models.

© 2017 The Author(s)

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