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Mathematical Research at the University of Cambridge

 

We consider hierarchical Gaussian process regression, where hyper-parameters appearing in the mean and covariance structure of the Gaussian process emulator are a priori unknown, and are learnt from the data, along with the posterior mean and covariance. We work in the framework of empirical Bayes, where a point estimate of the hyper-parameters is computed, using the data, and then used within the standard Gaussian process prior to posterior update. Using results from scattered data approximation, we provide a convergence analysis of the method applied to a fixed, unknown function of interest. Finally, we consider the use of Gaussian process emulators to approximate the mathematical model in an inverse problem, and discuss related stability properties.

Further information

Time:

31Jan
Jan 31st 2020
14:00 to 15:00

Venue:

MR12

Speaker:

Aretha Teckentrup, University of Edinburgh

Series:

Statistics