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Evaluating the squared-exponential covariance function in Gaussian processes with integral observations

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arxiv 1812.07319 v1 pith:HG5EHCEQ submitted 2018-12-18 stat.ML cs.LG

J.N. Hendriks , C. Jidling , A. Wills , T.B. Schön This is my paper · ORCID
classification stat.MLcs.LG
keywords integralfunctioncovariancedoublenumericalsingleaccuracyapproach
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This paper deals with the evaluation of double line integrals of the squared exponential covariance function. We propose a new approach in which the double integral is reduced to a single integral using the error function. This single integral is then computed with efficiently implemented numerical techniques. The performance is compared against existing state of the art methods and the results show superior properties in numerical robustness and accuracy per computation time.

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    A stochastic quasi-Newton method that learns the Hessian via Gaussian process regression from noisy gradient differences, combined with a stochastic Armijo line search, is demonstrated on nonlinear system identificati...

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