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Practical and Rigorous Uncertainty Bounds for Gaussian Process Regression

AAAI 2021 · Probabilistic and scientific modeling › Uncertainty and Gaussian processes · approach: PAC-Bayes and decoupled GP learning · 48 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use the dataset-specific a-posteriori frequentist bound instead of a bound based on an upper bound of maximum information gainGaussian Process Regression · Nominal SE and Matern kernel experimentsuncertainty-set coverage: no violations in all repetitionsHelped
Use the nominal bound with an underestimated SE length-scale (0.2 in GPR; 0.5 for the target)Gaussian Process Regression · Benign SE kernel misspecificationuncertainty-set coverage: no violations in all repetitionsHelped
Use the nominal bound with an overestimated SE length-scale (0.5 in GPR; 0.2 for the target)Gaussian Process Regression · Problematic SE kernel misspecificationcoverage violation frequency: 2, 6, 12, 13 out of 50 functions for δ=0.1,0.01,0.001,0.0001Hurt
Use the robust kernel-mismatch bound rather than the nominal boundGaussian Process Regression under problematic kernel misspecification · Problematic SE kernel misspecificationuncertainty-set coverage: all functions being contained in the uncertainty set in all repetitionsHelped
Account for kernel mismatch using the robust boundGaussian Process Regression · Problematic SE kernel misspecificationuncertainty-set width: Mean: $71.68 \pm 5.36$ to $77.33 \pm 5.37$ across δ=0.1 to 0.0001Hurt
Use the a-posteriori bounds to construct learned disturbance sets in robust MPCLearning-based robust model predictive control · Mass-spring-damper control exampleprobabilistic control guarantees: δ:=0.001Helped

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