Chiwoo Park Robert Waelder Bonggwon Kang Benji Maruyama Soondo Hong Robert B. Gramacy Active Learning of Piecewise Gaussian Process Surrogates. 2026 January 186-201 68 Technometrics 1 https://doi.org/10.1080/00401706.2025.2561746 db/journals/technometrics/technometrics68.html#ParkWKMHG26 streams/journals/technometrics