A Reproducing Kernel Hilbert Space Approach to Functional Calibration of Computer Models
A Reproducing Kernel Hilbert Space Approach to Functional Calibration of Computer Models
复制标题
计算机模型功能校准的再现核希尔伯特空间方法
DOI:
10.1080/01621459.2021.1956938
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发表时间:
2021-07
影响因子:
3.7
通讯作者:
Huang Jianhua Z.
中科院分区:
文献类型:
--
作者:
Tuo Rui;He Shiyuan;Pourhabib Arash;Ding Yu;Huang Jianhua Z.
Abstract This article develops a frequentist solution to the functional calibration problem, where the value of a calibration parameter in a computer model is allowed to vary with the value of control variables in the physical system. The need of functional calibration is motivated by engineering applications where using a constant calibration parameter results in a significant mismatch between outputs from the computer model and the physical experiment. Reproducing kernel Hilbert spaces (RKHS) are used to model the optimal calibration function, defined as the functional relationship between the calibration parameter and control variables that gives the best prediction. This optimal calibration function is estimated through penalized least squares with an RKHS-norm penalty and using physical data. An uncertainty quantification procedure is also developed for such estimates. Theoretical guarantees of the proposed method are provided in terms of prediction consistency and consitency of estimating the optimal calibration function. The proposed method is tested using both real and synthetic data and exhibits more robust performance in prediction and uncertainty quantification than the existing parametric functional calibration method and a state-of-art Bayesian method.
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