arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1009.4241stat.MEstat.CO
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高斯过程单指标模型的计算机仿真实验

Gaussian process single-index models as emulators for computer experiments

Robert B. Gramacy, Heng Lian

摘要:

单指数模型(SIM)通过将参数(线性)投影与单变量非参数(非线性)回归模型相结合来提供简约的多维非线性回归。我们表明,一个特定的高斯过程(GP)制定是简单的工作和理想的模拟器,为某些类型的计算机实验,因为它可以优于典型的可分离的GP回归模型通常用于这种设置。我们的贡献集中在大幅简化,重新解释,然后推广最近提出的完全贝叶斯GP-SIM组合,然后说明其良好的性能合成数据和真实数据的计算机实验。在CRAN上发布的两个R软件包已经被增强,以便于在我们提出的模型下进行推理。

英文摘要:

A single-index model (SIM) provides for parsimonious multi-dimensional nonlinear regression by combining parametric (linear) projection with univariate nonparametric (non-linear) regression models. We show that a particular Gaussian process (GP) formulation is simple to work with and ideal as an emulator for some types of computer experiment as it can outperform the canonical separable GP regression model commonly used in this setting. Our contribution focuses on drastically simplifying, re-interpreting, and then generalizing a recently proposed fully Bayesian GP-SIM combination, and then illustrating its favorable performance on synthetic data and a real-data computer experiment. Two R packages, both released on CRAN, have been augmented to facilitate inference under our proposed model(s).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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