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arXiv 1611.05902stat.MEstat.CO
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用于大型模拟实验的实用异方差高斯过程建模

Practical heteroskedastic Gaussian process modeling for large simulation experiments

Mickael Binois, Robert B. Gramacy, Michael Ludkovski

摘要:

我们提出了一个统一的观点,基于似然高斯过程回归的模拟实验表现出依赖于输入的噪声。复制在这种情况下起着重要的作用,然而,以前的方法利用复制要么忽略了来自这样的设计的计算节省,或有捷径完全基于可能性的推理,以保持易处理。从homoskedastic过程开始,我们展示了如何多个应用程序的一个著名的伍德伯里身份促进推断下的所有参数的可能性(没有近似),绕过典型的全数据大小的计算。然后,我们从机器学习中借用潜变量的思想来解决异方差问题,使其在相同的节俭推理框架内工作,从而同时利用设计的计算和统计效率。其结果是一个推理方案,可以被描述为单一的目标函数,完成封闭形式的衍生物,快速库为基础的优化。插图提供,包括现实世界的模拟实验,从制造和流行病的管理。

英文摘要:

We present a unified view of likelihood based Gaussian progress regression for simulation experiments exhibiting input-dependent noise. Replication plays an important role in that context, however previous methods leveraging replicates have either ignored the computational savings that come from such design, or have short-cut full likelihood-based inference to remain tractable. Starting with homoskedastic processes, we show how multiple applications of a well-known Woodbury identity facilitate inference for all parameters under the likelihood (without approximation), bypassing the typical full-data sized calculations. We then borrow a latent-variable idea from machine learning to address heteroskedasticity, adapting it to work within the same thrifty inferential framework, thereby simultaneously leveraging the computational and statistical efficiency of designs with replication. The result is an inferential scheme that can be characterized as single objective function, complete with closed form derivatives, for rapid library-based optimization. Illustrations are provided, including real-world simulation experiments from manufacturing and the management of epidemics.

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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