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arXiv 2112.02206stat.MLcs.LGstat.AP
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基于隐映射高斯过程的数据融合

Data Fusion with Latent Map Gaussian Processes

University of California, Irvine(加州大学尔湾分校)

Nicholas Oune, Jonathan Tammer Eweis-Labolle, Ramin Bostanabad

摘要:

多保真度建模和校准是工程设计中普遍存在的数据融合任务。在本文中,我们介绍了一种新的方法的基础上潜在的地图高斯过程(LMGPs),使高效和准确的数据融合。在我们的方法中,我们将数据融合转换成一个潜在的空间学习问题,不同的数据源之间的关系自动学习。这种转换赋予我们的方法有吸引力的优势,如提高准确性,降低成本,灵活地联合融合任何数量的数据源,并能够可视化数据源之间的相关性。这种可视化允许用户检测模型形式错误或通过仅将LMGP拟合到良好相关的数据源子集来确定高保真仿真的最佳策略。我们还开发了一个新的核函数,使LMGP不仅建立一个概率多保真度代理,但也估计校准参数具有高精度和一致性。与现有技术相比,我们的方法的实现和使用相当简单,并且不太容易出现数值问题。我们展示了基于LMGP的数据融合的好处,通过比较其性能对竞争的方法在广泛的例子。

英文摘要:

Multi-fidelity modeling and calibration are data fusion tasks that ubiquitously arise in engineering design. In this paper, we introduce a novel approach based on latent-map Gaussian processes (LMGPs) that enables efficient and accurate data fusion. In our approach, we convert data fusion into a latent space learning problem where the relations among different data sources are automatically learned. This conversion endows our approach with attractive advantages such as increased accuracy, reduced costs, flexibility to jointly fuse any number of data sources, and ability to visualize correlations between data sources. This visualization allows the user to detect model form errors or determine the optimum strategy for high-fidelity emulation by fitting LMGP only to the subset of the data sources that are well-correlated. We also develop a new kernel function that enables LMGPs to not only build a probabilistic multi-fidelity surrogate but also estimate calibration parameters with high accuracy and consistency. The implementation and use of our approach are considerably simpler and less prone to numerical issues compared to existing technologies. We demonstrate the benefits of LMGP-based data fusion by comparing its performance against competing methods on a wide range of examples.

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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