arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.03432stat.MLcs.LG
收藏

域感知高斯过程的高级平稳和非平稳核设计

Advanced Stationary and Non-Stationary Kernel Designs for Domain-Aware Gaussian Processes

Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);University of California, Berkeley(加州大学伯克利分校)

Marcus M. Noack, James A. Sethian

摘要:

高斯过程回归是一种应用广泛的函数逼近和不确定性量化方法。该技术由于其鲁棒性和可解释性最近在机器学习社区中流行起来。本文所讨论的数学方法是高斯过程框架的扩展。我们提出了先进的内核设计,只允许具有某些理想特性的功能是再生核希尔伯特空间(RKHS)的元素,所有的核方法的基础,并作为样本空间的高斯过程回归。这些理想的特性反映了基本的物理学;两个明显的例子是对称性和周期性约束。此外,可以在同一框架中定义非平稳核设计,以产生灵活的多任务高斯过程。我们将使用几个合成数据集和两个科学数据集来展示高级内核设计对高斯过程的影响。结果表明,包括领域知识,通过先进的内核设计进行沟通,对函数近似的准确性和相关性有显着的影响。

英文摘要:

Gaussian process regression is a widely-applied method for function approximation and uncertainty quantification. The technique has gained popularity recently in the machine learning community due to its robustness and interpretability. The mathematical methods we discuss in this paper are an extension of the Gaussian-process framework. We are proposing advanced kernel designs that only allow for functions with certain desirable characteristics to be elements of the reproducing kernel Hilbert space (RKHS) that underlies all kernel methods and serves as the sample space for Gaussian process regression. These desirable characteristics reflect the underlying physics; two obvious examples are symmetry and periodicity constraints. In addition, non-stationary kernel designs can be defined in the same framework to yield flexible multi-task Gaussian processes. We will show the impact of advanced kernel designs on Gaussian processes using several synthetic and two scientific data sets. The results show that including domain knowledge, communicated through advanced kernel designs, has a significant impact on the accuracy and relevance of the function approximation.

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。

↑