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arXiv 2402.15705stat.ME
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一种可扩展的变分贝叶斯方法用于拟合高维空间广义线性混合模型

A Scalable Variational Bayes Approach to Fit High-dimensional Spatial Generalized Linear Mixed Models

Jin Hyung Lee, Ben Seiyon Lee

AI总结:

本文提出两种基于半参数近似和并行计算的变分贝叶斯方法,用于高效拟合高维空间广义线性混合模型,在保持与MCMC相当性能的同时实现高达3600倍加速,并能在标准笔记本上处理数百万位置的数据。

摘要:

高斯和离散非高斯空间数据集在公共卫生、生态学、地球科学和社会科学等领域中普遍存在。贝叶斯空间广义线性混合模型(SGLMMs)是分析此类数据的一类灵活模型,但它们在扩展到大型数据集方面存在困难。许多可扩展的贝叶斯方法基于基表示或稀疏协方差矩阵,但仍依赖于通过马尔可夫链蒙特卡洛(MCMC)进行后验采样。变分贝叶斯(VB)方法已被应用于SGLMMs,但仅限于小型区域数据集。我们提出了两种计算高效的VB方法,用于在连续空间域中分析中等规模和大型(数百万个位置)的高斯和离散非高斯空间数据。我们的方法利用潜在空间过程的半参数近似和并行计算来确保计算效率。所提出的方法在推理和预测性能上与黄金标准的MCMC方法相当,同时实现了高达3600倍的计算加速。在大多数情况下,我们的VB方法优于最先进的替代方法,如INLA和哈密顿蒙特卡洛。我们通过比较数值研究和实际数据应用验证了我们的方法。这些VB方法可以使从业者在标准笔记本电脑上建模数百万个离散非高斯空间观测,显著扩大了对先进空间建模工具的访问。

英文摘要:

Gaussian and discrete non-Gaussian spatial datasets are common across fields like public health, ecology, geosciences, and social sciences. Bayesian spatial generalized linear mixed models (SGLMMs) are a flexible class of models for analyzing such data, but they struggle to scale to large datasets. Many scalable Bayesian methods, built upon basis representations or sparse covariance matrices, still rely on posterior sampling via Markov chain Monte Carlo (MCMC). Variational Bayes (VB) methods have been applied to SGLMMs, but only for small areal datasets. We propose two computationally efficient VB approaches for analyzing moderately sized and massive (millions of locations) Gaussian and discrete non-Gaussian spatial data in the continuous spatial domain. Our methods leverage semi-parametric approximations of latent spatial processes and parallel computing to ensure computational efficiency. The proposed methods deliver inferential and predictive performance comparable to gold-standard MCMC methods while achieving computational speedups of up to 3600 times. In most cases, our VB approaches outperform state-of-the-art alternatives such as INLA and Hamiltonian Monte Carlo. We validate our methods through a comparative numerical study and applications to real-world datasets. These VB approaches can enable practitioners to model millions of discrete non-Gaussian spatial observations on standard laptops, significantly expanding access to advanced spatial modeling tools.

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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