arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2103.02721stat.COstat.ME
收藏

集成套式拉普拉斯近似的重要性抽样

Importance Sampling with the Integrated Nested Laplace Approximation

Martin Outzen Berild, Sara Martino, Virgilio Gómez-Rubio, Håvard Rue

摘要:

集成嵌套拉普拉斯近似(INLA)是一种确定性的隐高斯模型(LGM)上的贝叶斯推断方法,并且专注于模型中参数的后验边缘的快速和准确的近似。最近,已经开发出的方法来扩展这一类的模型,可以表示为有条件的LGM固定的模型中的一些参数的描述值。这些方法在选择描述性数值的方式上有所不同。本文提出了将重要性抽样与INLA相结合的方法(IS-INLA),并将其扩展为鲁棒性更强的自适应多重重要性抽样与INLA相结合的算法(Vdd-INLA)。本文给出了这些方法和现有的方法之间的一系列应用程序与模拟和观测数据集的比较,并评估其性能的基础上的准确性,效率和鲁棒性。在一个简单的双变量线性模型中的精确后验的方法进行验证,然后,他们被应用到贝叶斯套索模型,缺失协变量值的贝叶斯插补,最后,在参数贝叶斯分位数回归。应用表明,Vdd-INLA方法,在一般情况下,优于其他方法,但IS-INLA算法可以考虑更快的推理时,好的建议。

英文摘要:

The Integrated Nested Laplace Approximation (INLA) is a deterministic approach to Bayesian inference on latent Gaussian models (LGMs) and focuses on fast and accurate approximation of posterior marginals for the parameters in the models. Recently, methods have been developed to extend this class of models to those that can be expressed as conditional LGMs by fixing some of the parameters in the models to descriptive values. These methods differ in the manner descriptive values are chosen. This paper proposes to combine importance sampling with INLA (IS-INLA), and extends this approach with the more robust adaptive multiple importance sampling algorithm combined with INLA (AMIS-INLA). This paper gives a comparison between these approaches and existing methods on a series of applications with simulated and observed datasets and evaluates their performance based on accuracy, efficiency, and robustness. The approaches are validated by exact posteriors in a simple bivariate linear model; then, they are applied to a Bayesian lasso model, a Bayesian imputation of missing covariate values, and lastly, in parametric Bayesian quantile regression. The applications show that the AMIS-INLA approach, in general, outperforms the other methods, but the IS-INLA algorithm could be considered for faster inference when good proposals are available.

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。

↑