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arXiv 2006.04141stat.APq-bio.QMstat.ME
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贝叶斯调整高斯:稳定多偶极子估计的连续高斯先验

Where Bayes tweaks Gauss: Conditionally Gaussian priors for stable multi-dipole estimation

Alessandro Viani, Gianvittorio Luria, Harald Bornfleth, Alberto Sorrentino

摘要:

我们提出了一个非常简单但功能强大的推广先前描述的模型和算法估计多个偶极子从磁/脑电图数据。具体而言,推广包括在一组条件线性/高斯变量的标准差上引入对数均匀超先验。我们使用数值模拟和实验数据集表明,近似的后验分布保持非常稳定的超参数的值范围很广,几乎消除了对超参数的依赖。

英文摘要:

We present a very simple yet powerful generalization of a previously described model and algorithm for estimation of multiple dipoles from magneto/electro-encephalographic data. Specifically, the generalization consists in the introduction of a log-uniform hyperprior on the standard deviation of a set of conditionally linear/Gaussian variables. We use numerical simulations and an experimental dataset to show that the approximation to the posterior distribution remains extremely stable under a wide range of values of the hyperparameter, virtually removing the dependence on the hyperparameter.

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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