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arXiv 1807.11287astro-ph.IMcs.NAmath.NAstat.AP
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稀疏贝叶斯成像用于太阳耀斑

Sparse Bayesian Imaging of Solar Flares

Università di Genova(热那亚大学);CNR - SPIN Genova(意大利国家研究委员会自旋物理研究所热那亚分部)

Federica Sciacchitano, Silvio Lugaro, Alberto Sorrentino

AI总结:

本文提出了一种基于贝叶斯方法的稀疏成像技术,用于从NASA RHESSI数据中重建太阳耀斑图像,通过参数化方法和蒙特卡罗算法提高图像质量和参数不确定性量化。

摘要:

我们考虑将太阳耀斑成像视为参数化成像问题,其中耀斑被表示为有限数量的几何形状集合。我们建立了一个贝叶斯模型,其中构成图像的物体数量及其形状在事前是未知的。我们使用顺序蒙特卡罗算法来探索相应的后验分布。我们将该方法应用于合成和实验数据,这些数据在RHESSI社区中较为知名。该方法能够重建改进的太阳耀斑图像,并额外提供估计参数的不确定性量化。

英文摘要:

We consider imaging of solar flares from NASA RHESSI data as a parametric imaging problem, where flares are represented as a finite collection of geometric shapes. We set up a Bayesian model in which the number of objects forming the image is a priori unknown, as well as their shapes. We use a Sequential Monte Carlo algorithm to explore the corresponding posterior distribution. We apply the method to synthetic and experimental data, largely known in the RHESSI community. The method reconstructs improved images of solar flares, with the additional advantage of providing uncertainty quantification of the estimated parameters.

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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