arXiv:2410.17135astro-ph.IMcs.LG2024-10中稿 · publication in The…

用强化学习自动优化射电干涉数据校准流程,提升处理效率与准确性。

Reinforcement Learning for Data-Driven Workflows in Radio Interferometry. I. Principal Demonstration in Calibration

  • 基于强化学习构建数据驱动的决策系统,自动选择最优校准流程
  • 在真实数据上验证了自动化流程优于传统人工经验方案
  • 适合射电天文数据处理人员及自动化算法研究者参考

射电干涉测量是一种用于研究天体物理现象的观测技术。干涉仪获取的数据需经过大量处理才能提取科学信息。数据处理包含一系列校准与分析步骤,需在步骤顺序和具体配置间做出选择。这些选择通常依赖数据特征、仪器理解、计算成本与精度的权衡,以及对最佳实践的经验认知。由于缺乏绝对正确的标准,结果常依赖主观判断。当前的流程训练主要通过工作坊传授。本文旨在利用客观指标量化最佳实践,并以数值方式描绘决策空间。基于这些指标,我们展示了可自动序列化最优操作的数据驱动决策系统。本文简要介绍干涉测量原理及数据处理流程,指出现有自动化方法的局限性,并提出解决方案。演示了一个原型系统并讨论了结果。

原文摘要 · Abstract (English)

Radio interferometry is an observational technique used to study astrophysical phenomena. Data gathered by an interferometer requires substantial processing before astronomers can extract the scientific information from it. Data processing consists of a sequence of calibration and analysis procedures where choices must be made about the sequence of procedures as well as the specific configuration of the procedure itself. These choices are typically based on a combination of measurable data characteristics, an understanding of the instrument itself, an appreciation of the trade-offs between compute cost and accuracy, and a learned understanding of what is considered "best practice". A metric of absolute correctness is not always available and validity is often subject to human judgment. The underlying principles and software configurations to discern a reasonable workflow for a given dataset is the subject of training workshops for students and scientists. Our goal is to use objective metrics that quantify best practice, and numerically map out the decision space with respect to our metrics. With these objective metrics we demonstrate an automated, data-driven, decision system that is capable of sequencing the optimal action(s) for processing interferometric data. This paper introduces a simplified description of the principles behind interferometry and the procedures required for data processing. We highlight the issues with current automation approaches and propose our ideas for solving these bottlenecks. A prototype is demonstrated and the results are discussed.

射电天文强化学习数据处理

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