Model reduction methods for nuclear emulators

Model reduction methods for nuclear emulators
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核模拟器的模型简化方法

DOI:
10.1088/1361-6471/ac83dd
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发表时间:
2022
期刊:
Journal of Physics G: Nuclear and Particle Physics
影响因子:
--
通讯作者:
Zhang, Xilin
Zhang, Xilin
中科院分区:
--
文献类型:
--
作者:
Melendez, J A;Drischler, C;Furnstahl, R J;Garcia, A J;Zhang, Xilin

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模型降阶(莫尔)领域的重要性日益增加,因为它能够从复杂的仿真中提取关键的见解,同时丢弃计算上繁重和多余的信息。我们提供了一个概述的莫尔方法的内存和计算密集型的核系统,专注于本征仿真器和变分仿真器的创建快速和准确的仿真器。作为一个例子,我们描述了如何“特征向量连续”是一个特殊的情况下,一个更普遍的和良好的研究莫尔形式主义的参数化系统。我们继续介绍了里兹和Galerkin投影方法,支持许多这样的仿真器,同时指出相关的莫尔理论及其成功的应用沿着。我们相信,本指南将为核物理学的更广泛应用打开大门,并促进与其他领域从业人员的交流。
The field of model order reduction (MOR) is growing in importance due to its ability to extract the key insights from complex simulations while discarding computationally burdensome and superfluous information. We provide an overview of MOR methods for the creation of fast & accurate emulators of memory-and compute-intensive nuclear systems, focusing on eigen-emulators and variational emulators. As an example, we describe how'eigenvector continuation'is a special case of a much more general and well-studied MOR formalism for parameterized systems. We continue with an introduction to the Ritz and Galerkin projection methods that underpin many such emulators, while pointing to the relevant MOR theory and its successful applications along the way. We believe that this guide will open the door to broader applications in nuclear physics and facilitate communication with practitioners in other fields.
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发表时间: 2022-02
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影响因子: 1.6
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