arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1901.01322math.NAcs.NA
收藏

具有高分辨率变换的变换快照插值

Transformed Snapshot Interpolation with High Resolution Transforms

G. Welper

AI总结:

针对参数或随机双曲型 PDE 中的跳跃奇异性问题,本文提出在 transformed snapshot interpolation (TSI) 方法中采用高分辨率变换,引入在奇点附近具有适当行为的新离散化方法,并通过优化过程进行数值计算。

摘要:

在过去的几年中,已经开发出几种方法来处理参数或随机双曲型 PDE 中的跳跃奇异性。它们通常在执行成熟的降阶建模技术(如 reduced basis methods、POD 或简单的插值)之前,对物理空间中的 jump-sets 进行某种对齐。在当前文献中,变换在空间上通常是低分辨率的,主要是低阶多项式、Fourier 模式或常数位移。在本文中,我们讨论了最近一种方法——transformed snapshot interpolation (TSI)——中的高分辨率变换。我们引入了变换的一种新离散化方法,使其在奇点附近具有适当的行为,并考虑通过优化过程对其进行数值计算。

英文摘要:

In the last few years, several methods have been developed to deal with jump singularities in parametric or stochastic hyperbolic PDEs. They typically use some alignment of the jump-sets in physical space before performing well established reduced order modelling techniques such as reduced basis methods, POD or simply interpolation. In the current literature, the transforms are typically of low resolution in space, mostly low order polynomials, Fourier modes or constant shifts. In this paper, we discuss higher resolution transforms in one of the recent methods, the transformed snapshot interpolation (TSI). We introduce a new discretization of the transforms with an appropriate behaviour near singularities and consider their numerical computation via an optimization procedure.

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。

↑