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arXiv 2407.20155math.NAcs.NA
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利用李群对称性增强物理信息神经网络求解线性偏微分方程的基本解

Leveraging Lie Group Symmetries to Enhance Physics-Informed Neural Networks for the Fundamental Solution of Linear PDEs

Xiaopei Jiao, Fansheng Xiong

AI总结:

本文针对传统方法求解线性偏微分方程基本解的计算低效问题,提出结合李群对称性与物理信息神经网络(PINNs)的新方法,通过引入线性化对称条件降低计算成本并提升精度,还提供了识别不变无穷小生成元的无监督框架。

摘要:

自深度学习被引入求解偏微分方程(PDEs)以来,人们对实时系统响应的兴趣日益浓厚,其中核函数起着关键作用。物理信息神经网络(PINNs)作为一种流行的无网格半监督学习工具,具有高度灵活性。本文探索将李对称群与深度学习技术相结合,以增强基本PDEs的数值解。我们提出一种结合PINNs和李群理论的新方法,解决传统方法中的计算低效问题。通过将李对称性导出的线性化对称条件(LSC)纳入PINNs,我们引入了一种新的残差损失函数,其计算所需导数更少。这种整合降低了计算成本并提高了解的精度。数值模拟表明,在保持精度的同时,训练时间显著减少。此外,我们提供了一个为任意柯西问题识别不变无穷小生成元的框架。该无监督算法无需先验数值解,使其在各种应用中实用且高效。

英文摘要:

Since the introduction of deep learning for solving partial differential equations (PDEs), there has been growing interest in real-time system responses, where the kernel function plays a key role. Physics-informed neural networks (PINNs), a popular mesh-free, semi-supervised learning tool, offer high flexibility. This paper explores the integration of Lie symmetry groups with deep learning techniques to enhance the numerical solutions of fundamental PDEs. We propose a novel approach that combines PINNs and Lie group theory to address computational inefficiencies in traditional methods. By incorporating the linearized symmetric condition (LSC) derived from Lie symmetries into PINNs, we introduce a new residual loss function that requires fewer derivatives for calculation. This integration reduces computational costs and improves solution accuracy. Numerical simulations demonstrate a significant reduction in training time while maintaining accuracy. Additionally, we provide a framework for identifying invariant infinitesimal generators for arbitrary Cauchy problems. This unsupervised algorithm does not require prior numerical solutions, making it practical and efficient for various applications.

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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