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arXiv 2409.03239cs.LGcs.AIphysics.comp-ph
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用于物理信息神经网络的DiffGrad

DiffGrad for Physics-Informed Neural Networks

Jiangsu University(江苏大学);Govt College University, Lahore(拉合尔政府学院大学)

Jamshaid Ul Rahman, Nimra

AI总结:

本文提出将DiffGrad优化器与物理信息神经网络(PINNs)结合求解Burgers方程,利用当前与前一梯度之差提升性能,实验表明该方法在提高求解精度的同时缩短了训练时间。

摘要:

物理信息神经网络(PINNs)被视为解决基于偏微分方程的高度非线性问题的最先进工具。尽管其应用范围广泛,PINNs仍面临若干性能挑战,包括效率问题、计算成本的最小化以及精度的提升。Burgers方程是流体动力学中的一个基本方程,在PINNs中被广泛使用,使用不考虑过去梯度的Adam优化器时能提供灵活的结果。本文提出了一种新的策略,通过将DiffGrad与PINNs相结合来求解Burgers方程,该方法利用当前梯度与紧邻的前一个梯度之间的差异来提升性能。使用Adam、Adamax、RMSprop和DiffGrad等优化器进行了全面的计算分析,以评估和比较它们的有效性。我们的方法包括在不同时间间隔上对空间解进行可视化,以展示网络的精度。结果表明,与其他优化器相比,DiffGrad不仅提高了求解精度,还缩短了训练时间。

英文摘要:

Physics-Informed Neural Networks (PINNs) are regarded as state-of-the-art tools for addressing highly nonlinear problems based on partial differential equations. Despite their broad range of applications, PINNs encounter several performance challenges, including issues related to efficiency, minimization of computational cost, and enhancement of accuracy. Burgers' equation, a fundamental equation in fluid dynamics that is extensively used in PINNs, provides flexible results with the Adam optimizer that does not account for past gradients. This paper introduces a novel strategy for solving Burgers' equation by incorporating DiffGrad with PINNs, a method that leverages the difference between current and immediately preceding gradients to enhance performance. A comprehensive computational analysis is conducted using optimizers such as Adam, Adamax, RMSprop, and DiffGrad to evaluate and compare their effectiveness. Our approach includes visualizing the solutions over space at various time intervals to demonstrate the accuracy of the network. The results show that DiffGrad not only improves the accuracy of the solution but also reduces training time compared to the other optimizers.

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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