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 2601.20172cs.LGphysics.comp-ph
收藏

损失景观几何与对称性的学习:或者,影响函数揭示了关于鲁棒泛化的影响

Loss Landscape Geometry of Partial Differential Equation Emulators: Or, Symmetry Learning via Gradient Alignment

Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室)

James Amarel, Robyn Miller, Nicolas Hengartner, Benjamin Migliori, Emily Casleton, Alexei Skurikhin, Earl Lawrence, Gerd J. Kunde

AI总结:

本文提出了一种基于影响函数的诊断方法,用于评估神经网络是否内化了偏微分方程解算子的对称性特性。

摘要:

我们研究神经网络偏微分方程解算子模拟器如何内化物理对称性,通过引入一种基于影响的诊断方法,该方法测量在对称相关状态之间参数更新的传播,定义为度量加权的损失梯度沿群轨道评估的重叠。该量值探测了学习损失景观的局部几何结构,并超越了前向传递等价性测试,直接评估学习动态是否耦合物理等价配置。将我们的诊断应用于自回归流体流动模拟器,我们发现轨道梯度一致性提供了学习泛化过对称变换的机制,并指示训练选择了一个与对称性兼容的盆地。结果是一种新颖的技术,用于评估替代模型是否内化了已知解算子的对称性属性。

英文摘要:

We study how neural emulators of partial differential equation solution operators internalize physical symmetries by introducing an influence-based diagnostic that measures the propagation of parameter updates between symmetry-related states, defined as the metric-weighted overlap of loss gradients evaluated along group orbits. This quantity probes the local geometry of the learned loss landscape and goes beyond forward-pass equivariance tests by directly assessing whether learning dynamics couple physically equivalent configurations. Applying our diagnostic to autoregressive fluid flow emulators, we show that orbit-wise gradient coherence provides the mechanism for learning to generalize over symmetry transformations and indicates when training selects a symmetry compatible basin. The result is a novel technique for evaluating if surrogate models have internalized symmetry properties of the known solution operator.

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。

↑