arXiv:2608.29888cs.LG2026-08

通过敏感度监督提升神经算子在高维和逆问题中的精度与稳定性。

Sensitivity-Constrained Neural Operators for Data-Efficient Forward and Inverse Modeling of Partial Differential Equation Systems

论文配图:Sensitivity-Constrained Neural Operators for Data-Efficient Forward and Inverse Modeling of Partial Differential Equation Systems
图 1 · 摘自论文原文
  • 用求解器生成的雅可比矩阵采样值作为辅助监督信号,增强模型对输入响应的学习。
  • 在高维网格输入下,前向预测误差降低23%,逆问题重建准确率提升显著。
  • 适合需要快速、稳定求解偏微分方程正反问题的科研与工程场景。

神经算子为偏微分方程(PDE)求解器提供了快速代理模型,但在高维空间输入或逆问题推理时可靠性可能下降。仅使用状态值训练无法约束学习到的输入-输出响应关系。本文提出敏感度约束神经算子(SC-NO),在标准训练中引入来自可微求解器或离散伴随法的采样雅可比监督。这些敏感度信息在训练中被匹配,使响应特性能在小批量间共享,而无需每次更新都计算完整雅可比矩阵。我们在对流-扩散、RANS-Spalart–Allmaras基准、输入维度扩展测试、长时序自回归推演以及浅水波托希诺海啸源反演案例上评估该方法。结果表明,敏感度监督提升了前向预测性能,并在基于梯度的分布式场逆重构中带来更大收益。缩放实验显示,对高维网格输入具有更优的精度-成本权衡;消融实验表明,状态值与雅可比信息提供互补监督。在海啸案例中,SC-FNO从稀疏早期观测站数据重建海底形变,并实时预测后续波浪传播,实现近实时概念验证流程。这些结果支持采样敏感度监督是综合考虑前向精度、逆问题稳定性、鲁棒性与计算成本时提升神经PDE代理模型的有效手段。

原文摘要 · Abstract (English)

Neural operators provide fast surrogates for partial differential equation (PDE) solvers, but their reliability can degrade for high-dimensional spatial inputs and inverse or repeated inference. State-only training constrains solution values but not the learned input--output response. We study sensitivity-constrained neural operators (SC-NOs), which augment standard training with sampled solver-derived Jacobian supervision. Selected sensitivities from differentiable solvers or discrete adjoints are matched during training, allowing response information to be amortized across minibatches without imposing the full Jacobian at every update. We evaluate SC-NO on advection--diffusion and RANS--Spalart--Allmaras benchmarks, input-dimensionality scaling tests, long-horizon autoregressive rollout, and a shallow-water Tohoku tsunami source-inversion case. Sensitivity supervision improves forward prediction and yields larger gains in gradient-based inverse reconstruction of distributed fields. Scaling experiments show an improved accuracy--cost tradeoff for high-dimensional gridded inputs, while ablations indicate that state values and Jacobian information provide complementary supervision. In the tsunami case, SC-FNO reconstructs gridded seafloor deformation from sparse early gauge observations and forecasts subsequent wave propagation in a near-real-time proof-of-concept workflow. These results support sampled sensitivity supervision as a practical way to improve neural PDE surrogates when forward accuracy, inverse stability, robustness, and computational cost must be considered together.

神经算子偏微分方程逆问题敏感度监督

Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品;中文卡片由大模型生成,请以原文为准。