arXiv:2505.11578cs.LGcs.AI2025-05

提出混合架构提升物理场生成的物理一致性与可解释性

Physics Consistency and Latent Dynamics in Spatiotemporal Physics Field Generation

  • 用Mamba-Transformer融合结构建模时空物理场,引入梯度查询机制
  • 实验显示物理残差降低,且预测误差与物理残差呈指数关系
  • 适合关注物理模型可解释性与数值准确性的研究人员

面向流场、声场等时空物理场生成的数据驱动模型常偏离控制方程,且隐空间时间动态缺乏可解释性。为此,我们提出HMT-PF——一种融合Mamba与Transformer的混合架构。该框架引入基于查询的梯度计算机制和物理信息微调策略,增强物理一致性。对隐空间分析发现,初始隐状态在Mamba主干下演化为自主动力系统;主成分分析(PCA)表明初始隐状态中少数主导模式决定物理场关键演化特征;雅可比矩阵的时间敏感性分析揭示了隐空间演化的内在结构与稳定性。在五个基准数据集上的实验验证了强性能,物理信息微调进一步降低物理残差。我们发现预测误差与物理残差存在经验尺度律,在低误差区域呈现一致的指数关系。据此提出双指标评估框架,联合衡量数值精度与物理真实性。

原文摘要 · Abstract (English)

Data-driven models for spatiotemporal physical field generation, such as flow and acoustic fields, often deviate from governing equations and lack interpretability in latent temporal dynamics. To address these challenges, we propose HMT-PF, a hybrid Mamba-Transformer architecture for physical field generation. The framework incorporates a query-based gradient computation mechanism and a physics-informed fine-tuning strategy to enhance physical consistency. Analysis of the latent space reveals that the initial latent state vector evolves as an autonomous dynamical system under the Mamba backbone. Principal component analysis (PCA) indicates that a small number of dominant modes in initial latent state vector govern the key evolution patterns of the physical field, while a Jacobian-based temporal sensitivity analysis characterizes the intrinsic dynamical structure and stability of the latent evolution. Experiments across five benchmark datasets demonstrate strong performance, and physics-informed fine-tuning further reduces physical residuals, highlighting the effectiveness of the proposed latent-level fusion strategy. An empirical scaling law between prediction error and physical residual is identified, revealing a consistent exponential relationship in the low-error regime. Based on this observation, an dual-metric framework is proposed to jointly evaluate numerical accuracy and physical realism.

物理场生成隐空间动力学Mamba-Transformer物理一致性

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