arXiv:2504.08769math.OCcs.AI2025-04被引 1

提出高阶微分框架,让神经微分方程的动态更可解释。

High-order expansion of Neural Ordinary Differential Equations flows

  • 用高阶微分构建事件流形上的动力学描述
  • 在捕食者-猎物、最优反馈等系统中提升可解释性
  • 适合关注模型透明度与复杂系统分析的研究者

人工神经网络正重塑常微分方程(ODE)研究,将数据驱动建模与经典动力系统结合,推动无限深神经模型的发展。然而,这些模型的动态过程常被视为黑箱,缺乏可解释性,制约实际应用。现有分析方法多受限于一阶梯度信息,深度不足。本文提出事件转移张量(Event Transition Tensors),基于高阶微分,为神经ODE在事件流形上的动态提供严格数学描述。该方法在数据驱动的捕食者-猎物控制模型中刻画不确定性,在神经最优反馈动力学中进行分析,并映射三体神经哈密顿系统的着陆轨迹。结果表明,该框架通过显式数学结构显著提升神经ODE的可解释性与理论严谨性,为事件触发的神经微分方程奠定更深层理论基础。

原文摘要 · Abstract (English)

Artificial neural networks, widely recognised for their role in machine learning, are now transforming the study of ordinary differential equations (ODEs), bridging data-driven modelling with classical dynamical systems and enabling the development of infinitely deep neural models. However, the practical applicability of these models remains constrained by the opacity of their learned dynamics, which operate as black-box systems with limited explainability, thereby hindering trust in their deployment. Existing approaches for the analysis of these dynamical systems are predominantly restricted to first-order gradient information due to computational constraints, thereby limiting the depth of achievable insight. Here, we introduce Event Transition Tensors, a framework based on high-order differentials that provides a rigorous mathematical description of neural ODE dynamics on event manifolds. We demonstrate its versatility across diverse applications: characterising uncertainties in a data-driven prey-predator control model, analysing neural optimal feedback dynamics, and mapping landing trajectories in a three-body neural Hamiltonian system. In all cases, our method enhances the interpretability and rigour of neural ODEs by expressing their behaviour through explicit mathematical structures. Our findings contribute to a deeper theoretical foundation for event-triggered neural differential equations and provide a mathematical construct for explaining complex system dynamics.

神经微分方程可解释性高阶微分动力系统

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