arXiv:2507.00641nlin.AOcs.LG2025-07被引 2

让物理规则自组织生成计算结构,无需预设网格和损失函数。

Hebbian Physics Networks: A Self-Organizing Computational Architecture Based on Local Physical Laws

  • 用局部残差驱动状态与权重共同演化,实现自适应物理建模。
  • 从随机初始条件出发,自动恢复守恒律并形成合理流场结构。
  • 适合研究物理规律与计算架构协同演化的领域,如流体力学模拟。

物理传输过程通过局部相互作用重新分配不平衡,同时保持守恒。传统求解器在刚性网格上施加固定离散算子来实现这种组织。我们提出赫布物理网络(HPN),一种用可塑传输几何替代刚性框架的计算范式。HPN 是图中节点上的物理状态与边上构成权重的耦合动力系统。残差——连续性、动量平衡或能量守恒的局部违反——作为热力学力,驱动状态与算子(即自适应权重)的联合演化。权重通过三因子赫布规则更新,我们证明其等价于残差能量的严格局部梯度下降。该机制保证热力学稳定性:接近平衡时,学习到的算子自然收敛为对称正定形式,严格再现昂萨格倒易关系而无需显式约束。远离平衡时,系统进行自组织搜索,以恢复全局强制性。与依赖全局损失函数施加物理规律的方法不同,HPN 内嵌守恒性:运输通过演化算子自身在局部恢复,无需全局泊松求解或反向传播目标。我们在标量扩散和不可压缩顶盖驱动腔流上验证了该框架,结果表明,从随机初始条件出发,物理一致的传输几何与流场结构仅通过残差驱动的局部适应即可自发形成。因此,HPN 将计算重新定义为热力学弛豫过程,其中构成几何与物理状态共同演化。

原文摘要 · Abstract (English)

Physical transport processes organize through local interactions that redistribute imbalance while preserving conservation. Classical solvers enforce this organization by applying fixed discrete operators on rigid grids. We introduce the Hebbian Physics Network (HPN), a computational framework that replaces this rigid scaffolding with a plastic transport geometry. An HPN is a coupled dynamical system of physical states on nodes and constitutive weights on edges in a graph. Residuals--local violations of continuity, momentum balance, or energy conservation--act as thermodynamic forces that drive the joint evolution of both the state and the operator (i.e. the adaptive weights). The weights adapt through a three-factor Hebbian rule, which we prove constitutes a strictly local gradient descent on the residual energy. This mechanism ensures thermodynamic stability: near equilibrium, the learned operator naturally converges to a symmetric, positive-definite form, rigorously reproducing Onsagerś reciprocal relations without explicit enforcement. Far from equilibrium, the system undergoes a self-organizing search for a transport topology that restores global coercivity. Unlike optimization-based approaches that impose physics through global loss functions, HPNs embed conservation intrinsically: transport is restored locally by the evolving operator itself, without a global Poisson solve or backpropagated objective. We demonstrate the framework on scalar diffusion and incompressible lid-driven cavity flow, showing that physically consistent transport geometries and flow structures emerge from random initial conditions solely through residual-driven local adaptation. HPNs thus reframe computation not as the solution of a fixed equation, but as a thermodynamic relaxation process where the constitutive geometry and physical state co-evolve.

物理信息自组织深度学习守恒律

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