通过低秩结构压缩神经网络,加速物理信息神经网络求解。
FastLRNR and Sparse Physics Informed Backpropagation
- 利用低秩结构构建更小的近似网络,实现高效反向传播。
- 在求解参数化偏微分方程时,计算复杂度显著降低。
- 适合需要快速求解物理方程的科学计算场景。
我们提出了一种新的方法——稀疏物理信息反向传播(SPInProp),用于加速一种名为低秩神经表示(LRNR)的特殊神经网络架构的反向传播过程。该方法利用LRNR中的低秩特性,构建了一个尺寸大幅缩减的近似神经网络,称为FastLRNR。我们证明了用FastLRNR的反向传播替代原始LRNR的反向传播是可行的,从而实现了复杂度的显著降低。我们将SPInProp应用于物理信息神经网络框架,展示了其在加速参数化偏微分方程求解方面的有效性。
原文摘要 · Abstract (English)
We introduce Sparse Physics Informed Backpropagation (SPInProp), a new class of methods for accelerating backpropagation for a specialized neural network architecture called Low Rank Neural Representation (LRNR). The approach exploits the low rank structure within LRNR and constructs a reduced neural network approximation that is much smaller in size. We call the smaller network FastLRNR. We show that backpropagation of FastLRNR can be substituted for that of LRNR, enabling a significant reduction in complexity. We apply SPInProp to a physics informed neural networks framework and demonstrate how the solution of parametrized partial differential equations is accelerated.
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