In this work, we present a machine learning approach for reducing the error when numerically solving time-dependent partial differential equations (PDE). We use a fully convolutional LSTM network to exploit the spatiotemporal dynamics of PDEs. The neural network serves to enhance finite-difference and finite-volume methods (FDM/FVM) that are commonly used to solve PDEs, allowing us to maintain guarantees on the order of convergence of our method. We train the network on simulation data, and show that our network can reduce error by a factor of 2 to 3 compared to the baseline algorithms. We demonstrate our method on three PDEs that each feature qualitatively different dynamics. We look at the linear advection equation, which propagates its initial conditions at a constant speed, the inviscid Burgers' equation, which develops shockwaves, and the Kuramoto-Sivashinsky (KS) equation, which is chaotic.

本文介绍了一种利用机器学习方法来减少时间依赖性偏微分方程数值求解误差的方法，使用全卷积LSTM网络来利用偏微分方程的时空动态性，提高常规有限差分和有限体积法的精度，并通过对模拟数据的训练和三个不同动态学特征的偏微分方程实例的演示，表明该方法与其他算法相比误差降低了2到3倍。

FiniteNet：一种用于时间相关偏微分方程的全卷积LSTM网络架构