论文标题
学习二阶耦合的微分方程,这些方程受非保守力的影响
Learning second order coupled differential equations that are subject to non-conservative forces
论文作者
论文摘要
在本文中,我们解决了一个问题,是否可以从仅观察其真实空间轨迹(IES)的观察结果,以描述由非保守力的动态系统的物理特性的微分方程。我们引入了一个网络,该网络在卷积块之间的残留连接方面结合了二阶导数的差近似值,卷积块之间的残留连接表示,其共享权重代表二阶普通微分方程的系数。我们进一步将这种类似求解器的架构与卷积网络相结合,能够学习耦合振荡器的轨迹之间的关系,因此即使仅观察到系统,也可以使我们进行稳定的预测。我们在共享权重的同时,将此地图与求解器网络一起优化,以形成一个强大的框架,能够学习耗散动力学系统的复杂物理特性。
In this article we address the question whether it is possible to learn the differential equations describing the physical properties of a dynamical system, subject to non-conservative forces, from observations of its realspace trajectory(ies) only. We introduce a network that incorporates a difference approximation for the second order derivative in terms of residual connections between convolutional blocks, whose shared weights represent the coefficients of a second order ordinary differential equation. We further combine this solver-like architecture with a convolutional network, capable of learning the relation between trajectories of coupled oscillators and therefore allows us to make a stable forecast even if the system is only partially observed. We optimize this map together with the solver network, while sharing their weights, to form a powerful framework capable of learning the complex physical properties of a dissipative dynamical system.