一种用于非线性滤波问题的基于能量的深度分裂方法
An energy-based deep splitting method for the nonlinear filtering problem
AI总结:
本文提出一种结合基于能量模型的深度分裂方法求解 Zakai 方程,用于非线性滤波问题,无需重新训练即可快速处理新观测,在多组线性与非线性示例中表现出色。
摘要:
本文旨在探索深度学习在求解非线性滤波问题中的应用。这是通过深度分裂方法求解 Zakai 方程实现的,该方法此前被开发用于近似求解(随机)偏微分方程。此方法结合了基于能量的模型,通过深度神经网络逼近函数。这产生了一种计算快速的滤波器,它以观测为输入,且在接收到新观测时无需重新训练。该方法在四个示例上进行了测试:两个一维和二十维的线性示例,以及两个一维非线性示例。与 Kalman 滤波器和 bootstrap 粒子滤波器进行基准测试时,该方法展现出有前景的性能。
英文摘要:
The purpose of this paper is to explore the use of deep learning for the solution of the nonlinear filtering problem. This is achieved by solving the Zakai equation by a deep splitting method, previously developed for approximate solution of (stochastic) partial differential equations. This is combined with an energy-based model for the approximation of functions by a deep neural network. This results in a computationally fast filter that takes observations as input and that does not require re-training when new observations are received. The method is tested on four examples, two linear in one and twenty dimensions and two nonlinear in one dimension. The method shows promising performance when benchmarked against the Kalman filter and the bootstrap particle filter.
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