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Title: Self-consistent learning of neural dynamical systems from noisy time series
Authors: Wang, Zhe
Guet, Claude
Keywords: Engineering::Computer science and engineering
Issue Date: 2022
Source: Wang, Z. & Guet, C. (2022). Self-consistent learning of neural dynamical systems from noisy time series. IEEE Transactions On Emerging Topics in Computational Intelligence, 6(5), 1103-1112.
Journal: IEEE Transactions on Emerging Topics in Computational Intelligence
Abstract: We introduce a new method which, for a single noisy time series, provides unsupervised filtering, state space reconstruction, efficient learning of the unknown governing multivariate dynamical system, and deterministic forecasting. We construct both the underlying trajectories and a latent dynamical system using deep neural networks. Under the assumption that the trajectories follow the latent dynamical system, we determine the unknowns of the dynamical system, and filter out stochastic outliers in the measurements. In this sense the method is self-consistent. The embedding dimension is determined iteratively during the training by using the false-nearest-neighbors Algorithm and it is implemented as an attention map to the state vector. This allows for a state space reconstruction without a priori information on the signal. By exploiting the differentiability of the neural solution trajectory, we can define the neural dynamical system locally at each time, mitigating the need for forward and backwards passing through numerical solvers of the canonical adjoint method. On a chaotic time series masked by additive Gaussian noise, we demonstrate that the denoising ability and the predictive power of the proposed method are mainly due to the self-consistency, insensitive to methods used for the state space reconstruction.
ISSN: 2471-285X
DOI: 10.1109/TETCI.2022.3146332
Rights: © 2022 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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