Online evolutionary neural architecture search for multivariate non-stationary time series forecasting
Journal Article
·
· Applied Soft Computing
- Rochester Inst. of Technology, Rochester, NY (United States); OSTI
- Rochester Inst. of Technology, Rochester, NY (United States)
Time series forecasting (TSF) is one of the most important tasks in data science. TSF models are usually pre-trained with historical data and then applied on future unseen datapoints. However, real-world time series data is usually non-stationary and models trained offline usually face problems from data drift. Models trained and designed in an offline fashion can not quickly adapt to changes quickly or be deployed in real-time. To address these issues, this work presents the Online NeuroEvolution-based Neural Architecture Search (ONE-NAS) algorithm, which is a novel neural architecture search method capable of automatically designing and dynamically training recurrent neural networks (RNNs) for online forecasting tasks. Without any pre-training, ONE-NAS utilizes populations of RNNs that are continuously updated with new network structures and weights in response to new multivariate input data. ONE-NAS is tested on real-world, large-scale multivariate wind turbine data as well as the univariate Dow Jones Industrial Average (DJIA) dataset. These results demonstrate that ONE-NAS outperforms traditional statistical time series forecasting methods, including online linear regression, fixed long short-term memory (LSTM) and gated recurrent unit (GRU) models trained online, as well as state-of-the-art, online ARIMA strategies. Additionally, results show that utilizing multiple populations of RNNs which are periodically repopulated provide significant performance improvements, allowing this online neural network architecture design and training to be successful.
- Research Organization:
- Microbeam Technologies, Inc., Grand Forks, ND (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Fossil Energy (FE)
- Grant/Contract Number:
- FE0031547
- OSTI ID:
- 2422444
- Journal Information:
- Applied Soft Computing, Journal Name: Applied Soft Computing Journal Issue: C Vol. 145; ISSN 1568-4946
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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