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Long-range forecasting in feature-evolving data streams
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DOI：10.1016/j.knosys.2020.106405.png)
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Accurate long-range forecasting in high-dimensional feature-evolving time series is a pressing issue with multiple applications in optimal resource allocation, monitoring and budget planning. Stochastic nature of feature-evolving time series coupled with their temporal dependency pose a great challenge in their forecasting. This is because the length of input sequence (rows) may vary as data points evolve with their feature values (columns) changing. In high-dimensional feature-evolving heterogeneous time series, it is impractical to train a forecasting model per single time series across millions of metrics, leave alone space required to maintain the forecasting model and evolving time series in memory for timely streaming processing. Thus this paper proposes One sketch Fits All Time series algorithm, which is a stochastic deep neural network framework to address stated problems collectively. Extensive experiments on real-life datasets and rigorous evaluation showcases that OFAT is fast, robust, accurate and superior to the state-of-the-art methods. (C) 2020 Elsevier B.V. All rights reserved.
Keyword:
Feature-evolving streams
Time series
Deep neural networks
Forecasting
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