PIETS: Parallelised Irregularity Encoders for Forecasting with Heterogeneous Time-Series

Publication Year: 2021 Publication Type : JournalArticle


Heterogeneity and irregularity of multi-source data sets present a significant challenge to time-series analysis. In the literature, the fusion of multi-source time-series has been achieved either by using ensemble learning models which ignore temporal patterns and correlation within features or by defining a fixed-size window to select specific parts of the data sets. On the other hand, many studies have shown major improvement to handle the irregularity of time-series, yet none of these studies has been applied to multi-source data. In this work, we design a novel architecture, PIETS, to model heterogeneous time-series. PIETS has the following characteristics: (1) irregularity encoders for multi-source samples that can leverage all available information and accelerate the convergence of the model; (2) parallelised neural networks to enable flexibility and avoid information overwhelming; and (3) attention mechanism that highlights different information and gives high importance to the most related data. Through extensive experiments on real-world data sets related to COVID-19, we show that the proposed architecture is able to effectively model heterogeneous temporal data and outperforms other state-of-the-art approaches in the prediction task.


@article{abushaqra2021piets, title={PIETS: Parallelised Irregularity Encoders for Forecasting with Heterogeneous Time-Series},
    author={Abushaqra, Futoon M and Xue, Hao and Ren, Yongli and Salim, Flora D},
    journal={arXiv preprint arXiv:2110.00071},


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© 2021 Flora Salim - CRUISE Research Group.