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DESA: a novel hybrid decomposing-ensemble and spatiotemporal attention model for PM2.5 forecasting

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Abstract

Exposure to fine particulate matter can easily lead to health issues. PM2.5 concentrations are associated with various spatiotemporal factors, which makes the prediction of PM2.5 concentrations still a challenging task. One of the reasons that makes the accurate prediction by statistical learning method difficult is severe fluctuations in input data. In addition, the abstraction method of space will also affect the prediction results. To address these important issues, a novel hybrid decomposing-ensemble and spatiotemporal attention (DESA) model is proposed to improve the prediction accuracy by decomposing the mode-mixed time series into single-mode series and automatically assign weights to the spatiotemporal factors. In our proposed framework, raw PM2.5 series are firstly decomposed into simple sub-series via the complete ensemble empirical mode decomposition (CEEMD) method. Then, to keep the results independent of the spatial abstraction method, a data-driven approach called multiscale spatiotemporal attention network is employed to extract spatiotemporal features from the sub-series. Finally, the predictions of each sub-series are processed separately and combined to obtain the final prediction results. The experimental results indicate that the proposed model achieved the better performance with RMSE of 11.15, 17.49, 24.84, and 26.93 for 6-, 12-, 24-, and 36-h forecasting, respectively. The proposed method is expected to be applied in fine prediction of air pollution and controlling programs and therefore provide decision support or useful guidance.

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Data availability

The datasets analyzed during the current study are available in the website of the Environmental Protection Administration (EPA) of China repository, http://www.bjepb.gov.cn/, and the website of the China Meteorological Administration (CMA), http://www.cma.gov.cn/en2014/.

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Funding

This work is financially supported by the China Postdoctoral Science Foundation [Grant Number 2021M690201] and Jiangxi University of Science and Technology [Grant Number 205200100418]. The fund provides software and hardware funding for research.

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Contributions

SF analyzed the data and came up with the original model and was a major contributor in writing the manuscript. QL and HK supervised the whole experiment process and proposed modification suggestions. HK and HL put forward a lot of valuable suggestions and gave guidance on the writing of the manuscript. YM gave suggestions on data processing. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Shuwei Fang.

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The authors declare no competing interests.

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Responsible Editor: Marcus Schulz

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Fang, S., Li, Q., Karimian, H. et al. DESA: a novel hybrid decomposing-ensemble and spatiotemporal attention model for PM2.5 forecasting. Environ Sci Pollut Res 29, 54150–54166 (2022). https://doi.org/10.1007/s11356-022-19574-4

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  • DOI: https://doi.org/10.1007/s11356-022-19574-4

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