1. A Multi-Scale Method for PM2.5 Forecasting with Multi-Source Big Data.
- Author
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Yuan, Wenyan, Du, Hongchuan, Li, Jieyi, and Li, Ling
- Abstract
In the age of big data, the Internet big data can finely reflect public attention to air pollution, which greatly impact ambient PM
2.5 concentrations; however, it has not been applied to PM2.5 prediction yet. Therefore, this study introduces such informative Internet big data as an effective predictor for PM2.5 , in addition to other big data. To capture the multi-scale relationship between PM2.5 concentrations and multi-source big data, a novel multi-source big data and multi-scale forecasting methodology is proposed for PM2.5 . Three major steps are taken: 1) Multi-source big data process, to collect big data from different sources (e.g., devices and Internet) and extract the hidden predictive features; 2) Multi-scale analysis, to address the non-uniformity and nonalignment of timescales by withdrawing the scale-aligned modes hidden in multi-source data; 3) PM2.5 prediction, entailing individual prediction at each timescale and ensemble prediction for the final results. The empirical study focuses on the top highly-polluted cities and shows that the proposed multi-source big data and multi-scale forecasting method outperforms its original forms (with neither big data nor multi-scale analysis), semi-extended variants (with big data and without multi-scale analysis) and similar counterparts (with big data but from a single source and multi-scale analysis) in accuracy. [ABSTRACT FROM AUTHOR]- Published
- 2023
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