[2] Y P Luo, T Chen, H Ding et al. Characteristics analysis of PM2.5 and NO2 pollution at Beijing traffic stations during the Spring Festival from 2014 to 2018. Acta Scientiarum Naturalium Universitatis Sunyatseni, 59, 50-63(2020).

[3] Y M Zhou, X Y Zhao. Correlation analysis between PM2.5 concentration and meteorological factors in Beijing area. Acta Scientiarum Naturalium Universitatis Pekinensis, 53, 111-124(2017).

[4] L K Huang, Y Y Xu, G Z Wang et al. Study on pollution characteristics and toxic effects of fine particulate matter in Harbin, China. China Environmental Science, 39, 5326-5332(2019).

[5] K K Liu, H Zhang, G J Liu. Elemental composition characteristics of PM2.5 and PM10, and heavy pollution analysis in Hefei. Environmental Science, 40, 3415-3420(2019).

[6] J Y Zhang, L Tian, S M Li et al. Relationship between ambient PM2.5 exposure and outpatient number for respiratory diseases in Chaoyang District, Beijing, China: A time series analysis. Journal of Environmental Hygiene, 10, 367-371(2020).

[7] W Li, H Hu, F C Xu et al. Studies on big data analysis technology used in environmental sciences. Environmental Monitoring in China, 31, 118-122(2015).

[8] J X Zhu, X D Chen, B L Lü et al. Smart failure/fault diagnosis and influence analysis for mechanical equipment with multivariate Gaussian Bayesian method. Journal of Mechanical Engineering, 56, 35-41(2020).

[10] W McKinney. Python for Data Analysis(2012).

[11] J Zhang, M Yuan, Y Y Liu. The Bayes classifier based on the normal mixture model and its application. Acta Mathematicae Applicatae Sinica, 43, 742-755(2020).

[13] F R Han, X Lu, T Y Wu et al. Characteristics of air pollution in Jinhua City and its relationship with meteorological conditions. Journal of Zhejiang Meteorology, 42, 13-18(2021).

[14] X H Liu. High-Dimensional Data Analysis Based on Scatter Plot Classification(2019).

[15] X R Chen. Research on characteristics of air pollutant emission changes in eco-city based on big data analysis. Environmental Science and Management, 47, 60-63(2022).

[16] D Xu, Q Zhang, G Q Fan et al. Characteristics of particles pollution based on lidar network in Hangzhou and surrounding areas. Journal of Atmospheric and Environmental Optics, 14, 171-178(2019).