Table 1 Statistical model parameter setting.

From: Air-quality prediction based on the ARIMA-CNN-LSTM combination model optimized by dung beetle optimizer

City

Beijing

Lanzhou

Jiaozuo

Guangzhou

ARIMA parameter setting

(3, 1, 1)

(2, 1, 2)

(3, 1, 1)

(2, 1, 2)

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