| Abbreviation | Full Name |
| PCA | Principal component analysis |
| ANOVA | Analysis of variance |
| XUAR | Xinjiang Uygur Autonomous Region |
| AQSIQ | Administration of Quality Supervision, Inspection and Quarantine |
| NSC | National Standards Committee |
| API | Air pollution indexes |
| SPSS | Statistical Package of Social Science |
| GAM | Generalized additive model |
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