Table 6 Correlation with the first-level air standard.
Correlation coefficient and correlation degree | ζ1 | ζ2 | ζ3 | ζ4 | ζ5 | R1 |
|---|---|---|---|---|---|---|
\(S_{1}^{\prime }\) | 1.000 | 0.807 | 0.333 | 0.637 | 0.591 | 0.674 |
\(S_{2}^{\prime }\) | 1.000 | 0.638 | 0.333 | 0.558 | 0.955 | 0.697 |
\(S_{3}^{\prime }\) | 1.000 | 0.988 | 0.522 | 0.708 | 0.333 | 0.710 |
