Research Article
Assessing Spatiotemporal Characteristics of Urban PM2.5 Using Fractal Dimensions and Wavelet Analysis
Table 3
Radius dimensions of PM2.5 concentration from 2014 to 2017 in Beijing.
| | Year | Regression equation | Radius dimension | Coefficient of determination |
| | 2014 | lnS(r) = 1.7608lnr + 1.4643 | 1.7608 | 0.9979 | | 2015 | lnS(r) = 1.8234lnr + 1.3892 | 1.8234 | 0.9986 | | 2016 | lnS(r) = 1.8548lnr + 1.359 | 1.8548 | 0.9987 | | 2017 | lnS(r) = 1.8522lnr + 1.3739 | 1.8522 | 0.9979 |
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