Table 5.
Parameters of the different distributions based on the different optimized algorithm. In Table 5, a and b represent scale and shape parameters of distribution functions, respectively.
| Indexes | Optimized Algorithm | Parameters | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Weibull | Gamma | Lognormal | Log-Logistic | Inverse Gaussian | |||||||
| a | b | a | b | a | b | a | b | a | b | ||
| PM2.5 | BBO | 45.6353 | 1.1494 | 1.1219 | 39.3960 | 0.9590 | 3.3423 | 1.9971 | 31.9631 | 46.2247 | 47.6059 |
| BBODE | 45.7883 | 1.1754 | 1.3769 | 31.5937 | 0.8675 | 3.4642 | 1.9865 | 32.0344 | 46.1661 | 47.6248 | |
| PM10 | BBO | 82.0580 | 1.3799 | 4.5728 | 15.1932 | 0.7351 | 3.9522 | 2.6477 | 62.4040 | 77.6225 | 137.8372 |
| BBODE | 82.1414 | 1.5152 | 2.2187 | 33.7894 | 0.6939 | 4.1205 | 2.4676 | 61.5932 | 78.0797 | 137.2609 | |
| O3 | BBO | 81.9614 | 1.8979 | 3.7011 | 19.7425 | 0.6156 | 4.0754 | 3.0971 | 65.1357 | 76.2749 | 199.8628 |
| BBODE | 82.0189 | 1.8920 | 3.0735 | 24.0945 | 0.5648 | 4.1715 | 3.0136 | 64.9673 | 75.8027 | 213.8432 | |
| SO2 | BBO | 27.1355 | 1.1097 | 0.9696 | 28.5482 | 2.8314 | 1.0833 | 1.6724 | 17.3678 | 27.1713 | 19.4500 |
| BBODE | 26.4620 | 0.9312 | 0.9194 | 29.4822 | 2.8378 | 1.0554 | 1.6357 | 17.1035 | 29.3444 | 18.3036 | |
| NO2 | BBO | 35.1287 | 2.1449 | 3.8436 | 8.2904 | 0.5596 | 3.2623 | 3.2489 | 28.1741 | 32.5209 | 112.2516 |
| BBODE | 35.2476 | 2.1360 | 3.8948 | 8.1566 | 0.5075 | 3.3501 | 3.3673 | 28.5397 | 32.3743 | 114.6579 | |
| CO | BBO | 0.8547 | 2.2424 | 1.1233 | 0.7854 | 0.4562 | −0.3797 | 3.8337 | 0.7208 | 1.0952 | 1.0957 |
| BBODE | 0.8229 | 2.3983 | 4.4389 | 0.1689 | 0.4558 | −0.3789 | 3.7101 | 0.6832 | 0.7589 | 3.3818 | |