From: Global solar radiation estimation from commonly available meteorological data for Bangladesh
Model no. | Model type | Equations | \(R^2\) | MBE | MPE | MARE | RMSE | t stat |
---|---|---|---|---|---|---|---|---|
22 | Linear | \(H/H_0 = -0.2302C + 0.5713\) | 0.993695408 | 0.021340195 | 0.656623 | 0.071691 | 0.33156 | 0.213912 |
23 | Quadratic | \(H/H_0 = -0.4585C^2 + 0.2087C + 0.4942\) | 0.995392681 | 0.015789962 | 0.490597 | 0.058503 | 0.283438 | 0.185052 |
24 | Third degree | \(H/H_0 = 1.9104C^3 - 3.1785C^2 + 1.3352C + 0.3669\) | 0.99540268 | 0.01358356 | 0.448265 | 0.048137 | 0.28313 | 0.159303 |
25 | Fourth degree | \(H/H_0 = -11.449C^4 + 23.22C^3 - 16.729C^2 + 4.7227C + 0.0963\) | 0.995752521 | 0.000808352 | 0.800828 | 0.054337 | 0.272144 | 0.009851 |
26 | Fifth degree | \(H/H_0 = 120.19C^5 - 299.15C^4 + 281.59C^3 - 124.07C^2 + 25.073C - 1.3032\) | 0.997452146 | 0.015181073 | 0.113112 | 0.034455 | 0.210776 | 0.239501 |
27 | Logarithmic | \(H/H_0 = -0.083\hbox {ln}(C) + 0.386\) | 0.990582324 | 0.016444457 | 0.887773 | 0.090946 | 0.405233 | 0.1347 |
28 | Exponential | \(H/H_0 = 0.5819\hbox {exp}(-0.509C)\) | 0.993189811 | 0.036221558 | 0.347545 | 0.072874 | 0.344598 | 0.350561 |
29 | Power | \(H/H_0 = 0.3862C^{-0.184}\) | 0.989958374 | 0.037624897 | 0.44366 | 0.091626 | 0.418442 | 0.299433 |