Research Article
A Hybrid Genetic Programming Method in Optimization and Forecasting: A Case Study of the Broadband Penetration in OECD Countries
Table 21
Representation of the first five produced
hGP models in fitting (OECD
overall).
| | Fitting
performance—hGP models for OECD overall
| | Model
name | Model |
| | hGP Model
1 | 0.371142995572*E(−3.18695928215*E(−0.0179031441739*t))*E(−E(−4.31337138346e+11
*E(−0.39450322724*t))*(
3.81808835539*t−0.290266301465+3.81536111536*t))
| | hGP Model
2 | 0.310471455673*E(−3.11349554655*E(−0.0204726299602*t))**E(−0.168943728131/(1+E
(−(−50.6231851732+0.733563132765*t))))
| | hGP Model
3 | 0.297974863522*E(−3.04030207778*E(−0.0232771010194*t))*E(−0.12721433893*E
(−109810.431808/(1+E(−(−40.4802143374+0.418592190558*t)))))
| | hGP Model
4 | 0.297974843236*E(−3.0403025557*E(−0.0232771051305*t))*E(−0.12721423417*E
(−70692.9894579/(1+E(−(−40.0400529746+0.418595561014*t)))))
| | hGP Model
5 | 0.297974680462*E(−1.8377143802*E(−0.0232772109071*t))*E(−1.20258571767*E
(−0.0232769748624*t))*E(−0.1272152801*E(−22946.6443056/(1+E(−(−38.9144349592
+0.418589930059*t))))) |
|
|
