Research Article
A Hybrid Genetic Programming Method in Optimization and Forecasting: A Case Study of the Broadband Penetration in OECD Countries
Table 35
Representation of the first five produced hGP models in forecasting (Denmark).
| Forecasting performance—hGP models for Denmark | Model name | Model |
| hGP Model 1 | 0.370274249473/(1+E(−(−1.4932887728−1.6616878321−(0.0657816856919 −0.0657829197159)*(t*(t−(−54744.3143422)−(+26.3542094658)*(t−46.1208987279)* (t+25.8109328343−(+47.3153899385−46.1208987279)*(t/(1+(−2.94897421702/ +14.4559028944)*E(−(E(−(E(−(E(−(−69.3535656648+1.1508868672*t)))))))))))))))) | hGP Model 2 | 0.367675661705/(1+E(−(−1.54302066592−1.68154541948−(0.0657658786124 −0.0657664779573)*(t*(t−(−56772.6811399)−(−57863.1392956−57863.1735902 −(2053.24155389*(t++9.11367676744−(0.0657743518948−0.06575839253)*(t*(t− (−95622.1907084)−(+3.71296243976)*(t++153.381465941)*(t−69.4331806343))))))))))) | hGP Model 3 | 0.368792284508/(1+E(−(−1.59162101334−1.73786706106−(0.0657680461973 −0.0657550491287)*(t*(t−9961.43677147−(0.0655352138407−0.0654902811262)*(t*(t− (−(−(−0.417805111612)*(t−87094.1655681+161159.989637)*(t−115.359792771)))))))))) | hGP Model 4 | 0.368796568856/(1+E(−(−1.55630251856−1.77353320735−(0.0654733227916 −0.0655131749375)*(t*(t−(−(−(−0.0997652183839)*(t+10381.0881184+11105.3767878+ +11089.8380866−(0.0661623277964−0.0667280200974)*(t*(t−(−(+4067.51578195+ +3972.08191893)*(t−118.562082811)))))))))))) | hGP Model 5 | 0.368796569031/(1+E(−(−1.59261997915−1.73721570272−(0.0654378132468 −0.0655261015789)*(t*(t−(−(−(−726.874412652)+740.122972564−(0.0656174439567 −0.0654501910722)*(t*(t−(−(148193.4147−(+601.176257868++624.503460915)*(t/(1+ (−4.14155341813/5.62371847802)*E(−(E(−(−26.4655872285 +0.152122244894*t))))))))))))))))) |
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