Table 2: Error functions used to discriminate between models.

Error functionDefinitionReferences

Coefficient of determination ( )(10) [24, 25, 41]
Sum of the squares of errors (ERRSQ) (11) [34]
Hybrid fractional error function (HYBRID) (12) [42]
Marquardt’s percent standard deviation (MPSD) (13) [43, 44]
Average relative error (ARE) (14) [24, 45]
Sum of the absolute errors (EABS) (15) [46]
Corrected Akaike information criterion (AICC)(16) , [4648]
(17) where
Akaike weight for the ith model ( )(18) ,
(19) where