The identification of the best values to be assigned to the model
parameters was carried out by the specific statistical program me
BURENL [9] able to identify in a space of j-dimensions (where j is
equal to the number of model parameters) the minimum value of the F
function, which is given by the sum of squares of differences occurring
among experimental (Yi, exper.) and calculated (Yi,calc.) data:
( )2
,calc. ,exper.
1
N
i i
i
F Y Y
=
=Σ −
Where N represents the total number of experimental
determinations. The values assumed by the model parameters at the
minimum of the F function represent the best values