Table 6 Comparison of errors of various algorithm and transfer function for estimation of Rf.
Algorithm | Transfer function | MSE training | MSE validation | MSE test | r2 training | r2 validation | r2 test |
|---|---|---|---|---|---|---|---|
BFGS | Hyperbolic tangent sigmoid | 1.668 × 10−11 | 2.585 × 10−11 | 1.707 × 10−11 | 0.995 | 0.993 | 0.995 |
Linear | 4.221 × 10−10 | 3.374 × 10−10 | 4.595 × 10−10 | 0.864 | 0.911 | 0.865 | |
Sigmoid | 4.246 × 10−10 | 4.646 × 10−10 | 4.513 × 10−10 | 0.866 | 0.874 | 0.866 | |
Gradient descent | Hyperbolic tangent sigmoid | 6.833 × 10−11 | 5.966 × 10−11 | 5.209 × 10−11 | 0.982 | 0.986 | 0.986 |
Linear | 1.036 × 10−09 | 7.187 × 10−10 | 1.186 × 10−09 | 0.786 | 0.911 | 0.735 | |
Sigmoid | 4.400 × 10−10 | 4.563 × 10−10 | 4.798 × 10−10 | 0.863 | 0.879 | 0.862 | |
Conjugate gradient | Hyperbolic tangent sigmoid | 4.052 × 10−11 | 5.628 × 10−11 | 4.422 × 10−11 | 0.988 | 0.986 | 0.990 |
Linear | 4.478 × 10−10 | 3.271 × 10−10 | 4.681 × 10−10 | 0.859 | 0.914 | 0.862 | |
Sigmoid | 4.349 × 10−10 | 4.625 × 10−10 | 4.545 × 10−10 | 0.864 | 0.876 | 0.865 |
