Sample serial number | Neural network forecast results (mg/L) | Neural network prediction error % | WLS-SVM forecast results (mg/L) | WLS-SVM prediction error% | Standard content (mg/L) |
21 | 5.37 | 2.33 | 5.20 | −0.97 | 5.25 |
22 | 5.94 | 7.93 | 5.55 | 0.83 | 5.50 |
23 | 5.35 | −6.98 | 5.73 | −0.29 | 5.75 |
24 | 5.93 | −1.23 | 6.16 | 2.59 | 6.00 |
25 | 5.46 | −12.66 | 6.25 | −0.06 | 6.25 |
26 | 5.73 | −11.81 | 6.56 | 1.00 | 6.50 |
27 | 6.74 | −0.10 | 6.61 | −2.09 | 6.75 |
28 | 6.49 | −7.28 | 7.06 | 0.83 | 7.00 |
29 | 6.70 | −7.62 | 7.31 | 0.78 | 7.25 |
30 | 7.22 | −3.75 | 7.68 | 2.34 | 7.50 |
31 | 7.70 | −0.60 | 7.82 | 0.90 | 7.75 |
32 | 7.19 | −10.17 | 7.90 | −1.24 | 8.00 |
33 | 8.35 | 1.19 | 8.30 | 0.58 | 8.25 |
34 | 8.61 | 1.34 | 8.38 | −1.47 | 8.50 |
35 | 8.94 | 2.18 | 8.90 | 1.77 | 8.75 |
36 | 9.63 | 6.95 | 9.03 | 0.33 | 9.00 |
37 | 8.46 | −8.55 | 9.47 | 2.40 | 9.25 |
38 | 8.98 | −5.48 | 9.38 | −1.24 | 9.50 |
39 | 9.85 | 1.04 | 9.70 | −0.50 | 9.75 |
40 | 8.99 | −10.12 | 10.29 | 2.87 | 10.00 |