Research Article
An Improved Generalized-Trend-Diffusion-Based Data Imputation for Steel Industry
Table 3
Imputation accuracies with different methods (coke oven’s BFG consumption).
| Missing number | Methods | Group 1 | Group 2 | Group 3 | RMSE | NRMSE | MAPE | RMSE | NRMSE | MAPE | RMSE | NRMSE | MAPE |
| | Regression | 16.73 | 0.0300 | 7.90 | 10.33 | 0.0185 | 3.56 | 9.37 | 0.0167 | 3.24 | | EM | 9.95 | 0.0178 | 5.43 | 7.25 | 0.0130 | 4.05 | 3.72 | 0.0066 | 2.40 | 3 points | SPLINE | 18.77 | 0.0336 | 7.73 | 16.81 | 0.0301 | 7.79 | 22.64 | 0.0402 | 9.49 | | GTD | 15.83 | 0.0283 | 8.30 | 15.82 | 0.0283 | 7.47 | 15.67 | 0.0278 | 7.49 | | iGTD | 13.94 | 0.0250 | 6.76 | 13.76 | 0.0246 | 6.55 | 13.74 | 0.0244 | 7.30 |
| | Regression | 16.66 | 0.0260 | 7.81 | 11.10 | 0.0171 | 4.18 | 10.82 | 0.0168 | 4.49 | | EM | 10.32 | 0.0161 | 5.47 | 6.72 | 0.0104 | 3.80 | 6.71 | 0.0104 | 3.16 | 4 points | SPLINE | 15.77 | 0.0246 | 6.50 | 38.26 | 0.0591 | 9.33 | 14.97 | 0.0231 | 6.37 | | GTD | 15.93 | 0.0249 | 7.44 | 19.75 | 0.0305 | 10.55 | 29.51 | 0.0459 | 13.58 | | iGTD | 13.81 | 0.0216 | 6.07 | 19.36 | 0.0299 | 9.39 | 13.02 | 0.0203 | 6.51 |
| | Regression | 13.24 | 0.0186 | 5.73 | 13.24 | 0.0184 | 5.55 | 15.98 | 0.0227 | 7.78 | | EM | 10.34 | 0.0145 | 5.31 | 7.52 | 0.0104 | 4.20 | 10.78 | 0.0153 | 5.27 | 5 points | SPLINE | 16.90 | 0.0237 | 9.06 | 21.57 | 0.0300 | 8.51 | 13.85 | 0.0196 | 6.20 | | GTD | 15.49 | 0.0217 | 8.33 | 22.83 | 0.0317 | 11.00 | 20.23 | 0.0287 | 11.48 | | iGTD | 11.81 | 0.0166 | 5.45 | 19.84 | 0.0276 | 9.02 | 19.27 | 0.0273 | 9.45 |
|
|