Research Article
An Improved Nonlinear Grey Bernoulli Model Based on the Whale Optimization Algorithm and Its Application
Table 3
Simulated and predicted results by different grey models.
| Actual data | GM (1, 1) | DGM (1, 1) | NGBM (1, 1) | ONGBM (1, 1) | INGBM (1, 1) |
| 1033 | | | | | | 1105 | 997.76 | 1001.69 | 1105.03 | 1105.55 | 1105.02 | 1199 | 1176.05 | 1180.66 | 1178.47 | 1173.25 | 1158.90 | 1330 | 1386.20 | 1391.61 | 1352.46 | 1342.52 | 1330.20 | 1583 | 1633.90 | 1640.25 | 1599.05 | 1583.71 | 1581.54 | 1882 | 1925.86 | 1933.31 | 1920.67 | 1898.57 | 1914.91 | 2370 | 2269.99 | 2278.73 | 2328.86 | 2298.04 | 2343.38 | RMSE | 70.36 | 69.58 | 26.99 | 32.33 | 23.81 | MAPE | 4.27 | 4.28 | 1.37 | 1.18 | 1.05 | 3310 | 2675.62 | 2685.87 | 2849.94 | 2798.78 | 2886.89 | RMSE | 634.38 | 624.13 | 469.06 | 511.22 | 423.11 | MAPE | 19.17 | 18.86 | 14.17 | 15.44 | 12.78 |
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