Research Article
Forecasting of Wastewater Discharge and the Energy Consumption in China Based on Grey Model
Table 4
Forecasting values by GM(0,2) and IGM(0,2).
| Sequence number | Actual value | GM(0,2) model | IGM(0, 2) model | Model value | Relative error (%) | Model value | Relative error (%) |
| 2 | 3.278 | 3.153 | 3.8 | 3.293 | 0.4 | 3 | 3.307 | 3.331 | 0.7 | 3.248 | 1.7 | 4 | 3.390 | 3.518 | 3.8 | 3.476 | 2.5 | 5 | 3.679 | 3.619 | 1.6 | 3.623 | 1.5 |
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