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Optimal emergency plan under different cost preference degrees.
| α | Participating service points | The most used service point | Multi-objective result |
|---|---|---|---|
| 0 | 3,6 | 3 | 1 |
| 0.1 | 3,6 | 3 | 1.003426 |
| 0.2 | 3,6 | 3 | 1.006831 |
| 0.3 | 3,6 | 3 | 1.010278 |
| 0. | 3,6 | 3 | 1.013705 |
| 0.5 | 3,6 | 3 | 1.017131 |
| 0.6 | 3,6 | 3 | 1.020194 |
| 0.7 | 3,6 | 3 | 1.019258 |
| 0.8 | 3,6 | 3 | 1.018242 |
| 0.9 | 3,5,6 | 3 | 1.015524 |
| 1 | 3,4,5 | 3 | 1 |
