Open Access
Table 2
Comparison of robustness metrics for different systems under abnormal operating conditions.
| System | Test scenario | Average vessel layover time/h | Performance degradation (relative to baseline)/h | Recovery time required/h |
|---|---|---|---|---|
| RBS | Benchmark (High Load) | 108.50 | - | - |
| Quay crane failure | 152.35 | 43.85 | >24 | |
| Operation disruption | 118.70 | 10.2 | 18.27 | |
| CNN-LSTM-ACO | Benchmark (High Load) | 92.15 | - | - |
| Quay crane failure | 112.85 | 20.70 | 12.15 | |
| Operation disruption | 104.41 | 12.26 | 8.78 | |
| LSTM-AA-GA | Benchmark (High Load) | 75.32 | - | - |
| Quay crane failure | 89.91 | 14.59 | 8.55 | |
| Operation disruption | 82.55 | 7.23 | 6.46 | |
| LSTM-AA-TS-ACO | Benchmark (High Load) | 68.95 | - | - |
| Quay crane failure | 80.12 | 11.17 | 5.35 | |
| Operation disruption | 75.88 | 6.93 | 4.12 |
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