Optimizing Container Loading and Unloading through Dual-Cycling and Dockyard Rehandle Reduction Using a Hybrid Genetic Algorithm

The paper proposes the Quay Crane Dual Cycle - Dockyard Rehandle Genetic Algorithm (QCDC-DR-GA), a hybrid GA that jointly optimizes the unloading sequence of Quay Crane Dual-Cycling and dockyard rehandle minimization. By employing specialized crossover and mutation strategies, the algorithm maximizes the number of Dual Cycles while reducing dockyard rehandles. Experiments on various ship sizes show a 15‑20% reduction in total operation time for large ships compared to existing methods, with statistical significance confirmed at the 5% level.

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