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Hub-and-Spoke Transportation Network Optimization of Regional Port Cluster
with Consideration of Carbon Emission
Yang Bin, Ming Hui, Xu Bowei, Zhu Xiaolin
2015, 34(6):
144-149.
DOI: 10.3969/j.issn.1674-0696.2015.06.27
With the concept of green logistics and the consideration of the factors influencing the network costs and carbon emissions, a minimum logistics cost model, including transportation cost and time penalty cost, was established, and a minimum carbon dioxide emission model was also established, on the base of hub-and-spoke regional port transportation system and collecting and distributing system from ports to the hinterland. By rational allocation of traffic volume and transport capacity, the regional port cluster transportation system can be optimized. And then fuzzy mathematic programming method was applied to transform the dual objective problem into a single objective planning. CPLEX was used to solve the model and the efficiency of model was demonstrated by experiments when the confidence level was 0.1, 0.3, 0.5, 0.7, and 0.9 respectively. Finally, with green preference, the influence of 15 kinds of velocity combination with different types of ships and vehicles on the results was analyzed. The results show that considering transportation costs, time penalty costs and carbon emissions, the amount of direct transportation is more than the medium transport capacity under different membership degrees and the type of low fuel consumption ships and vehicles will be selected. With more attention on green factor, the ships and vehicles tend to work at low speed. The best combination of speed for boats and vehicles under different membership degrees will be calculated from the model.
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