为在保证货主满意度的同时尽可能地控制航运成本,在考虑北极东北航线气象条件和自愿速度损失的基础上,建立北极东北航线航速优化模型,通过带精英策略的非支配排序遗传算法(elitist non-dominated sorting genetic algorithm,NSGA-Ⅱ)和...为在保证货主满意度的同时尽可能地控制航运成本,在考虑北极东北航线气象条件和自愿速度损失的基础上,建立北极东北航线航速优化模型,通过带精英策略的非支配排序遗传算法(elitist non-dominated sorting genetic algorithm,NSGA-Ⅱ)和逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)筛选出最佳折中解。选取北极东北航线沿线重要港口进行案例分析,结果表明:当航运成本降低时,货主总体满意度会下降,船公司可以根据各货主的重要性调整航速,以平衡航运成本和货主满意度;对比考虑自愿速度损失与无自愿速度损失的北极东北航线航速优化模型发现,两者的优化结果存在显著差异,自愿速度损失直接影响航速优化模型的准确性;航速优化对时间窗较为敏感,较大的时间窗可以为减速和提高船舶能效提供更大的机会空间。展开更多
Emerging as a dynamic economy in the South East Asia, Vietnam, the 151 st WTO member has to improve export goods value chain to create sustainable competitive advantage. Nowadays, Vietnam port-logistics sector has bee...Emerging as a dynamic economy in the South East Asia, Vietnam, the 151 st WTO member has to improve export goods value chain to create sustainable competitive advantage. Nowadays, Vietnam port-logistics sector has been becoming one of the most important service industries that contribute intensively to create value for Vietnam export goods in global market. This paper discusses one of the contemporary challenging issues for Vietnam--how to improve value chain through efficient port logistics. The objective of this research is to review literature issue of value chain, analyse the situation of Vietnam logistics sector, especially in port logistics and provide some recommendations to improve value chain of Vietnam export goods. The surveyed issues of both sides of logistics service providers （LSPs） and beneficial cargo owners （BCOs） will be taken into consideration. Based on the findings result, some actions are suggested to the government and local logistics service providers to make necessary decisions and solutions to improve value chain of Vietnam export goods through efficient port logistics.展开更多
文摘为在保证货主满意度的同时尽可能地控制航运成本,在考虑北极东北航线气象条件和自愿速度损失的基础上,建立北极东北航线航速优化模型,通过带精英策略的非支配排序遗传算法(elitist non-dominated sorting genetic algorithm,NSGA-Ⅱ)和逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)筛选出最佳折中解。选取北极东北航线沿线重要港口进行案例分析,结果表明:当航运成本降低时,货主总体满意度会下降,船公司可以根据各货主的重要性调整航速,以平衡航运成本和货主满意度;对比考虑自愿速度损失与无自愿速度损失的北极东北航线航速优化模型发现,两者的优化结果存在显著差异,自愿速度损失直接影响航速优化模型的准确性;航速优化对时间窗较为敏感,较大的时间窗可以为减速和提高船舶能效提供更大的机会空间。
文摘Emerging as a dynamic economy in the South East Asia, Vietnam, the 151 st WTO member has to improve export goods value chain to create sustainable competitive advantage. Nowadays, Vietnam port-logistics sector has been becoming one of the most important service industries that contribute intensively to create value for Vietnam export goods in global market. This paper discusses one of the contemporary challenging issues for Vietnam--how to improve value chain through efficient port logistics. The objective of this research is to review literature issue of value chain, analyse the situation of Vietnam logistics sector, especially in port logistics and provide some recommendations to improve value chain of Vietnam export goods. The surveyed issues of both sides of logistics service providers （LSPs） and beneficial cargo owners （BCOs） will be taken into consideration. Based on the findings result, some actions are suggested to the government and local logistics service providers to make necessary decisions and solutions to improve value chain of Vietnam export goods through efficient port logistics.
