我国沿海商品车滚装物流发展分析

分析我国沿海商品车滚装物流发展的外部条件,对我国沿海港口商品车滚装物流量进行预测,阐述我国沿海滚装港口、航线、运力的资源条件,针对我国沿海发展商品车滚装物流存在的问题提出了建议。     

构建“三维”物流集散网络与天津港口建设

物流是国民经济的基础和动脉,构建"三维"物流集散网络是实现将天津建设成为我国北方经济中心、国际港口现代化大都市和生态城市战略目标的重要举措之一.文章在阐述"三维"物流系统的内涵及特征的基础上,分析探讨了构建"三维"物流集散网络对加快天津港口建设的影响以及实施策略.     

中韩物流业的合作框架与发展前景分析

当前,发展中韩物流业合作引起了广泛关注。阐述了中韩物流业合作交流的基础与条件,分析了中韩物流业发展的前景,详细讨论了中韩物流合作框架。最后指出,加快中韩物流合作进程,对我国融入东北亚物流圈及进入全球供应链物流圈,都有重要的战略意义。     

Global logistics city concept: a cluster-led strategy under the belt and road initiative

This paper develops a cluster-led strategic policy framework to assess the strategic positioning of key global logistics cities in Asia, most of which are affected by the ‘Belt and Road (B&R) Initiative.’ One of the key challenges that the B&R Initiative is facing is underdeveloped logistics infrastructure in Asia, not to mention road congestion, dilapidated infrastructure, incessant supply chain disruptions, and capacity constraint, which imposes significant economic costs.

Global logistics cities are evaluated on logistics infrastructure capacity and service responsiveness. This involves selecting the key global logistics cities, identifying key indicators, standardising and indexing, mapping dimensions of global logistics cities, and developing the cluster-led strategic policy framework.

The results indicate the prevalence of a multi-tier system wherein Shanghai and Hong Kong have attained the maturity of a global logistics city, whilst Manila, Jakarta, and Bangalore are making slow but steady progress in that direction. In contrast, Dhaka, Phnom Penh, and Ho Chi Minh City are showing potential but require further enhancement through significant investment in infrastructure and service delivery improvement.

The cluster-led strategic policy framework formulates actions and strategies through which emergent logistics networks can be strategically aligned and functionally integrated with B&R-oriented global trading hubs and transport corridors..     

Logistics connectivity considering import and export for Chinese inland regions in the 21st-Century Maritime Silk Road by dry ports

This investigation studies the logistics connectivity of inland Chinese provinces along the 21st-Century Maritime Silk Road (MSR) from the perspective of the oriented cooperation relationship between seaports and dry ports in inland regions. The logistics connectivity is measured based on the import and export data. First, complex network theory is used to develop a system for evaluating logistics connectivity of inland regions, involving metrics of susceptible-infected-recovered, and improved closeness centrality proposed to drawing on the characteristics of the studied network based on closeness centrality. Second, based on collected data, 136 dry ports in China and 127 seaports along the MSR have been used to construct an empirical network that covers 15 inland provinces of China. Then, the accessibility and importance of inland provinces are analyzed, and key points that serve the improvement of the logistics connectivity of inland provinces are mined and summarized. An example of an improved scheme for the connectivity of inland provinces is presented to demonstrate the application of these key points. The conclusions drawn support decision-making for local governments to improve the logistics connectivity of inland regions in the international logistics network, and then strengthen the participation of inland provinces in the MSR.     

伸缩式物流起重机的结构设计

ZHU Yongquan;LI Songling;REN Mingbo;LI Antao(Shanghai Marine Equipment Research Institute,Shanghai 200031,China)     

美国密西西比河与长江黄金水道粮食运输的对比分析

内河粮食运输存在着效率低、耗损大、品质难以保证的问题,而长江黄金水道是粮食内河运输的重要通道,因此,如何最大限度地发挥长江航道运能大、能耗小、成本低的优势就显得尤为紧迫。密西西比河是美国南北航运的大动脉,年货运量超过10亿t,美国一半左右的谷物出口要通过密西西比河运输。高效的密西西比河驳船运输方式,极大地提高了美国出口粮食在国际市场上的竞争力。从航道、运输船舶和船型技术参数这3个方面进行对比分析,以期为我国发展长江黄金水道粮食运输提供借鉴。     

农产品物流中心的经济规模优化模型

为优化农产品物流中心经营规模,分析了农产品物流中心的经营行为,将规模收益率引入物流中心经营规模优化中,建立了一种基于生产函数和规模收益率的物流中心经济规模优化模型,计算了物流中心经营规模与规模收益率的关系。以寿光市农产品物流中心为例,对优化模型进行了应用,规模收益率计算结果在模型确定的范围内,且随物流中心资本与劳动力投入的增长,物流中心规模收益率呈现先递增后递减的特征,结果表明优化模型是可行的,可以用来衡量物流中心经营规模的经济性。     

灾后道路抢修和物资配送的整合优化算法

为了在有限的时间内同时获得最佳抢修效益和物资配送方案,提高救灾工作效率,针对灾后道路抢修与救灾物资配送问题,利用时空网络流动技巧,构建了两者相应的时空网络,在考虑两者的相关性后,建立了多目标的灾后道路抢修工程与紧急物资配送混合整数多重网络规划模型,提出了分解启发式求解方法。算例计算结果表明,用CPLEX数学规划软件直接求解,在求解到106.9 h时,才可求得最优解,而分解启发式方法只需31.8 min即可求得最优解,其求解效率大幅提高,求解时间对于实际的救灾工作是可以接受的。     

再制造物流网络优化设计的扩展模型

针对再制造物流网络与传统生产分销物流网络的集成优化设计问题,综合考虑网络中正向和逆向物流的设施集成与运输整合,以及设施建设成本的规模经济效应,基于混合整数非线性规划方法,建立了一种再制造物流网络优化设计的扩展模型,用来确定网络中各种设施的数量、位置及规模,并在由此构成的各条物流路径上合理分配物流量,使运营周期内的净收益最大.最后,通过一个算例对模型进行了数值演算和验证.计算结果表明:该模型能根据物流网络的实际调查数据,得到网络的最优目标函数与决策变量值,能有效辅助再制造物流网络优化设计.