回转起重机防摇试验台设计研究

针对回转起重机摆动抑制问题,提出一种吊盘式机械防摇系统,其基本思想为：在吊物上方装一个吊盘,通过吊盘阻碍吊物的单摆运动,减小摆动幅度。针对提出的吊盘式机械防摇系统,进行了回转起重机防摇试验台设计研究。首先进行了试验台的三维结构设计、电气系统设计,然后进行了试验台的加工、组装和调试,最后进行了试验台控制程序的开发,完成试验台的搭建工作。     

上机高压电缆外皮起皱扭曲情况分析和解决办法

分析集装箱起重机上机电缆出现外皮起皱、扭曲现象的原因,针对性地在设计、安装、调试、检验过程中采取预防和改进的措施,可避免这些损坏电缆的情况发生.     

京杭运河集装箱船队构想

该文根据对京杭运河适箱货物运输量的预测,考虑到京杭运河吃水浅,航道复杂,沿岸头装卸设备不配套的情况,提出了自带装卸设备的集装箱运输船队的构想。     

美国西海岸港口作业集装箱分析

分析美国西海岸集装箱港口作业集装箱的情况.这些港口承担大部分我国与美国贸易货物的集装箱运输,对我国外贸和集装箱运输发展有很大的影响.     

混合对转推进系统设计与实船应用研究

为全面深入了解混合对转推进系统实船安装对船舶性能影响,为数值仿真和性能预报提供实船参考数据,以集装箱运输船为应用对象,提出了一种把吊舱推进器集成在挂舵臂上的混合对转推进系统(CRP-POD),详细阐述了CRP-POD的系统构成、工作模式和电气控制系统实船设计方案。通过实船试验和运行数据分析,安装混合对转推进系统的船舶与同系列安装常规推进系统的船舶相比,特定航行工况下航速有2~3%的提升、回转能力有所降低、航向稳定性上优于常规船。     

An operational activity-based method to estimate CO2 emissions from container shipping considering empty container repositioning

This paper develops an operational activity-based method to estimate CO₂ emissions from container shipping in contrasts to the traditional aggregated activity-based method. Two case studies investigate the impacts of empty container repositioning policies and port handling capacity on CO₂ emission index. The results show that the aggregated method could well overestimate CO₂ emissions and the operational activity-based method is more appropriate. The paper also demonstrates that high port-handling capacity and efficient empty container repositioning could reduce CO₂ emissions in seaborne container transportation.     

Sustainability and interactivity between cities and ports: a two-stage data envelopment analysis (DEA) approach

Ports and cities are intrinsically linked. Port city, which serves as a link between the local and global economy, is an integration of both urban and port systems. Constrained by different regional structures, port cities have developed various formulations over time. Using a two-stage data envelopment analysis (DEA) approach, this paper proposes a new method for measuring the sustainable development of different port city systems. While the previous empirical studies often separate the port system and the urban system, this paper assesses the two systems in an integrated way. Moreover, this paper develops a systematic methodology for measurement of sustainability. Twenty world-leading container port cities are selected for this study using contemporary data. The DEA results display their relative differences in levels of sustainable development, which reveal the effectiveness of the prevailing policies in them. Eventually, recommendations are drawn for other port cities by referring to the best practices.     

How do economies of density in container handling operations affect ships’ time and emissions in port? Evidence from Norwegian container terminals

Efficient port services are prerequisites for competitive and sustainable maritime transports. This paper makes advances in studying the determinants of the time that ships spend in port and the associated emissions to air. We estimate a production model for cargo handling based on a unique dataset containing each port of call at the largest container terminals in Norway in 2014. In turn, we use auxiliary engine emission factors to estimate particulate matter and nitrogen oxide emissions from ships at berth, to determine how the corresponding damage costs of air pollution vary with container throughput, location, and terminal investments. We find that Norwegian container terminals operate under increasing returns to density. Small ships that unload few containers are far from reaping economies of density, leading to high marginal time requirements for container handling and consequently high marginal external costs. From a Pigouvian taxation perspective, port charges should therefore be regressive in the number of containers handled. Moreover, we find that the external costs of maritime transports are severely understated when port operations are ignored. Our model allows determining the marginal productivities of port facilities. Thereby, it is instrumental in designing port charges that are diversified according to the quantity of containers handled and the service quality (i.e., the speed of handling operations). Regarding contextual factors, we find that establishing high-frequent liner services improves the ship working rate, while simultaneous calls at a terminal impede productivity. The type of container (loading/unloading; empty/laden) also appears to influence the duration of ship working.     

燃气轮机的大型集装箱船LNG燃料舱布置

为了满足环保新法规要求,很多船东首选LNG作为船用燃料。本文基于燃气轮机推进的大型集装箱船的布置特点及IGF规则的要求,对LNG燃料舱布置的位置和LNG燃料舱适用的形式进行了论证,获得了满足大型集装箱船性能需求和IGF规则要求的LNG燃料舱设计方案。     

集装箱运输组织信息集成模式研究

基于对集装箱运输组织流程的剖析,提出了集装箱运输组织信息的集成模式。这个模式涉及信息集成需求分析、体系结构的确定和基于多Agent的信息集成实现等内容。研究表明：集装箱运输组织必须得到来自不同信息源、具有不同特征的不同类型信息的支持、具有多数据源支持、集成分析功能多样和存储虚拟等特点．它可以通过建立虚拟视图的方式来实现基于多Agent的集装箱运输组织信息集成．