集装箱异味检测和对装运食品影响的研究

分析了集装箱异味产生的原因,并引入MINIRAE2000 VOC检测仪对集装箱中的异味进行定量检测,寻找经验管理值。结合感官和仪器来检测集装箱异味对装运食品的影响。     

风险管理在集装箱适载检验工作中的运用

通过运用风险管理的方法,对集装箱适载检验工作中的风险进行识别、分析、评估,并采取一定的管理措施;对集装箱适载检验的分类管理进行深入研究,对现有的检验监管方式提出改进性建议。     

硫酰氟熏蒸处理集装箱扩散规律初步研究

[目的]研究硫酰氟施药后在集装箱内的扩散规律以及集装箱装载不同的物品对硫酰氟吸附和解吸附作用的差异。[方法]根据集装箱的体积计算施药量,施药后不同时间点及散毒后关闭集装箱门不同时间点,用硫酰氟浓度检测仪测定箱内硫酰氟浓度。[结果]硫酰氟在集装箱内分布不均匀,下层浓度高于中层,中层浓度高于上层。相同施药量时,装载废纸集装箱内硫酰氟实际测量浓度低于装载废塑料集装箱内测量浓度。散毒后再次关闭箱门,箱内物品吸附的硫酰氟解吸再次释放出来,装载废旧塑料集装箱的浓度明显高于废纸集装箱内的浓度。[结论]硫酰氟密度大于空气,是其在集装箱上部与下部浓度存在差别的原因。与废塑料相比,废纸的孔隙多,致密程度差,对硫酰氟的吸附与阻留作用强于废塑料,因而吸附硫酰氟的作用更明显,而解吸硫酰氟的速度正好相反,慢于废塑料。     

大型海运集装箱港口放射性安全方案研究

放射性检测仪器的合理设置是确保放射性检验工作有效的基础。本文参照国际原子能机构推荐的多极检查方案,结合大型港口进出场道口设置的2种模式,对放射性安全仪器的设置方案进行对比讨论,综合考虑全面覆盖、经济合理、计量维修便捷等因素,提出了放射性安全仪器设置的推荐方案,供日常检验参考。     

中国出口集装箱运价指数研究述评与未来展望

中国出口集装箱运价指数(China Containerized Freight Index,简称CCFI)是全球唯一用于反映集装箱运价的指数。该指数客观、及时地反映了中国集装箱航运市场运价变动情况。是否能够主动掌握CCFI指数的发展态势,及时准确地应对CCFI指数的波动,是政府和企业在市场上做出正确决策的关键。在总结中国出口集装箱运价指数研究现状的基础上,从CCFI指数的编制、波动特性、影响因素以及预测四个方面,系统地对已有相关研究进行述评并展望。     

A continuous time model for multiple yard crane scheduling with last minute job arrivals

Container terminal (CT) operations are often bottlenecked by slow YC (yard crane) movements. Efficient YC scheduling to reduce the PM waiting time is therefore critical in increasing a CT's throughput. This paper develops an efficient continuous time MILP model for YC scheduling. The model treats realistic operational constraints such as multiple inter-crane interference, fixed YC separation distances, simultaneous container storage/retrievals, realistic YC acceleration/deceleration stages and gantry time, and require far fewer integer variables than previous work. The model significantly improves the solution quality compared to the existing discrete time models and other heuristics found in the literature. Using heuristics and a rolling-horizon algorithm, our model can solve actual container yard (CY) problems quickly and robustly in polynomial time. Also, to cope with the last minute container arrivals which can disrupt routine CT operations, two methods for handling these last minute job insertions are discussed and compared.     

The simultaneous berth and quay crane allocation problem

This paper addresses efficient berth and crane allocation scheduling at a multi-user container terminal. First, we introduce a formulation for the simultaneous berth and crane allocation problem. Next, by employing genetic algorithm we develop a heuristic to find an approximate solution for the problem. The fitness value of a chromosome is obtained by crane transfer scheduling across berths, which is determined by a maximum flow problem-based algorithm based on a berth allocation problem solution defined by the chromosome. The results of numerical experiments show that the proposed heuristic is applicable to solve this difficult but essential terminal operation problem.     

湘江集装箱运输的竞争性分析及发展思路

湘江水路集装箱运输处在高速发展阶段,同时,湖南省铁路、公路集装箱运输是湘江水路集装箱运输的主要竞争对手。本文通过对其现状进行分析、比较,提出了湘江水路集装箱运输发展的思路。     

A freight transport optimization model for integrated network,service, and policy design

This paper presents a freight transport optimization model that simultaneously incorporates multimodal infrastructure, hub-based service network structures, and the various design objectives of multiple actors. The model has been calibrated and validated using real-life data from the case study of hinterland container transport of the Netherlands, where CO₂ pricing, terminal network configuration, and hub-service networks are chosen as the design measures. Policy packages combining multiple types of policies show better network performance as compared with the optimal performance resulting from a single policy type. This illustrates the value of incorporating multiple types of policies simultaneously in freight transport optimization.     

Joint planning of berth and yard allocation in transshipment terminals using multi-cluster stacking strategy

In this work, a joint planning problem for berth and yard allocation in transshipment terminals is addressed. Multi-cluster stacking strategy is proposed to split each transshipment flow into a number of container clusters and then stack each cluster in different yard blocks. A mixed integer quadratic programming model is formulated to minimize the total distance of exchanging containers between mother vessels and feeders, and the workload imbalance among yard blocks. A novel three-stage heuristic solution approach is developed and extensive numerical experiments are conducted to show the effectiveness of the proposed approach and the benefit of the multi-cluster strategy.