海船通过苏通大桥航法初探

苏通大桥的建设有利于促进江苏北部城市融入上海经济圈,对于江苏的经济、社会发展都具有重大深远的战略意义。文章分析了桥区的水流情况和通航状况,给出了海船通过苏通大桥的航行导则、基本航法及注意事项,并提出了改善桥区通航环境的建议和解决办法,以利于保障大桥水域船舶航行安全。     

Collaborative Logistics from the Perspective of Road Transportation Companies

ABSTRACT

To survive under the ever increasing competitive and global pressures to operate more efficiently, transportation companies are obliged to adopt a collaborative focus. Various types of cooperative supply chain relationships have been discussed in both professional and academic literature over the last decades. However, research on horizontal cooperation in logistics remains scarce and scattered across various research domains. Companies operating at the same level of the supply chain and performing comparable logistics functions may cooperate horizontally to increase their productivity, improve their service level and enhance their market position. In this paper, the focus is on the operational planning of horizontal cooperations between road transportation carriers. Following a scientific literature review, a distinction may be made between two operational approaches to horizontal logistics collaboration: order sharing and capacity sharing. For both research streams, a detailed overview of solution techniques proposed in literature is presented. Moreover, some interesting opportunities for future research are identified.     

健康传播在国际学界研究的格局、径路、理论与趋势

健康传播研究起始于美国并以美国为主导、美欧为主体的学术领域;以医患关系为起始点、以传播学理论为研究框架、以促进公众健康为主要目标的七大研究径路;呈现出研究主体逐渐由个人转向公众、学科性日趋明显的发展趋势。这些结论都是建立在三大索引数据库数据与数十本国际研究专著基础上得出的结论。     

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合理优化牵引变电所维修计划是确保电气化铁路稳定、高效运营的重要前提条件. 本文在分析牵引变电所结构特征与设备可靠性、建立维修费用计算方法的基础上,构建以维修费用为约束条件的、基于可靠性最大的维修计划优化模型. 考虑到牵引变电所构成的复杂性,本文进一步设计了基于单个设备维修计划优化的启发式求解算法流程,提出基于供电系统可靠性分析的牵引变电所维修计划调整方法. 本文还以电气化电路牵引变电所的实际调研数据为基础开展案例研究,应用所建模型及求解方法获得维修计划优化方案,验证了优化模型与求解算法的有效性与实用性.     

浅谈汽车新能源与节能技术的应用

随着我国社会经济水平的不断提升,人们的消费水平随之提升,因此汽车不再是奢侈品而是普通消费品。近年来,我国汽车的数量逐渐增长,故而汽车尾气排放量随之不断增长,对我国的大气污染问题日益严重,最终降低了城市居民与乡镇居民的日常生活质量。