共查询到20条相似文献,搜索用时 140 毫秒
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徐青 《交通部上海船舶运输科学研究所学报》2013,36(2)
干散货自动清舱监控系统信息平台是“干散货自动清舱方法研究”项目系统中信息流通和汇总的中心,同时也是项目中各数据成果的集中体现,是用户管理、信息监控的操作终端.对自动清舱系统的结构进行了说明,根据清舱系统的功能以及信息流向,确定信息平台的功能需求.利用紫金桥船舶监控组态软件实现了系统信息平台的软件搭建. 相似文献
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文章探讨了损伤树方法的思想及其在舰艇损管系统评估中的应用,建立了评估损管系统生命力的步骤和模型,并通过对某舰损管系统生命力的分析和计算,为其损管系统的设计提供了有价值的建议. 相似文献
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沉管隧道具有埋深浅、断面大等优势.香港沙中线隧道横跨维多利亚湾,连接九龙和香港岛,由11节沉管组成.文章针对沙中线隧道建设中遇到的异形沉管的安装难题,在研究异形管节坐标系建立、姿态监测系统建立校准、RTK GPS校准的基础上,开发了一套沉管安装对接监控系统,指导了异形沉管E1、E10和E11的安装对接.此外,给出了沉管... 相似文献
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王浩 《交通部上海船舶运输科学研究所学报》2013,36(2)
为了实现干散货全自动清舱系统中工作站与智能清舱机间的通信,对ZigBee无线通信技术进行研究.采用对数距离损耗模型分析ZigBee的传输距离,并对传输延时以及传输速度进行测试.根据在船舱内ZigBee实验的结果,设计ZigBee应用方案. 相似文献
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立管强度分析是海底管道设计的重要内容之一.针对绑扎式立管系统,应用有限元软件AUTOPIPE 8.5建立乐东22-1气田外输立管系统的模型,并分别依据DNV-OS-F101、DNV 1981、ASME B31.8三种设计规范对其进行强度计算.综合考虑规范对立管强度的要求,防止发生压溃和屈曲扩展的要求及限制立管发生漂浮的要求三个条件,确定了满足条件的最小壁厚.最后根据计算结果比较了三种规范对于立管强度计算的不同适用性. 相似文献
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文章从保证船舶安全航行的角度出发,分析了柴油发电机跳电故障的原因.在分析柴油机油量控制机构的结构、工作原理的基础上,对故障进行了排除. 相似文献
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介绍了城轨直流控制系统短路形式及特点。对城轨用直流断路器各分闸方式的固有动作时间进行对比,论证了脉冲脱扣保护的优势。 相似文献
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以经济、人口、车辆保有和广义出行时间为基本变量,采用回归分析方法建立交通生成预测模型,从而在交通生成阶段中考虑了交通出行条件改善的影响,将交通生成预测和诱增交通预测两者结合,既考虑了社会经济对交通的决定作用,又考虑了交通供给对交通生成的反作用。模型应用于江苏省高速公路网规划实践,结果表明,模型能够反映不同地区经济、人口、车辆保有以及交通条件等因素对各地区交通生成特性的差异,并且具有实用、精度高、可操作性强的特点。 相似文献
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As a guarantee of life quality, older people’s travel demand has to be satisfied, so understanding their travel demand is important. An important point to bear in mind is that older people are not a homogeneous group but that distinguishing between older women and older men in their mobility needs and travel patterns is necessary. Older people’s travel demand needs to be investigated from many different aspects, including trip generation, travel time, and mode choice. In this study, the investigation is focused on older people’s trip chaining, including trip chain complexity, tour composition in a chain. 相似文献
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Hiroshi Matsukura Maytouch Udommahuntisuk Hiroyuki Yamato A. A. B. Dinariyana 《Journal of Marine Science and Technology》2010,15(1):34-43
This research discusses domestic feeder container transportation connected with international trades in Japan. Optimal round
trip courses of container ship fleet from the perspective of CO2 emission reduction are calculated and analyzed to obtain basic knowledge about CO2 emission reduction in the container feeder transportation system. Specifically, based on the weekly origin–destination (OD)
data at a hub port (Kobe) and other related transportation data, the ship routes are designed by employing a mathematical
modeling approach. First, a mixed integer programming model is formulated and solved by using an optimization software that
employs branch and bound algorithm. The objective function of the model is to minimize the CO2 emission subject to necessary (and partially simplified) constraints. The model is then tested on various types of ships
with different speed and capacity. Moreover, it is also tested on various waiting times at hub port to investigate the effect
in CO2 emission of the designated fleet. Both the assessment method of container feeder transportation and the transportation’s
basic insights in view of CO2 emission are shown through the analysis. 相似文献
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Entering the 21st century, one of the most significant demographic changes in developed countries is the aging of the population. Travel is an important aspect of older people's economic well-being, so with the aging of the population, improving transport for older people is increasingly important. This article presents the results of a study of older people's travel behaviour based largely but not exclusively on LATS (London Area Travel Survey) 2001 data. The focus is on older people's trip chaining behaviour, including trip chain complexity, trip purpose sequence and mode choice in a chain. After identifying the policy implications it looks at the role of Special Transport Services in improving the supply of transport for older people, taking the London Borough of Camden as a case study. 相似文献