H轮造水机产水量的分析

文章结合H轮造水机的产水量异常现象,介绍船舶造水机的工作原理,分析影响产水量的各种因素,提出相应的管理措施。旨在提高造水机的使用性能,保证产水量,为船舶正常航行提供有力保障。     

船用ALFA-LAVAL真空蒸馏造水机结垢原因分析及处理方法

文章阐述了影响船用ALFA-LAVAL真空蒸馏造水机产水量的因素,重点对结垢的原理进行分析,并结合实践总结了除垢的主要方法.     

新型船用海水淡化装置的设计研究

针对目前市场上普遍使用的船用分离式板式造水机外壳体积大、成本高等问题,提出一种新型海水淡化装置。该装置通过换热板片的结构优化以及流道合理设计,摒弃原有装置厚重的铜制外壳,大大缩减装置体积、降低生产成本,安装维护更加方便。计算分析表明,新装置结构合理可靠,造水比、单位热耗率、单位淡水能耗等热力学性能指标均明显优于传统分离式造水机。该文借助ANSYS Workbench平台对新型海水淡化装置总体结构进行了力学性能仿真与分析,进一步验证了文中所设计的新型海水淡化装置的合理性与可靠性。     

船用造水机常见故障原因及对策

远洋运输船舶上的造水机对于运输的经济效益和航情变化的应对能力具有十分重要的意义。一旦遇到造水机发生故障,不仅影响船员的正常生活,还会危及船舶的运输安全,因此保证造水机正常工作,提供充足的淡水就显得非常必要。文章对造水机常见故障的原因进行了分析,并提出了一些对策措施,对提高航运的经济性和安全性,具有重要意义。     

船舶造水机产水盐度异常的探讨

结合船舶造水机的产水盐度异常现象,介绍船舶造水机的工作原理,分析影响产水盐度的各种因素,提出相应的管理措施.     

船用造水机故障诊断及处理对策

简要说明船用造水机的工作原理和系统组成,以某轮航运过程中出现淡水产量不足问题为例,运用理论知识系统地分析该故障产生的机理,结合实践能力,采用逐一排除法确定故障发生的原因并采取行之有效的措施进行排除,最后根据该故障的性质,提出建设性的防范措施以免类似的故障频繁发生。本文排除船用造水机故障的思路和方法,同样适用于解决该系统其他异常状况,希望能给轮机管理人员快速正确地判断和处理故障提供有价值的借鉴。     

H30-CE型造水机故障处理

正0引言某公司30万吨级大型矿砂船均配备APV H30-CE型造水机。在使用过程中,同类型姊妹船先后出现造水机造水量少的情况,特别是在船舶满载时几乎无法造水。笔者以该型造水机故障为例,分析故障产生原因和处理过程,供同人参考。1参数及设计特点该型造水机设计造水量为30 t/d,需满足的条件为:加热介质流量60 m~3/h,蒸发器进口温度80℃,出口最大温度65℃,压差0. 3 bar;冷却介质流     

船用造水机的日常维护保养与故障检修

此文针对船用造水机常发生的故障,根据造水机的工作原理谈如何做好日常保养与故障维修工作。     

造水机故障排除实例

正0引言某日,某船主管轮机员发现船上造水机的造水量明显下降:由原来的11~12 t/d下降到2.8 t/d。观察发现,造水机真空度为90%,蒸发温度为45℃,并没有明显变化。因本航次由马来西亚巴生港至英国南开普敦港,航行距离较远,而船存淡水量不足,须及时解决造水机故障。1故障分析该船造水机型号为JWP-26-C100,是目前船舶普遍应用的一种真空沸腾式海水淡化装置,其蒸发     

VLCC造水机满载不能造水原因分析及解决方法

某VLCC某航次造水机空载时造水量基本正常,而满载时不能造水。经轮机人员分析、拆检,终于找到故障原因,并采取正确措施使造水机起死回生,圆满地解决了VLCC用水紧张难题。     

C4ISR系统信息质量对作战效果的影响分析

明确C4ISR系统信息质量对作战效果的影响是当前研究的热点与前沿问题。在介绍信息质量相关概念的基础上,研究C4ISR系统信息在物理域、信息域和认知域的转换过程以及转换过程中的信息质量度量方法。以对抗双方作战单位剩余数量为作战效果度量指标,从信息质量的完整性、正确性和精确性的指标入手,构建单兵种对单兵种条件下和多兵种对多兵种条件下的Lanchester方程,给出一般条件下的求解方法,由此形成C4ISR系统信息质量对作战效果的影响分析方法框架。     

The Effectiveness of Coastal Zone Management in the United States

The Coastal Zone Management Effectiveness Study was undertaken between 1995 and 1997 to determine how well state coastal management programs in the United States were implementing five of the core objectives of the U.S. Coastal Zone Management Act (CZMA). The five core objectives studied were: (1) protection of estuaries and coastal wetlands; (2) protection of beaches, dunes, bluffs and rocky shores; (3) provision of public access to the shore; (4) revitalization of urban waterfronts; and (5) accommodation of seaport development (as an illustration of the policy to give priority to coastal-dependent uses). Separate articles in this issue of Coastal Management report the findings of the five studies, each dealing with one of the core objectives. Each of the articles assesses issue importance, processes and tools used, and the limited outcome data available for that objective. This article provides an overview of the purposes of the study, the methodology used, the summary findings of each study, and overall conclusions and recommendations of the study team. State coastal programs are found to be effective in addressing the five CZMA objectives examined, but this conclusion is based on very limited information about program outcomes. A more definitive conclusion will require better outcome information. Coastal managers in the United States have not agreed upon indicators of success, which severely inhibits systematic and sustained collection of outcome information. A national outcome monitoring and performance evaluation system is recommended to address these deficiencies and allow better determinations of program effectiveness in the future.     

基于DEA的物流产业发展能力评估模型

以数据包络分析的方法建立物流产业发展能力的评估模型,以此为物流产业发展的优化与调整、物流产业的投资规模和投资政策、产业发展政策方面提供科学的依据。     

基于petri网的电控发射系统可靠性评估

以气动不平衡式鱼雷发射装置电控发射系统作为研究对象,针对电控发射系统的电控序列建立了petri网,得到标识可达树仿真结果,并以此对电控发射系统的可靠性进行分析评估.     

Maritime accident investigation and temporal determinants of maritime accidents: A case study

This paper presents the results of an investigation into temporal determinants of maritime accidents based on a data-set obtained from the proceedings of formal inquiries in the former German Democratic Republic (GDR). The results show that there is no statistically significant outcome between the probability for an accident and the time of watch. Thus the results do not confirm previous studies, which reported significant time of day effects.The outcome of this study indicates that marine inquiries can provide useful data for an analysis of underlying causes of maritime accidents. It is suggested that accident inquiries should be extended into the area of watch systems employed and should record the hours of work and of rest of the officers on the watch involved in a maritime accident.     

Protecting Estuaries and Coastal Wetlands through State Coastal Zone Management Programs

This article, one part of the National Coastal Zone Management Effectiveness Study, evaluates the effectiveness of state coastal management programs in protecting estuaries and coastal wetlands. State programs were evaluated in a four-step, indicatorbased process to estimate (1) the relative importance of the issue; (2) the potential effectiveness of programs based on the policies, processes, and tools used; (3) outcome effectiveness based on on-the-ground indicators; and (4) overall performance, where outcome effectiveness was compared to issue importance and potential effectiveness. State evaluations were synthesized to provide a national perspective on CZM contributions and effectiveness in estuary and wetland protection. Although on-the-ground outcome data were sparse, they were sufficient to determine at least probable levels of effectiveness for about one-third of the states. Of these states, 80% were performing at expected or higher levels, considering how important the issue was in their state, and the scope and strength of the policies, processes, and tools they had deployed. Monitoring and record keeping, freshwater wetland management, and the use of nonregulatory restoration in coastal management were common program weaknesses. The evaluation approach and indicators used here are recommended as a starting point for designing a national monitoring and performance evaluation system addressing this CZM objective.     

MARPOL73/78附则Ⅵ大气污染物排放控制的进展

文章以IMO大气污染通信工作组在2006年底召开的工作会议为背景,介绍了针对船用柴油发动机和燃料控制排放标准的讨论情况。     

Towards a short time “feature-based costing” for ship design

Cost is perhaps the most influential factor in the outcome of a product or service within many of today’s industries. Cost assessment during the early stage of ship design is crucial. It influences the go, no-go decision concerning a new development. Cost assessment occurs at various stages of ship design development. Economic evaluation as early as possible, in the design phase, is therefore vital to find the best pricefunction compromise for the ship projects. The authors have developed a feature-based costing model for cost effectiveness measurements intended to be used by ship designers for the real time control of cost process. The outcome is that corrective actions can be taken by management in a rather short time to actually improve or overcome predicted unfavourable performance.     

A simulation-based probabilistic design method for arctic sea transport systems

When designing an arctic cargo ship, it is necessary to consider multiple stochastic factors. This paper evaluates the merits of a simulation-based probabilistic design method specifically developed to deal with this challenge. The outcome of the paper indicates that the incorporation of simulations and probabilistic design parameters into the design process enables more informed design decisions. For instance, it enables the assessment of the stochastic transport capacity of an arctic ship, as well as of its long-term ice exposure that can be used to determine an appropriate level of ice-strengthening. The outcome of the paper also indicates that significant gains in transport system cost-efficiency can be obtained by extending the boundaries of the design task beyond the individual vessel. In the case of industrial shipping, this allows for instance the consideration of port-based cargo storage facilities allowing for temporary shortages in transport capacity and thus a reduction in the required fleet size / ship capacity.     

用于极地海域运输系统的基于模拟的概率设计方法（英文）

When designing an arctic cargo ship, it is necessary to consider multiple stochastic factors. This paper evaluates the merits of a simulation-based probabilistic design method specifically developed to deal with this challenge. The outcome of the paper indicates that the incorporation of simulations and probabilistic design parameters into the design process enables more informed design decisions. For instance, it enables the assessment of the stochastic transport capacity of an arctic ship, as well as of its long-term ice exposure that can be used to determine an appropriate level of ice-strengthening. The outcome of the paper also indicates that significant gains in transport system cost-efficiency can be obtained by extending the boundaries of the design task beyond the individual vessel. In the case of industrial shipping, this allows for instance the consideration of port-based cargo storage facilities allowing for temporary shortages in transport capacity and thus a reduction in the required fleet size/ship capacity.