船舶电力系统发展历程与展望

本文回顾了船舶电力系统的发展历程,包括早期以直流为主的电力系统概况和当前基于交流电制的电力系统的现状和特点,并就电力系统发展面临的挑战等问题进行探讨,最后结合现代工业化发展方向,从人工智能、信息安全、云计算平台等方面,预测船舶电力系统未来的发展。     

大型船舶电力系统自适应保护算法设计

近年来,电力推进技术和船载电子设备发展迅速,对大型船舶的电力系统提出了更高的要求,电力系统的性能和可靠性对船舶的正常运行有重要的意义。由于船舶电力系统网络结构复杂、工作环境恶劣,电力系统很容易发生短路、单相接地等故障,而传统的继电保护已经难以满足现代电力系统的可靠性需求。本文针对大型船舶电力系统的可靠性问题,采用了自适应保护算法和自适应粒子群算法,对船舶电力系统的网络结构进行了优化。     

船舶电力系统自动化及电机保护设计

船舶运输在全球运输中扮演着重要角色,而船舶电力系统的安全及稳定性是船舶运输安全的重要保证。在这种背景下,本文简要介绍了船舶电力系统自动化的现状,对船舶自动化电力系统进行设计,包括工控机模块、显示模块、PLC监控执行模块,重点介绍并实现了船舶电力系统中自动并车功能,最后提出了几点电机保护设计。本文提出的船舶电力自动化系统能够有效提高船舶运营效率,提升船舶电力系统工作的稳定性。     

粒子群优化算法在船舶电力系统脆性最大崩溃路径中的仿真研究

电力系统是船舶的重要组成部分,主要由柴油发电机、配电网络、配电板和用电设备等组成,其平稳运行决定了船载用电设备的工作性能。船舶电力系统的结构复杂,工作环境恶劣,因此在内部和外部干扰下很容易发生系统的崩溃问题。本文针对船舶电力系统的脆性模型,结合粒子群优化算法,对船舶电力系统脆性最大崩溃路径进行仿真研究,对提高船舶电力系统安全性和稳定性具有重要的指导作用。     

船舶电力系统无功优化过程的自适应粒子群算法应用

随着现代船舶工业的需要,船载用电设备的数量越来越多,船舶电力系统的容量也越来越大。船载用电设备在提高船舶自动化水平的同时,也对船舶电力系统的稳定性、安全性、节能性等提出更高要求。其中,船舶电力系统网络的无功损耗问题一直是相关领域的研究重点。电力系统的无功优化是指当系统的结构参数、负载等保持不变的情况下,通过改善船舶电力系统电源的电压等参数,调节电网的潮流计算,无功优化对提高船舶电力系统的供电效率,降低事故发生率等有重要的作用。本文系统的介绍了自适应粒子群算法,并将该粒子群寻优算法应用到船舶电力系统的无功优化过程中,对于改善电力系统的无功优化过程有重要的意义。     

大数据分析技术的船舶信息安全态势估计

目前研究的船舶信息安全态势估计方法估算时间过长,估算结果与实际结果吻合度较低。为解决上述问题,基于大数据分析技术提出了一种新的船舶信息安全态势估计方法,建立了大数据分析技术的船舶信息安全态势估计模型,获取多类不确定信息并进行联合和分析,对船舶信息安全的态势、威胁及安全程度进行实时评价,完成对船舶信息安全的态势估计和预测。实验结果表明,大数据分析技术的船舶信息安全态势估计方法能够缩短估算时间,提高估算结果与实际结果的吻合度。     

大型船舶电力系统脆性中的粒子群优化算法研究

随着自动化技术和电力推进技术在船舶工业的广泛应用,船舶电力系统的稳定性、可靠性显得更加重要,针对大型船舶电力系统的脆性优化也引起了国内外的广泛研究。大型船舶电力系统的故障恢复和脆性优化具有重要意义,一方面可以提高船舶电力系统的可靠性,为船载用电设备提供充足的电力;另一方面,电力系统网络结构的优化有助于提高电力系统的集成特性,降低成本的同时可以提高供电效率。本文主要研究了大型船舶电力系统的脆性优化问题,采用了粒子群优化算法和脆性建模技术,对全面分析复杂的船舶电力系统,预防和控制电力系统脆性故障,提高电力系统可靠性具有重要的理论和实际应用价值。     

MMC在船舶中压直流电力系统中的应用

随着船舶自动化程度的不断提高,船载电力设备的数量和功率也在不断增加,一方面提高了船舶的运行质量,另一方面也对船舶电力系统的性能提出了更高的要求。为了满足日益增大的电力功率需求,传统的船舶低压电力系统逐渐被中压直流电力系统所取代。中压直流电力系统具有稳定性高、输电损耗小等优点,目前获得了较广泛的应用。本文针对船舶中压直流电力系统的变流与功率优化问题,开发了一种基于MMC多电平换流器的船舶中压直流电力控制系统,并详细介绍了中压直流电力系统和MMC多电平换流器拓扑结构的原理,具有重要的意义。     

梯形船舶电力系统网重构模型及算法设计

船舶电力系统网络是船舶内部重要的输配电网络,负责为各种船载设备、仪器和系统提供动力和能源,是整艘船舶中最不可或缺的部分。在船舶日常航行中,电力系统网络往往会出现多种故障,由于船舶电力系统网络的特殊构造,局部的故障往往会对网络的其他部分产生较大的影响。为避免这一情况的发生,通常采用网络重构的方法,隔离故障网络和正常网络,使得电力网络能够不受局部故障的影响,继续为其他设备和仪器提供电力。本文对梯形船舶电力系统网络进行研究,提出一种固定费用网络流模型,并设计相应的解决方法,证明本文提出的方法能够有效解决梯形船舶电力系统网络的重构问题。     

马尔可夫模型在船舶电站可维修建模中的应用

对于船舶电力系统来说,长时间的航行过程需要电力系统能够可靠运行,并且维修性强。本文针对这一问题,在船舶电力系统的基本模型的基础上,结合马尔可夫模型,提出一种新的船舶电力系统维修性模型。该数学模型给出船舶电站的维修性表达式,可以更加简洁明了地表示船舶电力系统的可靠性和可用度。     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.