VHF技术在舰船实时动态监控系统开发的应用

舰船实时动态监控系统融合了导航、监视、通信、控制、显示以及管理等诸多功能,属于综合性航行系统,被广泛应用于现代航海领域中。长期以来,舰船实时动态监控系统的重要性也逐渐突显出来,在实际应用过程中,也应与时俱进地实现创新发展。作为舰船的重要组成部分,该系统的核心作用也不容小觑,属于全新航海技术,能够确保海上航行的安全性,并不断优化舰船航行效率。特别是在实践应用方面,舰船实时监控的能力得以提高,可以有效降低舰船之间的碰撞率,为舰船的安全稳定行驶提供了必要保障。     

分布式海上舰船远程监控系统算法研究

海上舰船机舱监控系统通过对机舱内运行的动力系统监控,实时获取运行的参数及状态,通过对数据及图像的分析处理来发现或预知问题以便及时修理。所以一个精确﹑实时性好的舰船监控系统是保障其航行安全必不可少的设备之一。相比较于传统的单中心平台舰船监控系统,分布式网络监控平台具有更高的时效性。本文在研究现有舰船机舱监控系统的基础上,对系统中的数据库建立﹑大数据融合以及图像信号处理以及实时性通信等关键问题进行优化,并给出系统的整体实现方案。     

基于CDMA网络的船舶在线式监控系统开发

在线式监控系统的功能是采集船舶的位置信息、机电设备的运行参数信息、船舶航行状态信息等,通过信息的分析和处理,获取舰船的实时工作状态,监控舰船运行状态是否存在异常.因此,信息的时效性对于舰船监控系统的性能有关键性的影响.CDMA是一种第三代移动通信网络技术,结合CDMA网络技术实现了移动舰船终端的准确定位,并结合CDMA...     

视频通信技术舰船航行异常监控系统

传统的舰船航行异常监控系统以数字信息传递,不能精准地传递图像信息,难以在短时间内确定舰船航行异常行为。为了解决这一问题,基于视频通信技术设计了一种新的舰船航行异常监控系统,信号变送器、工控机、舰船PLC、网络中心服务器等组成舰船航行异常监控系统总体架构,应用传感器、传感器和电路接口构建信号变送器,选用ISP-521型号舰船工控机,以西门子L-460型号PLC控制器作为PLC的整体运行基础,通过逻辑指令、组织关系、信息验证实现软件工作。实验结果表明,基于视频通信技术的舰船航行异常监控系统通过图像传递能够在短时间发现舰船航行异常。     

粒子群优化算法在舰船路径优化仿真中的应用

为保障舰船安全稳定航行,显著提升舰船续航能力,设计了基于粒子群算法的舰船路径优化方法。使用概率图法构建舰船航行路线图,按舰船在航行性能方面的评价指标,构建与舰船航行路线图相关、综合考虑舰船转弯角度以及地形威胁等约束的舰船航行路径优化模型,并应用改进粒子群算法求解所构模型,得到满足约束条件的舰船航行初始最优路径。之后通过删除冗余点的方式对舰船航行初始最优路径实施平滑优化处理,得到最终的舰船航行最优路径。实验结果表明,该方法可收获更优的舰船航行路径,舰船按该路径行驶,更有利于续航,使舰船航行任务得以有效完成。     

基于傅里叶分析的舰船航行安全监控系统

针对当前舰船航行安全监控系统在运行时,监控测量精度较低,导致系统测量的周期性脉冲信号较为分散的问题,设计基于傅里叶分析的舰船航行安全监控系统。硬件部分设计舰船航行安全监控控制器,实现监控控制模块功能,设计安全监控信号输出接口,分析船用发动机各种状态参数。软件部分设计采用高精度傅里叶分析法,接收监控测频数据,制定串口通信程序数据分析过程。设计监控信号接口输出代码,通过监控信号接口输出分析结果,完成舰船航行安全监控系统设计。测试结果表明,基于傅里叶分析的舰船航行安全监控系统监控测量的周期性脉冲信号较为集中,能够有效提高监控测量精度。     

无线网络的舰船航行环境信息实时采集

舰船航行环境非常复杂,对舰船航行环境信息实时采集对提升舰船航行安全性具有重要意义,同时也为实现舰船的无人驾驶提供重要基础。本文提出一种基于ZigBee无线传感网络的舰船航行环境信息采集系统,阐述ZigBee无线传感网络3种拓扑结构的原理,并分析ZigBee无线传感网络协议体系,构建舰船航行环境信息实时采集系统的整体架构,重点设计无线网络传感器节点,阐述系统的软件模块的功能,并使用系统对海水盐度及浪高进行测试,证明系统可以有效使用Zig Bee无线传感网络对船舶航行环境信息进行测量,系统具有较高的稳定性和准确性。     

基于传感器网络的舰船行驶系统振动检测

根据振动检测结果可以知道舰船行驶系统的工作性能,传统方法无法有效的实现舰船行驶系统振动检测,为了提高舰船行驶系统振动检测精度,设计了基于传感器网络的舰船行驶系统振动检测方法。首先分析当前舰船行驶系统振动检测研究进展,并指出当前各种舰船行驶系统振动检测方法的缺陷,然后采用传感器采集舰船行驶系统振动检测信号,并对舰船行驶系统振动检测信号进行消噪,最后构建了舰船行驶系统振动检测模型,并通过仿真实验分析舰船行驶系统振动检测方法的性能,结果表明,本文方法可以准确描述舰船行驶系统振动检测信号变化特点,获得高精度的舰船行驶系统振动检测结果。     

舰船火灾和爆炸等危险源的危险评估技术研究

舰船在海上行驶的过程中,火灾与爆炸均会对其行驶安全性造成威胁。近年来,基于科学技术的不断进步与发展,舰船的自动化与大型化发展趋势愈加明显,加之火灾荷载构成相对复杂,直接增加了不同类型舰船发生火灾与爆炸事故的几率。目前,国内舰船防火与防爆的研究并不成熟,且未设置专门机构展开进一步研究,所以,要想确保舰船海上航行的安全性,就必须要高度重视舰船火灾和爆炸等危险源的危险评估重要性,本文主要研究了船舶火灾危险源的评估技术,并提出了改善优化措施。只有这样,才能够不断提高舰船的安全行驶效果,为海上事业发展提供必要保障。     

改进分布式网络测控技术的舰船电站监控系统

现有的舰船电站监控系统,存在着自动化程度低的缺陷。为了解决上述问题,引入改进分布式网络测控技术设计舰船电站监控系统。舰船电站监控系统硬件设计包括电能计量芯片选择、电参数采集电路设计与通信接口设计;系统软件设计包括数据采集模块、数据存储模块与舰船电站测控模块。通过系统硬件与软件的设计,实现了基于改进分布式网络测控技术的舰船电站监控系统的运行。实验结果显示,与现有舰船电站监控系统相比较,设计的舰船电站监控系统极大地提升了自动化程度,充分说明设计的基于改进分布式网络测控技术的舰船电站控制系统具备更好的性能。     

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;     

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.     

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.     

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。     

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.