使用数据挖掘实现舰船故障数据定位

为了更好地保障船舶航行安全,有效提高船舶的故障定位和检测能力,提出了使用数据挖掘实现舰船故障数据定位方法,通过对舰船故障数据进行实时采集和分类挖掘获取船舶航行过程中的异常数据,实现对船舶故障数据关联规则特征的准确提取。在进行故障定位的过程中,合理并利用电磁探测器和声敏传感器等设备进行故障诊断,并对不同类别船舶故障数据的高维特征融合的研究采用数据挖掘分析算法,利用数据挖掘分类器对船舶故障数据进行分类识别和定位挖掘,从而有效保障船舶故障数据定位的精确度和有效性。最后通过实验结果表明,使用数据挖掘实现舰船故障数据定位方法具有较高的故障定位精度。可以应用于船舶故障实时诊断,有效提高船舶故障诊断的实时性。     

基于人工势场法的船舶自动导航算法设计

在船舶的自动化导航系统中,结合了GPS和北斗导航技术,通过2种定位系统的数据融合,能够实现非常高精度的位置定位和导航服务。但是在陌生水域航行时,船舶依然可能会面临定位失败的问题,从而给船舶的安全航行带来严重的安全隐患。本文主要研究了人工势场法在船舶定位导航领域的应用,通过人工势场技术,船员能够快速对导航的位置信息进行监测,极大增强了定位的精度,特别是融合了导航算法后,能够实现自动化智能航行的功能。     

Web技术在舰船信息一体化中的应用

在互联网技术和大数据技术快速发展的今天,舰船的信息一体化处理技术也发生了巨大的变化,面对未来越来越复杂的海洋航行环境,舰船的控制信息处理和航行安全环境监测变得更加重要。因此本文主要结合互联网Web技术,建立高速的信息化数据处理平台,能够实时收集和分析舰船通信和控制系统中产生的海量数据,本文主要介绍了基于Web技术的硬件平台,包括电源、信号采集等模块,然后重点介绍了软件实现原理,通过构建先进的信息报警平台,实现了对舰船故障的实时监测,极大地提高了整个舰船在恶劣环境下的生存能力。     

动力定位系统下船舶运动姿态自适应调整研究

设计船舶动力定位系统控制算法,使动力定位系统在船舶低速航行时通过对船首的调整实现对船舶运动姿态控制,从而实现船舶运动姿态的自适应调整。     

船舶动力定位系统中的非线性滤波器设计研究

船舶动力定位系统主要作用是维持船舶在航行过程中的位置和方向,保证航行的安全。为了克服海面水流和风力对船舶航行造成的影响,需要动力系统中的滤波系统对船舶的综合位置信号进行分离,以消除干扰,从而能够精确控制船舶姿态。本文在研究船舶定位系统的基础上,建立理想状态下的动力定位模型,并利用卡尔曼滤波算法和贝叶斯估计模型获得精确的样本,最后与非线性滤波控制系统联合仿真,以此得到精确的仿真模型。仿真结果表明,此滤波算法具有良好的适应性,能够满足动力定位系统的需求。     

基于无线传感器网络的船舶动力定位系统的研究

随着海洋开发领域的扩大,对船舶航行及停泊位置精确要求越来越严,动力定位系统成为大型船舶必不可少的设备之一。船舶动力定位系统通过传感器采集自身的动力状态及周围环境数据,再通过数据融合确定所需的推进力。针对采集数据分布广、类型多样的特性,利用无线传感网络分布式结构具有较好的处理性能。本文研究大型船舶动力定位系统数学模型,在此基础上设计基于无线传感网络的数据融合处理系统,最后进行仿真。     

无线网络在舰船安全监测系统中的应用

为确定无线网络主机的实际应用价值,从而实现对船舶航行轨迹的安全性监测,针对无线网络在舰船安全监测系统中的实际应用能力展开研究。以网络执行主机作为船舶航行轨迹数据的核心生成设备,联合数据收发模块与网关设备元件,实现系统的硬件执行环境搭建。在此基础上,导入航行轨迹监测数据,通过信息定位处理的方式,实现系统的软件执行环境搭建,结合相关硬件设备结构,完成基于无线网络的舰船安全监测系统设计。对比实验结果表明,与点迹型监测系统相比,无线网络型监测系统对船舶航行轨迹的把控精准度可达到90%以上,能够实现对无线网络主机的合理化利用。     

基于多媒体网络的舰船图像定位自动匹配系统设计

为了更好地实现船舶的安全航行,基于多媒体网络技术的优越性,本文构建基于多媒体网络技术的舰船图像定位自动匹配系统,并对整个系统的关键技术和系统性能进行研究,该系统能够实时处理、传输大量的多媒体数据,通过SIFT图像匹配算法,可以实现舰船图像定位的自动匹配。实验结果表明,系统性能良好,匹配平均时间为5.23 ms,匹配的成功率可以达到90%,为舰船的安全航行提供了可靠的保障。     

船舶动力定位系统的非线性输出反馈控制研究

传统的船舶动力系统,主要依赖于人工控制,因此不可避免地存在人为失误,导致船舶动力控制失败,造成航行安全。而新型的船舶动力定位系统,主要依赖于电气化控制设备和自动化控制程序,并且系统的复杂度决定了必须采用先进的非线性控制算法,对动力系统进行优化。本文主要研究了船舶动力定位系统的非线性变量,并建立了基于全局的水面船舶轨迹预测算法,通过对控制器中的反馈环路进行优化,提高动力定位系统的稳定性及鲁棒性,同时结合云计算系统,将动力定位系统的数据采集后,进行大数据特性分析,从整体上提高了船舶的航行控制能力。     

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...     

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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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.     

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.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。