一种基于物联网的海上气象传输系统设计

在海洋航运业中,对气候变化的准确快速获取是保证其安全行驶的关键要素之一。海洋气候具有变化速度快﹑气温不稳定的特性,对其信息的准确高精度采集及有效传输是海上气象系统的重要研究方向。本文分析了近年来热门的物联网技术,将无线传输器与传感网络(WSN)应用到海面气象传输系统的设计中。最后对气象传输系统中的无线路由算法(LEACH)进行了分析及优化。最后通过仿真实验得到优化后的海上气象传输系统的性能有较大的提升。     

海上数据通信中的物联网交互技术研究

随着现代船用电子信息系统的发展,各电子设备之间及与设备与信息中心的数据交互越加频繁,交互量越来越大,传统的基于无线通信架构的数据通信系统已经越来越不能满足海上大量数据的交互性能要求。物联网是一种全新的互联结构,其数据采集﹑传输是基于RFID射频技术﹑传感器技术及无线传感网络技术,能够高效的对船用通信数据进行处理。本文研究海上无线通信网络与物联网结构,提出基于物联网结构的拥塞算法,极大提高了海上通信网络系统容量。     

物联网在船舶安全监测系统中的应用研究

随着海上航运业的发展,船舶的海上安全航行成为关系到整个航运业务的发展,一套实时高效的船舶安全监测系统指导船舶航程的关键设备。传统的船舶安全监测系统基于总线结构,随着监控维度的增加,其实时性﹑准确性已经越来越不能满足现代航运业的要求。本文在研究了物联网架构的基础上,将物联网各技术应用至海上远程监控系统中,构建了基于无线传感器及Zigbee无线传感网络的船舶安全监测系统,最后给出了系统的软件实现。     

物联网感知在船用信息系统中的应用

现代船用电子设备种类的增加使得船舶信息处理系统所需采集处理的数据量也越来越大,如海上气象传感网络﹑船舶目标跟踪系统﹑避碰撞系统及雷达定位系统等。如何高效地对这些数据采集﹑处理决定着船用信息系统的性能。同时,近年来随着海底光纤的铺设以及物联网技术的发展,基于光纤的物联网信息采集系统能提高数据采集精度及效率。本文将物联网感知及光纤信息采集传输技术运用于船用信息系统中,有效解决船用信息系统的性能瓶颈。     

物联网结构在舰船多目标检测系统中的研究

舰船多目标检测系统是海上军事领域的重要研究方向之一。随着物联网技术的发展,无线传感网络在舰船多目标识别系统中的应用越来越广,其无线传感网络的节能问题﹑通信带宽及信道衰落都影响着目标检测系统的时效性及准确性。本文研究现有的多传感器网络的目标检测系统原理,重点分析基于舰船纯方位角度的多目标检测跟踪算法,并利用UFK方法对算法中的非线性扰动问题进行分析,解决多目标检测中的滑动窗口稳定性问题,最后进行仿真。     

无线传感网络的海上多信道通信技术

在现代海上通信系统中,基于多信道传输的无线通信技术因具有良好的信道吞吐容量及较高信号传输率而应用广泛。但海面多信道传输具有多径干扰及通信传输网络在多信道分布不均匀的缺点,因而基于无线传感器的信号采集及传输网络在海上开发及军事方面也得到了应用。本文在研究现代海上无线传感网络及多信道通信系统的基础上,利用分簇原理设计优化现有的多信道无线传感网中的MAC算法,并进行仿真。     

面向物联网体系的海上通信云平台

随着海上通信平台应用业务的扩展,如物联网体系海上视频监控系统、气象传感网络及目标探测系统等,所有这些系统的数据传输及消息传递都基于海上通信平台,所以一个高效、实时性好并且传输速率高的通信平台是成为海上电子信息系统应用的关键。而云计算平台是基于虚拟化、分布式及并行计算的信息系统,能够有效提高信息计算、传输及存储效率。本文在研究现有海上通信系统及云平台技术的基础上,提出面向物联网体系的海上通信平台,并进行仿真。     

物联网在海岸信息系统方案中的应用

随着海洋开发及运输业的发展,通信技术及电子信息技术的海上船舶应用系统越来越多,如海上气象检测系统﹑船舶导航系统﹑船舶交通通信系统及目标跟踪系统等,如何对这些功能系统进行有效管理是海岸信息系统需要解决的难题。物联网通过各种类型的传感器将分布的实体连成一个整体的网络。本文研究基于无线物联网的海岸信息管理平台,给出系统的总体架构,并在此基础上对其中的关键技术进行重点分析,最后给出实现方案。     

无线传感网络在海上作战定位系统中的作用

对舰船位置的精确定位及信息反馈在现代化海上作战指挥系统中尤为重要。无线传感网络由众多具有数据采集、信息处理及无线通信传感器节点组成的网络,它作为海上目标定位及信息传输关键网络在作战中起到关键作用。本文首先分析海上作战无线传感网络结构,研究了网络的可靠性、安全性及定位精确性问题。最后设计一种RSSI传感网络稳定定位方法,通过对采集信息的分层采样及对无线传感网络的离散化处理,提高了定位精度。     

海上无线传感网络多帧图像处理的ARM嵌入式架构系统

随着传感网络技术的发展,基于此技术的图像处理系统及视频监控系统在海上信息化中的应用越来越广泛,如目标跟踪﹑海底探测及环境监测。多帧图像处理由于在同一时刻处理数据量大,需要的网络带宽及计算能力相比于单一图像更多,如何保障基于无线传感网络的多帧图像处理系统的时效性及准确性是系统性能关键所在。本文利用ARM嵌入式处理器设计一套高效的基于无线传感网络的多帧图像处理系统,仿真表明其性能达到要求。     

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.     

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.