雷达视频压缩与解压缩的硬件设计

在对无失真数据压缩技术的现状和发展趋势的研究基础上,利用FPGA逻辑开发环境以及DSP开发系统研制了雷达视频压缩与解压缩硬件系统,详细阐述了压缩与解压缩硬件系统的原理设计以及逻辑开发.该系统在压缩过程中采用了无失真压缩与有损压缩相结合的方法,提高了雷达视频信号的压缩比.     

基于TMS320DM642的H.264视频编解码系统实现

实时性是视频应用的关键问题.视频压缩标准H.264因其计算复杂而不能满足实时性的需求.系统搭建了基于TMS320DM642的视频编/解码硬件平台,研究H.264视频压缩标准的DSP实现,并结合硬件平台对H.264代码进行相关优化,为实时视频信号编解码提供了保证.     

基于DSP的船舶电力监测系统设计

针对船舶电力监测的需要，利用DSP技术对电力监测系统进行了研究和开发。设计了一种基于DSP技术的电能质量监测仪，它主要完成现场数据的采集，然后利用DSP的快速运算能力进行电能质量参量的运算工作，最后把运算结果通过以太网口传送出去，同时将需要保存的数据保存到监测仪的存储器中。     

基于Matlab的NPC单相五电平H桥SPWM目标代码生成

介绍了基于Matlab／Target Support Package TC2的系统设计方法和开发流程，提出了一种基于嵌入式目标代码生成工具的中性点箝位（NPC）单相五电平正弦脉宽调制波产生方法，利用Matlab／Simulink工具建立了算法模型、仿真验证算法后，给出了以TMS320F28335浮点DSP为目标的五电平SPWM控制模型，并自动生成代码，编译、下载到目标DSP中运行，产生波形与理论吻合，体现了利用MATLAB进行系统设计与代码生成的简易性。     

基于图像处理的桥墩防撞预警系统的研究

利用图像处理硬件设备，通过摄像头将视频信息采入，送入DSP进行分析处理；专门视频信息处理软件，运用各种图像处理技术，进行实时处理分析，对船舶进行实时监控。当船舶进入预警区，经计算机判断处理，提醒监控人员并通过广播对船舶驾驶人员发出警告，避免事故发生。 在图像序列处理技术的开发中，采用软硬件分离的方法，先进行基于Visual C＋＋的计算机软件设计研究；在软件中，研究了船舶检测、船舶跟踪与计算等内容。     

现代化大型工厂远程监控系统设计与实现

随着数字图像处理技术的日益成熟和通信带宽的日益提高,以应用数字图像处理技术为核心的远程图像监控系统已经成为一种发展趋势.针对现代化大型工厂的生产和安全对远程、实时监控的需要,设计了一种基于DSP技术的远程监控系统,本文简述了该系统的硬件组成,重点介绍了监控系统的软件设计和实现.该系统可通过局域网、互联网、等实时传送现场图像、声音以及各种监控数据,具有视频压缩、解码、网络传输、图像储存、图像索引回放、摄像机远程控制以及图像移动侦测报警等功能.     

基于GPRS的远程视频监控系统研究

探讨了使用GPRS网络实现远程视频监控技术,提出使用专用视频压缩芯片实现MPEG-4视频压缩的系统设计方案。同时使用基于ARM7的嵌入式系统结构实现了视频监控终端的软硬件设计。终端通过高性能GPRS模块接入网络。针对视频数据通信的特点,定制了高效的用户协议,实现了监控终端和监控中心间可靠的数据传输。     

船舶设计工作流模式选择

工作流技术将成为下一代基于网络的OA等系统的集成平台，把工作流技术引入船舶设计制造工程管理活动中意义重大。微软公司随同vista一同发布的WWF（Windows Workflow Foundation），即工作流基础框架为工作流系统开发提供了基础平台。本文就基于WWF进行船舶设计工作流系统设计开发中的必须面对的工作流模式选择闯题进行探讨。工作流模式的选择与实际业务流程特点密切相关，文中通过对工作流技术的分析，结合船舶设计活动的流程特点，对船舶设计工作流模式的选择提出个人看法。     

Linux2．6内核下基于PCI总线的DSP设备驱动程序实现

针对Linux2．6版本内核，提出了基于PCI总线的DSP设备驱动程序实现框架，将在Linux下看作字符设备的DSP设备驱动与PCI设备驱动整合，通过在PCI初始化回调函数中对字符设备的注册和资源申请，以及虚拟文件系统接口的注册实现系统对通过PCI总线与主机进行数据交互的DSP设备的正确支持。为工程中设计有DSP设备的系统集成提供了指导。     

基于DSP的船舶导航系统设计

船舶导航技术不断向着高精度、高性能、高可靠的方向发展。为满足海上船舶的高精度导航需求,本文设计一种基于DSP的船舶导航系统。该系统通过结合DSP和FPGA,能够实现高性能、高精度、易部署的船舶导航服务,具有较高的实用价值。系统结构采用TMS320C6747芯片作为核心处理器,并搭建相应的硬件平台,开发对应的软件驱动,采用模块化的设计方法,对系统进行初步实现。通过实验验证与实践检验,证明本文提出的导航系统能够有效实现导航信息获取、处理、分析等功能。     

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.     

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.