医院船改装配电系统的设计及应用

为了保障医院船配电系统的安全可靠运行,产品符合实际操作及使用要求,保障船舶设备及人员的安全,节约医院船设计成本以及运营成本,文章对船舶改装前及改装后的电力负荷进行分析研究,根据船舶设备及医疗设备的使用要求对配电系统进行合理、规范的设计,配电系统在改装后发电机功率得到合理的分配利用,提供了医疗手术部经济实效的供电方案。     

基于计算机网络的船舶视频图像模糊细节增强算法

为了提高船舶视频图像的质量,针对图像模糊问题,设计了基于计算机网络的船舶视频图像模糊细节增强算法。首先分析引起船舶视频图像模糊的因素,并提出采用无线传感器网络对船舶视频图像进行采集和传输,然后对船舶视频图像进行增强处理,丰富船舶视频图像细节信息,改善船舶视频图像视觉效果,最后实现了船舶视频图像模糊细节增强实验,结果表明,本文算法对船舶视频图像进行增强处理后,图像更加自然,并采用定量分析指标对船舶视频图像质量进行评价,获得比其他算法更优的船舶视频图像模糊细节增强效果。     

极地冰区船舶发展分析

分析了极地冰区船舶发展的背景,对极地航道、资源开发等因素等进行论述,认为发展极地冰区船舶是未来船舶行业发展的重要方向。研究了与极地航行船舶相关的规范、规则的发展情况,认为规范和规则对极地冰区船舶的运行安全和减少排放等要求日趋严格,各船级社对极地船舶的设计要求和验证方法逐渐统一。介绍了当今世界主要的破冰船船型及动力系统,并对极地冰区船舶的发展特点进行分析。     

船体结构设计的理念及其对船舶建造的影响

为提高船体结构设计水平,文章对船体结构设计的理念及其对船舶建造的影响进行介绍,并对设计中细节处理措施和提高生产工艺性的方法进行分析。研究表明：船舶结构设计理念可有效提升设计水平,为船舶制造业的可持续发展提供技术保障。研究成果可为船体结构设计提供一定参考。     

船舶医疗废水及废弃物处理技术

阐述船舶医疗废水、废弃物的性质及处理排放要求,从废水预处理、采用船舶污水处理系统收集处理的医疗废水以及医疗废物焚烧、高温高压消毒处理等方面对船舶医疗废水及废弃物处理技术进行分析,探讨船舶医疗废水及废弃物处理设施的实船配置概念方案。     

船舶辐射的空气噪声分析与控制研究

为了研究船舶辐射的空气噪声的分布特点和控制方法,以某LNG FSRU为研究对象,建立船舶辐射的空气噪声分析流程,并开展针对性的降噪设计研究。首先对比了主流船级社近期推出的船舶辐射的空气噪声标准。然后基于统计能量法对目标船的近场辐射空气噪声进行数值分析,并与实测结果进行对比,验证数值分析结果的可靠性;最后,开展与船舶有一定距离点的辐射空气噪声预报,结合辐射空气噪声的要求识别主导噪声源,开展有针对性的降噪设计,使其满足辐射空气噪声控制要求。论文所建立的船舶辐射的空气噪声的预报及控制流程,可为后续民用船舶的设计提供技术参考。     

基于DSP的船用燃气轮机并车控制系统开发

燃气轮机被广泛应用于船舶的动力装置,其具有装置简单、成本低、污染少等优点。船舶运行在不同工况下会对船舶的动力系统提出不同要求,为了保证船舶运行的稳定性,实现负荷在不同燃气轮机之间的转移。本文使用DSP 28335芯片为核心控制元件,设计了一种船用燃气轮机并车控制系统,分析了燃气轮机的结构和工作原理,研究了2台燃气轮机的并车策略,最后设计了硬件电路。系统具有很高的可靠性和稳定性。     

船舶全生命周期振动噪声分析综述

在新时代船舶设计大型化、专业化、智能化和绿色化的要求下，振动噪声设计面临激励力增大、专业化需求增加、智能化要求提高和结构刚度降低等挑战。通过总结和评价船舶全生命周期振动噪声设计研究现状，按振动噪声分析、振动噪声监测评价和振动噪声控制治理的设计顺序综述船舶结构中振动噪声研究方法和研究结果，并对今后的研究进行展望，旨在为相关设计人员与研究人员提供参考，从而更好地保障船舶安全、稳定、舒适地运营。     

逆光船舶图像恢复方法

为了改善逆光船舶图像恢复的质量,设计了基于改进全变分算法的逆光船舶图像恢复方法。首先对逆光船舶图像恢复研究现状进行分析,找到引起当前逆光船舶图像恢复效果差的原因,然后建立逆光船舶图像糊模和退化模型,并引入全变分算法对逆光船舶图像进行恢复,对标准全变分算法的局限性进行改进,最后进行逆光船舶图像恢复的验证性测试实验,结果表明,本文方法提高了逆光船舶图像的信噪比,可以大幅度丰富逆光船舶图像的细节信息,使恢复的逆光船舶图像更加清晰。     

全结构网络技术在螺旋桨水动力性能预报中的应用

螺旋桨是船舶动力系统的重要组成部分,随着船舶逐渐向着高速化、大载重方向发展,对船舶的动力性能有了更高的要求,也对螺旋桨的推进效率、噪声性能等有了更高的要求。在船舶螺旋桨的设计和优化过程中,计算流体力学CFD发挥了非常重要的作用,包括螺旋桨水动力性能分析、空泡特征预测等。本文主要研究了船舶螺旋桨的运动模型和水动力方程,在此基础上采用了全结构网络技术对螺旋桨模型进行网格划分,并对螺旋桨的水动力性能进行了基于软件Fluent的性能仿真和预报。     

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。     

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）.     

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.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

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.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。