基于传感器网络的船舶舱室火灾远程监控系统

由于传输信道中存在随机干扰,监控系统受到干扰后输出的信号中存在随机误差,从而导致传统的船舶舱室火灾远程监控系统实时性差,为此设计一种基于传感器网络的船舶舱室火灾远程监控系统。在系统的硬件部分,通过温度传感器实时测量温度,利用无线收发模块传输监控数据,并采用数据采集卡采集监控数据。在系统软件部分,利用传感器网络中的无线通信技术感知实时监测的信息,采用数字滤波方法抑制有效信号中的干扰成分,输出监控信号,以此完成基于传感器网络的船舶舱室火灾远程监控系统的设计。实验以明火发现时间与阴燃火发现时间为实验指标。结果表明,所设计的系统比传统的基于红外技术的船舶舱室火灾远程监控系统与基于蓝牙技术的船舶舱室火灾远程监控系统发现明火、阴燃火的时间短,证明所设计的监控系统实时性能好,能够及时发现火灾情况。     

一种基于LoRa的船舶机舱数据采集系统

面向运营船舶机舱监测系统技术改造需求,设计一种基于LoRa(Long Range Radio)的数据采集系统.通过无线传感器和边缘计算获取舱室内各设备的状态信息,基于LoRa网关汇集并存储无线网络数据,实现对船舶机舱设备状态信息的采集,并设计上位机软件对数据进行管理分析.该系统设计为机舱监测提供了一种通用的低成本数据采集解决方案.     

船舶机电设备无线振动监测实验研究

为验证无线传感器网络及其架构在船舶舱室机电设备振动测试上应用的可行性。文章通过分析无线传感器网络的优势,对现有无线传感器振动监测节点进行改进,设计了一种适合于船舶舱室的高采样频率无线传感器节点及其振动监测系统,结合所开发的无线传感器网络监测系统讨论了传感器系统架构、监测节点以及软件的设计;以有线监测设备为测试对比对象,通过现场试验,比较研究无线传感器监测设备和有线监测设备在系统构架、数据采集、数据传输、数据精度等方面的表现,验证无线传感器监测节点在船舶舱室机电设备振动监测应用中的可行性。     

异构网络在船舶控制舱室远程监测中的应用

船舶自动化水平的提高要求实现对船舶的实时监控,船舶控制舱室是船舶自动化系统的重要组成部分,对控制舱室进行监控可以准确了解船舶的运行状态,最大程度保障船舶运行安全。本文对异构网络进行了研究,提出了一种基于异构网络的船舶控制舱室远程监测系统,系统使用现场总线技术、以太网、因特网、4G网络等实现控制舱室监控数据的传输和共享,设计了系统的整体架构,系统使用B/S结构,最后对服务器的数据库进行了设计。系统可以实现控制舱室的远程监控,因而具有一定的实际意义。     

3G无线通信在船舶舱室火灾远程监控系统中的应用

我国是世界上船舶最多的国家之一,船舶火灾近年来给我国造成了巨大的经济损失和人员伤亡。现代船舶,特别是运输危险品的船舶一旦发生火灾所造成的后果一般都很严重。传统的船舶舱室火灾监控系统只能监控火灾状态,而无法及时和岸基监控中心取得联系,本文提出一种基于3G无线通信技术的船舶舱室远程监控系统,设计了系统结构,对3G无线通信模块的硬件和软件实现进行了研究。系统能够实现远程监控和报警,并在火灾发生后能够快速反应,并且系统成本低,可靠性高。     

一种船舶舱室火灾报警优先级评估模型

舱室是船舶的重要组成部分。当某舱室发生火灾时,其相邻舱室极易引发连锁性起火,此时如果报警系统不能及时、准确、可靠地给出各舱室的关联报警信息,就会对整个船舶造成严重危害。为了增加船舶火灾报警系统的早期预警与关联报警功能,分析了通常情况下典型船舶舱室的火灾报警判别要素并对其进行量化,建立舱室火灾报警优先级BP神经网络评估模型,运用LM算法对该评估模型进行学习训练,并通过测试样本验证该船舶舱室火灾报警优先级评估模型的可行性与准确性。该方法有助于提高报警系统对各舱室火灾探测报警的准确性,从而可降低由于舱室关联起火而导致发生船舶重大损失的概率。     

基于CAN总线和Zigbee的船舶人员位置及舱室环境动态感知的研究

本文针对大型船舶的安全监控问题,基于CAN总线和Zigbee无线网络设计了面向船舶人员位置与舱室环境的动态感知网络。首先,采用Zigbee无线网络实现了船舶人员的无线移动定位。同时,在相关舱室配置了温度传感器、烟雾传感器等,实现了相关舱室的高温、火灾等极端环境动态信息采集和环境风险的动态评估。主站与各个舱室子站之间采用CAN总线实现有线通信,克服了船舶舱室的电磁屏蔽效应。该系统可以有效提高船舶安全管理的信息化程度。     

物联网环境下船舶舱室噪声的快速预报系统设计

传统船舶舱室噪声预报系统能够适用在部分船舶的舱室内,但无法连接物联网设备,并且反馈速度较慢。为此设计物联网环境下船舶舱室噪声的快速预报系统。优化预报系统硬件反馈形式,缩短硬件反馈流程的路径,增设噪声辐射传递网络,保证传递的流畅程度;确定舰船结构振动传递特性,计算船舶舱室噪声传递结构参数,使用物联网连接控制界面对噪音进行分析预报,实现船舶舱室噪声快速预报系统设计。实验数据表明,设计的预报系统能够在物联网环境下,完成快速准确的噪音传递预报。     

基于图像处理的船舶舱室设计缺陷检测系统

对舱室设计缺陷进行检测是船舶制造过程中的必经步骤。传统的舱室设计缺陷检测依赖于现场检测人员的经验和检验设备的精度,检测效率较低,船舶大型化对设计缺陷检测提出了新要求。本文在充分研究图像处理技术的基础上,提出一种船舶舱室设计缺陷检测系统,设计了系统的整体结构,并对系统进行了测试。测试结果表明,系统可以实现对舱室结构参数的基本检测,同时对墙面裂缝可以做到自动识别和判定,大幅度提升了舱室设计缺陷检测的工作效率和准确率。     

浅谈危化品船舶固定灭火系统构成及检查方法

灭火设备被安装在船舶某一固定场所,然后用金属管连接到船舶需要保护的舱室,这套灭火系统就称为船舶固定灭火系统,它是船舶发生初级火灾后船员自救的重要消防设施。常见的船舶固定灭火系统有:水灭火系统、水喷     

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。