基于LabVIEW的鱼雷电磁引信干扰试验系统设计

水下电子对抗作战环境要求鱼雷电磁引信必须具备良好的抗干扰性能,为了评价电磁引信的抗干扰性能,在LabVIEW环境下设计了鱼雷电磁引信干扰试验系统,采用PXI总线连接试验系统的硬件实体,开发了基于PXI板卡的软件控制平台,由该软件平台控制整个系统完成扫频式干扰和回答式干扰,实现了试验系统的集成化和自动化。     

基于大数据分析的船舶通信网络优化研究

网络优化是提高船舶通信系统工作性能的重要方法,针对当前船舶通信网络优化存在工作效率低,节点能量消耗大等缺点,设计基于大数据分析的船舶通信网络优化方法。首先以数据传输能量最小为目标建立船舶通信网络优化的数学模型,然后将船舶通信网络优化问题看作为一个大数据分析处理,通过云平台对数学模型进行并行求解,每一个子任务组合模型对数据传输能耗进行预测,选择能耗最小路由进行数据传输,最后进行船舶通信网络优化方法性能的仿真测试。测试结果表明,本文可以有效对船舶通信网络进行优化,提高了船舶通信系统的数据传输速度和成功率,具有十分广泛的应用前景。     

WEB前端开发技术在船舶通信数据可视化中的应用

针对传统的船舶通信数据可视化方法存在数据过滤性能较差的问题,提出设计一种基于WEB前端开发技术的船舶通信数据可视化方法。时域信息作为船舶通信数据的一个重要属性,包括持续通信时间与系统时间,它们的属性分别为跨度与刻度,采用不同的方式对二者进行处理。获取船舶通信数据中节点间的通信流具体数量与通信总数量,利用获取数据对节点聚类进行计算,根据聚类指数计算船舶通信节点作用力。利用Web前端开发技术对船舶通信数据棒状图的图标进行绘制,最终实现船舶通信数据可视化。为了证明该方法的数据过滤性能较好,将原有方法与基于Web前端开发技术的船舶通信数据可视化方法进行对比实验,实验结果证明该方法的数据过滤性能优于传统方法。     

基于PXI测试仪的通信设备故障检测平台设计与实现

通信装备故障的快速诊断定位是现场维修保障的重要课题。采用PXI虚拟测试技术和LabVIEW编程方法设计、实现了通信装备的通用故障检测平台。实验表明,该测试平台对通信装备故障分析判断准确,提供数据全面,并且操作简单、使用方便,灵活性强,自动化程度高,具有很强的实用价值。     

船舶通信系统中的信道分配算法设计

船舶通信系统的信道分配可有效均衡信道负载、节约通信开销,为此,提出基于新的船舶通信系统信道分配算法。首先建立船舶通信系统的通信能耗模型,然后采用链路节点自适应收发方法均衡控制船舶通信系统信道分配,并采用链路节点自适应收发控制模型控制不同接收阵元,建立节点和资源信息调度之间的联系,达到合理分配船舶通信系统信道,最后对船舶通信系统信道分配算法的性能进行仿真测试。结果表明,本文方法提高了船舶通信系统的吞吐量,使各信道之间的负载更加均衡,能够大幅度降低船舶通信系统通信开销,是一种有效的船舶通信系统信道分配算法。     

舰船电力系统通信网络安全智能监测系统

现有的舰船电力系统通信网络安全监测系统所采用的安全监测逻辑,普遍为软件层的异常流量分析方案。在电力数据流量节点并行的异构状态下,此种监测方式存在很大的数据绕行漏洞,严重威胁舰船电力系统通信网络的安全。因此,提出并设计了舰船电力系统通信网络安全智能监测系统。在电力系统信号输出端设计异常流量监控硬件,为监控流量节点的异常行为分析计算提供平台支持;对通信层流量进行异常行为分析计算,锁定存在异常行为的节点位置;然后对异常节点进行针对性拦截提取计算,并搭建正常通信流量与服务器间的交互通道,实现舰船电力系统通信网络的安全智能监测。通过对比实验,对提出设计进行可行性验证。     

基于嵌入式的船舶电子通信系统的设计

针对海上环境变化莫测,采用传统系统受到信号干扰影响,导致通信能力较差,为了解决该问题,提出了基于嵌入式的船舶电子通信系统设计。以C8051f020单片机为核心,设计硬件平台。通过平台信令信道接收来自其他节点呼叫信息,并将接收到的路由信息发送给信道单片机,采用检错后重新发送方式控制数据帧发送,设计复位电路,实现系统数据帧抗干扰传送以及用户按键复位功能。采用C/S模式,以S3C2410平台作为服务器,将PC主机作为客户端,设计系统通信流程,利用vi编辑工具编辑romfs配置文件脚本文件格式,由此完成船舶电子通信系统设计。通过实验对比结果可知,该系统最高通信能力可达到98%,使嵌入式设备可通过网络与其他通信系统进行信息交换。     

云平台环境下船舶信息资源共享方法分析

云计算平台在船舶通信与信息共享领域发挥着重要的作用,在云计算平台环境下设计了一种基于Mediator中介器的船舶信息资源共享方法研究。分析了云平台下船舶信息资源共享的基本模式,并利用船舶Mediator节点构成了一个海上信息资源共享通信网络;给出了依托于节点架构设定的信息资源共享流程,并采用了公钥与私钥相结合的载密方式,提高船舶数据资源共享时的安全性。仿真实验结果表明,提出的信息资源共享方案的效率更高,并且能够使船舶通信系统的均衡负载值保持在一个较低的水平。     

基于AECMF的光纤惯导稳定平台通信策略研究

通信系统是数字化稳定平台控制系统的关键环节,针对稳定平台高波特率、高数据更新率的通信需求,制定了基于AECMF多串口卡的通信策略.对AECMF多串口卡的工作原理及特点进行了介绍,设计了通信程序流程,基于VC++编程实现了串行通信.实验结果表明,通信系统工作稳定可靠.     

受冲击舰船通信网络交汇信号节点滤波系统设计

传统的通信网络交汇信号节点滤波系统存在实时性较差的缺陷,为此提出受冲击舰船通信网络交汇信号节点滤波系统设计。通信网络交汇信号节点滤波系统硬件设计包括芯片选择、FPGA器件选择与滤波电路设计,软件设计包括FPGA程序设计、通信网络设计与信号节点滤波设计,通过硬件与软件的设计实现了通信网络交汇信号节点滤波系统的运行。通过实验得到,设计的通信网络交汇信号节点滤波系统信号处理时间比传统系统快了30 s,说明设计的通信网络交汇信号节点滤波系统具备极高的实时性与有效性。     

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.     

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。     

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.