面向船舶分段胎架管理的物联网构建及应用

为解决船舶分段建造过程中工艺数据实时采集与应用方面的问题,以胎架工艺装备为载体,构建一套面向船舶分段胎架管理的物联网系统。该系统由数据获取层、数据传输层和数据管理层构成,其中:数据获取层由传感器设备实现数据采集;数据传输层由ZigBee无线网络保证采集的数据实时传输;数据管理层由开发的分段建造工艺系统支撑,为胎架管理提供数据基础。试验结果表明:该系统能有效采集、传输、分析和存储船舶分段建造过程中的工艺数据,并通过系统软件对胎架进行远程控制。相比传统的分段建造模式,该方法能极大地提高工艺数据采集与胎架管理水平,为后续船舶智能制造模式的发展提供参考。     

焊接工艺参数记录分析仪研究

以DOS6．0为操作平台，通过C语言编程实现高速和低速交替进行数据采集、数据分析、数据存取和显示，方便快捷地获得焊接过程信号特征和规律分析结果，对电弧焊焊接过程实时动态监测。     

物联网环境下的船载航行数据实时采集

相较于其他交通手段来说,船舶运行的距离更远,想要完成数据的实时采集十分困难。传统的船载航行数据采集只是注重采集的精准度和采集的数量,很少关注实时采集这一问题。基于物联网环境研究了一种新的数据实时采集方法,设计了数据采集架构图,通过多信道的方式共同将数据反馈给中心系统,有效提高采集效率。采集模块共分为5个,分别为计划数据采集模块、设备数据采集模块、环境数据采集模块、人员数据采集模块以及辅助数据采集模块。通过神经元网络算法编写采集流程,并给出流程图。为了检验该方法的工作性能,与传统方法设置了对比实验,由实验结果可知,该方法的采集效率极高,反馈速度快,工作延时低,实时性能好。     

基于无线网络的舰船实时导航数据采集与传输研究

研究基于无线网络的舰船实时导航数据采集与传输,满足舰船实时导航数据传输的多样性需求。利用GPS接收机、罗兰C接收机、多普勒计程仪等导航数据采集设备,采集舰船位置信息、航行速度等实时导航数据,所采集数据利用无线局域网传输至舰船导航系统。无线局域网编码处理舰船实时导航数据与通信信道,采用信道加密方法加密编码后数据,利用压缩感知算法重构加密后数据,完成无线局域网的数据接收;数据接收的反向操作即数据发送过程,通过数据接收与发送2个过程,实现舰船实时导航数据传输。实验结果表明,该方法利用平台罗经仪有效采集舰船首向角数据,不同类型的舰船实时导航数据传输均未存在丢包情况。     

基于VC多线程的实时数据采集系统

在工业数据采集和处理系统中如何提高实时性和通用性，是设计人员要着重考虑的问题。本文着重介绍了在Windows环境下，利用VC＋＋多线程技术，进行实时数据采集的方法，成功地实现了数据采集的准确性和实时性，并且整个系统运行良好。     

基于虚拟仪器的船舶电机测试与监测系统

以虚拟仪器技术构建了电机测试与监测系统平台,给出相关的硬件实现和软件设计流程,实现了多路电压与电流的数据采集、数据管理, 并根据相关理论和所测得电压和电流信号的相关参数计算出电机的输入功率、功率因数等其他物理量,实现了实时数据监测.试验结果表明,测试效果良好,验证了测试与监测系统的可行性和有效性.     

基于MES的船舶建造数据采集系统研究

针对传统的船舶制造业在生产过程中生产数据记录滞后,实时监控和统计困难,数据的可靠性差,利用率低等问题,提出基于MES的船体建造数据采集系统。对数据采集点的选择、采集信息的存储、采集过程、采集方式进行论述。提出基于条码技术的数据采集方法,设计和开发生产数据采集原型系统。     

空心方块斜坡堤施工技术

为探索空心方块斜坡堤施工技术,制定工程实施方案,以空心方块水下安装技术为主要研究对象,运用卫星定位技术、位移传感技术、专用软件和数据采集处理技术,开发水下安装定位系统,实时监控安放过程,实现了对不可视过程的精确控制,施工实践证明这项技术达到了预期效果.     

J-TEXT托卡马克的数据采集和数据服务系统

J-TEXT托卡马克是用来研究热核聚变的实验装置.数据系统是其重要组成部分,由数据采集和数据服务组成.数据采集部分选用PCI总线采集卡,采集程序用LabVIEW编写,运行在Windows操作系统之下.数据服务采用MDSplus软件包,选用Redhat Linux Enterprise为操作系统.本文阐述了该系统的数据流程与实现过程.     

基于Labview电子鼻数据采集系统在配气室中的应用

介绍了电子鼻数据采集系统的工作原理及设计流程,使用LabVIEW语言实现了数据采集过程中程序的编写,显现出了计算机与数据采集相结合的强大功能。     

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

正~~     

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。