船舶机舱监控系统的电磁兼容性分析

对船舶机舱主机监控系统的电磁兼容问题进行了详细分析,对由传感器引入的干扰途径及抑制方法进行了深入探讨。同时给出了主机监控系统电源部分的抗干扰措施和相关实验结果,以及抗干扰电缆的选用方法。降低了故障发生频率,确保了船舶机舱监控系统稳定可靠地工作。     

数据库可逆性关键数据隐藏方法研究

船舶监控系统主要采集船舶主机、电力系统、导航系统、通信系统和机舱等运行状态信息,信号类型包括图像、声音、电流等,为了保障船舶监控系统的高效运行,必须配置性能良好的数据库管理系统。本文的研究对象是船舶监控系统数据库,重点针对监控系统数据库中的数据可逆性、数据推理以及关键数据隐藏等进行了研究,主要运用了SQL Server数据库来搭建监控系统数据管理系统。     

基于labview的船舶主机机旁监控装置的设计

舰船自动化一直是船舶工业的发展重点,随着控制技术和自动化设备的进步,传统的船舶机械式设备逐渐被取代,不仅提高了船舶主要系统的运行效率,更提高了船舶的可操作性和安全性。Labview程序控制平台是美国NI公司开发的一种新型可编程控制平台,具有可靠性高、集成程度高、灵活性强等优点,目前在小型工业系统、实验设备等方面应用广泛。船舶主机是其动力来源,主机的正常运行具有重要的意义,为了提高船舶主机的运行安全性,本文开发了一种基于labview平台的船舶主机机旁监控装置,并详细介绍了该监控装置的原理和Labview程序设计过程。     

船舶主机性能指标测试系统的改进

针对船舶主机转速传感器性能指标测试存在的缺陷,在主机中引入分布式智能监控系统,对系统进行分级管理、分散控制。介绍了系统的硬件特性和软件功能。     

基于PROFIBUS总线通信的船舶配电设备监控系统设计

船舶配电设备网络化和信息化是现代船舶设备发展的趋势。本文提出了一个基于PROFIBUS通信的船舶配电设备配电监控系统的设计方法,并对船舶配电设备监控系统的原理、结构、监控系统与配电设备之间的通信以及监控系统与上级系统之间的通信设计进行了详细介绍。     

微机在船舶监控系统的应用研究

在船舶集中监测报警系统中，利用微电脑处理机将船舶所有监测点连接成网络，便于集中管理与控制。船舶监控系统对船舶各部位的火警、机舱中主机与辅机的油、水温和油烟浓度等重要参数起检测及监控作用。     

基于CAN现场总线的船舶机舱分布式监控系统的研究

随着船舶工业技术的不断发展,尤其是船用微机技术的不断提高,各类高科技数字化智能设备,广泛应用在船舶的主机遥控系统、主机安全保护系统、机舱综合报警系统、各种导航助航设备中,这对船舶的运行和管理起到了智能化、自动化的作用,也为船舶的安全运行起到促进作用.对AUT-0型无人机舱的船舶,机舱监控报警系统要长期连续运行,机舱内环境恶劣,系统不仅要克服船舶的震动、摇摆以及各种电气设备的电磁干扰,还要适应机舱内的潮湿、有腐蚀性的盐雾等环境.因此要求机舱报警系统可靠性高、实时性好、系统容量大、抗震、扩充性和耐腐蚀能力强.正基于此,本文研制基于CAN现场总线的船舶机舱分布式监控系统,实践证明:CAN总线的机舱分布式监控系统优于以往的集中式分布系统,指明了现代船舶机舱监控手段的发展方向.     

某船主机系统滑油消耗异常故障实例

正0引言在船舶燃润料的耗用中,主机滑油消耗主要包括气缸油消耗和系统滑油消耗。在船舶营运管理中,须不断监控主机系统滑油的品质以维持主机的运行性能,同时控制气缸油和系统滑油的消耗以节约成本。主机系统滑油的日常管理主要包括监控消耗量、分离净化以及定期取样化验[1]等。笔者主要论述主机系统滑油消耗异常的排除过程、故障分析和维修管理建议,供同人参考。1故障和排查过程1.1故障排查某船主机型号为瓦锡兰5RT-flex 58T-D,最大输     

舰载网络化监控系统

船舶监测、报警装置是现代船舶必不可少的设备之一，现代舰艇也采用了一些对主机系统的监控装置，随着电子信息技术和自动控制技术的不断发展，现代化船舶和舰艇的信息处理能力、作战系统网络化、控制自动化程度越来越高，舰艇指挥员需要扩大对舰艇各部分状态的感知。鉴于这种情况，建立基于现行全舰网络的舰载网络化监控系统是必须的。根据这一发展趋势对舰载网络化监控相关技术进行了研究。     

用科学发展观打造"数字海事"

利用现代化计算机技术、网络技术和空间数据获取与处理技术，通过船舶交管系统、自动船报系统和工业电视监控系统等信息化系统，实现对船舶的全方位监控，并为快速处置船舶各种事故和制订搜救方案提供科学依据。     

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。