高压断路器的在线监测系统的研究

高压断路器是电力系统中最重要的开关设备之一。它在电网设备入网或退网时的切换操作中能够起到开关控制的作用,因此在电力设备或电路发生故障时,可以快速通过高压断路器的开关操作将其移除。通过在线监测可以了解高压断路器的运行状态,尽早发现潜在故障,及时采取预防措施,保障电网运行的可靠性。针对高压断路器的在线监测系统可以减少过早或不必要的维护,提高高压断路器维护的针对性,提升开关设备的使用寿命,提高电力系统的可靠性。论文介绍了基于高压断路器振动信号的在线监测系统。该系统利用小波变换分析方法对现场采集到的断路器振动信号进行分析,反映断路器动触点的运行平顺性和机械部件运行的平稳性。通过性能分析表明,反映高压断路器机械状态变化的最强烈的频带集中在采集信号的高频部分,并且在高压断路器正常工作时,采集的振动信号近似为一个平滑的随机过程。     

圆筒型FPSO防爆墙设计研究

基于圆筒型FPSO上部模块布置特点,分析了"希望6号"圆筒型平台的防爆墙设计要点,通过引入定量风险分析方法,确定可燃性气体泄漏概率,对不同防爆墙布置方案进行评估,消除了重大安全风险,保障了人员生命和设备安全。     

图像声纳在油气田气体泄漏监测中的应用

中国是海洋大国,这片蓝色疆土中有着丰富的资源,因此开发利用海洋资源对我国的可持续发展有着重大的意义。对海洋的探索已不仅仅只限于军事目的,也转向了民用目的,如海底资源开发、石油勘探、自动绘制海底地形地貌图等。油气田是海底开采石油、运输石油的大型民用项目,油气管道是在海底连续输送大量油气物质的密闭型联通容器。油气管道所输送的油气为有害的易燃易爆物质,一旦管道发生泄漏或断裂,会对其周围的环境和人员产生严重的后果,所以对油气田气体泄漏的监测成为一项关键技术,能够及时避免事故的发生。对处于深海的水下结构来说,监测气体泄漏的首选方法是水下声学监测,论文主要研究图像声纳在油气田气体泄漏监测中的应用。     

海上老平台新增电气房气体灭火系统方案设计

新增电气房是近几年海上老平台改造中经常遇到的问题.按规范要求,对新增电气房需要设置气体灭火系统,这通常可通过改造原有气体灭火系统或新增气体灭火系统加以解决.结合JZ9-3油田DRPW平台新增电气房气体灭火系统的方案设计,从灭火效果,环境保护、对象安全性、人员安全性、海上应用、方案实施难度、经济性等方面阐述设计方案比选的思路和方法,以期对今后的开发工程提供借鉴.     

港口自动化起重机传动机构在线监测系统

为了实时掌握港口自动化起重机的健康状态,保障自动化起重机生产和安全,开发了一种传动机构在线监测系统。该系统通过安装在相对应的传动机构上的传感器进行检测和数据采集,由智能监测站进行数据上传至在线监测平台,在线监测平台对上传数据进行实时分析诊断,并通过界面展示诊断结果。应用情况表明,该系统能有效预防重大故障发生,并为港口维护人员提拱自动化起重机维护保养数据信息和故障检修方案。     

直流断路器大容量试验室的现状与进展

本文介绍了直流断路器的工作原理和分断能力试验方法，比较了几种直流断路器大容量试验室的试验能力，重点介绍了高压直流断路器的合成回路试验技术，认为大容量试验室是推动断路器专业发展的重要技术平台。     

六氟化硫制备与纯化技术

概述了六氟化硫(SF6)的制备方法———直接化合法,电解法及纯化方法———吸收法和吸附法。通过这些方法,可以得到满足市场需求的SF6产品气体。     

六氟化硫制备与纯化技术

本文概述了六氟化硫(SF6)的制备方法—直接化合法、电解法及纯化方法—吸收法和吸附法。通过上述方法,可以得到满足市场需求的SF6产品气体。     

基于油耗率的船用低速柴油机燃烧故障诊断

以BW 6S35ME-B9型船用低速二冲程柴油机为研究对象,在已搭建柴油机试验平台上展开试验并在线监控采集其状态特征参数,如缸内压力、扭矩、排气温度、缸套冷却水温度、油耗总量和油耗率等,为故障的诊断排除提供有效依据。研究结果表明:基于多个柴油机状态特征参数诊断6号缸高压油泵出口燃油泄漏,有效地提高诊断工作的效率,尤其是船舶柴油机燃油消耗率监控在船上的应用,有效简化诊断过程以提高故障诊断和排除效率。研究内容对未来船舶智能故障诊断有着重要的指导意义。     

海工平台应急关断系统设计与分析

为减小作业过程中可能产生的火灾、可燃气体泄漏等事故对海工平台和作业人员造成的损害,根据相关规范要求,对某型3级动力定位（Class 3 Dynamic Positioning,DP3）钻井船应急关断系统的特点及设计步骤进行详细阐述,并对应急关断系统的设计理念和方法进行总结和归纳。研究成果可为海工平台应急关断系统的设计提供一定参考。     

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。