轨道移动式装卸机械的防雷

雷电会对港口装卸设备造成危害.轨道移动式装卸机械的行走机构和回转机构均通过滚轮与轨道接触,主要钢结构通过轴销或螺栓连接,涉及到通讯、控制等电子设备的防雷.     

航标终端电子设备感应雷防护研究

文中针对广东省现有航标遥测终端电子设备感应雷的防护研究,调研分析感应雷对航标电子终端设备的影响,分析航标终端电子设备防雷的特点,在此基础上研制新型的航标电子设备防雷装置。     

基于工程实例分析等电位联结的重要性

等电位联结是防触电、防雷电、防电磁干扰、防静电的保护措施。本文介绍了等电位联结的种类,阐述了电气设计等电位联结的作用以及重要性。并通过工程实例,计算分析了在TN-C-S型接地系统发生接地故障时,重复接地和等电位联结对降低人体接触电压的作用。计算结果表明,实施总等电位联结能够达到防电击的效果。在设计过程中应该对等电位联结措施予以足够的重视。     

偏远地区通信机房防雷研究

针对偏远地区通信机房环境特点,分析了雷电及过电压侵入通信设备的途径及危害。针对通信机房防雷、防过压方面存在的隐患,结合机房内通信设备防雷要求,研究了从房屋、电源、信号线、天馈线等方面综合防雷技术的应用。     

基于多Agent的分布式信号流模型故障诊断方法研究

针对大型复杂电子设备故障诊断问题,在叙述常用智能故障诊断方法手段基础上,利用Agent技术,提出了多Agent的分布式信号流模型故障诊断方法,综合采用系统故障D矩阵,利用分布式数据采集并实时诊断,结合数据融合和冲突消解算法,最终得出相对合理的诊断结果,较好的解决了复杂电子设备故障诊断难的问题。     

舰用电子设备结构可靠性模糊综合评估研究

雷达等军用电子设备的可靠性,主要取决于电信功能的稳定性和结构的可靠性。文章根据军用电子设备结构系统失效模式的多样性、相关性、不同程度性及其失效过程的模糊性等特点提出了结构可靠性的模糊综合评估方法,给出了具体的综合评估数学模型和公式,并以某舰用电子设备结构系统为例说明了该方法的应用过程。     

声纳罩软连接技术

安装于艇体首部的大型声纳罩线型变化大,软连接周界长,结构复杂,技术要求高.文章介绍了合理的软连接结构设计,以及先进的制造、安装技术,使装艇声纳罩的软连接满足使用要求,综合技术性能得到提高.     

水面舰艇上层建筑和桅杆射频综合集成的思考

介绍了水面舰艇射频电子设备的发展情况和国外水面舰艇射频集成、上层建筑(桅杆)射频综合集成情况。指出射频集成和上层建筑(桅杆)射频综合集成是电子、电磁兼容、舰船设计、结构、材料等各学科交叉的系统工程研制项目,应由舰船设计部门与电子设备研制部门大力协同而有步骤地进行。射频集成工作由电子设备研制机构进行。舰船总体研制单位自始至终负责射频集成和上层建筑(桅杆)射频综合集成工作,必须设计制造上层建筑(桅杆)射频综合集成大型模型,进行上层建筑(桅杆)射频综合集成的陆上试验,验证集成射频电子设备性能以及上层建筑(桅杆)射频综合集成后的隐身性和电磁兼容性能;试验成功后装舰。     

舰载电子设备电磁兼容性分析

针对舰载电子设备的电磁兼容问题，采用了一种综合分析的方法，通过综合考虑发射接收对之间的响应，利用接收机、发射机等的数学模型，实例分析了某两部电子设备之间的兼容性，对分析预测电子设备间的电磁兼容性具有一定的意义。     

装备电子设备防腐蚀技术研究

文章分析了大气环境、自然条件等因素对电子设备腐蚀的影响,概述了电子设备大气腐蚀机理和主要腐蚀类型,针对性地提出了电子设备在设计、生产与使用过程中的防腐蚀方法、工艺等技术措施,同时指出了在电子设备贮存、未使用状态下改善环境因素、及时定期进行防腐蚀保养的方法与要求.     

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。