CPLD在教学实验中的应用

介绍了以Ultra37000CPLD芯片的优越性能,论述了CPLD实现的功能,并着重描述了CPLD与其周边元件的连接方法。最后以CPLD作为核心控制器件设计了一种用于教学实验的开发板,并通过VHDL语言实现了电路控制。     

复杂可编程逻辑器件(CPLD)在船舶随动舵设计中的应用

利用CPLD对船舶随动舵进行了模拟设计和仿真实验,介绍了利用CPLD实现复杂逻辑功能的具体方法.     

PID自动舵组件自动测试系统研究

本文介绍了PID自动舵组件自动测试系统的技术实现.该系统运用了现代技术设计理念,采用触摸屏、PLC及CPLD,实现了PID自动舵组件的自动测试、故障诊断以及测试波形和结果的显示.     

船舶综合模拟器控制系统的设计研究

介绍了采用CPLD技术开发船舶综合模拟器控制系统的设计思想和主要技术，包括了船舶操纵模拟器、航海仪器模拟器、轮机模拟器的硬件设计以及软件设计。[编者按]     

基于CompactPCI总线的数据采集控制卡

介绍了基于CompactPCI总线的数据采集卡的硬件组成和设计方法,重点介绍了桥接芯片PCI9030对PCI和Local bus间进行配置和操作,并使用CPLD实现逻辑功能完成数据采集和信号控制.     

基于CPCI总线的GMSK调制系统研究

介绍一种基于CPCI总线的GMSK调制系统,采用了DSP结合CPLD的方式构建的系统平台,对系统的结构和功能及硬件,软件设计进行了详细的介绍,并对主要器件的一些特点做了简单的描述。     

嵌入式技术和CPLD技术在LED显示屏设计中的实现

目前,大部分LED显示屏采用的是8位或准16位的微控制器,很难实现在信息容量和处理速度上要求很高的动态特技显示和灰度显示。为解决上述问题,我们采用了嵌入式技术、CPLD技术和三星公司的ARMS3C4510B微处理器;对基于S3C4510B的系统进行了网络接口扩展设计,设计了l0M/100M以太网接口电路,为以太网提供了接入通道;利用VHDL开发了复杂可编程逻辑器件CPLD,完成LED显示板的时序功能,实现了对显示屏的灰度控制。     

基于CPLD的固态功率放大器的保护电路设计

介绍了一种基于CPLD的固态功率放大器的保护电路设计。该电路设计方案具有开发快、抗干扰能力强、响应速度快和可靠性高等优点。仿真和实验结果验证了此设计的合理性。     

基于CPLD的VGA接口控制器设计

VGA是一种标准的显示接口,随着嵌入式系统的迅速发展,对实时图像处理显示有了更多的需求。本文介绍了一种基于CPLD的VGA控制器的设计过程,并对设计结果进行了仿真。     

基于CPLD的止动器控制板设计

本文介绍了一种基于CPLD止动器控制板的设计方法。采用ALTERA公司的EPM1270作为控制核心,接收上位机的指令,控制八个步进电机止动器运行,电路简单可靠。     

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。