一种舰载分布式构件系统的容错机制

针对舰载作战指挥系统的容错功能需求,分析了当前基于检查点的后向恢复机制中信息存储存在的问题。提出了一种舰载分布式构件系统的容错机制,给出了容错模块的组成、后向恢复机制和具体实现方案,并通过实验验证了实现方案的可行性。     

综合显控台的一种容错设计

本文描述了一个综合显控台的容错系统。整个系统采用双机备份工作方式，对显控台关键的软件模块采用具有检测功能的两版本编程技术进行错误屏蔽，采用监视计数器技术防止软件模块的死锁，整个系统具有自检测功能，可以实现故障的自动恢复。     

一种分布式实时支撑平台的研究与实现

针对一种建立在高可靠、高性能结点和双冗余通信网络上的实时容错分布式系统，将运行在实时应用程序和系统硬件平台之间的分布式实时支撑平台作为研究系统实时性的重点，从其实现的难点出发，分析了分布式实时支撑平台的技术路线、可预测性机制和具体实现方案，并扩展了该平台对于实时容错任务的调度支持。     

基于马尔可夫模型的容错系统可靠性分析

容错系统的可靠性分析是容错系统设计过程中最重要的步骤之一。在容错控制系统的可靠性分析中，利用马尔可夫过程和半马尔可夫过程理论对容错系统进行可靠性建模能够较为真实地描述系统的实际工作情况。但是，由于容错系统为了达到高可靠性而采用了大量的冗余配置及重构技术，使得该可靠性模型往往变得相当复杂。因此，对系统可靠性模型进行必要的化筒，可以减少许多计算量并使该模型更回答符合实际使用要求。     

一种容错服务器的同步机制

随着计算机网络的迅速发展，具有高可靠、高可用的容错计算机在当前各行业需求紧迫。概述容错服务器系统的同步机制，重点分析一种基于任务复制容错机体系结构和应用于其上容错同步算法的具体实现过程。讨论项目中21555非透明桥的应用。     

舰船计算机测控系统中的软件冗余方法研究

简要介绍了在舰船计算机测控系统中的软件冗余设计.在设计中采用智能故障诊断和容错技术的设计线路、技术途径、技术方法及避错、容错软件编写的一些原则.主要研究了恢复块及多版本程序设计2种常用的软件冗余设计方法,并就其在分布式系统中应用存在的问题进行简要的分析,提出了软件冗余设计的实际应用,并给出其具体改进方案的设计.     

双线性系统执行器故障情形容错设计

双线性系统容错控制的主要问题在于处理模型中的非线性项与多模型同时镇定。本文通过在各控制通道嵌入适当的增益，结合Riccati方程中加权矩阵Q和R的适当选取，并考虑系统的状态可达集，设计了一种简单易行的线性状态反馈方法，实现了双线性系统的容错控制。最后，通过仿真结果证明了方法的有效性。     

基于QNX的舰艇中央控制台软件构架设计

从现代舰艇分布式控制系统入手,在对控制系统的结构与网络连接方式进行分析的基础上,对基于QNX操作系统中央控制台软件的任务管理器、系统控制器的核心部分的功能、工作方式和工作过程进行了阐述,对容错技术的实现进行了设计,提出了由回答驱动的消息传递方式工作的软件构架、基于硬件和软件的故障监测与恢复方法,对中央控制台软件构架的设计具有参考价值。     

一种高可用容错服务器的设计

本文介绍了一种与通用网络服务器兼容的容错网络服务器系统的设计,重点描述了系统结构及其配置,基于硬件容错原理的实现机理和过程以及该系统的可用性评估。     

船用分布式单片机自动容错控制系统

为解决传统船用分布式单片机控制系统存在抗干扰能力较低的不足,提出船用分布式单片机自动容错控制系统设计,基于船用分布式单片机自动容错控制系统结构设计,以及系统外部连接的设计,实现了控制系统的硬件设计;依托自动容错控制系统容错算法设计、程序设计,完成了船用分布式单片机自动容错控制系统的软件设计,实现了提出的系统设计,实验数据表明,运行提出的分布式单片机自动容错控制系统较传统控制系统,抗干扰能力提升11.74%,适合于自动控制集成性高的船舶使用。     

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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33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 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;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

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。     

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.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

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）.     

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.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。