复杂可修系统可靠性维修性仿真研究

对于大型复杂可修系统,常规的解析法已经难以得到想要的结果,本文研究用基于故障树最小割集和维修的数学仿真模型来对系统的可靠性和维修性进行分析计算,结果表明仿真合理,对系统可靠性估计和维修决策有一定的指导价值。     

复杂系统可靠性分配计算方法及其在ROV推进系统中的应用

针对ROV推进系统可靠性分配过程出现的可靠性模型复杂,且缺乏历史故障数据而导致无法直接利用现有常规分配方法开展工作的问题,基于评分分配法和比例组合思想提出一种新的可靠性分配计算方法,解决了评分分配法无法用于复杂串并联系统及表决系统的难题。以含有复杂串并联系统及表决系统的推进系统可靠性模型计算为例,进行推进系统的可靠性分配工作,计算得到推进系统各组成设备的可靠度分配值,实现了所提出的可靠性分配计算方法的应用。     

基于机会约束规划的可靠性优化分配理论研究及应用

提出了一种基于风险管理的系统可靠性优化分配方法.决策者可以根据自己对风险的偏好程度,合理地分配系统各部分的可靠性指标并在系统性能与风险之间取得某种平衡,以使系统的总效用达到期望的最优水平.建立了基于机会约束规划理论的数学模型,对这一方法进行了合理的描述,并用蒙特卡罗仿真法求出了模型的最优解.文中用算例作了说明.     

网络可靠性试验与评价技术研究

针对网络系统自身的复杂性、动态性、分布性及任务的时变性等特点,面向装备复杂网络的可靠性验证与评价需要,分析网络系统可靠性参数,提出了基于网络分层的任务可靠性参数体系;研究网络可靠性试验剖面确定方法,明确了任务剖面、环境剖面和试验剖面的生产方法;提出网络可靠性试验流程,形成了网络可靠性试验方案制订方法、试验结果分析与任务可靠性评价方法,为网络可靠性试验单位提供了具体的技术和方法支持.     

基于可靠性舰船系统冗余优化计算

在舰船系统设计中采用冗余措施可以有效地提高系统的任务可靠性,但同时也增加了系统的复杂性。本文提出的资源耗费最少条件下系统可靠性最大计算、约定资源耗费条件下系统可靠性最大计算的办法,可以合理地配置冗余单元使系统可靠性达到最大。通过对全船液压系统的计算,验证了在舰船系统设计中采用这两种计算方法,可以得到较好的可靠性指标并降低系统的复杂性。     

船舶机电系统可靠性评估方法研究

本文在总结船舶机电系统可靠性评估特点的基础上,分析了现有评估方法运用于船舶机电系统的不足,结合故障树通用模型,提出了基于相当故障树模型的系统可靠性综合评估方法。该方法先利用相当故障树模型简化系统层次,然后结合经典法计算,较好地解决了对船舶大型小子样复杂系统进行可靠性评估的问题。     

S—ARPA可靠性预计及分析

本文阐明了对船用避碰雷达装置进行可靠性预计的必要性;並就国内首创的S—ARPA的研制工作采用元器件应力分析法进行了可靠性预计和分析;提出了对失效率高、可靠性差的发光显示器件采用並联冗余技术及控制动态显示等方式来降低单元失效率,从而对提高系统可靠性的问题提出了看法。最后,就对元器件采用降额设计的方法以提高设备可靠性的途径作了进一步的探讨。     

复杂系统可靠性验证方法研究磁

针对复杂系统可靠性验证问题,根据组成系统设备的研制特点,给出了复杂系统可靠性的Bayes综合评估方法,以此获得了其任务可靠度点估计和置信下限。在此基础上,对复杂系统可靠性验证试验方案的制定方法进行了研究,通过综合考虑生产方和使用方的风险,给出复杂系统可靠性保证试验方案的调整方法。最后,通过实例分析,对方法的可行性进行了说明。     

浅谈复杂系统的可靠性模型

由于当前在复杂系统可靠性建模中把问题弄得太复杂了，以致于无法建立复杂系统的正确的可靠性模型，或者，建立了多个复杂的可靠性模型而无法进行可靠性设计。经论证，本文提出了复杂系统可靠性建模的基本原则，即复杂系统的一个可靠性指挥只对应一个典型的代表性的可靠性模型。经过计算，误差在允许范围内的简化，将使复杂系统的可靠性模型变得很简单。     

船舶电气系统保护单元可靠性预计的修正方法

针对船舶电气系统保护单元的特点,提出对船舶电气系统保护单元进行可靠性预计研究,采用元器件的误动失效率代替元器件的通用失效率,即采用误动系数法修正传统元器件计数法的通用数学模型,提高系统可靠性预计的可信度。以船舶电站欠压保护单元的可靠性预计研究作为算例,计算出两种该欠压保护单元失效率的预计结果。研究结果表明:采用误动系数法,保护单元失效率仅为传统方法失效率预计结果的27.5%,基于误动系数法的保护单元可靠性预计是对传统元器件计数法的合理修正,对深入研究船舶电气系统可靠性建模工作提供更加有力的支撑。     

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。     

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）.     

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。     

Catalyzing Coastal Management in Kenya and Zanzibar: Building Capacity and Commitment

Site-based projects were initiated in Chawka Bay-Paje, Zanzibar, and Nyali-Bamburi-Shanzu, Kenya, to demonstrate the benefits of an integrated coastal management (ICM) approach for addressing coastal issues such as tourism development and enhancement of resource-dependent village economies in eastern Africa. A two-year, multidonor project used three primary strategies to make rapid, but sustainable, progress toward ICM. These included using interagency government teams for ICM planning, adopting an internationally recognized framework for ICM as a project ''road map,'' and explicitly incorporating capacity-building strategies into all aspects of the project. Within two years, integrated ICM action strategies, prepared through participatory processes, were being implemented at both sites, and both teams were working to expand the scale and scope of ICM in their nation. More importantly, the project helped create committed, capable, interagency groups that continue to work together to address urgent ICM issues.