横向传送货物

本发明叙述了一种横向传送货物的系统,它主要是用来在海上两船之间传送货物。通常所采用的横向貨物传送系统是由高架索和传送吊车组成,貨物通过传送吊车悬掛在高架索上,传送吊车的一端与外牵索连接,而另一端与內牵索连接。由一个人控制几台绞车,     

伸缩型接收装置

本发明概要地叙述海上补给的操作,特別是述及在补给操作时自一个站向另一个站传送物体的接收装置。在隔开的二个站(例如二艘航行着的船)之间,传送物体的一个方法是在两船间装上內牵索和外牵索,同时设有一根保持足够拉力供传送吊车运行的张力索,吊车载着物体自一艘船移向另一艘船。通常,张力索被称作高架索,它的拉力由装在供应船或发送船上的一台绞车和其他有关机构控制。內、外牵索各有一端固紧在传送吊车上,另一端固紧并捲在任一艘或     

垂直往复的接收装置

本发明概要地叙述了在海上补给操作时具体的传送和装卸装置,特別述及到自一艘航行补给船向另一艘船传送物体时的接收装置。海上补给操作乃是一艘发送船或供应船将貨物或物体(如貨物、弹药、导弹等)传送到通常为小型的战斗接收船上。操作是靠在二艘船舶间收紧之吊索来实现的。通常采用的一种索具称为张力高架索具,此索具的一根所谓高架索连接两艘船并支撑着一台传送吊车。也采用外牵索和內牵索,这些索有一端固定在传送吊车上,以便将传送吊车自一艘船     

长平台牵索挂篮的总体设计与应用

挂篮是悬浇混凝土结构常用的施工设备,丹阳市北二环大桥抢修工程其主梁为分离式悬浇箱梁结构,在同类型桥梁结构中,桥面宽度和一次浇筑的混凝土量均较大。为解决箱梁悬浇的问题,经比较决定采用长平台牵索挂篮进行施工。介绍了该工程挂篮的选型及长平台牵索挂篮的设计要点,包括挂篮的平面布置,结构受力分析及结构设计,同时结合工程实际介绍了长平台牵索挂篮的施工工艺流程及施工注意事项。施工监控结果显示,主梁线形及应力均满足设计要求,节段工期从15 d缩短到10 d。     

牵索锚固式海上风机基础结构设计与分析

海上风电开发中随着水深增加,传统的固定式风机基础的劣势逐步显现,建造成本也显著增加。本文提出了一种适用水深范围广、结构简单、刚度可调的新型牵索锚固式海上风机基础结构。结合海上风电场设计实践和经验,归纳了牵索锚固式海上风机基础的设计重点。以3MW海上风力发电机组为例,分析不同牵索结构设计参数对基础结构的影响,通过计算发现,索缆根数、夹角对结构位移影响显著,而对应力影响微弱,索缆牵拉位置对结构应力位移影响都很显著。分析牵索锚固式风机基础结构在工作荷载和环境荷载耦合作用下的力学性能,计算结果显示,牵索锚固式海上风机基础结构不会发生强度破坏,但位移可能超过使用限制。     

海上航行横向干货补给装置内、外牵索控制系统研究

内、外牵索控制系统是横向干货补给装置的核心组成部分。本论文介绍了内、外牵索控制系统的组成、功能及工作原理;以内牵索控制系统为例推导了控制系统各个环节的传递函数;应用Matlab-Simulink软件对内牵索控制系统进行了建模与仿真分析。仿真结果表明,采用PID控制后内牵索控制系统各项指标能够满足总体指标的要求。     

海上补给接收装置

本装置一般与海上补给操作有关,特別是属于两船间传送貨物的接收装置。海上补给是一术语,它的含义是在航行的船舶间传送诸如必需品、弹药和其他貨物等供应品。通常,传送索架设在两艘航行的船舶之间,供应品靠一台传送吊车自一艘船运往另一艘船,传送吊车靠內、外牵索的收、放在高架     

宽幅预应力混凝土桥牵索挂篮设计

借鉴国内类似一般宽度桥面工程牵索挂篮的设计经验,以丹阳北二环大桥主桥悬浇施工牵索挂篮为例,对宽幅预应力混凝土桥牵索挂篮结构设计作了深入的研究,通过采用桁架式结构、增设吊点和升降式底模等方法有效降低挂篮的设计重量,提高主梁、横梁的设计刚度,严格控制挂篮变形,提高移篮速度.     

钻井船吊车改造应力测试分析

结合钻井船吊车改造工程进行了应力测试分析 ,得出了吊车在最危险的情况下 ,其基础及支撑结构的应力值 ,通过与有限元法计算结果的对比 ,进一步确认了吊车基础结构满足强度要求     

牵索挂篮在斜拉桥主梁悬臂施工的技术应用

本文结合重庆李渡长江大桥工程斜拉桥主梁挂篮悬浇施工,介绍牵索挂篮的结构特点和具体操作方法,综合说明牵索挂篮在斜拉桥悬浇施工中的技术应用。     

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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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。