一种优化的AIS与VTS融合算法

针对船舶交通管理系统(Vessel Traffic Service, VTS)与船舶自动识别系统(Automatic Identification System, AIS)融合之后存在的特定场景下的数据精度较差、信息推断能力不足和与海事业务系统脱节等问题,提出一种能有效融合AIS、VTS和海事业务信息的算法,实现“海事监管“一船全景”。对AIS与VTS融合之后所得船舶航迹与海事业务数据进行有效关联,得到船舶海事业务全景数据,包括雷达信号、AIS信号、海事行政处罚和国内安检等。实际应用结果表明,该算法能在生产系统上稳定运行,在数据准确性和及时性方面相比以往有很大提升,能为海事交管中心值班人员提供有力支持,为智慧海事提供有力支撑。     

VTS与AIS联合船舶物联网信息融合关键技术

随着船舶物联网技术的广泛应用,为船舶管控、状态监测、环境探测等提供了新的模式。船舶物联网的基础是AIS和VTS系统,单一系统的采集信息无法全面分析船舶运行状态,同时,多个系统的采集信息存在冗余相关,如何实现信息的有效融合,成为船舶物联网技术发展的关键。本文设计分布式船舶物联网信息融合模型,提出以灰色理论为基础的航迹关联模型和以Kalman滤波算法为基础的航迹融合模型,有效提高AIS和VTS系统间信息融合的效率和准确性,以及系统的可靠性和生存能力。     

小型船舶和渔船配备AIS刻不容缓

AIS是运用了先进的船舶导航技术、数字通信技术和网络信息技术,用于水上交通联络和指挥的岸—船、船一岸,以及船一船之间的通讯、导航,是在船舶之间和船岸之间自动进行航行通信、建立船舶信息交换和船舶识别的系统。它能够自动发射、接收和处理装有AIS的船舶的自身静态数据和动态航行信息,使船舶相距对遇船或岸台很远时,即能自动、连续向它船或岸基VTS（船舶交通管理中心）提供该船的实时船位、速度、航向等与船舶航行或与交通管理相关的信息,并接收它船及VTS提供的助航服务信息,从而在很大程度上有利于船舶的航行安全。     

VDES对VTS服务影响初探

VDES系统除了保留了AIS的功能以外,还增加了ASM和DES功能,VDES系统能够提供远多于AIS系统的数据信息,并能实现船-岸之间的数据通信。从VTS的角度来说,VTS中心获取的信息以及与船舶沟通的方式都将发生很大的改变,本文就针对VDES系统对VTS对船舶提供服务方面可能产生的作用进行初步探讨和分析。     

AIS-Ⅱ系统在船舶安全监管中的应用

目前,在船舶监管领域,AIS系统和GPS公网监控系统作为VTS系统中的辅助系统,相互共存并发挥着重大作用。与VTS系统相比,它们能够准确确定监管船舶的各种动态信息和静态信息,而不需要人为进行呼叫就能够自动识别。其中AIS系统中,classA主要应用于IMO公约规定的大于300总吨以上的船舶,AIS classB和GPS公网监控系统则应用于小型内河或沿海船舶。     

我国船舶自动识别系统（AIS）岸台建设概况

中国是SOLAS公约的缔约国，为履行国际义务和保证在我国海域航行的中外船舶的航行安全，中国海事AIS建设是十分必要和紧迫的。AIS建设的社会效益是避免船舶碰撞减少生命和财产损失，解决好船岸信息传输这个重大难题，实施船岸信息联网、船舶信息共享，推动交通运输信息化工程，使中国航运事业与国际社会密切相联系，使中国海事管理水平上一新台阶。     

船联网信息融合关键技术研究

由于电子设备类型不同,基于物联网结构的数据传输与处理存在大量异构数据,船舶各电子设备之间﹑船与船之间的数据交互需要通过中间件进行数据融合及接口统一。基于船联网的信息融合需要提供一个完整的策略方法及框架来处理船联网中的异构系统数据。本文研究现有基于物联网结构的信息融合技术,针对船舶电子系统特征,提出一种高效特征信息融合算法,有效提高异构数据融合效率。     

AIS对VTS的影响分析

介绍船舶自动识别系统(AIS)的技术性能,探讨目前船舶交通服务(VTS)存在的缺陷,叙述了AIS技术在VTS中的应用以及AIS对VTS的重大影响。     

舰船交通管理系统信息融合系统中的云计算应用

互联网技术和计算机技术的迅速发展,使大数据和云计算平台逐渐成熟,并应用于多种工业控制和通信领域中。舰船交通管理系统(VTS)可以有效提高船舶航行效率,改善航运交通,但传统的VTS存在精度低、数据处理能力差等缺点。本文针对舰船交通管理系统的信息融合系统进行研究,并基于云计算技术和AIS技术开发了一种新型的VTS信息融合系统。仿真试验表明,基于云计算的VTS信息融合系统不仅雷达信号处理能力强,而且可以进行多任务并行工作,有效改善了VTS的效率。     

天津港复式航道智能管控一体化研究及效益分析

复式航道智能管控一体化的管理模式开发、拓展、融合船舶动态风险管理系统、船舶航行计划智能编排推演系统、VTS监控系统、VTS信息智能分发系统、船舶交通组织模式应用、VTS信息管理子系统等功能,整合了VTS管理服务、VTS用户需求及船岸数据交互流程,实现了交通组织、航行计划编排、风险管控和信息交互的功能结合和数据共享,成果显著提升了VTS监管效能,产生明显的安全效益、经济效益和社会效益,应用前景广阔。     

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。