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。     

船舶自动识别系统(AIS)介绍

介绍了船舶自动识别系统AIS的概念和功能,说明了AIS与雷达监控同屏的可行性,强调了AIS实施以后对现有VTS、船舶航行及避碰、助航标志及信息的影响,提出了内河实施AIS尚需解决的问题。     

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.     

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.     

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.     

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.     

舰艇反鱼雷技术

对目前舰艇反鱼雷技术中的非杀伤、软杀伤和硬杀伤等比较先进的手段进行了阐述,并在此基础上分析研究了舰艇反鱼雷技术的发展趋势。     

A simplified method for reliability- and integrity-based design of engineering systems and its application to offshore mooring systems

This paper presents a simplified method for the reliability- and the integrity-based optimal design of engineering systems and its application to offshore mooring systems. The design of structural systems is transitioning from the conventional methods, which are based on factors of safety, to more advanced methods, which require calculation of the failure probability of the designed system for each project. Using factors of safety to account for the uncertainties in the capacity (strength) or demands can lead to systems with different reliabilities. This is because the number and arrangement of components in each system and the correlation of their responses could be different, which could affect the system reliability. The generic factors of safety that are specified at the component level do not account for such differences. Still, using factors of safety, as a measure of system safety, is preferred by many engineers because of the simplicity in their application. The aim of this paper is to provide a simplified method for design of engineering systems that directly involves the system annual failure probability as a measure of system safety, concerning system strength limit state. In this method, using results of conventional deterministic analysis, the optimality factors for an integrity-based optimal design are used instead of generic safety factors to assure the system safety. The optimality factors, which estimate the necessary change in average component capacities, are computed especially for each component and a target system annual probability of system failure using regression models that estimate the effect of short and long term extreme events on structural response. Because in practice, it is convenient to use the return period as a measure to quantify the likelihood of extreme events, the regression model in this paper is a relationship between the component demands and the annual probability density function corresponding to every return period. This method accounts for the uncertainties in the environmental loads and structural capacities, and identifies the target mean capacity of each component for maximizing its integrity and meeting the reliability requirement. In addition, because various failure modes in a structural system can lead to different consequences (including damage costs), a method is introduced to compute optimality factors for designated failure modes. By calculating the probability of system failure, this method can be used for risk-based decision-making that considers the failure costs and consequences. The proposed method can also be used on existing structures to identify the riskiest components as part of inspection and improvement planning. The proposed method is discussed and illustrated considering offshore mooring systems. However, the method is general and applicable also to other engineering systems. In the case study of this paper, the method is first used to quantify the reliability of a mooring system, then this design is revised to meet the DNV recommended annual probability of failure and for maximizing system integrity as well as for a designated failure mode in which the anchor chains are the first components to fail in the system.     

Community-Based Management for Sustainable Fisheries Resources in Phang-nga Bay,Thailand

Fishing communities, the Government of Thailand Department of Fisheries, local nongovermnental organizations, universities, the Food and Agriculture Organization of the United Nations (FAO), and FAO's Bay of Bengal Program have undertaken a partnership in management of Phang-nga Bay's coastal resources. It is the first project of its kind in Thailand, and although still in the early stages, offers insights that may contribute to our knowledge of how we can improve our management of coastal resources, including the importance of (1) building relationships within the governance process; (2) combining education, enforcement, and economic incentives to achieve compliance; (3) implementing solutions early; and (4) government support of community-based decisions. These insights reinforce trends emerging in other coastal management projects in the Asian region.     

含裂纹钢板复合材料修补强度和刚度数值分析

用ANSYS有限元分析软件对复合材料补片修复含边裂纹和中心裂纹钢板的强度和刚度进行了数值分析.引入相对刚度的概念,研究了钻有止裂孔裂纹的长度对损伤钢板相对刚度的影响,分析了损伤钢板刚度复合材料贴片修补效果;引入屈服载荷提高率的概念,分析了损伤钢板强度的修复效果.     

混凝土道路、堆场面层裂缝的产生与防治

从混凝土道路、堆场的各个结构层分析裂缝产生的原因,并针对性地说明预防措施,阐述裂缝维修方法。     

单相PWM整流器的建模与仿真分析

文章详细分析了单相VSR型PWM整流器的整流原理,建立了电流内环,电压外环的单相VSR型PWM整流控制器的数学模型和逻辑框图。在MATLAB／Simulink软件环境中进行了仿真,分析了模型的可行性。