船舶电力系统状态评估方法研究

提出一种基于故障诊断的船舶电力系统状态评估方法,将故障模式及影响分析和3σ统计原理应用到系统状态评估中,建立了从监测参数到故障诊断,从而得到即时状态的评估模型,并对船舶电力系统的实际运行状态做出了评估,计算结果表明,模型评估过程简单、清晰,评估结论准确、有效,     

船舶电办系统状态评估方法研究

提出一种基于故障诊断的船舶电力系统状态评估方法，将故障模式及影响分析和3σ统计原理应用到系统状态评估中，建立了从监测参数到故障诊断，从而得到即时状态的评估模型，并对船舶电力系统的实际运行状态做出了评估．计算结果表明，模型评估过程简单、清晰，评估结论准确、有效．     

基于航行数据的船舶航行油耗模型建立方法

准确评估船舶的能效表现是研究船舶性能、优化船舶能效的基础。为准确评估船舶航行状态对船舶航行油耗的影响和船舶的能效表现,以某超大型散货船为研究对象,基于船舶智能能效综合管理系统获取大量船舶航行数据,通过数据处理和特征工程找出影响船舶航行油耗的因素,采用人工神经网络建立船舶航行油耗模型。采用该模型预估船舶在一段航程中的总油耗量,验证该模型在评估船舶航行状态对船舶航行油耗的影响方面的有效性。此外,采用该模型对航程和转速进行优化,验证该模型对能效优化的可行性。     

船舶电网系统状态评估研究

常规电网系统状态评估方法能够对路基300 MW以下的电网系统状态做出正确评估,但针对船舶电网系统状态评估时,存在评估运行可靠性较低的问题,为此提出船舶电网系统状态评估研究。搭建状态评估模型框架,导入状态评估算法,完成船舶电网系统状态评估模型的构建;确定船舶电网系统状态监测区间,并对监测参数数据进行处理,实现船舶电网系统状态评估研究。试验数据表明,提出的船舶电网系统状态评估方法较常规电网系统状态评估方法,评估运行可靠性提升37.89%,适合对船舶电网的系统状态评估。     

支持向量机在船舶电力推进系统故障诊断中的应用

针对人工神经网络收敛速度慢、容易陷入局部最优解等不足,本文采用支持向量机技术建立船舶电力推进故障诊断系统。确定支持向量机的核函数和分类方法,结合训练样本,采用基于网格搜索的K重交叉验证法进行核函数的参数优化,从而得到支持向量机故障诊断模型。利用支持向量机工具箱函数,在MATLAB中进行故障诊断模型的仿真计算,结果表明基于支持向量机所建立的故障诊断模型有较强的诊断准确性和泛化推广能力,从而提高船舶的安全性。     

基于粒子群算法的船舶电网系统状态评估分析仿真

电网系统状态评估是保证船舶正常工作的关键技术,针对当前船舶电网系统状态评估结果不科学,评估误差大的缺陷,提出基于粒子群算法的船舶电网系统状态评估模型。首先分析当前船舶电网系统状态评估现状,并建立船舶电网系统状态评估的数学模型,然后引入粒子群算法对数学模型进行求解,找到船舶电网系统状态评估的最佳方案,最后在Matlab 2016平台进行了船舶电网系统状态评估的验证测试,本文模型可以快速、有效的找到船舶电网系统状态评估最优方案,提高了船舶电网系统状态评估精度。     

支持向量机网络在船舶电力推进系统状态评估中的研究

船舶电力推进系统状态评估是状态检修的前提和基础,建立合适的舰船电力推进系统状态评估流程与模型,并开发出可行的评估系统是舰船状态评估的必须步骤。本文在对船舶电力推进系统的状态评估方法进行概述和分类的基础上,提出船舶电力推进系统状态评估流程、基于支持向量机网络的船舶电力推进系统状态评估模型和具体的评估步骤。     

模糊神经网络在船舶电力推进系统状态评估中的应用

船舶电力推进系统状态评估是状态检修的前提和基础,建立科学、全面、合理的评估指标体系,选择合适的评估方法,并最终开发切实可行的状态评估系统是船舶电力推进系统状态评估的必要步骤。提出船舶电力推进系统状态评估的流程、基于模糊神经网络的船舶电力推进系统状态评估模型和具体评估步骤,结合船舶电力推进系统的实船运行数据进行状态评估模型仿真试验。仿真试验结果表明,模糊神经网络方法应用于船舶电力推进系统的状态评估具有一定的准确性。     

船舶修造企业安全生产标准化管理系统设计

在对船舶修造中的危险源进行了系统分析的基础上,通过对船舶修造企业安全生产中的危险源辨识、危险因素评价和危险控制,以ASP．NET为开发工具,通过模块化设计,开发了船舶修造企业安全生产标准化评估软件,使用户在软件的指导下,确定各项评估所需参数,简化了船舶修造企业安全生产标准化评估过程避免了因人为取值偏差、计算错误等外在因素导致的评估结果的系统偏差。系统能够快速、准确、高效的对所评估项目需要的各项指标进行计算分析,并自动生成完整的评估报表。确定可能存在的危险因素,并对其危险状态进行等级划分和安全评估,然后再根据不同的危险评估结果采取相应的预防措施进行控制．从而可以有效地预防、减少和控制事故的发生。     

船舶状态综合评估模型的建立

随着经济全球化进程的加速.海运在国际贸易的地位日益重要,船舶安全管理成为关注的焦点.为加大船舶管理力度,提升对船舶安全工作的控制力,准确掌握船舶技术状态与航行安全.实施船舶状态综合评估.针对船舶状态综合评估的传统方法的主观性与单一性,考虑到船舶评估的复杂性.采用层次分析法与模糊综合评价法相结合的方法来建立船舶状态层次模糊综合评估模型.使船舶状态综合评估的结果更为科学、客观,并结合实例_进行阐述.     

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。