相继增压柴油机准稳态建模及仿真研究

介绍了基于增压柴油机各个部分的稳态特性、基本的动力学和热力学方程、稳态试验数据和经验公式的相继增压柴油机准稳态数学模型的建立方法。文中，依次介绍了柴油机各个部件的模型：调速器模型、柴油机本体模型、压气机模型、涡轮模型和增压器本体模型、中冷器模型，并将它们综合成柴油机整体模型，即相继增压柴油机准稳态模型，并利用柴油机的试验数据，对该数学模型进行了校验。     

舰船柴油机的模块化建模与仿真

在柴燃联合动力装置半物理仿真平台的研究中，要求建立的柴油机模型能够较准确地反映瞬态过程中各主要参数的变化，满足进行实时仿真对模型的要求，同时具有通用性，以提高仿真模型的重复利用率。使用容积法建立涡轮增压柴油机模型，可以避免准稳态法中流量和压力关系的迭代计算，同时对计算量的要求又在合理的范围内。在大型系统仿真软件Easy5的支持下，采用了模块化的建模和仿真方法，利用已建立的舰船柴油机的模块库，可以连接组合模块建立各种配置的舰船柴油机模型。作为应用实例，建立了相继增压柴油机模型，并进行动态仿真。     

柴油机动态调速过程的仿真分析

以6L80MC柴油机和DGS-8800电子调速器为对象，建立了柴油机传递函数模型和调速器模型。采用Fortran和Minis5．0仿真软件的混合编程，对柴油机动态调速过程进行了仿真计算，分别讨论了不同比例放大系数、不同积分时间常数和不同微分时间常数对柴油机调速过程的影响。仿真结果表明本文提出的柴油机模型和电子调速器模型对船舶主机的仿真建模过程有重要意义，计算结果对船舶主机的仿真计算具有一定的参考价值。     

电站柴油机电子调速系统模糊控制的研究

本文探讨了电站柴油机调速系统的模糊控制方法，进行了模糊系统的设计和实验研究。研究结果表明：模糊控制方法对电站柴油机电子调速系统是适用的，它的鲁棒性好；在模型参数有变化时，其控制效果优于传统的ＰＩＤ控制。     

基于神经网络对电控柴油机运行特性影响因素仿真研究

基于AVL-BOOST软件仿真平台建立某船用四缸柴油机仿真模型,标定后的模型进行柴油机全工况仿真计算。仿真出来的3 200组数据作为人工神经网络输入数据,采用贝叶斯统计方法对网络进行训练建立2层的反馈神经网络仿真模型。并分别通过实验、AVL-BOOST和神经网络数据曲线的对比分析,验证人工神经网络预测的准确性。利用验证好的人工神经网络模型预测进排气压力对柴油机转矩的影响,以及预测压缩比和供油定时对柴油机排放性能和动力性能的影响,最后利用扰动法分析不同工况下柴油机各个参数对柴油机性能的影响程度。     

基于神经网络对电控柴油机运行特性影响因素仿真研究

基于AVL-BOOST软件仿真平台建立某船用四缸柴油机仿真模型,标定后的模型进行柴油机全工况仿真计算.仿真出来的3 200组数据作为人工神经网络输入数据,采用贝叶斯统计方法对网络进行训练建立2层的反馈神经网络仿真模型.并分别通过实验、AVL-BOOST和神经网络数据曲线的对比分析,验证人工神经网络预测的准确性.利用验证好的人工神经网络模型预测进排气压力对柴油机转矩的影响,以及预测压缩比和供油定时对柴油机排放性能和动力性能的影响,最后利用扰动法分析不同工况下柴油机各个参数对柴油机性能的影响程度.     

船用中小缸径直喷式柴油机燃烧室中油线网分布的计算

直喷式柴油机燃油喷射所构成的油线在燃烧室中的落点分布，对燃烧系统性能影响极大。本文针对船用中小缸径直喷式柴油机的结构特点，介绍了燃烧室中油线网布置的一般原则和具体方法，建立了油线网的计算模型。由此，即可通过计算机对燃烧室与喷油系统匹配实现辅助设计。     

船舶主柴油机转速直接数字控制系统

本文应用微机控制系统的数字直接设计原理，在求得船用主柴油机Ｚ传递函数模型基础上，设计了主柴油机转速直接控制系统，得出了ＤＤＣ系统控制器的Ｚ传递函数和微机实现的递推算法。对某船主柴油机和推进器形成ＤＤＣ仿真系统，进行仿真运行 。     

基于遗传算法的船舶柴油机转速控制系统仿真研究

以12E390V柴油机为对象，建立了柴油机简化传递函数和执行器模型。控制方法采用PID控制，并利用遗传算法优化控制器参数，对柴油机动态调速过程进行了仿真分析，并分别和Z-N(Ziegler Nichols)法、ISTE最优设定法这2种参数整定方法做了比较。结果表明遗传算法的性能远优于其它2种参数整定法。     

8300C型柴油机节能型喷油泵的研制

以柴油机工作过程的数学模拟为基础。建立了优化柴油机工作过程的单目标函数的非线性规划的教学模型，并利用序贯加权因子（ＳＷＩＦＴ）法进行了优化计算，利用双韦别（Ｖｉｂｅ）函数模拟放热规律，分析了放热规律各参数对柴油机工作过程的影响。按推进特性对８３００Ｃ型柴油机节能喷油泵进行了优化设计，模拟结果证实，按此方法设计出的节能型喷油泵在常用负荷下可节油１．５－２．５％。     

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。