基于变异田口算法的阵列天线方向图综合

针对智能优化算法在处理天线阵列综合问题时收敛速度慢、计算次数过多的缺点,引入了田口算法（ Taguchi meth-od, TM）,设计了一种基于变异机制的田口算法（ mutation-based Taguchi method, MTM）。变异田口算法利用变异算子产生参数水平值,同时采用自适应内循环机制,既能多样化搜索空间,又能控制算法迭代次数。仿真结果表明：变异田口算法性能可与粒子群优化算法（ particle swarm optimization, PSO）相比拟,并且计算量大大降低。采用变异田口算法对阵列天线方向图进行了综合设计,能够实现低旁瓣和零陷的目标。     

基于CSSOA的多船智能避碰决策研究

[目的]智能避碰决策作为船舶安全航行的关键技术之一,对智能船舶的发展具有重要意义。针对多船会遇下的智能避碰决策问题,提出一种基于高斯变异和Tent混沌的改进麻雀搜索优化算法（CSSOA）。[方法]算法采用Tent混沌映射初始化麻雀原始种群,提高其多样性,并对适应能力差和搜索停滞的麻雀个体进行混沌映射,利用高斯变异提升局部搜索能力和鲁棒性,改进方案优化启发式算法收敛速度慢和易陷入局部最优的问题。综合考虑船舶间船速比、最小会遇距离、相对距离、最小会遇时间、相对方位等因素,利用模糊隶属度函数建立船舶碰撞风险模型,并通过多船典型会遇场景进行实例验证。[结果]实验结果显示,改进算法的平均迭代次数较粒子群算法和原麻雀算法分别减少了77.97%和53.57%。[结论]改进后的麻雀优化算法能以更优的收敛速度寻到安全经济的避碰路径,为船舶驾驶员提供避碰决策参考。     

基于分段动态松弛协同优化算法的船舶机舱结构优化设计

基于标准的协同优化算法,针对其对初始点敏感、收敛慢等固有缺陷,将协同优化算法法与混合优化算法及动态松弛法相结合,提出分段动态松弛协同优化算法,并将其应用到船舶机舱结构多目标优化问题中。针对船舶主机舱结构静、动态多学科多目标优化问题,建立主机舱结构的多目标协同优化模型。在Isight优化软件中采用改进的分段动态松弛协同优化算法,对船舶机舱结构进行静、动态多学科多目标协同优化设计,得到优化设计的最优解。优化结果表明,相对于基于遗传算法的协同优化算法,分段动态松弛协同优化算法兼顾了优化的高效性和准确性,对于实际工程中更加复杂的多学科多目标结构优化具有一定的参考价值。     

基于改进粒子群算法的蒸汽发生器水位控制优化

核动力装置蒸汽发生器的水位控制系统,多采用串级三冲量PID控制方案.为了克服传统的控制器参数整定方法的局限性,应用粒子群优化算法对主调节器进行参数整定,获得了相对最优参数.仿真结果表明,与传统整定方法相比,这种参数整定方案得到的控制参数能使水位控制系统具有更好的控制品质.     

多目标优化算法在舰船天线布局中的应用

针对现有的单目标优化算法在天线优化布局应用中的不足,提出一种基于多目标粒子群优化(MultiObjective Particle Swarm Optimization,MOPSO)算法的天线优化布局方法。将该算法与数值计算方法相结合,建立多目标、多变量协调控制的复杂平台上的天线优化布局数学模型。在此基础上,使用FEKO软件建立某型战舰的仿真分析模型,具体分析舰载短波通信天线的优化布局过程。     

多目标进化算法在船舶设计中的应用

针对船舶概念设计阶段船型参数优化问题,根据快速性、操纵性、舱容衡准及基于经验公式建立船舶优化数学模型,采用改进的非支配解排序的多目标进化算法（NSGA-Ⅱ）,以推进系统总效率、舰船经验系数、相对回转直径及船舶造价4个参数为优化目标,选取若干设计变量,对50 000 DWT油船进行多目标优化.数值算例表明,改进的非支配解排序的多目标进化算法能够有效、客观地选择合理的船舶主尺度参数.     

基于迭代局部搜索和自适应粒子群优化的SVM短期负荷预测

为了能够进一步的提高船舶电力负荷的预测精度,针对SVM模型在负荷预测中存在的参数选取问题,该研究提出了一种新的参数优化算法:基于迭代局部搜索和自适应粒子群优化的组合算法。自适应粒子群算法提高了传统粒子群算法的收敛速度,引入的迭代局部搜索思想,配合新的极值评价标准能够很好的解决粒子群算法容易陷入局部最优的问题。仿真结果表明,利用新的参数优化算法使得SVM预测模型的精度得到了很大的提高。     

基于模拟退火算法在尺度优化设计方法

详细介绍了神经网络的模拟退火算法法（以下简称ＳＡ）的特点，基本思想及步骤，它是基于ＭｏｎｔｅＣａｒｔｏ迭代精法的一种随机搜索算法，以主尺度优化设计为例，针对主尺度优化问题解的特性和状态，对模拟退火算法是具体应用的几个问题进行了探讨，仿真结果表明，ＳＡ算法能很好的姚离局部最优解的陷阱找到全局最优解，其优化与初始点的选择无关，从而为船舶主尺度优化问题提供了一个稳定的全局最优化算法。     

动力吸振器的多目标优化和多属性决策研究

动力吸振器被广泛用于船舶、飞机和汽车等工业领域。在结构振动控制中,为了最大限度地发挥吸振器的耗能减振作用,需要寻找吸振器的最优参数,即最优频率比、最优阻尼比和最优质量比,使得结构在不同的频率激励下获得最好的减振效果。文章将基于进化算法的多目标优化技术与多属性决策方法联合运用,针对主系统存在阻尼的减振系统,研究了动力吸振器的优化和决策问题。对于多目标优化问题,采用改进的非支配解排序的多目标进化算法(NSGAII),求出Pareto最优解,由这些Pareto最优解构成决策矩阵,使用客观赋权的信息熵方法对最优解的属性进行权值计算,然后用逼近理想解的排序方法(TOPSIS)进行多属性决策(MADM)研究,对Pareto最优解给出排序。文中给出了4个设计参数、3个目标函数的动力吸振器优化设计算例。     

基于多目标粒子群算法的动力吸振器参数优化和决策研究

动力吸振器在船舶领域得到广泛应用.在船舶振动控制中需要寻找吸振器的最优参数,即最优频率比、最优阻尼比和最优质量比,使得结构在不同的频率激励下获得最好的减振效果.本文将基于多目标粒子群算法的优化技术与多属性决策方法联合运用,针对主系统存在阻尼的减振系统,研究了动力吸振器参数优化和决策问题.对于多目标优化问题,采用多目标粒子群算法(α-MOPSO)求出Pareto最优解,基于熵方法得到属性权重,用逼近理想解的排序方法(TOPSIS)对Pareto最优解给出排序.文中给出了4个设计参数、2个目标函数的动力吸振器优化设计算例.计算结果表明,文中提出的联合方法能够有效应用于动力吸振器的参数优化.     

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.     

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。     

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.     

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.     

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.     

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）.     

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.