基于灰色加权关联与MS-LSSVM组合的舰船备件需求预测

运用灰色加权关联方法对影响远海舰船备件消耗的主要因素进行分析,以确定备件消耗影响因素的权重大小,以此为依据来筛选出主要影响因素,在此基础上运用支持向量机理论,建立灰色加权关联分析与多尺度最小二乘支持向量机组合的学习模型,将筛选得到的主要影响因素的样本值作为输入值进行学习训练,较好地解决了影响因素与备件消耗之间的非线性关系。实例应用表明,该模型对舰船备件需求的预测具有较高的精度。     

舰船机电器材备件战备储备定额研究

建立了以战损消耗和非战损消耗两部分组成的舰船机电器材备件战备储备定额模型。提出了战损消耗部分舰船机电器材备件战备储备定额的计算方法,以平时消耗为基础,提出了非战损消耗部分舰船机电器材备件战备储备定额的计算方法,并依此模型对两型舰船战备储备定额进行了计算。     

装备维修备件需求预测模型研究

准确的备件需求预测是合理有效地进行备件保障各项工作的基础,在综合分析考虑备件消耗影响因素的基础上,建立了备件需求预测模型。该模型可用于备件的管理决策,提高备件保障率。     

装备保障中备件需求量确定方法研究

备件对提高装备的可用度与战备完好率有着举足轻重的作用,是保证装备正常发挥战斗力的重要物资。研究了影响备件需求的主要因素,建立了不同寿命分布设备备件需求量的确定模型,对于不可修设备、可修设备、消耗件,也分别建立了备件需求量的确定模型。     

船舶备件管理与决策系统开发研究

文中主要是收集船舶航行的备件损耗数据,通过粗糙集理论对这些历史船舶备件使用数据进行分析研究,得到在特定的环境下,影响船舶备件使用寿命的最直接的影响因素,预测可能出现的备件损耗情况,为船舶航行备件的库存管理提供辅助决策。     

船舶轮机备件管理

在船舶营运中,轮机备件的科学管理、备件的合理添置及使用,对保证船舶安全生产、提高营运率、降低成本支出等具有重要的作用。本文从分析船舶轮机备件管理的性质及特点人手,从备件的预测、申领、登记、保管和合理使用等方面介绍了轮机备件管理的方法、细节及注意事项,明确了轮机备件管理的重要性,对备件管理的科学化、系统化提出了建议。     

基于LS-SVM的间断性需求备件预测

我国近年引进国外装备时间不长,其备件的历史数据较少、需求具有间断性且具有大量零值,给预测工作带来了一定的困难。文章提出应用最小二乘支持向量机（Least Squares Support Vector Machines LS-SVM）这一新的机器学习方法来实现间断性需求备件的预测,建立了舰艇间断性需求备件的预测模型,并对某型舰艇备件进行预测和分析,结果表明：LS-SVM在间断性需求备件预测上表现出优秀的学习和预测能力。     

远洋船舶备件的库存决策研究

根据远洋船舶及其备件管理的特点，首先，对备件消耗情况进行统计推断，确定其概率分布模型。然后，分析备件库存的有关费用，建立其经济存贮模型，从而做出备件库存的最优决策。     

基于故障树的备件需求预测研究

作为装备备件需求预测的重要方法之一,故障树分析法是对现有成熟装备的主要预测方法.在分析装备结构的基础上,结合装备故障情况建立相关故障树模型,并通过某型导弹的例子给出了在保障度一定的前提下,如何对装备中备件进行有效的预测配置,为备件需求预测研究提供了必要的理论基础.     

加强船舶轮机备件合理化管理

船舶轮机备件管理是机舱管理中的一个重要环节,是指对备件的预测、申领、购置、保存、登记及使用等一系列科学的管理方法。在船舶营运中,轮机备件的科学管理、合理添置及使用,对保证船舶航行安全、降低成本等具有重要的作用。本文提出当前船舶轮机备件管理中存在的一些问题,望轮机管理人员引起高度重视,并提出相应对策,以作参考。     

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;     

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.     

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。     

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.