Fe-Ni-Cu-C合金粗粉注射成形的热脱脂工艺研究

对平均粒度为60μm的Fe-Ni-Cu-C合金粗粉注射成形坯进行了热脱脂,用差热分析仪测定了粘结剂各组元的DTA和TGA曲线,制定了合理有效的热脱脂工艺。结果表明:对于石蜡基多聚合物粘结剂体系,采用分步热脱脂,有利于维持坯体形状;热脱脂的升温速率对脱脂坯质量影响显著。     

金属注射成形喂料的制备

研究了石蜡(PW)和低密度聚乙烯(LDPE)的含量、粉末装载量和脱脂方法对脱脂保形性的影响。结果表明,低密度聚乙烯含量高、粉末装载量高有利于脱脂保形;经溶剂脱脂再进行热脱脂产生的缺陷比直接热脱脂产生的缺陷要少得多。     

DBN400／32—12型乳品分离机通过鉴定

绿洲机器厂研制的DBN400/32—12型乳品分离机是一种高速碟式部分排渣分离机,适用于牛奶的净化、脱脂和标准化,也可以用于其它行业相似物料的固—液两相分离或液—液—固三相分离。该分离机已于     

紫外线硬化型粘结剂

日本洛克泰特—西兰特种金属粘结剂公司最近试制出一种用于光学器件和玻璃的透光型紫外线硬化粘结剂“洛克泰殊349”。这种粘结剂在紫外线(UV)产品中,透明度最高,而且无论在高温高湿试验或 PCT,     

采用ITU—R P．1546—3建议书的海上VHF无线覆盖预测方法

通过对ITU—R P．1546—3建议书的研究分析，扩展了P．1546—3建议书用于海上VHF无线场强预测的方法，同时结合经典系统余量公式的修正应用，获得准确的覆盖预测结果。希望对VHF无线覆盖预测具有实用价值。     

GPS—RTK技术在河道测量中的应用

随着GPS—RTK技术的发展，它在测量工作中的应用也逐渐广泛起来，文中主要对GPS—RTK技术在河道测量中的应用进行总结研究。阐述了GPS—RTK技术的概念以及它的工作原理，并探究了它的技术特点，分析了GPS—RTK技术的主要操作步骤，研究了它在河道测量中的应用，最后做出总结。     

环氧水下粘结剂的水下灌注施工工艺及应用

传统的水下钢筋混凝土结构物维修工艺复杂,施工难度大,而采用灌注环氧水下粘结剂的方法可以方便地对面积较小的混凝土缺陷进行快速有效地修复,环氧水下粘结剂密度大、黏稠度高,其施工尚无专用设备和工艺。本文结合实际工程介绍了环氧水下粘结剂的水下灌注施工工艺,为类似海港工程混凝土结构物水下维修提供参考。     

高速船窗玻璃的粘结连接

介绍了高速船窗玻璃粘结连接的优越性，相应的结构设计和建造技术，粘结剂类型的选择及粘结工艺等。     

废热利用的油-氟里昂发电系统

本文论述了废热利用的油—氟里昂发电系统的工作原理和特点,阐明了中间热介质(多元酚酯油)和透平的工质(氟里昂—113)的性质以及直接接触式热交换器的特性;并对各种废热利用的油—氟里昂发电系统的设计作了简要的说明。     

锦江航运青岛——日本穿梭航线首航

2011年9月17日，锦江航运的青岛——日本穿梭航线顺利首航。这是锦江航运首条外港航线，也是锦江航运“走向全国，走向亚洲”的重要一步。青岛——日本穿梭航线是锦江航运在巩固“第一个圆心”（以上海为圆心，向日本关东、关西、关中辐射）的基础上，启动的“第二个圆心”（以日本为圆心，向我国沿海港口以及华南、华北辐射）布局。     

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。