溶剂热法制备纳米α-Fe2O3

以Fe(acac)3为单源前驱体,聚乙烯醇为表面活性剂,在不同溶剂条件下,采用溶剂热合成方法成功地制备了α-Fe2O3纳米颗粒,并用X-射线衍射(XRD)、能量分散谱仪(EDS)、扫描电镜(SEM)、透射电镜(TEM)和选区电子衍射(SAED)等测试手段对产物进行了表征。研究结果表明:以无水乙醇为溶剂所制得的α-Fe2O3平均颗粒尺寸为10 nm,粒径分布均匀;以正丁醇为溶剂所制得的α-Fe2O3纳米颗粒呈球形,平均颗粒尺寸为40 nm。     

纳米Cu-La_2O_3-Ce_2O_3粒子添加剂润滑油摩擦性能研究

纳米Cu、La2O3、Ce2O3粒子添加于500SN基础油中,采用四球摩擦磨损实验机考察其摩擦学性能,结果表明:64nm粒径的Cu粒子与25nm粒径的La2O3-Ce2O3粒子匹配效果良好;纳米Cu粒子与纳米La2O3-Ce2O3粒子的质量比2∶1、总质量分数0.8%,润滑油抗磨减摩性能和极压性能优于现有的两种纳米粒子作为添加剂的润滑油;清净分散剂增加使用WFL-1000聚醚胺效果良好。     

聚苯胺/牛血清白蛋白/钙钛矿纳米复合材料的制备及表征

在水溶液中,以粒径在26.4～29.6 nm的La0.7Ca0.3Fe0.25Co0.75O3纳米晶体复合氧化物为母体构造出苯胺/牛血清蛋白/La0.7Ca0.3Fe0.25Co0.75O3复合物.牛血清白蛋白和苯胺单体在溶液中组装到La0.7Ca0.3Fe0.25Co0.75O3纳米晶体表面,从而使得吸附牛血清蛋白的La0.7Ca0.3Fe0.25Co0.75O3纳米晶体表面包裹了一层苯胺,以苯胺/牛血清蛋白/La0.7Ca0.3Fe0.25Co0.75O3复合物为前驱体通过进一步化学氧化得到聚苯胺/牛血清蛋白/La0.7Ca0.3Fe0.25Co0.75O3复合材料.利用紫外-可见光谱研究了牛血清蛋白和苯胺的相互作用,用IR、EDS和SEM对复合材料进行表征.结果表明：苯胺影响了牛血清蛋白的α-螺旋程度,导致牛血清蛋白的最大吸收波长发生变化.复合材料具有较强的中红外吸收,呈连续网状结构.     

络合沉淀法制备纳米Co3O4的工艺研究

以Co(NO3)2·6H2O等钴盐,NH3·H2O,H2O2和NaOH为原料,采用络合沉淀法在水溶液中直接制备出了纳米Co3O4,通过X射线衍射仪(XRD)和扫描电镜(SEM)等观测,讨论了不同反应物、反应物之间的摩尔比和反应温度等制备条件对反应产物组成和结构的影响.研究结果表明本制备工艺能够制得纯度高,分散性能好,颗粒分布均匀,结晶度较高的球形纳米Co3O4.纳米Co3O4的最佳制备工艺条件[Co(NH3)6](NO3)3与Co(NO3)2 的摩尔比为2.5～31,NaOH 与Co(NO3) 2的摩尔比为0.9～1.21,反应温度为80℃.     

舰船舱室环境对分子筛负载纳米TiO2分解甲醛性能的影响

采用密闭实验舱模拟舰艇舱室环境。以分子筛负载纳米TiO2的分解效率为依据,考察了其对甲醛的催化分解性能。结果表明,纳米TiO2的分解效率随着温度的上升而显著提高,随湿度的升高而降低,光照强度对纳米TiO2的催化效能影响不大,而过高的甲醛初始浓度也会降低纳米TiO2的分解效率。     

舰船高温排烟管表面纳米Al2O3-CeO2/Ni镀层的微观组织和抗高温氧化性能

为了制备具有优异抗氧化性能的复合镀层,试验采用双脉冲电源,在舰船高温排烟管试样表面沉积Al2O3-CeO2/Ni纳米复合镀层,通过抗氧化性能测试,研究了Al2O3纳米颗粒浓度和CeO2浓度对复合镀层的抗氧化性的影响。试验得出复合镀层的微观组织随着Al2O3颗粒的添加细化晶粒,当镀液中纳米CeO2颗粒浓度增加到1.5 g/L时,晶粒尺寸分布均匀,同时镀层表面平整、致密;复合镀层的抗氧化性随镀液中纳米Al2O3浓度增加而增加,随CeO2浓度的增加先降低后增加。     

银源浓度和包覆剂对纳米银线线径的影响

纳米银线因其具有良好的导电性和优异的光学性能,是传统导电材料氧化铟锡(ITO)的理想替代品.为了降低纳米银线的直径并提高均一性,采用多元醇法制备纳米银线,分别考察了形核控制剂浓度、反应物浓度和包覆剂种类对纳米银线生长过程的影响.结果表明,在AgNO3浓度为25 mmol/L,保持Cl-浓度为300μmol/L的基础上,添加10μmol/L的Fe3+时,纳米银线平均线径为53.2 nm,线径均一.此外,单独使用长链PVP作为包覆剂时,反应产物中的颗粒、短棒等杂质最少.     

纳米LaxSr1-xCu1-yCoyO3的制备和光电催化特性

用甘氨酸-硝酸盐燃烧法制备LaxSr1-xCu1-yCoyO3纳米晶体复合氧化物,并用XRD、SEM、EDS以及IR对纳米晶体的晶型、晶粒大小、形貌及组成进行表征,晶体粒子是球形的,粒径在17.8~43.7 nm之间,为正交和立方晶系。用活性碳为载体制备功能氧电极,采用三电极体系,测试循环伏安曲线,发现该氧电极具有双功能催化特性,但不完全可逆。利用汞灯作为激发光源,对水溶性染料进行光解实验,利用紫外-可见、红外以及人工神经网络光度法研究LaxSr1-xCui1-yCoyO3的催化性能。结果表明:LaxSr1-xCu1-yCoyO3(x=0.3,0.7;y=0.3,0.7),具有较强光催化特性,该复合氧化物催化剂对含有5种染料的废水具有高效脱色作用。     

催化分解二茂铁制备碳纳米片及其结构表征

以二茂铁为催化剂和碳源,硫粉为辅助剂,采用催化分解技术,在500°C时制备碳纳米片,成炭率高达95％左右．结构测试结果表明：酸处理后的主要产物为非晶碳纳米片,其厚度约为40 nm．氮气吸附脱附结果表明：合成的碳纳米片为介孔材料的特征吸附脱附等温线,比表面积为41.1 m2/g,孔径主要集中在3.5～5 nm．     

基于40Cr杆件的防腐涂层腐蚀试验研究

在保证抗拉强度的情况下,为降低40Cr杆件表面腐蚀并提高其表面硬度,本文设计了镍铬合金/金属陶瓷复合涂层及镍铬合金/含防污剂的微纳米Al2O3.TiO2复合涂层,并对WCCoCr、CrCCrNi、Al2O3.TiO2及氧化铬等陶瓷涂层进行了中性盐雾腐蚀、电偶腐蚀、实海腐蚀等试验,试验结果表明高速火焰+爆炸喷涂微纳米Al2O3.TiO2复合涂层综合性能良好,可有效提高杆件的耐腐蚀性能和表面硬度。     

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;     

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.     

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.