基于虚拟现实的船舶制冷动态仿真系统的开发

针对轮机模拟器在船舶制冷仿真训练方面过于简化的问题,对某集装箱船制冷系统采用移动边界法和流体网络法建立系统的数学仿真模型,运用VC++的MFC开发系统的二维可视化仿真界面,基于3ds Max建立系统的三维物理模型,并采用细节层次技术(LOD)对模型进行优化,再进一步导入OGRE视景引擎中实时渲染。仿真结果表明:船舶制冷动态仿真系统能够实现冰机间与冷库的三维虚拟漫游,实现在二维端和三维端的人机交互操作等功能,可用于船员对船舶制冷系统的针对性学习和培训。     

动态执行机构下船舶制冷控制动态储能算法

由于当前船舶制冷控制多采用PID算法,计算过程复杂,制冷耗时间长,无法满足船舶制冷的实际要求,提出基于动态执行机构的船舶制冷动态储能控制算法,该算法应用储能、制冷、控制3个阶段并行原理完成工作,通过计算控制偏差值完成船舶制冷系统的控制计算,计算过程简单。由实验结果可知,相同工况下,本文制冷系统工作效率远高于传统PID算法的舶制冷控制,降低了制冷成本,有效降低工作人员劳动强度,对于船舶制冷行业发展有一定的指导意义。     

船舶溴化锂吸收式制冷装置模拟器的设计与实现

文章基于微控制器和RTX-51 Tiny小型实时操作系统和CAN总线技术,设计开发了溴化锂吸收式制冷装置模拟器,描述了硬件组成和基于RTX-51 Tiny的软件设计方法,较好地实现了溴化锂制冷装置模拟器的采集、参数显示和通信等功能,该模拟器对于船舶溴化锂制冷装置的教学和训练具有一定的促进作用。     

制冷装置参数匹配特性

“制冷装置(电冰箱)参数匹配特性研究”是制冷系统优化的研究在电冰箱制冷系统中的实用化研究。制冷系统的优化研究是当前国际上制冷技术的前沿研究领域,有较高的理论与实用意义。长期以来,人们对制冷装置的设计计算都是采用稳态集中参数的方法进行。制冷系统的运行过程实际上是一     

一种新型制冷控制器的设计与实现

传统的小型制冷系统存在着能耗较大、测温系统精确度低等问题；在分析制冷系统工作原理的基础上，提出一种新型制冷控制器的设计思路。该控制器采用数字温度传感器DS18820来测量温度，采用模糊变频技术控制压缩机以降低制冷能耗，采用模糊控制技术测定霜层厚度。     

渔船制冷的节能设计研究

以前的渔船制冷,更多是对功能性与可靠性等方面的重视,从而忽略了运行的经济性。近年来,油价节节上升,制冷系统运行成本已经成为影响捕捞利润的重要原因。基于这样的情况下,本文介绍了了渔船制冷系统,其中更是从控制技术参数着手,着重讨论了实现冷库节能的措施。     

多级喷射器在船舶冷库节能中的应用

在现有船舶冷库制冷系统的基础上,设计一种利用喷射器代替高温库蒸发器和中温库蒸发器出口蒸发压力调节阀(背压阀)的制冷系统。该系统能有效提高制冷压缩机的回气压力,使压缩机的功耗减少,达到节能的目的。研究2种喷射器代替背压阀的方案对该制冷系统性能的影响,并采用不同环保工质(R134a、R404A、R407C、R407F、R410A和R507A)对2种制冷系统的制冷系数进行对比。计算结果表明:方案二的性能远好于方案一;在给定的工况下,方案二制冷系统的制冷系数与原制冷系统相比分别提高34.95%、47.69%、38.02%、38.56%、50.37%和43.36%。在此基础上,分别研究高温冷库蒸发器和低温冷库蒸发器的蒸发温度对方案二制冷系统性能的影响。     

小型船舶冷库制冷系统的改进设计研究

以某小型船舶冷库制冷系统运行中的几点问题为例,针对冬季冷却水温度偏低,冷凝负荷大幅变化时,制冷系统不能稳定运行和冷库制冷系统运行时振动噪声较大的问题,分别进行了原因分析,并给出了切实可行的改进设计方案,提高了冷库制冷系统的性能,降低了制冷设备的振动噪声水平,可以满足船员的使用需求.希望对制冷设计师和用户有所借鉴和启迪,进一步提升我国船舶冷库制冷系统的设计和应用水平.     

船舶制冷系统仿真研究及优化设计

制冷系统是船舶重要的辅助系统,对维护船舶的正常运行,提高船舶工作人员的生活质量有重要的作用。由于船舶制冷系统结构复杂,存在大量的阀门类部件(如溢流阀等),实际工作人员在操作时可能会发生操纵错误,而传统的实物培训方法存在成本高、见效慢、时间成本高等问题,因此,本文针对这一问题对船舶制冷系统的仿真模拟器进行了研究,主要包括船舶制冷系统的原理介绍、模拟仿真平台的原理介绍、制冷系统的数学建模与仿真等内容。     

某海上养殖工船的制冷系统设计

为回收利用制冷系统中的冷量,实现船舶的节能减排,以海上养殖工船为目标船,采用制冷机组和板式热交换器组合设计,根据板式热交换器的进出口的温差分析制冷机组的制冷量、板式热交换器的换热量及面积。结果表明,在制冷机组前加板式热交换器,可实现节能,降低营运成本。     

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.