MC meets DFSS

Looks at how design for six sigma (DFSS) is one route to unravelling the potential complexities of mass customisation (MC).     

冷冻式干燥机维修保养浅析

针对冷干机各种主要故障进行了描述和解释说明,并提出了日常保养的要求。     

Nanorefrigerants for energy efficient refrigeration systems

Journal of Mechanical Science and Technology - Nanorefrigerants, which are a new class of nanofluids, are mixtures of nanoparticles and refrigerants. They have several potential applications in...     

吸收式制冷计算机辅助教学(CAI)软件的开发

开发了吸收式制冷计算机辅助教学（Computer-aided instruction,CAI）软件,并介绍了该软件的结构、功能和开发中应注意的问题.该软件可形象地演示吸收式制冷循环的“动态”流程,解决了困扰师生多年的吸收式制冷“教”、“学”难点,提高了教学效率和效果.     

大量程、高精度超声测距仪设计

针对现有超声测距系统测距距离短、精度不高的缺点,提出了一种利用积分电路进行距离增益补偿的方法,设计实现了以C8051F320单片机为控制器的超声测距仪.该系统采用超声收发一体化防水传感器,利用发射超声波与反射回波时间差来测量待测距离,并实时测量环境温度以修正超声波传播速度.实验表明:系统性能稳定,精度高、量程大,有广阔的应用前景.     

基于改进的液压空调制冷技术应用研究

制冷技术是一门比较实用性的技术,其应用已经渗透到人们生活和生产活动的各个领域,如何经济高效地实现制冷是人们现今比较关注的话题,针对该问题,该文采用了一种改进的液压来实现制冷方法,并对这个技术的原理进行了重点剖析,分析了其组成和用途,最后将提出的技术应用在汽车领域,仿真实例表明,提出的方法可以有效地实现制冷控制,实践证明了液压制冷的可行性.     

Low Dynamic Range Solutions to the High Dynamic Range Imaging Problem

While capturing a real world scene using a common digital camera,due to limitations of the sensar dynamic range,we will not be able to capture the entire dynamic range of the soene.This problem is evident while capturing a picture of a scene which has both brightly and poorly illumninated regions.High Dynamic Range (HDR) imaging aims to recover the entire dynamic range of the scene by compositing multi-exposure images.Tone reproduction is required for displaying HDR images as the corresponding Low Dynamic Range(LDR) images on common displays.This paper discusses novel approaches to reconstruct LDR images directly from multi-exposure images.It is assumed that there is no knowledge of camera response function and other caraera settings.At last,it is explained how this task can be achieved effectively for static and dynamic scenes.     

Novel refrigeration lubricants for use with HFC refrigerants

A series of fluorinated alkyl aryl ethers composed of hydrocarbon components, fluorinated alkyl groups and ether linkage groups were evaluated as refrigeration lubricants for use with hydrofluorocarbon (HFC) refrigerants. The novel structure of these lubricants eliminates the problems of poor stability and high moisture absorption that are associated with conventional refrigeration lubricants for use with HFC refrigerants, such as polyalkylene glycol or polyol ester, which have a polar structure. The fluorinated alkyl aryl ethers show high miscibility with HFC refrigerants, high stability, excellent lubricity, and low moisture absorption. These characteristics make fluorinated alkyl aryl ethers well suited to serve as refrigeration lubricants for use with HFC refrigerants.     

食品真空冷冻干燥国内外最新进展

本文对真空冷冻干燥方法的优点，冻干食品的种类以及国内外生产的食品真空冷冻干燥机的情况作了介绍，并重点就远东最新型食品真空冷冻干燥机的五大特点：配置优化、高性能、高可靠性、结构合理、使用方便作了介绍。     

热电制冷微型低温恒温器的研究与设计

以热电制冷器为制冷源的微型恒温器,采用热电制冷器进行冷却。用同时限定隔热层外表面的最低温度与单位面积隔热层的漏热量的方法确定隔热层厚度,以同时满足降温阶段冷负荷与稳定工作阶段冷负荷确定制冷量,给出了设计方法。     

The competitive challenge

In an extract from the Royal Academy of Engineering 1993 Engineering Manufacturing Forum Lecture Bob Beaty looks at those things which make a company world class.     

应对挑战

捷克Triton公司是一家计算机与通讯设备数据屏蔽箱体制造商。以前，该公司是用几种手工加工方法制造钣金件。自从引进了RAS公司的多功能折弯中心（Multibend-Center），尽管箱体件主要材料的钢板价格上涨了70%，但公司仍取得了成功。引进多功能折弯中心实现自动化生产是该公司成功的关键。[编者按]     

甲烷制冷压缩机结构特点及故障分析

介绍了甲烷制冷压缩机的特点，分析了在运行过程中典型故障发生的原因，提出了处理方法。     

Low pour point polyalkyl benzene oils for refrigeration compressors

In this paper, the results of fractionation of polyalkyl benzene residues from monoalkyl benzene production, using a molecular evaporator to obtain fractions which are usable as lubrication oils for refrigeration compressors with a non-polar refrigerant, are presented. Two of the distillion fractions pre-pared correspond to international viscosity classes I S 0 VG 22 and 46. Their yields of 45 and 15% respectively from the original residues are economically interesting and they are of a higher quality than the previously used mineral oil based lubricants. The polyalkyl benzenes have improved properties, such as viscosity index, flash point temperature, and pour point. The lower thermo-oxidative stability of the fractions is compensated for formulations with appropriate antioxidants.