材料科学与工程基础课程教学改革与实践

材料科学与工程基础是工科材料类专业的基础课程。本文结合材料科学与工程基础课程的性质和内容,针对教学中存在的问题,阐述了教学改革的必要性,并对课程体系、教学内容和教学方面等方面的改革进行了探讨。     

金属三维微结构加工技术的研究

三维微结构制作技术是MEMS加工的关键技术之一.现有的三维微细加工技术主要有利用SU-8等光刻胶形成的以IC工艺为基础的硅三维微结构制作技术和以同步辐射X射线曝光为基础的LIGA技术.但是,在传统的去胶液中,SU-8光刻胶会膨胀变形,从而可能导致图形的失败.而LIGA技术需要昂贵的同步辐射光源和特制的LIGA掩模板,加工周期长.为此,基于反应离子深刻蚀技术,结合电镀工艺,提出了一种金属微结构的微加工制作方法,并进行了相应的实验.结果表明,该方法不仅可以制造出深宽比为6的微型金属螺旋线圈,还可以为其他非硅三维微结构的加工提供一定的技术支持.     

三峡船闸六闸首输水阀门运行方式优化

针对三峡船闸五闸室泄水运行中存在的问题,通过数模计算分析和原型调试研究,在维持现有运行方式大体不变的条件下,采用实时监测到的箱涵出口与下游引航道水位差,确定与之相适应的动水关阀小开度控制阀门运行的方法,较好地解决了六闸首阀门枯水期不能正常关至小开度从而造成闸室超泄偏大和汛期枢纽下泄流量较大时人字门不能按程序正常开启的问题,给出了适应于不同下泄流量下的六闸首阀门动水关闭参数,可保证在通航流量范围内,五闸室泄水时均无须动用辅阀,提高了通航效率。     

论儿童游戏思维在平面设计中的应用

受儿童游戏思维的启示,分析得出儿童游戏思维与平面设计思维方式之间的共性。在此基础上,阐述了儿童游戏思维的想象精神、涂鸦精神、角色置换3方面的特征,并结合平面设计中相关的实际案例,提出儿童游戏思维在平面设计中应用的可行性。旨在为深入认识和探索复杂的设计思维领域开辟一个新的角度,为平面设计的发展与创新另辟新径。     

变革指挥家唐桥

自2011年6月开始担任五粮液集团有限公司董事长。唐桥掌舵的五粮液已经走过两个年头。在行业变局之下，王国春时代五粮液依靠高端酒和系列酒高举高打式攻城掠地的战略战术已经显露疲态。如何顺应时势进行战略、营销和渠道变革．是摆在唐桥面前的一道难题。虽然酒业风云变幻。各大白酒品牌均有所动作，细心的人可以发现．     

在中低端市场寻找自己的坐标——对话内蒙古顺鑫宁城老窖酒业有限公司常务副总经理、销售公司总经理徐艳征

从最初一线名酒量价齐跌，到现在的二三线区域白酒压力骤增，正在经历的行业调整已经深入到行业的每一个环节和层面。在这样的背景下。区域白酒企业要如何应对才能不被大浪淘沙？对此。内蒙古顺鑫宁城老窖洒业有限公司常务副总经理、销售公司总经理徐艳征有想法．也有办法。     

让核心消费者成为精耕驱动力——对话山东黄河龙集团强恕堂公司总经理白勇

2009年6月15日本刊第十二期刊登的《改革派黄河龙面临考验》一文中，曾对黄河龙自产品体系和营销模式发起的改革所遭遇的现实问题进行探讨。不过，当时山东黄河龙集团已经开始着手对所遭遇的问题进行解决，其中将高端品牌强恕堂独立出来成立强恕堂公司。     

Survey of users and providers of recycled water: quality concerns and directions for applied research

Users and providers of recycled water in Queensland, Australia, were canvassed to ascertain concerns about recycled water quality and directions for applied research. Some 79% of respondents had concerns about recycled water quality including microbiological components, such as viruses, parasites and bacteria, salinity related components, aggregate components, such as pH and solids, nutrients, organic components, including pesticides and endocrine disruptors, as well as quality variability. Relative differences in the proportion of concern for some quality characteristics were observed between the areas of different population density with those from the low population areas being more concerned than those from medium or high areas. Some users and providers observed changes in recycled water quality during distribution including nutrients, chlorine, solids, colour and odour. Some 52% of providers and 19% of current users propose to expand their usage and 30% of non-users propose to commence doing so in the next 5 years. Recycled water quality characteristics identified for applied research included microbiological components, organic components, nutrients and salinity.     

Tubulovesicular structures: what are they really?

The tubulovesicular structures (TVS) are the only structures unique at the level of thin-section electron microscopy for all TSEs so far examined. They were first described in NIH Swiss mice infected intracerebrally with the "Chandler" strain of scrapie by David-Ferreira et al. in 1968 [Proc. Soc. Exp. Biol. Med. 127:313-320]. TVS were described as "particles and rods ranging in diameter from 320 to 360 A(o)." The exact topology of TVS is not entirely clear. In most published electron micrographs, TVS appeared as spheres measuring between 20 and 40 nm in diameter. The number of neuritic processes containing TVS increases through the incubation period and has been shown to correlate with the incubation period and titre of infectivity in three longitudinal disease studies of scrapie and CJD. These studies, therefore, suggest that TVS may represent a primary pathogenetic event rather than a pathological product of disease. The predominant theory of the scrapie agent is now the "prion hypothesis" and its derivatives, which implies that a conformationally altered abnormal isoform (PrP(Sc) or PrP*) of a normal cellular membrane glycoprotein (PrP(c)) is the agent and its accumulation merely mimicks replication. If an abnormal fraction of PrP is indeed the infectious agent, (although it is no longer suggested in some quarters that protease resistant fraction of PrP(Sc) is the agent). The absence of stainable PrP in TVS, however, would indicate that they are not the ultrastructural correlate of the agent. However, TVS appear to be specific and unique to the TSEs, appearing before the earliest pathological changes and increasing in line with incubation period or titre. The very existence of TVS and their correlation with infectivity, therefore, urgently needs an explanation.     

浅析近期中日纺织品贸易的发展趋势

本文分析了近期中日纺织品贸易的两头及特点，提出了今后两国纺织品贸易的发展趋势，以及应采取的相关对策。