基于UG/Open技术的冲压模架标准件库的开发

基于UG的参数化建模方法和部件族功能,采用VC++编程,结合UG二次开发工具包UG/Open建立冲压模架标准件库.采用菜单显示,用户对话框操作,实现无缝集成,快速调用,提高模具设计效率.     

The Young Experimentalists

Experimental architecture in Italy began to take a new form in the 1990s when young architects, who were embracing new digital technologies, also began to go abroad to study and practise in greater numbers. Anna Baldini outlines a fecund strand in Italian architecture which, while no longer wholly new or youthful, retains its vitality. She highlights, in particular, the contributions of: Avatar Architettura, Gianluca Brini, Elastico spa+3, Exposure Architects, Giuliano Fausti, Luisa Fontana, Giorgio Goffi, ian+, Iotti+Pavarani Architetti, Fabrizio Leoni, ma0/emmeazero, Antonella Mari, Metrogramma, Open Building Research (OBR), RoccAtelier, studio.eu and Vulcanica Achitettura. Copyright © 2007 John Wiley & Sons, Ltd.     

轧钢高压水除鳞喷射阀启闭特性分析

轧钢高压水喷射除鳞对提高钢材轧制表面质量效果明显 ,除鳞喷射阀结构特殊 ,由气压驱动 ,其启闭特性与一般水阀不同。分析了其阀芯所受水压力 ,液流力及密封的摩擦力 ,从而给出了启闭喷射阀所需气压作用力的计算式 ,并以研制的喷射阀的实际数据作为例子计算了该阀的启闭特性 ,解决了阀门流量大 ,压力高启闭难的问题。     

面向对象的传输电路查询系统的实现

介绍了采用面向对象的语言VC＋＋、利用Microsoft基本类库MFC封装类库来实现传输电路查询的系统,并给出了系统的具体实现方法。     

面向用户的可配置开放式数控系统的研究

研究了一种基于ＰＭＡＣ运动控制器的开放式数控系统,该系统以机床制造商及最终用户对数控系统开放性的需求为设计目标,为用户 可以高效地构筑定制数控系统的配置系统。本文介绍了该系统的硬件结构,并重点讨论了配置系统的实现方式、特色及实现的功能。     

开放域环境中客户端敏感信息的保护

以公钥基础设施、权限管理基础设施和X.509标准中发布的属性证书为理论基础,提出了在开放域环境中与服务器端逻辑地位对等的、保护客户端敏感信息的安全访问控制模型。该模型可以很好地解决现在一些系统中存在的安全问题,并且可以扩展成多域之间的安全互访问模型。     

增强现实中虚拟物体制作的研究

增强现实是把计算机产生的虚拟物体合成到用户看到的真实世界中的一种技术。介绍了增强现实中虚拟物体所涉及的一些关键技术,包括虚拟物体的建模、摄像头标定、骨骼动画以及虚拟场景的优化,说明了如何将这些技术应用到实际系统中。     

How do open space characteristics influence open space use? A study of Melbourne’s Southbank Promenade

ABSTRACT

With the importance of open spaces to urban quality of life being increasingly recognized, knowledge about which spatial characteristics influence open space use, how, and why is of growing interest to open space researchers, designers and managers. Through an observational survey of Southbank Promenade in Melbourne, Australia, the research examines how various specific design characteristics of open spaces correspond to their actual uses. The findings show that different levels and kinds of uses are associated with the different space features of three distinct sections of Southbank Promenade, under varying time and weather conditions.     

Generating quality open content: A functional group perspective based on the time, interaction, and performance theory

We applied the input-process-output approach and time, interaction, and performance theory to examine the input factors (organisational, group-related, and individual) and process factors (group production, group well-being, and member support) that yield group effectiveness, measured as high-quality articles in Wikipedia. The results provided evidence of the positive effects of: group size and shared experience on both group process variables and group effectiveness; group heterogeneity on group production; organisational support and member activeness on group well-being; member activeness on member support; and organisational support and member activeness on group effectiveness.