Hodgetts+Fung

Craig Hodgetts and Hsin-Ming Fung are inspired by the ‘diverse and eclectic character’ of their adopted city of Los Angeles. As Denise Bratton explains, LA seeps into the very design process of their practice as much as it informs the character of their work. This is reflected in their dynamic scenographic approach, their bent for canny improvisation, and their attention to new materials and technologies. Copyright © 2005 John Wiley & Sons, Ltd.     

铸件轻量化、精确化的新进展--第63届世界铸造会议特种铸造及有色合金论文综述

介绍了第６３届世界铸造会议特铸和有色合金论文的主要内容及在铸件轻量化、精确化方面取得的最新成果,包括进一步扩大铝、镁合金应用领域;提高铸件质量的新经验;加速开发适用于铝、镁合金特点的精确成形技术的新进展;以及欧洲工业发达国家加快开发镁合金成套技术的新动向。     

切屑折断虚拟现实及WTK的二次开发

针对传统方法研制开发槽型刀具时出现的周期长,工作效率低等问题,在Visual C 6．0环境下,结合OpenGL和world Tool Kit软件,构建了桌面虚拟现实的软件平台,探讨了不同加工条件下切屑折断的虚拟现实．实验证明,该虚拟现实仿真的切屑折断与实际基本吻合,该系统对刀具的断屑性能可做到事先预测,缩短了刀具的研制开发周期,提高了工作效率,同时实现了槽型优选．     

基于SSL的安全WWW系统的研究与实现

文中提出并实现了一个基于安全套接字层（ＳＳＬ）技术的安全ＷＷＷ系统,该系统可为ＷＷＷ客户机和服务器的应用层通信应用软件提供数据加密、信息完整性,实体鉴别和非抵赖等安全服务,利用流机制和层服务者技术将安全套接字层嵌入操作系统内核,从而使安全服务对上层的所有应用软件透明,为提高浏览器的通信效率,文中提出了适合于系统内核实现的面向进程的握手保密会话。文中实现的安全ＷＷＷ系统可跨Ｗｉｎ３２（９５,９８,Ｎ     

GeoVR: a web-based tool for virtual reality presentation from 2D GIS data

A tool called GeoVR has been designed and developed under a client/server architecture to enable the interactive creation of a 3D scene and virtual reality modeling language (VRML) model from 2D spatial data by integrating Internet geographical information system (GIS) and HTML programming. The client front-end of this tool provides an HTML form to set properties for building 3D scenes, while the server back-end supported by off-the-shelf software: ArcView Internet Map Server and ArcView 3D Analyst through Avenue programming, processes the parameters and generates a 3D scene. This 3D scene is then transformed into a VRML model, which, together with its legend, is sent back to the VRML-enabled WWW browser for display and navigation. It is demonstrated that this tool, not only automates the conversion of the conventional 2D GIS data into VRML, but also adapts the current GIS 3D capabilities to the increasingly popular Web environment. The development of GeoVR offers new opportunities for geoscientists to build applications that benefit from virtual reality presentation based upon the existing GIS spatial databases.     

Javelin: Parallel computing on the internet

Java offers the basic infrastructure needed to integrate computers connected to the Internet into a seamless distributed computational resource: an infrastructure for running coarse-grained parallel applications on numerous, anonymous machines. First, we sketch such a resource’s essential technical properties. Then, we present a prototype of Javelin, an infrastructure for global computing. The system is based on Internet software that is interoperable, increasingly secure, and ubiquitous: Java-enabled Web technology. Ease of participation is seen as a key property for such a resource to realize the vision of a multiprocessing environment comprising thousands of computers. Javelin’s architecture and implementation require participants to have access to only a Java-enabled Web browser. Experimental results are given in the form of a Mersenne Prime application and a ray-tracing application that run on a heterogeneous network of several parallel machines, workstations, and PCs. Two key areas of current research, fault-tolerance and scalability, are subsequently explored briefly.     

一种基于Small World的P2P覆盖网络的研究

Small World网络的两个主要特性是平均路径长度小和聚集系数大,参照Small World网络的两个主要特性,提出了一种基于Small World的P2P覆盖网络模型（SWPP）,并在SWPP中定义了一套DHT协议,以该协议为基础,提出了SWPP的路由算法及路由容错算法,分析了路由长度及路由优化方法,最后通过数值实验分析了SWPP性能。     

Urban American Landscape

Landscape architecture has emerged from the deep sleep it entered during the Modernist period and remained in for most of the 20th century. Now, valued because of the environmental movement, stimulated by collaborations with architects and artists, and presented with opportunities to transform abandoned industrial sites, landscape architects are enthusiastically producing new kinds of parks on brownfields, along waterfronts, even on rooftops and in garbage dumps. Jayne Merkel here looks at ways the designed landscape is creating outdoor public space in a country where it has not always been valued. Copyright © 2007 John Wiley & Sons, Ltd.     

Forming Climatic Change

The Architectural Association in London is renowned for its unique unit structure in which avant-garde research and design strategies are incubated and hatched. In a new series edited by Michael Weinstock, Academic Head at the AA, the activities of the units are brought under the spotlight. ‘Unit Factor’ kicks off with an account by Steve Hardy and Werner Gaiser of the Environments, Ecology and Sustainability research cluster they lead. Copyright © 2007 John Wiley & Sons, Ltd.     

基于多Agent计算机仿真实验平台Swarm的综述

结合具体实例“热虫实验”,解释了Swarm在人工世界环境下进行计算机仿真模拟的基本思想,探讨了Swarm的主要概念和系统结构;进而以Java语言为例介绍了面向对象思想用于Swarm编程的基本情况,并对Swarm所提供的软件工具包给出了Java形式的详细说明。