网络环境下数据挖掘技术在图书馆信息服务中的应用

数据挖掘是一门新兴的数据分析技术,当数据挖掘技术应用于网络环境下的WEB中就成为WEB挖掘。数据挖掘技术对图书馆业务工作的支持主要体现在信息咨询、信息个性化服务等方面。在网络环境下,数字图书馆中图书馆员必须掌握这种数据挖掘技术才能更好地为信息需求者提供有效快捷的信息服务。     

PROGRESS IN OPERATIONS MANAGEMENT

In this issue, Robert Hayes has written provocatively about the implications of the digital economy for Operations Management (om). Here I examine and illustrate a simple four‐stage framework for thinking about these implications: advances in digital technology (stage 1) lead to business developments (stage 2), which impact the views of OM‐relevant thought leaders (stage 3), which influence the conduct of OM activities (stage 4). This framework provides a perspective for viewing the evolution of OM and indicates how educators, researchers, and practitioners can steal the march on mainstream thinking.     

INTERNET互联网络以及计算机技术在情报研究和信息咨询中的应用分析

从ＩＮＴＥＲＮＥＴ网络的功能出发,说明ＩＮＴＥＲＮＥＴ互联网络对图书馆情报,社会科学以及商贸之间的作用和联系,并且进一步说明随着信息电子化的发展,它将彻底改变现有的有各行业务作业方式和手段,实现网络共享,提高营用效率,降低成本,且更具时效性。     

国际互联网与环境教育信息资源

国际互联网为环境教育提供了丰富的信息资源,为方便国内有兴趣的读者了解和应用这些资源,本文简要介绍了国际互联网上与环境教育有关的２３个网点的网址及其主要信息类型     

Structural changes in the 2003–2009 global hyperlink network

In this study, we examined the structure of the international hyperlink network as a global communication system at two different points in time (2003 and 2009). Research was carried out on the web‐based network linking country code top‐level domains (ccTLDs) that represent countries, using hyperlink connectivity by the means of network analysis. The results indicate that the 2009 international hyperlink network was completely interconnected. G7 countries and Spain were at the centre of the network. At the periphery were poorer countries from Africa, Asia, and Latin America. In addition, several regional clusters based on geography, language and culture emerged. A comparison of the 2003 and 2009 results showed that the level of centralization and diversification among semi‐peripheral countries increased. We discuss the results from the perspective of world‐systems theory. We propose methodological procedures to overcome potential bias in international hyperlink data.     

远程数据采集系统接入INTERNET的一种实现方法

应用一款基于AVR RISC的低功耗CMOS 8位单片机AT90S4433构成数据采集系统,利用Seiko公司的S7600A硬件协议堆栈芯片完成通讯数据的协议封装联入INTERNET.该方案结构简单,是低端嵌入式单片机联入internet的一种有效方法.     

PLAYING THE BEER DISTRIBUTION GAME OVER THE INTERNET

This paper describes an Internet implementation of the Beer Distribution Game. Many teachers demonstrate the bullwhip effect that is often observed in supply chains by playing this game with their students. This implementation has the advantage of considerably reducing the time required to play the game.     

How social media transform migrant networks and facilitate migration

We argue that social media are not only new communication channels in migration networks, but also that they actively transform the nature of these networks and thereby facilitate migration. Despite some limitations, which stem from the ‘digital divide’ and the lower trustworthiness of virtual ties, qualitative data reveal four relevant ways in which social media facilitate international migration. First, they enhance the possibilities of maintaining strong ties with family and friends. Second, they address weak ties that are relevant to organizing the process of migration and integration. Third, they establish a new infrastructure consisting of latent ties. Fourth, they offer a rich source of insider knowledge on migration that is discrete and unofficial. This makes potential migrants ‘streetwise’ when undertaking migration. Based on these empirical findings we conclude that social media are transforming migration networks and thereby lowering the threshold for migration.     

ADSL技术在局域网中的应用

本文从设备安装、软件安装和参数设置等方面介绍了ADSL技术在局域网中的应用,对ADSL技术在应用过程中出现的常见故障进行了分析.     

浅析网络防火墙

防火墙是一道竖在被保护的内部网和不安全网络之间的安全屏障.通过介绍防火墙的作用、系统构成和如何根据实际情况选择防火墙,使人们对防火墙技术有全面的了解.