三种IP VPN技术实现方案的比较研究

VPN是企业内部网在因特网等会共网络上的延伸。通过一个私用的通道采建立一个安全的私有连接,将运程用户、公司分支机构、公司的业务伙伴等跟公司的内部网连接起来。构成一个扩展的公司企业网。通过虚拟专用网络既实现了传统专用网络所需的性能,同时相对于传统的专用网络又大大降低了网络的运营成本。对VPN技术的原理进行分析研究,可以充分发挥其优势,为企业的现代化管理与经营服务。     

美国金融危机根源的解读及对中国的启示

一切危机都是源于根本矛盾的集中爆发,导火索只是必然中的偶然。在由次贷风波引爆的美国金融危机波及全球的背景之下,重新审视两大经济学范式下的三种危机理论,全面把握经济危机的本质和根源,深入解读资本主义经济危机,探索化解经济危机理论和政策,对于中国社会主义市场经济的发展有着十分重要的启示。     

虚拟企业供应链及其“魔方”组织结构

虚拟企业关注＂敏捷＂,供应链强调＂精益＂,如何精益地实现敏捷生产与服务则是虚拟企业供应链的研究范畴。首先给出虚拟企业供应链的概念,然后提出虚拟企业供应链＂魔方＂组织结构模式,并对该组织结构的特点和类型进行定性分析。希望通过研究能有助于虚拟企业、供应链的深入研究,丰富虚拟企业供应链的探索。     

工程制图教学中虚拟模型库使用效果分析

工程制图课程传统的教学模式是从二维到三维再到二维,学习起来比较吃力。教学实践表明,借助于三维CAD软件强大的三维实体造型功能和工程图模块,通过对工程形体的实体模型演示,把形体的抽象、静止的内容转换成形象、生动的立体模型图,采用先三维、后二维、再三维的模式进行教学,收到了良好的教学效果。     

军队院校EDA教学实验室建设的思考

本文首先指出了传统实验室教学方式的不足和EDA教学实验的优势,其次给出了科学合理的规划、建设EDA实验室的方案,最后提出了注意事项。     

补充货币、社区货币及其试运行路径

通过对克鲁格曼、列特尔和党爱民等学者的研究文献解读，有了补充货币及其社区货币中国试运行的四种选择路径：公益互助性的城市社区货币所昭示的时间经济具有旺盛的生命力；在农村流行的道义性“社区货币”中硬塞进一个信用券证无助于扶贫济困；以名目繁多的消费券为主要标志的社会分红试验显示出全民分红逐渐推广的重要迹象；对网络虚拟货币突破货币发行政府垄断之“门”的小小缺口，宜疏不宜堵。     

Using Laboratory Experiments in Logistics and Supply Chain Research

Laboratory experiments provide an underutilized methodology for subjecting research in logistics and supply chain management to rigorous scientific scrutiny. As discussed in this paper, by following established procedures researchers can create an economic system in which behavior can be observed and replicated. With the ability to control the institution and the environment, researchers have complete information and can exogenously manipulate treatment variables, neither of which may be feasible in field work. We also address many of the reservations that skeptics of laboratory experiments often express including issues of realism, participant sophistication, and payoff stakes. We then provide several examples where experiments have been used to study issues relevant to logistics and supply chain management including auctions, wholesale practices in gasoline markets, inventory replenishment, liberalization of the electric power industry, and deregulation of the natural gas markets. Finally, we identify several additional areas where laboratory experiments could be informative.     

浅谈云计算虚拟化实验室

随着软件业的迅猛发展,软件产品的质量控制与质量管理正逐渐成为企业生存与发展的核心。软件测试实验室是以学院信息化发展和软件综合能力建设为目标,以IT信息化服务,实训实验服务,项目实施,产品孵化,特别是IT技术相关用户为服务对象,通过有效整合学校院系、科研院所、科技中介服务机构以及企业和用人单位等优势资源,面向业界技术共性需求提供公共服务的国际化创新实验室。软件测试实验室应具有国际化的专业化水准,能够提供区域性IT综合服务。     

An analysis of information overload with implications for survey design research

Abstract

A laboratory‐type experiment was conducted to examine potential information overload causes and solutions. It was found that both information quantity and information complexity are potential causes of information overload. The experiment results also suggested that information overload problems may be reduced through carefully designed information display patterns. When designing survey questionnaires, attention must be given to potential causes of information overload. Methods of presenting information that ameliorate information overload must also be considered. As demonstrated in this study, survey designs can be tested in controlled, laboratory‐type experiments. The results of these experiments can then be used to improve the design of field survey questionnaires.     

Editorial

Technological change is altering the way educators deliver subject content. The phenomenal growth and widespread acceptance of the Internet has seen the creation of the Virtual Learning Environment (VLE) in higher education. For the ease of integration of VLEs in higher education, software companies have provided products such as WebCT and Blackboard. From a pedagogical perspective, new technologies must be evaluated in an effort to establish whether their introduction has had a beneficial impact on learning outcomes. To this end, this investigation examines the attitudes of undergraduate accounting students in relation to a number of design features and attributes of WebCT (e.g. bulletin boards, on-line assessment and chat room) as a VLE. Responses from 292 on-campus undergraduate students provided data which associates four factors with improved student motivation. This study found that student satisfaction with the use of a VLE is significantly associated with the provision of: lecture notes, bulletin board, on-line assessment and other tools (chat and video summaries). The diagrammatic representation of the variables identified in this study provides a useful reference point for those educators contemplating the implementation of a VLE.