双语词汇通达：理论、范式及其研究进展

从双语词汇通达的理论假设、研究范式、实验研究等方面介绍了当前双语词汇通达的研究现状与进展。指出了目前双语词汇通达研究面临的一些问题以及未来的研究方向,认为未来的研究一方面要运用多种研究范式探讨双语词汇通达的机制,另一方面要探讨双语词汇通达的机制是否因为双语类型的不同而不同。     

三层结构安全售票系统

本文针对售票系统面临的安全威胁和安全需求 ,并不改变售票流程的基础上提出了一种基于多种安全技术的安全售票系统 ,系统中所采用的安全方案可以依据实际的安全需要进行设计 ,具有较好的灵活性。     

一类积微分方程自由边界问题解的误差估计

讨论带跳扩散模型下美式期权价格及最佳实施边界当执行日期趋于无穷大时的误差估计。在相应的基本假设下,美式期权的定价模型是一个抛物积微分方程自由边界问题,而永久美式期权的定价模型是一个积微分方程自由边界问题。利用抛物型偏微分方程的极值原理,得到了带跳扩散模型下美式期权价格及最佳实施边界的误差估计。     

基于RBAC的访问控制在信息系统中的应用

访问控制是管理信息系统经常采用的安全措施之一．对RBAC(基于角色的访问控制机制)的基本原理进行介绍,然后结合某档案管理信息系统的开发实例,介绍了RBAC在信息管理系统中的设计和应用．     

The effectiveness of post-16 pathways for gaining employment associated with undergraduate degree study

This article sets out to examine the effectiveness of five different post-16 study pathways and the impact that spending time away from education has on gaining employment associated with an undergraduate degree. It also explores advice and guidance for students looking at post-16 study options, higher education and employment. An initial online survey was used, followed by case studies to form a mixed-method approach. The findings suggest that a vocational pathway better prepares students for making decisions around employment and study in comparison to the more traditional A Level pathway. They also highlight that a period of one to four years after finishing post-16 study and starting undergraduate degree study is the most effective for students to gain employment associated with their undergraduate degree. Finally, it was found that most participants did not have positive experiences with advice and guidance regardless of their pathway.     

Three dimensions of equity of access to higher education

Concerns over equity of access to higher education are widespread, but there is significant disagreement over what should constitute a fair system. This article assesses diverse conceptualisations of equity and explores the ways in which they embody themselves in the policies of three systems, those of England, Brazil and Kenya. While showing significant disparities of income level and enrolment ratio, all three have made concerted efforts to expand higher education access, accompanied by increasing stratification in terms of the quality and prestige of institutions. Analysis of policy options and outcomes leads to a proposal of three principles for understanding equity of access: availability, accessibility and horizontality. The third of these principles addresses the little-acknowledged safeguard that disadvantaged students should not be confined to lower-quality institutions, while at the same time allowing for diversity of ethos and disciplinary focus.     

基于无线通信的静止式进相器系统设计

静止式进相器是专为大中型绕线式电机节能降耗设计的无功功率就地补偿装置。现有静止式进相器仅停留在单台电动机和单台静止式进相器的配套使用上,缺乏监控系统、历史数据无法保存。详细介绍了基于无线通信的静止式进相器系统设计,系统由静止式进相器控制子系统和主控子系统组成,使用无线通信模块实现静止式进相器和主控机的通信。主控子系统设计中,采用预约ALOHA实现主控子系统的多址通信。该系统经过实验和现场调试,其结果表明:静止式进相器补偿效果明显,实现系统无线通信功能,满足无线监测的设计要求。     

New Media/Internet Research Topics of the Association of Internet Researchers

This study summarizes prior reviews of new media and Internet research, and the growth of the term Internet in academic publications and online newsgroups. It then uses semantic network analysis to summarize the interests and concepts of an interdisciplinary group of Internet researchers, as represented by session titles and paper titles and abstracts from the 2003 and 2004 Association of Internet Researchers conferences. In both years, the most frequent words appearing in the paper abstracts included Internet, online, community, social, technology, and research. The 2003 papers emphasized topics such as the social analysis/research of online/Internet communication, community, and information, with particular coverage of access, individuals, groups, digital media, culture; role and process in e-organizations; and world development. The 2004 papers emphasized topics such as access; news and social issues; the role of individuals in communities; user-based studies; usage data; and blogs, women, and search policy, among others.     

国内两大开放存取系统的对比研究——奇迹文库和中国预印本服务系统

信息资源的共享对于学术工作者有着重要的意义，本文着重介绍了开放存取运动在中国的实践。深入探讨了中国的两大开放存取系统奇迹文库和中国预印本服务系统，对比两者异同，指出中国两大开放存取系统的优势与尚待完善之处。