基于联机数据挖掘技术的高校招生分析系统的设计与实现

以高校招生信息平台为研究对象,分析了传统的C/S模式下招生信息数据挖掘的局限性,引入OLAM概念,提出了基于SQL Server 2005的DMX和MSChart实现高校招生数据在线分析处理,并给出具体实现,从而使招生数据分析处理摆脱了只能在客户端进行的限制。     

基于Servlet3.0的Web异步处理的研究

随着互联网应用不断发展,用户体验的不断提升要求能够在很多场景尽量减少交互延时,传统Web请求同步模式不能满足高并发需求,异步模式提出。本文通过分析Web请求同步模式和异步模式的工作原理,归纳了Web异步请求的两种处理场景,对比Tomcat、Jet-ty、Servlet3提供的异步处理实现,分析了Servlet3异步模式的优势,设计了基于Servlet3的web异步请求模型,为互联网B/S实时应用开发者提供了参考。     

移动终端远程数据访问技术设计与实现

随着移动终端设备的普及,提出了传统的Web应用向移动终端拓展的需求。介绍了现有B/S架构模式下,在Web应用服务端为移动终端应用设计专用数据接口,通过HTTP请求访问远程数据库,利用JSON格式进行数据传输的解决方案。最后通过设计iOS实例具体介绍了移动终端应用远程数据访问的实现。     

基于JavaEE多层软件架构的研究与实现

为了改进传统C/S模式的图书管理系统,采用基于JavaEE的struts2.0＋spring＋hibernate三层软件架构实现B/S模型并对其进行研究和探索,初步设计了一个轻量级的具有通用性的软件架构模型。     

基于"B/S+C/S"混合模式的煤炭生产信息系统的设计与实现

本文分析了C/S与B/S两种模式的优缺点,综合考虑C/S模式在信息管理、办公自动化等事务处理和B/S模式在信息浏览、查询和发布方面的优势,本文介绍了采用C/S模式和B/S模式相结合的混合模式开发煤炭生产信息系统的设计和实现过程。     

经管类实验室实验日志管理模式探讨

本文从经济管理类实验室管理的角度出发,探讨了传统手工实验日志管理模式、B/S实验日志系统管理模式和C/S实验日志系统管理模式的优缺点,详细介绍了基于C/S模式的实验日志管理系统的设计,并实现了在数字化校园背景下的统一身份认证,实现了与学分制教学管理系统的对接。     

Java Socket实现C/S网络通信

本文阐述了使用JAVASDK提供API之一Socket来完成对基于C/S模式的应用编写网络通信程序。具体介绍了Socket传输模式和工作的机制,输入输出流,C/S通信的实现,并最后总结了应该注意的事项。     

基于C／S和B／S的施工图审查信息系统

结合一个实际项目介绍了基于C／S和B／S的建设工程施工图审查信息系统的设计与实现,具体讨论了系统的结构设计与系统功能划分,以及在实现过程中涉及的关键技术。     

网络环境下英语语音在线自动评改系统设计

网络环境下,现有的评改系统在进行数据运算过程中容易出现服务器过载现象,且数据库更新不及时,导致无法及时有效的评改和反馈,致使学生对英语语音学习和修改的积极性不高,成绩没有得到大幅度提升。研究设计了一种基于C/S模式和B/S模式相结合的在线自动评改系统,对系统的功能需求进行设计;系统实施方案设计采用C/S模式实现评改,并添加了B/S模式,给出了B/S模式的结构设计和工作原理图,具有网络资源利用率高,能协调服务器两端工作,避免了传统评改系统服务器过载的问题,且兼顾灵活部署和更新便捷的优点。给出了系统的具体实现方案,进行了系统的数据库设计,改善了传统方法数据库更新不及时的缺点,同时设计了系统登录界面和测试界面。实验结果表明,该系统的设计实现,能够实现及时的评改和反馈;能够获得较为真实的反应测试对象的英语语音真实能力值,可以有效提高学生的英语语音测试成绩。     

基于.NET的文化资源共享管理系统的设计

根据文化信息资源共享的需要,分析介绍了基于.NET的C/S、B/S混合模式的实现原理和技术,提出了一种基于.NET的C/S、B/S混合模式文化资源共享管理系统的设计方法和实现技术,介绍了其功能设计和关键技术。     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

To serve and promote science development via innovation

CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

Tracing the origin and early radiation of birds——Paleornithologist ZHOU Zhonghe

With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants."     

The Information Environment and Universal Service

This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.