在线考试系统设计     

徐晶 《黑龙江科技信息》2009,(33):69-69

本文论述的在线考试系统是为适应各种考试机构进行在线考试需要而设计的,可实现题库管理、自动组卷、在线考试、自动阅卷、评卷等功能。文中论述了在线考试系统的体系结构、主要功能和相关开发环境。本系统采用B／S结构,即采用耐览器-Web服务器-数据库服务器三层结构。在客户机上无需安装考试应用程序,只需有浏览器即可。  相似文献   

Investments in modernization, innovation and gains in productivity: Evidence from firms in the global paper industry   总被引：1，自引：0，他引：1  

Vivek Ghosal  Usha Nair-Reichert 《Research Policy》2009,38(3):536-547

This paper examines the impact of investments in modernization and innovation on productivity in a sample of firms in the global pulp and paper industry. This industry has traditionally accounted for significant amounts of employment and capital investment in North America and Europe. In contrast to much of the existing literature which focuses on the impact of R&D and patents on firms’ performance and productivity, we examine data on actual investment transactions in four main areas: (i) mechanical, (ii) chemicals, (iii) monitoring devices and (iv) information technology. We find that firms that implemented a greater number of investment transactions in modernization achieved higher productivity, and these estimated quantitative effects are greater than the impact of standard innovation variables such as patents and R&D. Investment transactions in the information technology and digital monitoring devices imparted a particularly noticeable boost to productivity. These results are obtained after controlling for other firm-specific variables such as capital intensity or mergers and acquisitions. Thus, firms’ decisions to undertake investments in modernization and incremental innovations appear to be critical for achieving gains in productivity, compounding to form meaningful differences in performance, productivity and competitive position across firms in the longer run. For some of the traditional industries like pulp and paper, R&D and patents seem to be particularly poor indicators of innovation and, more generally, how firms go about achieving gains in productivity.  相似文献   

Drivers of national innovation in transition: Evidence from a panel of Eastern European countries     

Sorin M.S. Krammer 《Research Policy》2009,38(5):845-192

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Design and development challenges for an E2E DRM content business integration platform     

Antonio  Jos  Vicente 《International Journal of Information Management》2009,29(5):389-396

Current studies on Digital Rights Management (DRM) have focused on controlling access to and copies of contents, centered exclusively on the end of the value chain (end users). This focus has been oriented towards security and encryption as a means of solving the issue of illegal copying by purchasers. In this paper, we propose End-to-End Digital Rights Management (E2E DRM) that involves the protection of the content throughout the entire value chain. This concept is given form in the new technologies for representing intellectual property (IP) which, in a secure and unequivocal manner, identify the content at each point in the value chain: from the author to the end user, the content is identifiable in any of the transactions and statuses through which it passes. The key concept which E2E DRM must provide is not only the governability of access and copying, but also that of all the processes associated with the content business. We establish an E2E DRM model and architecture, and propose the R&D management of its design and implementation that makes it possible to protect content from content creator to purchaser. Finally, the paper also analyzes their impact from a global perspective.  相似文献   

3DSMAX材质设置的一种便捷方法     

卿立兴 《内江科技》2009,30(12):78-78

材质是设计出色彩真实感三维作品的关键,现有的各种教材和教程中却没有能让初学者快速掌握材质设置的方法。本文首先对物体材质的属性进行比较分类,并据此分析设置3DSMAX模型材质的一种便捷方法。  相似文献   

B2B网站易用性评价系统的构建     

张征宇  王然  厉言 《黑龙江科技信息》2009,(34):107-107

在全球信息化大势所趋的影响下,各国的电子商务不断的改进和完善,电子商务成为各个国家乖各大公司争夺的焦点。在我国,计算机与网络技术的普及与发展使电子商务迅速崛起,众多的信息技术企业、风险投资公司、生产流通企业纷纷开展电子商务。  相似文献   

RFID自动识别技术在电力设备检测信息管理中的应用   总被引：2，自引：1，他引：1  

白雪鹏  刘华谱 《科技广场》2009,(3)

本文介绍了RFID自动识别技术在电力设备检测信息管理中的应用.在新的形式下,迫切需要使用便携武RFID电力设备检测信息管理系统进行现场管理、检测和核查操作.RFID电力设备检测信忠管理系统由现场RFID电子标签、数据核查终端、后台服务器端管理系统等组成.本系统适用于电力设备检测管理机构采用智能RFID电子标签对电力设备进行信息化管理.  相似文献   

远程招生系统的设计与应用     

李杰 《科技风》2009,(3)

构建一个与现代远程教育发展相匹配的招生管理平台,将会有效促进现代远程开放教育的发展。应用ASP技术、在B/S模式下设计开发的基于WEB的远程招生系统,对规范开放教育的招生工作具有现实指导意义。  相似文献   

B/S模式下基于RBAC的权限管理系统设计与实现     

许向勇 《科技风》2009,(21)

权限管理是管理信息系统的核心功能之一.本文基于RBAC 型,针对B/S模式的特点,考虑了系统安全性、有效性和灵活性.提出了权限管理系统的设计方案.  相似文献   

基于嵌入式系统的智能家居网关的研究     

高刃  汪成义 《科技创业月刊》2009,22(4)

智能家居系统是利用计算机、嵌入式系统和通信网络技术将各种家用设施(如照明、安防、家电等)连接到一起,从而为人们提供更为便利舒适的生活.在对家庭网络、嵌入式系统深入研究的基础上,对采用s3C4510B微处理器成功开发的嵌入式家庭网关进行了深入的分析,并对搭建智能家居系统进行了模拟与分析.  相似文献