基于云计算的在线学习平台的设计与应用

本文将云计算的概念引入到在线学习平台的建设中,提出设计基于云计算的在线学习平台。首先介绍云计算的概念和特点,然后提出一种基于云计算在线学习平台的设计框架,最后实现了一个在线讨论的云计算教育服务平台。     

Integrating functional,social, and psychological determinants to explain online social networking usage

People involved in business are increasingly aware of the online social phenomenon and its potential as a marketing tool. Building upon the marketing, social psychology, and information system literature, this study empirically examines a set of functional determinants derived from the technology acceptance model and socio-psychological determinants drawn from the theory of reasoned action and social cognitive theory that may be responsible for the motivations of participants in online social networks. We propose a model by integrating functional, social, and psychological factors in predicting attitude and online social network usage. The survey outcomes from a cross-sectional study among 387 Facebook users in Malaysia support the hypothesised model. This study contributes by extending the cognitive learning theories in predicting online social networking usage. Particularly, this research presents a different perspective on online social networking by exploring the mediating effect of attitude and the moderating role of individual characteristics. This study demonstrates that desirable changes in the perception of functional benefits, self-efficacy, and need for cognition as well as perceptions of social pressure from significant others might lead to corresponding changes in attitude towards online social networking. Results of the study support the model efficacy and predictive ability of the proposed integrative model which may serve as a theoretical foundation for future researchers interested in examining other virtual community engagements such as blogging, online advertising, and online public relations activities.     

“项目学习共同体”教学模式的探索与实践

针对高职软件技术专业程序设计类课程存在的学生入门难,实际编程能力无法满足企业需求的问题,提出“项目学习共同体”教学模式改革。以Java程序设计课程为例,进行该教学模式的探索及实践。平行班级的教学证明,“项目学习共同体”教学模式能有效提高学生学习兴趣和编程能力,缩短企业工作适应期,更好的满足企业人才需求。     

Impact of virtual atmospherics and functional qualities on the online gambler's experience

This study empirically tests a stimulus–organism–response (S–O–R) structural model that proposes that an online casino's atmospheric cues and functional qualities influence individuals' affective and cognitive responses, which in turn impact consumer behavioural intentions. Using self-reported data from a primarily US-based sample, analysed elements of the online gambling site stimulus included high and low task-relevant cues, financial trust, and gambling value. Demographic characteristics were found to moderate the relationship between the stimulus and internal satisfaction, with demographic group differences found among all stimulus constructs. Results emphasise the significant role that atmospherics and functional qualities play in generating positive behaviours from online gamblers, with additional implications in marketplace competitiveness and in responsible gambling practices.     

基于四端E-SOP的有源配电网运行效率优化

柔性软开关SOPs(soft open points)通过准确控制换流器有功功率交换,提供了现有配电自动化体系所不具备的实时精细潮流调节优化能力。为了解决SOP对有源配电网运行效率的优化成效问题,本文首先建立了带有储能装置的四端SOP即E-SOP(SOP with energy storage)的接入拓扑和数学模型,考虑了四端E-SOP换流器和直流侧储能装置的运行约束。其次,建立了基于四端E-SOP的有源配电网运行效率优化模型。然后,利用半定规划方法对模型进行了线性化求解。最后,通过算例验证了所提方法的有效性和实用性。     

基于OPC技术的流量仪表在线补偿系统

为了提高传统流量仪表的测量准确性和抗干扰能力,本文设计了基于OPC技术的流量仪表在线补偿系统.采用OPC技术实现在线补偿算法单元与实时监测补偿系统的实时通讯,通过计算后的补偿值在实时监测补偿系统上显示,从而使流量测量更加准确,而且便于维护.     

大型深凹露天矿高效运输系统综合技术研究

运输占大型露天矿生产总成本的50％左右，传统的汽车、铁路及其联合运输方式已不能适应深凹露天矿的运输要求，汽车一胶带半连续运输工艺是深凹露天矿最有发展前途的运输方式之一。本文以水厂铁矿为依托工程，研究了汽车-胶带半连续运输系统的设备选型及最佳配套技术、运输线路布设优化、胶带排土工艺及参数优化、系统可靠性分析、坑内单线陡坡联络道技术及系统高效运行保障技术等。分析了水厂铁矿建立-套汽车-胶带矿石运输系统和两套汽车-胶带排岩运输系统后可获得的经济效益。     

爆破机理的推墙假说研究

在长期的露天矿台阶爆破实践中，发现前排孔抵抗线过小是爆破产生极底的主要原因之一。作者在几个基本命题的基础上，提出了爆破机理的推墙假说，及以此为理论基础的前排孔加密爆破技术，推墙假说认为，两孔间的贯穿是两孔中炸药的爆炸力向自由面合推墙效应的结果，且要求岩墙厚度适度，均匀，有充足的补偿空间，且施力均衡。而大区微差爆破则是把一堵厚岩墙分成若干个薄岩墙，然后分别推倒，所以，微差挤压爆破不如前排孔退后且加密。还指出前排孔加密爆破技术应采用三角形布孔，排间起爆，以便达到合推的效果。     

浅析钢包引流砂的填充方式

为了防止钢包水口处钢水冻结,需要在水口处填充引流砂. 引流砂的材质、粒度,水口座砖的形状,连铸工艺等都影响着引流砂的自开率,引流砂的填充效果也是影响因素之一. 介绍了几种引流砂的充填方式,并对其做了对比.     

开放式分布处理--TMN的进一步发展

ＴＭＮ为复杂的电信网络管理规范了开放的、标准化的管理框架，是当代电信技术和计算机技术相互渗透和融合的产物，在ＴＭＮ的进一步发展中，开放式分布管理结构正显示出愈来愈强大的生命力，无疑将成为未来网络管理的发展趋势。