双CPU在控制系统中的应用

从最简单的硬件和软件设计角度分析双CPU在多I／O应用系统中的实施方法，讨论了双CPU系统的可靠性和灵活性。     

Social network analysis of international student mobility: uncovering the rise of regional hubs

Research on the patterns of international student mobility and the dynamics shaping these patterns has been dominated by studies reflecting a Western orientation, discourse, and understanding. Considering political, economic, cultural, historical, and ecological factors, this study argues that international student mobility is not only an issue of the economically developed, politically stable, and academically advanced Western world but also one that involves countries with different economic, political, and academic characteristics. Taking into account various theoretical orientations, this study argues that political, economic, cultural, and historical factors have led to the emergence of non-traditional destinations for international students; these countries are labeled as emergent regional hubs. In order to empirically test this, a social network analysis was conducted on a worldwide dataset representing 229 countries. The findings evidenced the strong position of traditional destinations for international students. However, the results also suggest the rise of several regional hubs, which are undergoing internationalization processes in different forms and with different rationales. The mobility patterns in emerging regional hubs deviate from those in traditional destinations, which fundamentally change the nature of internationalization in this context.     

Concurrent and longitudinal predictors of calculation skills in preschoolers

Early calculation abilities in preschoolers are predictive of mathematics achievement in subsequent grades (e.g., Jordan et al. 2009). Two studies were conducted to evaluate concurrent and longitudinal predictors of early calculation skills. In the first study, 102 preschoolers (57.8 % female; mean age?=?60.57?±?8.66 months) were given vocabulary, language comprehension, and verbal working memory tasks and a test battery that evaluated components of early number competence (quantity comparison, counting, number line, size seriation, semantic knowledge of digits, visual-spatial memory). The children were also asked to complete early calculation tasks, including addition and subtraction calculations. The results of this task constituted the dependent variable. The results showed that vocabulary, size seriation, and visual-spatial memory were significant concurrent predictors of early calculation competence. In the second study, 43 children completed the early number competence battery at time 1 (53.5 % female; mean age?=?59.30?±?3.46 months) and the linguistic and early calculation tasks at time 2, about 10 months later (mean age?=?69.43?±?3.31 months). The analysis of the longitudinal predictors of early calculation showed significant effects for counting and size seriation. The implications for preschool assessment and intervention are discussed.     

以"三个代表"重要思想为指导 努力做好高校党建工作

高等学校具有人才、科学技术和文化等优势,是认识未知世界、探求客观真理的前沿,是知识创新、科技创新和推动科学技术成果向现实生产力转化的重要力量,是学习、研究和宣传马克思主义理论的重要基地,是中华民族优秀文化与世界先进文化成果交流的桥梁,是社会主义精神文明建设和理论创新的示范区和辐射源,是培养服务于人民和社会的高素质创新型人才的摇篮。能否完成时代赋予高校的神圣历史使命,关键在于按照"三个代表"重要思想的要求,把党建设好。     

Preservice teachers’ use of contrasting cases in mathematics instruction

Drawing comparisons between students’ alternative solution strategies to a single mathematics problem is a powerful yet challenging instructional practice. We examined 80 preservice teachers’ when asked to design a short lesson when given a problem and two student solutions—one correct and one incorrect. These micro-teaching events were videotaped and coded, revealing that fewer than half of participants (43%) made any explicit comparison or contrasts between the two solution strategies. Those who did were still not likely to use additional support strategies to draw students’ attention to key elements of the comparison. Further, correlations suggest that participants’ mathematical content knowledge may be related to whether participants’ showed contrasting cases but not to whether they used specific pedagogical cues to support those comparisons. While these micro-teaching events differ from the interactive constraints of a classroom, they reveal that participants did not immediately orient toward differing student solutions as a discussion opportunity, and that future instruction on contrasting cases must highlight the utility of this practice.     

加强实践环节的铁路线路课程设计探索

线路课程设计是一门综合运用理论和专业知识的实践课程,对工程实际经验依赖性很强。本文分析了目前铁道工程线路课程设计培养现状,论述了加强实践环节的必要性,并开展了加强赴现场模拟踏勘、邀请线路设计专家入校讲解等尝试,以期为类似实践性较强的课程设计提供参考。     

Web环境下教学资源最优化研究

网络教学资源的现代模式 从现有网络教学资源的情况来看,其模式主要有以下几种: 1.专业教师个人或若干教师组合的"单一作战"模式。 这种模式往往建立在他们的个人爱好和兴趣上,这就会造成有的专业教师因受到自身计算机水平的限制,不能让     

计算机与幼儿园课程的整合

本文主要探讨了计算机整合于幼儿园课程的几个问题，包括怎样理解计算机整合于幼儿因课程的含义，将计算机整合于幼儿因课程的意义，以及整合的具体方式，并对整合过程中遇到的问题如教师自身的计算机基础、软件在课程整合中的作用等问题进行了简要探讨。     

高一物理与初中物理衔接教学的探讨

高一物理教学中，与初中物理衔接教学是一个重点。为此，我进行了一些探索：教学内容方面，注意循序渐进，加强初中、高中物理知识的衔接；教学方法方面，注意发挥学生的主体作用，引导学生掌握学法；注重非智力因素的优化。