浅谈C语言学习的一些关键环节

C语言是计算机专业学生必修的一门专业基础课,通过阐述其重要性和对其参考书的选择以及对方法、学习建议等的归纳总结,为计算机专业学生学习C语言提供一些指导和帮助。     

基于VB.NET和OPC的玻璃配料控制系统的设计与实现

以某公司玻璃配料控制系统为例,介绍了玻璃配料系统的系统结构、综合上位机和PLC通信的几种方式的特点,阐述了如何使用西门子公司提供的OPC接口和VB.NET实现上位机与西门子S7-200PLC之间的数据交互,通过实际应用,比较分析了OPC技术在监控系统的优势。     

一种集成式多功能计算机辅助教学系统的设计与实现

针对计算机辅助教学软件开发周期长的特点,提出一种资源集成模式的教学系统开发思想。并以VB程序设计课程教学为例,介绍了系统各主要功能模块的作用及其实现的关键技术,还对这种系统的开发思想、作用和适用范围作了简要总结。     

Multiple dimensions of family engagement in early childhood education: Evidence for a short form of the Family Involvement Questionnaire

The primary aim of this study was to develop and validate a short form of the 42-item Family Involvement Questionnaire (FIQ) for use in preschool. Empirical evidence derived from a representative sample of preschool programs in a large city in New York State with the original version of the FIQ was used to select the items for a 21-item short form. A representative sample of 590 Head Start families was also identified from a large Head Start program in Pennsylvania to serve to validate the short form. Confirmatory factor analysis of the short form substantiated the three robust dimensions of family involvement from the original FIQ. Concurrent measures of parental satisfaction and assessments of children's literacy and mathematics skills along with an examination of family demographic variables supported the validity of the confirmed dimensions. Implications for the use of this multidimensional, short form of family involvement in large-scale program evaluation were discussed.     

Evaluating Teacher Education Programs Using a National Survey

Abstract

The authors used the National Survey of Teacher Education Program Graduates, developed by Freeman, Loadman, and Kennedy (1991), to evaluate the baccalaureate and master's of education (M.Ed.) teacher education programs at a major Carnegie I research university. The instrument's 4 measures—acting as proxies for teacher education graduate careers, quality of program, teaching skills, and teaching knowledge satisfaction—were compared with national norms from other teacher education programs across the country. The survey data from the class of 1996, consisting of 263 baccalaureate graduates and 171 M.Ed, graduates, suggested that they were generally very positive about their programs and careers. In general, the baccalaureate and M.Ed. graduate responses on all 4 measures were more alike than different. Both groups of 1996 graduates rated the measures more positively than the national norms.     

基于PLC数值处理模块的PID控制程序研究

为了方便测试先进PID控制算法,依靠PLC数值处理模块,设计完成增量PID控制器程序,在PLC实验模拟对给定值的跟踪,与仿真结果一致。分析程序实现过程,证明浮点数值转换的重要性,设计延时转换条件,解决远程跳步影响数值处理的故障,指出分析PLC程序扫描顺序是解决程序开发错误的有效方向。     

广西与东盟农业弱质性和农产品贸易竞争力研究——农产品贸易对策思考

基于“旱期收获计划”对广西农业发展的影响以及广西农产品出口面临的问题,探讨了发展广西与东盟农产品贸易的对策,研究表明,促进广西与东盟农产品贸易进一步发展的关键是加强政府的宏观调控作用和从微观上提升农产品的出口竞争力。     

课件制作中插接Flash动画的方法

利用ActiveX控件或包以及启动程序/打开文档等工具,可以在PowerPoint、方正奥思、 Authorware中插接Flash动画.实践证明这些插接Flash动画的方法是切实可行的.     

Promoting students’ social behavior in primary education through Success for All lessons

Success for All (SfA) is a comprehensive school reform program with a strong emphasis on cooperative learning that aims to improve students’ social emotional learning alongside students’ cognitive learning. In the present study it was examined whether SfA led to improved students’ social behavior in Grade 1–3 of primary education. Peer sociometric data was collected for 974 students aged 6–9. Using multivariate multilevel analysis we found no significant effect of SfA on students’ pro- and antisocial behavior over time. However, a significant interaction effect was found showing that antisocial behavior of students from disadvantaged backgrounds decreased in the intervention condition in Grade 2. This is a promising finding given that the SfA program was especially developed for schools serving large numbers of disadvantaged students. Implications of the study are described.     

用好养好黑土地的科技战略思考与实施路径——中国科学院“黑土粮仓”战略性先导科技专项的总体思路与实施方案

"黑土地保护与利用科技创新工程(黑土粮仓)"战略性先导科技专项(A类)是中国科学院实施"黑土粮仓"科技会战,深入贯彻落实习近平总书记关于"把黑土地用好养好"系列指示精神的核心抓手。该专项立足国家粮食安全战略目标,针对东北黑土地保护与利用面临的关键科学技术难题,根据问题导向、创新引领和示范带动的思路,以"目标清、可考核、用得上、有影响、推得开、留得下"为原则,开展黑土地保护与利用的核心技术攻关和区域适宜性模式示范,致力于形成用好养好黑土地的系统解决方案,服务国家粮食安全产业带建设和现代农业发展。