语言变量及其"值"的相关概念和符号使用字体探讨

针对语言变量这个使用日渐频繁的科技术语,分析语言变量的内涵及其与物理量的区别,并举例说明;通过比较研究,认为应正确掌握语言变量及其"值"的相关概念和符号字体使用.提出了相关观点和建议.     

The effect of teacher education programs on future elementary mathematics teachers’ knowledge: a five-country analysis using TEDS-M data

This article addresses the problem of how opportunities to learn in teacher education programs influence future elementary mathematics teachers’ knowledge. This study used data collected for the Teacher Education and Development Study in Mathematics (TEDS-M). TEDS-M measured the mathematics content knowledge (MCK) and the mathematics pedagogical content knowledge (MPCK) of future teachers in their final year in teacher preparation programs. The purpose of this study is to explore whether elementary teaching candidates’ MCK and MPCK are associated with their opportunities to learn in mathematics courses and mathematics methods courses in five countries. The results showed that opportunities to learn in some teacher preparation components are more important than in other components.     

EPR-RCGA-based modelling of compression index and RMSE-AIC-BIC-based model selection for Chinese marine clays and their engineering application

The compression index is a key parameter in the field of soft clay engineering. In this paper, we propose an improved method for correlating the compression index with the physical properties of intact Chinese marine clays that are involved in many construction projects in coastal regions in China. First, the compression index and some common physical properties of clays from 21 regions along the Chinese coast are extracted from the literature. Then, a basic regression analysis for the compression index using the natural water content and Atterberg limits is conducted. To improve the correlation performance, an evolutionary polynomial regression (EPR) and real coded genetic algorithm (RCGA) combined technique is adopted to formulate different equations involving different numbers of variables. An optimal correlation using only natural water content and liquid limit as input parameters is finally selected according to the root mean square error (RMSE), Akaike’s information criterion (AIC), and Bayesian information criterion (BIC). The proposed correlation is evaluated and shown to perform better than existing empirical correlations in predicting the compression index for all selected Chinese marine clays. This correlation is validated to be reliable and applicable to engineering applications through the prediction of the properties of an embankment on the southeast coast of China using finite element method. All comparisons show that the EPR and RCGA combined technique is powerful for correlating the compression index with the physical properties of the clay, and that model selection by RMSE, AIC, and BIC is effective. The proposed correlation could be used to update current formulations, and is applicable to engineering design in coastal regions of China.     

减灾与救灾──地震灾害的快速评估及其综合决策

建议借助于现代管理手段，建立我国的地震灾害快速评估和综合决策系统，以利于提高减灾与救灾的快速反应能力。     

东莞地区图书馆与社会阅读调查报告

东莞地区图书馆与社会阅读调查项目是由中国图书馆学会图书馆与社会阅读委员会和东莞图书馆联合组成的调研组,针对东莞地区社会阅读状况而开展的调查和评估工作。项目通过文献调研、抽样分析、问卷设计以及在东莞市各镇街展开的全面调查,而获得了大量一手的数据,较全面地展现了东莞地区社会阅读的全貌,本报告对调查数据进行了统计分析,以期为其他城市开展社会阅读活动提供可资借鉴的案例。     

我国惠农信息推送现状及对策

我国农村地区由于信息不对称、经济基础薄弱、基础设施投入不足、人员信息素养不高等诸多因素,使得惠农信息的推送没有达到实际的预期效益。文章在实践调研的基础上,对我国惠农信息推送现状进行分析,并针对当前存在的一些问题提出基于电子政务平台的惠农信息推送服务模式,最后提出基于电子政务模式的惠农信息推送服务的开展方法和策略。     

高职电子商务专业实践教学的柔性化设计

在高职教育改革创新中,应通过对实践教学的柔性化设计,来实现对人才培养对象因材施教,进行“精细化”培养是十分重要的内容。本文以电子商务专业为例探讨了实践教学的柔性化设计、实施及需注意的问题。     

AT89C51单片机在霓虹灯控制中的应用

霓虹灯控制器由于应用广,故追求较高的性价比。由AT89C51单片机结合双向晶闸管输出型的光电耦合器MOC3021来实现的控制器功能,时间常数易修改,使用灵活,电路易实现,成本低,控制芯片更换方便。     

理念创新推进图书馆事业发展

论述了图书馆界近几年理念创新对于推进图书馆事业发展的重要作用。     

‘Social Skills’: Following a Travelling Concept from American Academic Discourse to Contemporary Danish Welfare Institutions

The article traces the origin and development of the concept of social skills in first and foremost American academic discourse. As soon as the concept of social skills was coined, the concern for people lacking such skills started and has been on the increase ever since (now sharing public attention with related concepts such as self-control, emotional intelligence and empathy). After the analysis of the academic history of the concept follows an examination of the implementation of a range of assessment instruments and training programmes related to social skills (and lack hereof) in contemporary Danish welfare institutions (more specifically, day nurseries and schools, employment and penal services). The analysis forwarded in the article thus demonstrates how an intellectual idea may develop and travel - and on its journey connect to pre-existing cultural logics and societal concerns. The idea of social skills has through its development been made uncontroversial – everybody wants to be skilful. The concept does, however, convey an individualistic view on social life and imposes a reflexivity over own performance on the participants. Further, its normative character contributes to a problematization of those who are perceived to lack these skills.