基于复杂网络方法的远程教育网站实证研究

目前我国远程教育网站存在资源数量多,但内容联系不够紧密、信息搜索耗时长、信息的安全性与网站的稳定性较差等问题。复杂网络研究可以通过实证方法度量网络的结构特征和形成规则．进而预测网络系统的行为。中关远程教育网站经复杂网络方法实证分析发现：远程教育网站的建设要有统一的规划,要注意信息的排布、层次结构的架构以及内容的联系,提高信息的利用率,并建立有效的病毒防护和故障排除机制。利用复杂网络的链路预测方法和免疫策略还可以在远程教育网站中实现推荐机制和病毒防护。     

云南城市化进程与产业结构演变的实证研究——基于VAR模型的动态效应分析

利用1978年——2008年云南的统计数据,运用向量自回归模型进行实证研究,其结果表明：云南省城市化水平与产业结构之间存在长期的动态均衡关系;就业结构的调整对城市化进程的作用强于产值结构变化对城市化进程的作用;城市化进程对产值结构变化影响较小,而就业结构对产值结构的影响较大;城市化进程和产值结构变化对就业结构的影响是逐渐加强的。因此,科学规划与发展、调整和优化产业结构,有利于产业结构、就业结构和城市化推进之间的良性互动。     

The Effectiveness of the Responsive Teaching Parent-mediated Developmental Intervention Programme in Turkey: A pilot study

The case study was conducted to examine the feasibility of an early intervention curriculum called Responsive Teaching with two five-year-old children from Turkey who had significant developmental delays. This study determined whether Turkish mothers might be successful in learning to become more responsive to their children, and whether this would result in significant improvements in their children’s development. Both dyads received 28 individual parent–child intervention sessions which were conducted over a four-month period of time. Pre-, mid-, and post-assessments indicated improvements in the mothers’ responsiveness to their children and the children’s levels of engagement with their parents. There were also improvements in the children’s language and personal social development. Mothers reported that Responsive Teaching helped them learn to interact more effectively with their children and that this resulted in longer and more enjoyable interactions with them. Results from this investigation are discussed in terms of their implications for providing developmental services to preschool-aged children with disabilities in Turkey.     

复超球上Schwarz引理的推广及应用

本文研究了经典的Schwarz引理在复超球上的推广并由此建立了复单位球的Poincar(?)度量。此外还给出了它们在多元复分析中的若干应用。     

Does Fidelity of Implementation Account for Changes in Teacher–Child Interactions in a Randomized Controlled Trial of Banking Time?

This study examined fidelity of implementation in a randomized trial of Banking Time, a classroom-based intervention intended to improve children's behavior, specifically for those at risk for developing externalizing behavior problems, through improving the quality of teacher–child interactions. The study sample comes from a randomized controlled trial that took place over three years and included 183 teachers and 470 preschool children recruited across three sites. Results exploring fidelity of implementation indicated that Banking Time practices were present across treatment and nontreatment groups. In addition, the presence of more Positive Banking Time Practices accounted for improvements in teacher–child interactions while Restricted Banking Time Practices showed inconsistent patterns, relating both to positive and negative teacher–child interactions. Further, random assignment to Banking Time resulted in the presence of more Positive Banking Time Practices and fewer Restricted Banking Time Practices, which accounted for the improved teacher–child interactions. Thus, findings point to the critical need to better account for intervention fidelity across conditions in randomized trials, allowing for better understanding of the mechanism through which interventions lead to intended outcomes.     

旅游市场价格竞争的产业特征与市场结构优化

随着我国旅游产业的不断发展，上个世纪90年代后期旅游市场出现供过于求的局面，买方市场开始出现，价格竞争逐渐成为许多旅游企业主动或被动频繁使用的策略。我们根据西方产业组织理论中的产业市场结构和企业行为的相互作用关系，采用产业组织的行为分析框架，以价格战发生较为频繁的旅游饭店和旅行社行业为例，对旅游企业价格行为进行分析，讨论发生价格竞争的旅游产业特征，以避免恶性价格战的发生。     

Early career teachers’ sense of professional agency in the classroom: associations with turnover intentions and perceived inadequacy in teacher–student interaction

Teachers’ capacity to learn intentionally and responsively in the classroom is particularly vulnerable during the first years in the profession. This study investigated the interrelations between early career teachers’ turnover intentions, perceived inadequacy in teacher–student interaction, and sense of professional agency in the classroom. The survey data were collected from 284 in-service teachers with not more than 5 years of experience and analysed by structural equation modelling (SEM). The results showed that the negative relation between turnover intentions and early career teachers’ sense of professional agency was completely mediated by perceived inadequacy in teacher–student interaction. The results indicate that experiences of insufficient abilities to solve pedagogically and socially challenging student situations have a crucial effect on early career teacher’s capacity for adaptive reflection and active transformation of instruction.     

利用工控组态软件创建电气控制线路动态演示教案的方法

利用工控组态软件创建电气控制线路的原理图,模拟动态演示教案,不但可以直观地表述控制原理,还可以利用工控组态中的编程功能设置故障,使学生能尽快地理解控制线路原理,掌握故障分析和排除的能力。     

Degradation kinetics and mechanisms of phenol in photo-Fenton process

Phenol degradation in photochemically enhanced Fenton process was investigated in this work. UV-VIS spectra of phenol degradation showed the difference between photo-Fenton process and UV/H2O2, which is a typical hydroxyl radical process. A possible pathway diagram for phenol degradation in photo-Fenton process was proposed, and a mathematical model for chemical oxygen demand (COD) removal was developed. Operating parameters such as dosage of H2O2 and ferrous ions, pH, suitable carrier gas were found to impact the removal of COD significantly. The results and analysis of kinetic parameters calculated from the kinetic model showed that complex degradation of phenol was the main pathway for removal of COD; while hydroxyl radicals acted weakly in the photo-Fenton degradation of phenol.