一类连续控制SI模型的动力学分析

建立并研究了一类连续释放害虫策略的SI模型,讨论了SI模型边界平衡点的存在性和局部稳定性,证明了系统在一定条件下存在唯一的全局渐进稳定的正平衡点．最后通过数值模拟进行了验证．     

高考改革更关注对教学的积极导向

考试可能有负面作用,也可以产生积极的影响,关键在于考试设计的指导思想。考试的形式和命题的取向主宰着教与学的模式。我国著名的考试问题研究专家桂诗春教授就曾指出,题型不变化,考试这把"刀"就"钝化"了,而要使之变得锋利,就要注意经常变换题型。新课程改革实验区高考英语试卷的变化,凸现了对学生分析、推理、概括和表达等较高层次能力的考查;题型的变化为广大教师深入领悟和实践高中英语新课程标准做出了正面引领的作用。     

Teacher support and academic engagement among EFL learners: The role of positive academic emotions

Academic engagement and teacher support, as two important factors in education, have been largely neglected in the research literature of English as a Foreign Language (EFL) and applied linguistics. Given the facilitative role of positive emotions in learning processes, this study aimed to examine their mediating role in the relationship between teacher support and academic engagement among Iranian EFL learners. The participants were 435 EFL freshmen randomly selected via multi-stage cluster sampling. The data were collected through previously validated measures. The results of structural equation modelling showed that perceived teacher support could directly and positively affect academic engagement. Additionally, positive emotions mediated the relationship between teacher support and academic engagement. Finally, some important implications and suggestions for further research are presented.     

论在全民健身中健美操的价值

根据健美操的特点,论述了健美操的锻炼价值和在全民健身中的地位与作用,认为:健美操是一项多功能、高价值及人们喜爱的体育运动项目,易于开展和推广,是落实“全民健身计划”的好内容和好形式.     

我国国内旅游经济实证分析

在对旅游业的大量定性分析的基础上,通过建模进行了实证分析,构造系统综合功能指数,寻求制约我国国内旅游业发展的病症所在,并有针对性的提出相关对策。     

The conundrum of low achievement and feedback for learning

Abstract

The literature on improving student engagement with assessment and feedback has a tendency to treat all students as if they are the same. Students with lower levels of attainment are generally under-represented within empirical studies and their feedback behaviours are less well understood. The recent drive to improve student assessment and feedback literacy and the move from ‘feedback’ being information about a task to being a process of understanding and using performance information is a larger conceptual leap for some students than others. In this paper, we consider issues surrounding the transition to new modes of feedback, focussing on what is needed for those who find study difficult and persistently are disappointed by their levels of attainment, to benefit from and take advantage of our feedback pedagogies. We examine literature advocating strategies such as increasing agency, using praise, developing feedback literacy and cultivating a growth mind-set. We argue that students who underachieve may benefit from strong relationships with educators and peers, exposure to feedback rich, low stakes environments, which permit repeated integrations of practice and feedback, and building feedback literacy through peer assessment activities.     

略论我国民事时效制度的完善

本对现存时效制度的缺陷作了一些分析，并提出了完善时效制度的粗浅看法，以期消除人们对时效制度的误解，从而更好地保护民事主体的民事权利。     

多元函数的极值及其应用

在多元函数极值有关理论的基础上，讨论多元函数求解极值的理论方法，并通过典型例题阐明多元函数极值在实践中的应用。     

流动人口对新疆社会经济的积极作用

大量流动人口来到新疆,冲破了地域、民族的界限,扩大了各民族交往的范围和领域,推动了新疆社会经济的发展。流动人口带来了新的信息和技术,改变了新疆本地的传统观念,对新疆民族文化的传播和发展也起到了一定的积极作用。人口流动促进了各地不同民族间的接触交流,改变了人们狭隘的地域观念。通过人口的流动,不同民族间的社会交往增加、经济联系加强,同时也促进了民族间的文化认同和变迁。     

Self-regulatory climate: A positive attribute of public schools

This study contributes to the development of a positive framework for effective public schools in 2 ways. First, it advances the construct self-regulatory climate as consisting of 3 generative school norms—collective faculty trust in students, collective student trust in teachers, and student-perceived academic emphasis. The authors argue these norms signal a school climate supportive of student psychological needs. Second, they test the predictive validity of self-regulatory climate by empirically examining its relationship with school performance. Results of structural equation modeling support the theory that collective faculty trust in students, collective student trust in teachers, and student-perceived academic emphasis combine to form a self-regulatory climate that has positive consequences for urban school performance.