求解动态电路初始值的一种新方法

在动态电路中,电路换路后,其初始状态可能发生突变,当一时难以确定时,可用本文给出的一种新方法,即换路后电路利用s域模型,再利用初值定理求解动态电路初始值,并给出几个实例,这种方法适用于各种态电路.     

Mapping a complex system: what influences teacher learning during initial teacher education?

Despite a growing body of knowledge about what content, processes and arrangements for learning may result in more effective initial teacher education, there remains a problem with the variability of outcomes from teacher education programmes. This paper reports on a multi-perspective exploration of what influences learning to teach in valued ways during initial teacher education. Framed by complexity theory, which emphasises the non-linear nature of social phenomena, the paper presents an analysis of 76 maps of influences on learning to teach (made by teacher candidates, teacher educators, mentor teachers and policy makers), looking for differences and patterns that might point the way to explanations about teacher candidates’ varying ability to enact practice that improves outcomes for all learners.     

Examining student teachers’ engagement with the theory-practice link in initial teacher education

The theory-practice debate has been a perennial issue in initial teacher education (ITE). By reporting a mixed-methods study in an ITE programme characterized by a university-based ‘theory-first’ approach in Hong Kong, this study offers useful empirical evidence to analyse the theory-practice issue. 346 student teachers of a BEd Programme participated in the quantitative survey, 15 of whom were interviewed. The quantitative findings showed significant positive correlations between three types of perceived professional competence and two aspects of student teachers’ engagement with the theory-practice link. The qualitative findings offered an in-depth understanding of the ways in which student teachers connected theoretical knowledge learned in ITE coursework and practical experience in ITE fieldwork in developing their professional competence: (1) theoretical knowledge as a guide for professional decisions and a tool for reflection on practice; (2) practicalizing theoretical knowledge: adapting theoretical knowledge to practice situations. In the process of engagement, theoretical knowledge was transformed and adapted to practice situations when student teachers coped with the challenges of the teaching contexts in their ITE fieldwork. While affirming the value of student teachers’ engagement with the theory-practice link, the findings of the study shed light on ITE practices for preparing student teachers for such engagement.     

Narratives of ‘doing,knowing, being and becoming’: examining the impact of an attachment-informed approach within initial teacher education

The Scottish Government’s vision of improving outcomes for children prioritises attachment theory and research in promoting children’s well-being across children’s services. This theme is also noted as increasing international relevance. Our narrative research springs from the experience of designing and delivering the first course within initial teacher education in Scotland to focus on the application of attachment theory to the role and identity of the teacher – particularly, in supporting children vulnerable through experiences of trauma and adversity. We capture students’ ‘real time’ learning moments through reflective journaling during school experience within the analytic ‘Doing, knowing, being and becoming’. Emergent themes include: looking behind and responding to behaviours, making links with ‘lived lives’, understanding teachers’ potential as attachment figures and ‘secure base’, understanding the relevance of adult attachment theory and resilience/self-care to teachers’ emotions and their own attachment experiences.     

Transformations in learning and teaching through Initial Teacher Education

In England, little research has been carried out into how pre‐service secondary English teachers transform what they know as they learn to teach. They are seldom asked to reflect explicitly on the connections between the pedagogy of their undergraduate studies and their pedagogical experiences as student teachers. The initial teacher education committee of the National Association for the Teaching of English decided to explore these connections by asking student teachers on English Postgraduate Certificate in Education (PGCE) courses in five different university departments of education to respond to a series of questions at the start and end of the academic year 2004–2005. The questions fall into four broad areas: student teachers' experiences as learners at undergraduate level and developing ideas about teaching; the nature of the subject English; tensions encountered during the PGCE course; new learning about teaching. The purpose of this article is to discuss some patterns emerging from the research. The most prominent of these is student teachers' realisation that good teaching comes from teachers seeing themselves as learners. We argue that ‘reflexivity’ ( Moore, 2004 ) is a valuable way to help student teachers begin to understand this transformation from learner into learning teacher.     

INITIAL AND BOUNDARY PROBLEMS FOR CERTAIN NONLINEAR DEGENERATR PARABOLIC SYSTEMS

In this paper we are concerned with the following nonlinear degenerate parabolic systems u_t=△x(gradψ(u))+D_xb(u)+f(x.t.u)with Dirichlet boundary conditions,where u,gradψ(u),b and f are vector valued functions and xUnder some structure conditions on the terms of the systems,we have established theresults on existence and uniquence of global solutions of the systems.     

The contribution of non-formal learning in higher education to student teachers’ professional competence

This article reports a mixed methods study on the contribution of various aspects of pre-service student teachers’ learning in initial teacher education (ITE) to their professional competence in a Five-year Bachelor of Education Programme in Hong Kong. Special attention is given to how student teachers’ non-formal learning in higher education contributes to their professional competence, an under-researched area in teacher education. A total of 282 student teachers participated in the quantitative survey, 18 of whom were interviewed. Although  Undergraduate Learning Experience: Formal Learning and Non-formal Learning was not the most highly rated factor, multiple regression indicated that it was the only ITE professional learning factor that significantly predicted all dimensions of professional competence. This supports the hypothesis that non-formal learning as a part of learning in higher education makes a significant contribution to student teachers’ professional competence. The qualitative findings showed that non-formal learning provided opportunities for service learning, co-curricular activities, and student exchange programmes with different objects of engagement. Student teachers constructed pedagogical content knowledge, general pedagogical knowledge, and knowledge of context through hands-on experiences, professional dialogue with practitioners, and observations of others’ practice. Such knowledge contributed to their competence in classroom teaching and to work in schools. Implications for ITE are discussed.     

探析农村教育理想的缺失

农村教育是在最困难的条件下对最迫切需要教育的人口，完成政府及国际社会对人的发展与经济社会可持续发展所提出的教育使命；因而也产生了人们对农村教育的向往和期待。但在这样的教育过程中难免会存在一定问题，与理想的农村教育有一定的距离。认清理想的农村教育及其实际。将会使我们理性、现实地进行农村教育。     

Beginning teachers’ induction in Chile: the perspective of principals

This case study investigated the role of school principals in the induction of beginning teachers in Copiapó, Chile. Building upon group and individual interviews, and review of extant literature, the following findings were established: (a) principals in this study expect beginning teachers to be fully formed as classroom teachers; (b) principals were unlikely to talk about induction practices that might help beginning teachers to learn pedagogical strategies for classrooms; and (c) principals’ induction practices focused on the symbolic role that principals play as the highest authority within the school which has little practical influence on helping beginning teachers to develop their pedagogy. Implications for policy and practice are discussed.     

The Universities and initial teacher education; challenging the discourse of derision. The case of Wales

ABSTRACT

For nearly 40 years the quality and value of the contribution of universities to initial teacher education has been brought into question. This is particularly so in England where the ongoing ‘discourse of derision’ has resulted in universities no longer being seen as necessary partners in the process. More recently, similar challenges have taken place in other countries such as USA and Australia. However in 2013, when the Welsh Government turned its attention to the apparent low quality of its current provision, rather than challenging the role of universities, it chose to strengthen their contribution. There were however to be important changes that insisted that universities put the student teacher learning at the heart of course planning, that universities clarify their own distinctive contribution and that they work in close collaboration with schools. While this approach to initial teacher education is not new, this is the first time that such a model has been implemented on a national scale. This paper outlines the nature, rationale and underlying research for the reforms in Wales. It concludes by speculating on their likely impact in raising the quality of provision and securing the future contribution of universities to teachers’ learning.