中国碳排放强度影响因素的动态效应分析   总被引：2，自引：0，他引：2  

刘广为  赵涛 《资源科学》2012,34(11):2106-2114

近年来国内外对碳排放与碳排放强度的因素分解研究,大部分集中在影响因素个体的贡献程度上,而对于影响因素的稳定性及其对碳排放或碳排放强度变化的动态冲击效应方面,缺乏相应的深入研究。本文采用Kaya恒等式的改进模型,对碳排放强度进行因素分解,得到碳排放因子、能源强度、能源结构与产业结构四个影响因素。以1980年-2009年国内的各项相关数据为基础数据,对能源强度、能源结构与产业结构与碳排放强度的相关性进行平稳性检验,并对碳排放强度与能源强度、能源结构、产业结构进行整体协整检验,检验通过后运用脉冲响应函数分析三种影像因素的变化对碳排放强度的冲击效应;利用SVAR模型中的方差分解功能,计算三种影响因素对碳排放强度的贡献度,结果显示能源结构对碳排放强度的冲击效应最弱,能源强度稍强,第三产业比重效果最为显著。  相似文献   

走出困境:中学教育研究的路径选择     

王昌平 《四川职业技术学院学报》2010,20(1):65-66

中学教育研究要根据教育的实践本性,意识到当前教育研究在理论研究、实践研究和方法论研究方面的困境,用生成性思维深入探究新课改中为什么教、怎样教和怎样评的问题,在实践研究中建构新课程的教学模式.  相似文献   

Parental experiences of dealing with disputes in Additional Support Needs in Scotland: why are parents not engaging with mediation?     

Kevin Wright  Joan Stead  Sheila Riddell  Elisabet Weedon 《International Journal of Inclusive Education》2013,17(11):1099-1114

Partnerships with parents, particularly in the field of education, have featured prominently in policy rhetoric for many years, but routes of redress have not had much attention until relatively recently. The development of Alternative Dispute Resolution in the UK reflects the situation in several jurisdictions (e.g. Norway, Germany, the Netherlands) where citizens can choose not to go to court to resolve administrative disputes. Under the Education (Additional Support for Learning [ASL]) (Scotland) Act 2004 local authorities must establish and publicise procedures for identifying and meeting the needs of children requiring additional support for learning. The Act and Code of Practice advocate early intervention to prevent disagreements about the provision for additional support from escalating into more serious disputes, with local authorities required to provide information about, and access to, independent mediation for parents. In Scotland the ASL Act 2004 has resulted in four routes available for redress in the area of Additional Support Needs which include both mediation and litigation type processes: ? Informal mediation

? Formal mediation

? Adjudication

? Tribunal

This article uses case study information from parents in three local authorities in Scotland to explore why independent mediation is being under-used by schools and parents, and what factors influence this. Questions are raised regarding the large numbers of parents who are unaware of mediation, the attitudes towards and use of independent mediation by local authorities and the suitability of independent mediation, particularly when the dispute is over resources.  相似文献   

The reality of living with AD/HD: children's concern about educational and medical support     

Lesley Hughes 《Emotional and Behavioural Difficulties》2013,18(1):69-80

A diagnosis of AD/HD may tell us that the child has the core characteristics of inattentiveness, impulsivity and or hyperactivity, but it fails to convey the extent to which the social context of the child's environment manipulates these characteristics. This article reports on how children with a diagnosis of AD/HD view the impact their social environment has on their behaviour; providing us with insight into how educational and medical intervention strategies are failing to achieve their potential. The findings suggest that if children with AD/HD and their families are to benefit from educational and medical intervention then stakeholders need to work together to provide coordinated and consistent support.  相似文献   

Adventure education and resilience: The double-edged sword     

James T. Neill  Katica L. Dias 《Journal of Adventure Education & Outdoor Learning》2013,13(2):35-42

Abstract

Adventure education philosophers have argued that controlled exposure to challenge can enhance participants' psychological resilience. This study supports this claim, demonstrating significantly greater gains in psychological resilience for 41 young adults participating in 22-day Outward Bound programs than in a control group. All Outward Bound participants reported positive changes in their resilience and their overall change effect size was large. Perceived levels of social support predicted 24% of the variance in resilience gain scores, with participants' ratings of the least supportive group member being the best predictor. The findings for enhanced resilience and the important role of social support warrant wider investigation. In promoting psychological resilience adventure educators are alerted to the importance of facilitating positive interpersonal relations and minimising the detrimental impact of the diverse needs of group members.  相似文献   

Using Excel for White's Test—An Important Technique for Evaluating the Equality of Variance Assumption and Model Specification in a Regression Analysis     

Mark L. Berenson 《Decision Sciences Journal of Innovative Education》2013,11(3):243-262

There is consensus in the statistical literature that severe departures from its assumptions invalidate the use of regression modeling for purposes of inference. The assumptions of regression modeling are usually evaluated subjectively through visual, graphic displays in a residual analysis but such an approach, taken alone, may be insufficient for assessing the appropriateness of the fitted model. Here, an easy‐to‐use test of the assumption of equal variance (i.e., homoscedasticity) as well as model specification is provided. Given the importance of the equal‐variance assumption (i.e., if uncorrected, severe violations preclude the use of statistical inference and moderate violations result in a loss of statistical power) and given the fact that, if uncorrected, a misspecified or underspecified model could invalidate an entire study, the test developed by Halbert White in 1980 is recommended for supplementing a graphic residual analysis when teaching regression modeling to business students at both the undergraduate and graduate levels. Using this confirmatory approach to supplement a traditional residual analysis has value because students often find that graphic displays are too subjective for determining what constitutes severe from moderate departures from the equal variance assumption or for assessing patterns in plots that might indicate model misspecification or underspecification.  相似文献   

A study of the difficulties of care and support in new university teachers’ work     

Caroline Walker  Alan Gleaves  John Grey 《Teachers and Teaching》2013,19(3):347-363

This paper discusses some findings from a small‐scale qualitative study involving ‘new’ teachers in a medium sized, regional English university. Using Grounded Theory methods to inform and guide the research, the study explores participants’ views on working as both teachers and researchers whilst also managing considerable amounts of ‘caring work’ with a diverse body of students who often need academic and pastoral support in excess of that assumed within the university academic timetables or support networks. The voices of these teachers suggest that care is an overlooked aspect of university teachers’ work, yet it plays an important part in maintaining their and their students’ sense of scholarly endeavour. Further, our findings suggest that within the university at large there is a ‘discourse of difference’ in the way that many academics conceptualize and represent the student body and students’ needs to be supported. This discourse impacts on the development of new teachers’ identities and aspirations. Some implications of these findings for implementing strategies for supporting teachers to develop both academic and pastoral roles within universities are discussed.  相似文献   

在线教师专业发展新理路：英国“学习设计支持环境项目”的探索与启示*     

胡新建 《外国中小学教育》2013,(10)

在线合作与反思成为教师专业发展的重要途径,具有显著的生态性效应、经济性和可持续性优势。英国伦敦大学教育学院承担的学习设计支持环境项目是对在线教师专业发展的一次成功探索,取得了良好的社会效益。作者概括了该项目的研究背景,整理了其探索内容和路径,分析了其理念以及对我国在线教师专业发展研究和实践的意义和启示。  相似文献   

Understanding the relative contribution of technical and tactical performance to match outcome in Australian Football     

Christopher M Young  Wei Luo  Paul B Gastin  Daniel B Dwyer 《Journal of sports sciences》2020,38(6):676-681

ABSTRACT

The aim of this study was to assess if tactical and technical performance indicators (PIs) could be used in combination to model match outcomes in Australian Football (AF). A database of 101 technical PIs and 14 tactical PIs from every match in the 2009–2016 Australian Football League (AFL) seasons was merged. Two outcome measures Win-loss and Score margin were used as dependent variables. The top 45 ranked technical and tactical PIs from a feature selection process were used to model match outcome using decision tree and Generalised Linear Models (GLMs). Of the top 45 selected features, this included seven tactical PIs. The Win-loss-based Decision tree model achieved a classification accuracy of 89.0% and GLM 93.2%. A Score margin-based GLM achieved a root mean squared error (RMSE) of 6.9 points. A combined approach to the classification of match outcomes provided no improvement in model accuracy compared with previous literature. However, this study has established the relative importance of technical and tactical measures of performance in relation to successful team performance in AF.  相似文献   

Statistical and Practical Concerns With Published Communication Research Featuring Structural Equation Modeling     

Alan K. Goodboy  Rex B. Kline 《Communication Research Reports》2017,34(1):68-77

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