SMA纤维比选的试验研究     

蔡建国 《科技广场》2007,(1):38-40

目前,民航规范中SMA沥青混合料的纤维素经验掺量为0.3%-0.5%。本文通过实际的例子对民用机场跑道中使用的SMA沥青混合料进行一系列的路用性能试验研究,包括析漏、肯特堡飞散、车辙、抗水损害、低温稳定性能等试验,以确定推荐SMA沥青混合料的最佳纤维掺量。并对几种不同的木质纤维素进行了比对试验,使得纤维素的选择有一套完整的理论基础。  相似文献   

模糊综合评价法在高校内部审计风险评价中的应用     

曲庆杰  宋丽平 《科技与管理》2007,9(5):89-91

首先分析了应用模糊综合评价法的可行性，然后利用模糊综合评价方法对高校内部审计风险进行评价，并予以实例详细说明，以达到有效控制内部审计风险的目的。  相似文献   

应用“浓度-价值损失率法”评估地下水源污染经济损失——以石家庄滹沱河地下水源为例   总被引：2，自引：0，他引：2  

刘长礼  叶浩  董华  张云  裴丽欣  姜建梅  侯宏冰 《资源科学》2006,28(6):2-9

为利用经济杠杆更好地保护地下水资源,把地下水污染造成的经济损失也纳入“绿色GDP”核算体系,需要对地下水污染造成的经济损失进行评估,但其评估方法至今仍没有研究出来。“浓度-价值损失率法”比较早也比较多地用于地表水污染造成的经济损失评估,但用于地下水污染损失评估的报道至今未见报道。本文以石家庄滹沱河地下水污染造成的经济损失评估为例,通过深入地对该地水文地质、环境地质和水质等资料进行分析,并采集水样测试,取得相关水文地质、地下水质量和地下水污染参数后,利用“浓度-价值损失率法”评估地下水污染造成损失。结果表明, 滹沱河两处污染源对地下水污染所造成的直接经济损失约为0.4632×10⁸元,间接损失为2.5474×10⁸元;“浓度-价值损失率法”依据污染物对地下水质量的损害程度即损失率与未受污染的同一水体的总经济价值K乘积来计算,符合环境经济学的原理,理论依据充分;只要能准确求取地下水水质参数、水文地质参数,利用此法能准确地计算地下水污染造成的经济损失。  相似文献   

多维模式的形成性评估促进大学英语听力教学的实践研究     

訾南力  武力宏  郑华伟 《山东教育学院学报》2011,26(5):68-72

大学英语学习的培养目标是培养学生英语综合应用的能力,特别是听读能力,多维模式的形成性评估有助于英语听力教学的改进与提高。根据新的《大学英语课程教学要求》（课程要求2004）,以大学英语的课程改革为契机,以北京服装学院的大学英语听力教学改革为范例,试图探索一种具有示范性的大学英语听力教学的形成性评估的新模式。  相似文献   

Collective reflective assessment for shared epistemic agency by undergraduates in knowledge building     

Yuqin Yang  Qianqian Chen  Yawen Yu  Xueqi Feng  Jan van Aalst 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1136-1154

We examined the facilitation of shared epistemic agency through a knowledge-building (KB) design that included analytics-supported collective reflective assessment (AsCRA). Forty undergraduate students taking a Liberal Studies course at a university in central China used the promising ideas tool and the knowledge building discourse explorer to self-analyze the online discourse they had created in Knowledge Forum® (KF), an online discourse environment; 34 students in a comparison section of the same course used KF but did not use the additional tools. Both classes were taught by the same teacher and studied the same inquiry topics. Multifaceted analysis of students' interaction in and the quality of discourse on KF, an educational online platform, indicated that analytics-supported reflective assessment helped them to develop high-level shared epistemic agency in the KB process. Qualitative analysis showed that AsCRA helped students to focus on high-level goals (idea negotiation, synthesis of ideas and rise above thinking) in KB, and to engage in continuous assessment, reflection, and action planning to regulate and improve their discourse. The findings have important implications for the design of technology-rich environments to support learners, and may help teachers identify the potential uses of such environments to encourage learners to engage in productive collaborative inquiry and develop metacognition and agency.  相似文献   

美国研究生贷款政策及其风险探析     

李海生 《复旦教育论坛》2010,8(3):76-80

美国已建立起较为完善的研究生贷款体系,贷款已成为研究生最主要资助方式之一。研究生贷款具有资助对象范围广、资助额度高、资助重点向女性和少数民族弱势群体倾斜、资助力度与学科专业相适应等特点。研究生贷款政策面临的主要风险包括研究生债务负担剧增,学习方式和学位完成率受到影响以及还款拖欠率上升等。美国的经验表明,制定专门的贷款政策、合理运用贷款工具以及完善贷款回收保障措施有助于这一政策的良性发展。  相似文献   

Unravelling continuous assessment practice: Policy implications for teachers’ work and professional learning     

《Studies in Educational Evaluation》2016

Assessment policy in some countries continues to promote the use of continuous assessment (CA) within classrooms. Several policy claims have been made about the potential of CA to improve education. Using data from a 2010 evaluation of the Trinidad and Tobago Continuous Assessment Programme (CAP), canonical correlation analysis (CCA) was used to unravel the pattern of relationships between institutional variables, professional learning, teacher beliefs, and CA components. The CA components measured were (1) overall use, (2) multiple assessment formats use and (3) formative feedback use. Each CA component was shown to be associated with different variables, with overall use related to several teacher belief factors such as extra-role behaviour. However, multiple assessment formats use added only a small amount of unique variance to the CCA solution. Moreover, the canonical variate for formative feedback use was not statistically significant. These findings have implications for CA as a policy tool. Successful implementation of CA may require high quality professional learning as well as teacher workforce remodelling. Even when implemented successfully, however, CA may not be a useful vehicle for promoting high quality formative assessment or use of multiple assessment formats.  相似文献   

Better safe than sorry? Risk and educational research     

Per Lindqvist  Ulla Karin Nordänger 《Educational studies》2007,33(1):15-27

This paper presents the argument that education and the teaching profession have been saturated by a new form of risk consciousness and risk consideration. The aim is to shed light on this issue and present a number of empirical examples and questions of interest in educational research. Furthermore, the paper presents some of the central theories regarding risk and an attempt is made to relate these theories to an epistemological framework. The article also emphasizes the problems and issues that arise from the way teachers think, experience and manage risk in their daily work, and examines how this affects their didactic intentions and, in the long run, also the pupils’ learning potential. It is the intention of the authors, in the scientific as well as in the professional discussion, to reintroduce the positive connections between teaching and risk zones, as well as between professional development and risk taking.  相似文献   

自学考试实践环节考核模式的改革与探讨——以江西省为例     

刘永浪  傅惠群  熊小梅 《中国考试》2011,(7)

自学考试实践环节考核是检验自学考试生学习的理论知识应用于实践中的标准,是自学考试的重要组成部分。本文结合江西省自学考试实践性环节考核中存在的问题分析,从改革专业课程体系、依托建立省级学习支持服务中心、加强过程学习和建立考评机制等方面提出提升质量的对策与建议。  相似文献   

基于信息化理念与技术的现代评价——E-assessment的研究和应用     

李骐  王建东 《中国考试》2011,(3)

在现代信息社会的背景下,信息化理念和技术已经成为教育评价与考试发展中不可或缺的因素。以信息化理念和技术为核心的E-assessment概念,是近年来在考试与评价领域发展起来的一种新的评价思想及其应用的集合,本文通过对国际知名教育评价机构——英国剑桥评价的研究,系统阐述了E-assessment的在教育评价与考试中的应用和意义,对我国教育评价与考试工作有着很好的启示和借鉴。  相似文献