共查询到20条相似文献，搜索用时 15 毫秒
1.
In this paper based on the experiment principle of evaluating adhesion property by scratch testing, the peeling mechanism of thin films is discussed by applying contact theory and surface physics theory. A mathematical model predicting the critical load is proposed for calculating critical load as determined by scratch testing. The factors for correctly evaluating adhesion of coatings according to the experimental data are discussed. 相似文献
2.
金跃权 《浙江教育学院学报》2014,(5):60-64
LoadRunner是信息系统负载测试分析的首选工具软件之一。文章介绍了Load-Runner的组件构成、负载测试工作原理和测试环境配置,并对测试脚本录制编辑、测试场景设计、虚拟IP 地址设置、场景运行监控、测试结果分析等负载测试关键技术进行了深入探讨。 相似文献
3.
马冬梅 《四川教育学院学报》2011,(12):81-83
在对可视材料应用的理论背景及其类型进行介绍的基础上,回顾了近年来国内外二语听力理解中可视材料作用的研究成果,并指出了这些成果对多媒体环境下听力教学及测试的启示,最后针对该领域的研究现状提出了需要进一步深入探讨的问题。 相似文献
4.
蒋华 《黄河之声(科教创新)》2007,(8)
This article begins with a brief introduction to the language testing theory. Then the author analyses in details the significance of communicative testing theory, and point out the major principles and characteristics in communicative testing theory and its function in language teaching and testing. Last, some testing methods and evaluating methods are listed to indicate the significance and role of communicative testing theory in language teaching. 相似文献
5.
When using the popular structural equation modeling (SEM) methodology, the issues of sample size, method of parameter estimation, assessment of model fit, and capitalization on chance are of great importance in the process of evaluating the results of an empirical study. We focus first on implications of the large‐sample theory underlying applications of the methodology. The utility for applied contexts of the asymptotically distribution‐free parameter estimation and model testing method is discussed next. We then argue for wider use of a recently developed, non conventional model‐fit assessment strategy in SEM. We conclude by discussing the issue of capitalization on chance, primarily in situations in which exploratory and confirmatory analyses are conducted on the same data set. 相似文献
6.
Stewart Martin 《Educational Research and Evaluation》2014,20(7-8):592-621
This critical and reflective literature review examines international research published over the last decade to summarise the different kinds of measures that have been used to explore cognitive load and critiques the strengths and limitations of those focussed on the development of direct empirical approaches. Over the last 40?years, cognitive load theory has become established as one of the most successful and influential theoretical explanations of cognitive processing during learning. Despite this success, attempts to obtain direct objective measures of the theory's central theoretical construct – cognitive load – have proved elusive. This obstacle represents the most significant outstanding challenge for successfully embedding the theoretical and experimental work on cognitive load in empirical data from authentic learning situations. Progress to date on the theoretical and practical approaches to cognitive load are discussed along with the influences of individual differences on cognitive load in order to assess the prospects for the development and application of direct empirical measures of cognitive load especially in technology-rich contexts. 相似文献
7.
在美国心理学的发展历史上,认知负荷理论的发展长期以来一直受到来自行为主义理论的抑制。行为主义注重强化学习动机和强调学习的简单形式,凸显出越来越明显的研究局限,最终使得新行为主义者利用认知理论来研究复杂的学习问题。认知负荷理论虽然为教学设计与教学实践提供了具体而系统的教学方法,但也存在认知负荷如何测量、相关负荷与外在负荷的来源如何确定的问题。神经科学关于心理负荷与瞳孔放大的研究,以及对监测认知负荷变化的成像方法的研究为解决这些问题提供了思路和实验证据。具体而言．瞳孔放大与血管收缩可以作为心理负荷测量的标准和替代方法;借助于神经科学和生物科学的脑成像方法（如事件相关电位（ERPs）、功能性磁共振成像（fMRI）等）能够揭示大脑工作记忆的基本过程,记录大脑活动的差异,甄别大脑加工活动的模式。在未来,研究者应保持一种开放的心态来看待认知心理学和神经科学在过去与未来取得的进步,并谨慎地应用各种神经科学研究方法来深入地研究作为认知负荷基础的神经和认知机制。我们的最终目标是寻找一个能在认知心理学和神经科学之间架起桥梁的统一理论。 相似文献
8.
This paper presents a methodological frameworkfor practice-based research in the field ofnetworked learning, based on the author'sapproach to carrying out a case studyevaluation of a networked professionaldevelopment initiative for information servicesstaff in higher education. The theoreticalcase for the framework is made with referenceto principles associated with constructivistprogramme evaluation as well as withinterpretivist and critical traditions inaction research. The purposes and politics ofthis approach, and the question of validationcriteria for claims about its effectiveness forbuilding theory, as well as for evaluating andimproving practice, are discussed. Issues todo with using computer-mediated communicationas a medium for participatory research are alsoraised. An overview is given of the way thisresearch approach was implemented in practice(including the use of a combination of on-lineand face-to-face data collection methods) andsome methodological issues that arose in thecourse of carrying it out are highlighted. Thepaper concludes by suggesting that as amethodology for evaluating, theorising andimproving practice, `networked action research'also offers an approach to pedagogical design,most obviously in the context of networkedprofessional development for educators andlearner support staff. 相似文献
9.
运用科学计量理论来评价学术期刊从而对学术论文成果进行评价,无疑是为学术论文的评价提供了一把衡量尺子。文章主要探讨了学术期刊评价的意义,提出学术期刊评价应遵循的原则,并对学术期刊评价中应注意的问题进行了分析,以期为学术期刊评价提供一定的理论支撑。 相似文献
10.
Cheu-jey Lee 《Educational Philosophy and Theory》2016,48(6):579-588
This article explores the connection between critical reading and Jurgen Habermas’s theory of communicative action. It proposes that Habermas’s criteria used for evaluating validity claims in communicative action can be applied in reading texts critically. Analyses of different types of texts are presented to show how critical reading is done in a Habermasian way. This article ends with a discussion of the application of Habermas’s theory in addressing educational issues. 相似文献
11.
讨论弹性有限长度杆端部受冲击载荷作用，在轴向应为波传播和反射过程中的动态屈曲问题．利用扰动方程的解、端部支承条件和应力波反射前后波阵面相容条件得到了动态屈曲的分叉条件，临界载荷和屈曲模态．数值结果表明：临界载荷有多个分支且随时间增加而降低；由于应力波在端部的反射，使临界载荷进一步下降．这个结果就解释了实验中的一些现象． 相似文献
12.
复杂飞机结构裂纹萌生寿命确定的工程方法 总被引：1，自引：0，他引：1
采用静拉伸应变测量试验的方法,确定了典型飞机复杂结构在载荷作用下的应变分布,并准确判断出其疲劳危险部位。对典型飞机复杂结构模拟件进行了等幅加载疲劳试验,并在疲劳试验过程中采用着色探伤方法测得了疲劳裂纹扩展数据。在此基础上,提出并建立了一种适用于确定复杂结构疲劳裂纹萌生寿命的工程方法,包括疲劳裂纹萌生寿命反推法和含有不确定寿命样本的统计推断方法。根据该方法对试验样本疲劳数据进行处理得出了裂纹萌生中值寿命及其在95%置信水平下的单侧置信下限。 相似文献
13.
多媒体学习理论是一个贯通了学习理论与教学理论的科学体系。作为学习理论的多媒体学习认知理论基于双重编码理论、工作记忆模型以及生成加工理论,解释了学习者通过加工语词与画面所呈现的材料来建构知识的学习机制,属于解释性理论;作为教学理论的多媒体教学设计理论发展出一系列教学设计应遵循的原则,为教育实践提供了具有处方性意义的行动指南,属于处方性理论。解释性的学习理论为处方性的教学理论提供了扎实可靠的科学基础。在多媒体学习研究从学习理论向教学理论转化的过程中,多媒体教学设计理论是实现跃迁的关键环节,而认知负荷理论则是理论跃迁成功的关键变量。基于认知负荷理论,梅耶提出多媒体学习认知负荷三元模型,包括必要认知加工、外来认知加工和生成性认知加工。围绕这三类认知加工,梅耶及其同事进行了大量的实验研究,最终确定了12项与多媒体学习认知理论及其前提假设保持高度逻辑一贯性的多媒体教学设计原则。这些原则都是经得起实践检验的,但教学设计人员在应用的过程中,应明确各项原则的问题情境、适用范围等边际条件。 相似文献
14.
Kurt F. Geisinger 《教育实用测度》2019,32(3):193-197
ABSTRACTThis brief article introduces the topic of intelligence as highly appropriate for educational measurement professionals. It describes some of the uses of intelligence tests both historically and currently. It argues why knowledge of intelligence theory and intelligence testing is important for educational measurement professionals. The articles that follow in this special issue will provide readers with considerable information about the history of intelligence theory and testing, and especially of the Cattell-Horn-Carroll (CHC) model of testing and its implementation. The following articles will also provide a well-reasoned approach to the way science should work in evaluating tests and the models on which they are based. 相似文献
15.
Janine P. Stichter Melissa J. Herzog Sarah A. Owens Emily Malugen 《Psychology in the schools》2016,53(6):583-600
Despite the movement toward identification of evidence‐based practices (EBPs), there is a discrepancy in the availability of school‐based EBPs targeting the unique needs of students with high functioning forms of autism and related social needs. Based on calls for systematic intervention development and evaluation processes, the current study describes the manualization, feasibility, and effectiveness testing of the school‐based Social Competence Intervention for Adolescents (SCI‐A) curriculum. School personnel were trained to implement SCI‐A to a targeted student population. Fidelity and social validity data indicated curriculum feasibility and acceptability within secondary school settings. Student social functioning, executive functioning, and theory of mind demonstrated postintervention gains with moderate effect sizes. Results are promising for SCI‐A's continued positive trajectory within the phases of EBP evaluation research. Challenges for intervention effectiveness testing within schools and future considerations for evaluating EBPs are discussed. 相似文献
16.
本文根据批判理论的观点对英语测试,特别是美国TOEFL和英国IELTS进行了历史回顾和现状分析,结果表明:影响英语测试的因素除语言学、语言教学和语言测试理论外,也受到社会政治和经济因素的制约。国外外语测试都是在一定的历史背景下发展起来的,都有其特定的历史条件和社会需求。 相似文献
17.
Students frequently engage in note-taking to improve the amount of information they remember from lectures. One beneficial effect of note-taking is known as the encoding effect, which refers to deeper processing of information as a consequence of taking notes. This review consists of two parts. In the first part, four lines of research on the encoding effect are summarized: 1) manipulation of the lecture material, 2) manipulation of the method of note-taking, 3) the importance of individual differences, and 4) the testing procedure used in the empirical studies. This review highlights the fragmented nature of the current literature. In the second part of this review five forms of cognitive load that are induced by note-taking are distinguished. Cognitive load theory is used to integrate the divergent results in the literature. Based on the review, it is concluded that cognitive load theory provides a useful framework for future theory development and experimental work. 相似文献
18.
Elisabeth Georgiadou Evangelos Triantafillou Anastasios A. Economides 《British journal of educational technology : journal of the Council for Educational Technology》2006,37(2):261-278
With the proliferation of computers in test delivery today, adaptive testing has become quite popular, especially when examinees must be classified into two categories (pass/fail, master/nonmaster). Several well‐established organisations have provided standards and guidelines for the design and evaluation of educational and psychological testing. The purpose of this paper was not to repeat the guidelines and standards that exist in the literature but to identify and discuss the main evaluation parameters for a computer‐adaptive test (CAT). A number of parameters should be taken into account when evaluating CAT. Key parameters include utility, validity, reliability, satisfaction, usability, reporting, administration, security, and thoseassociated with adaptivity, item pool, and psychometric theory. These parameters are presented and discussed below and form a proposed evaluation model, Evaluation Model of Computer‐Adaptive Testing. 相似文献
19.
测试元模型在模型驱动的测试中居于核心地位,在测试过程中保证测试元模型能够被正确地存储与读取是非常重要的。借助于JUnit这一通用测试框架,对测试元模型的存储与读取功能进行了单元测试。在明确测试需求的基础上,提出了测试用例的设计方法与测试结果的判定原则,并结合实例进行了说明。最后讨论了测试的具体实现和相应的测试结果。 相似文献
20.
分析了直线度评定的3种常用方法,利用AUTOCAD提供的强大的绘图功能,绘制并精确确定直线度误差值.通过实例分析比较,证明该方法可显著提高评定直线度误差的精度和效率. 相似文献