An Evaluation of Testing for English Majors Level 8 in China     

LIU Ting-ting 《海外英语》2015,(3)

The paper mainly presents the evaluation of a test named Testing for English Majors (TEM8) undertaken in China’s higher education institution concerning the following aspects:test purpose, test specifi...  相似文献   

自来水厂供电稳定性浅析     

邓其宽 《大众科技》2014,(4):69-70,79

供电稳定可靠是自来水厂正常生产的关键。提升水厂供电可靠性可从以下几方面考虑:供电回路设计,母线设计,用电设备的技术水平与质量水平,管理制度与操作规程等。文章从这几方面论述如何提升水厂的供电可靠性。  相似文献   

产品可靠性与供应链集成优化设计研究   总被引：1，自引：0，他引：1  

徐姗姗  余军合  战洪飞 《科技与管理》2014,(5):33-37

在分析产品结构与供应链集成设计的基础上,提出产品可靠性与供应链集成优化设计方法,建立了以产品可靠度与供应链成本为多目标的产品可靠性与供应链集成优化模型。基于NSGAII算法,提出把约束优化模型转换为无约束优化问题的思路,并给出集成优化模型求解方法。结合某矿山机械厂的应用实例,对不同保修期下的产品可靠性与供应链多目标组合集成优化模型进行分析与验证研究。  相似文献   

谈高校“阳光体育”心理效益评价量表的构建     

文海林  谭克理  田夏 《山西师大体育学院学报》2014,(4):73-76

基于体育锻炼促进理论与社会需求,在文献研究和专家访谈的基础上,结合国内外关于体育锻炼心理效益的相关研究,编制了《高校＂阳光体育＂心理效益评定量表》。该表由主观感知、人际适应、情绪体验、身体自我概念和挫折应对五个维度构成。通过探索性因素分析和验证性因素分析,结果表明本研究量表具有可靠的信效度,可作为高校＂阳光体育＂运动心理效益的评定工具。  相似文献   

体育赛事赞助匹配量表编制与信效度分析          下载免费PDF全文

刘英 《体育科研》2014,(3):15-19

主要采用文献资料法、访谈法等,在获得消费者对体育赛事赞助匹配感知资料的基础上,编制体育赛事赞助匹配量表,并依据项目反映理论,对量表进行项区分度分析。同时采用探索性因子分析和验证性因素分析以检验量表的结构效度,并检测量表组合信度。  相似文献   

Acute responses of soccer match play on hip strength and flexibility measures: potential measure of injury risk     

Darren J. Paul  George P. Nassis  Rodney Whiteley  Joao B. Marques  Dean Kenneally  Hakim Chalabi 《Journal of sports sciences》2014,32(13):1318-1323

Abstract

Regular measurements of groin risk factors may offer a preventive measure against injury. Therefore, the aim of this study was to (1) determine minimal detectable change (MDC) and reliability of hip flexibility and strength measures and to (2) identify the effect soccer match play load has on these measures. Reliability was determined for bent knee fall out test, hip abduction and adduction (hand-held dynamometry (HHD)) in 20 trained youth male soccer players. Reliability was evaluated with the intra-class correlation coefficient (ICC_[2,1]), 95% confidence intervals (CI). Hip strength and flexibility measures were taken before and after an international friendly match. Intra-rater reliability ICC ranges were bent knee fall out (0.75–0.90), abduction (0.83–0.90) and adduction (0.72–0.96). Inter-rater ICCs (95% CI) were bent knee fall out test [0.75 (0.39–0.90) right, 0.71 (0.27–0.89) left hip]; abduction [0.80 (0.50–0.92) right, 0.81 (0.53–0.92) left hip] and adduction [0.72 (0.31–0.89) right, 0.70 (0.26–0.88) left hip]. MDCs were as low as 20.7% of the mean for hip flexibility and 12.5% for strength. In conclusion, HHD and the bent knee fall out test are reliable tools to measure changes in hip strength and flexibility. Finally, a threshold may exist in which match play load negatively impacts hip flexibility.  相似文献   

Psychometric Properties of IRT Proficiency Estimates     

Michael J. Kolen  Ye Tong 《Educational Measurement》2010,29(3):8-14

Psychometric properties of item response theory proficiency estimates are considered in this paper. Proficiency estimators based on summed scores and pattern scores include non-Bayes maximum likelihood and test characteristic curve estimators and Bayesian estimators. The psychometric properties investigated include reliability, conditional standard errors of measurement, and score distributions. Four real-data examples include (a) effects of choice of estimator on score distributions and percent proficient, (b) effects of the prior distribution on score distributions and percent proficient, (c) effects of test length on score distributions and percent proficient, and (d) effects of proficiency estimator on growth-related statistics for a vertical scale. The examples illustrate that the choice of estimator influences score distributions and the assignment of examinee to proficiency levels. In particular, for the examples studied, the choice of Bayes versus non-Bayes estimators had a more serious practical effect than the choice of summed versus pattern scoring.  相似文献   

运用双级数控选模法对体院教师工作状况(成绩)综合评定的实验研究     

刘新平  苏明理 《西安体育学院学报》1993,(2)

本文根据统计学原理、控制理论及人的认知规律研究设计出了双级数控选模评定模型,并试图将它应用于对体院教师工作状态(成绩)的综合考评,经过实验验证和理论分析,表明这一办法具有较强的科学性,且经济实用,达到了评定考核中减少人为因素影响、简化指标体系的目的。  相似文献   

Peer assessment accounting for student agreement     

Jordan L. Neus 《Assessment & Evaluation in Higher Education》2011,36(3):301-314

Peer assessment has been gaining significant ground as a means of fostering an environment of accountability and responsibility for group projects in higher education. A popular peer assessment method assigns individual grades via a linear relationship to peer assessment scores. Using this method, a group member who receives his or her group’s average peer assessment score is assigned the instructor‐given group grade; the group member who receives a total peer assessment score of zero is assigned an individual grade of zero. Unfortunately, applying this method often requires time‐consuming exploratory data analysis because of the potential for the method to yield a high spread of grades, including grades over 100%. The present study proposes a modification, which accounts for the degree of student agreement. When the modified procedure results in a change from the group grade, the direction of change is always the same, but with smaller magnitude, requiring less subsequent data analysis and instructor time demands. Easy‐to‐modify SAS code for applying the method is presented in the Appendix.  相似文献   

新一代天气雷达运行能力评估研究   总被引：1，自引：0，他引：1  

裴翀  石城  邵楠  胡学英 《科技通报》2011,27(3):336-341

研究我国新一代天气雷达运行能力的评估方法,建立天气雷达运行能力评估指标体系,合理地选取现有的新一代天气雷达数据资料,定量地评估各型号、分时段的雷达业务可用性、可靠性、可维修性及其变化趋势.编制能反映雷达运行能力的各类评估图表,并以图表的分析为依据,提出今后发展建议.  相似文献