测量系统分析在实验设备质量评价中的应用     

陈宏 《实验室研究与探索》2011,30(11)

为了掌握实验室设备的质量状况,提出了从质量管理的角度出发,把实验设备纳入测量系统的范畴,对实验教学设备进行质量评价的方法.根据测量系统的过程控制概念、MSA原理和测量系统的评价标准,分析实验设备测量系统的影响因素,建立测量模型,搜集样本和采集测量数据,运用统计软件,分析测量数据的统计特性,根据MSA的评价标准检验结果,得到实验设备测量的质量水平和持续改善实验设备测量质量的方案.通过模拟信号系统噪声测量设备的质量评价过程验证了用MSA评价实验教学设备质量水平的方法.结果表明,该方法在高校实验设备的质量评价中是一种有实用价值的方法.  相似文献   

潮汐区海水侵蚀混凝土结构加速模拟试验装置     

张庆章  黄庆华  张伟平  顾祥林 《实验室研究与探索》2011,30(8)

在海水潮汐区,氯盐侵蚀是混凝土结构耐久性能降低的主要因素针对潮汐区的环境特点设计制作了潮汐区海水侵蚀混凝土结构加速模拟试验装置,该装置主要由微电脑时控开关、全自动水位控制器、磁力水泵、水位传感器、试验箱等组成通过微电脑时控开关控制磁力水泵的开始启动时间;水位控制器和水位传感器控制磁力水泵停止工作时间,使2个试验箱中的混凝土试件交替处于浸润和干燥状态来模拟处于潮汐区的混凝土周期性浸润和干燥的过程.利用设计的试验装置进行了潮汐区混凝土氯盐侵蚀加速试验,试验中该装置严格按照设定的时间制度工作.另外,试验装置工作稳定、噪音小,制作成本很低,并可方便地放置在人工气候环境模拟箱中进行不同环境条件下的耐久性试验.  相似文献   

一个基于知识处理的网络考试系统的设计*     

韩峰  牛振东  马斗 《现代图书情报技术》2005,21(8):65-68

网络教育考试系统是网络教育的有机组成部分,本文在对目前已存在的网络考试系统中存在的问题加以分析，设计并简单论述了一种基于知识处理的集考试、分析和个性化帮助于一体的解决方案，文章同时对部分关键问题进行了讨论。  相似文献   

A simple and inexpensive enteric-coated capsule for delivery of acid-labile macromolecules to the small intestine     

Darren S. Miller  Anne Michelle Parsons  John Bresland  Paul Herde  Duc Minh Pham  Angel Tan  Hung-yao Hsu  Clive A. Prestidge  Tim Kuchel  Rezaul Begg  Syed Mahfuzul Aziz  Ross N. Butler 《Journal of Zhejiang University. Science. B》2015,16(7):586-592

Understanding the ecology of the gastrointestinal tract and the impact of the contents on the host mucosa is emerging as an important area for defining both wellness and susceptibility to disease. Targeted delivery of drugs to treat specific small intestinal disorders such as small bowel bacterial overgrowth and targeting molecules to interrogate or to deliver vaccines to the remote regions of the small intestine has proven difficult. There is an unmet need for methodologies to release probes/drugs to remote regions of the gastrointestinal tract in furthering our understanding of gut health and pathogenesis. In order to address this concern, we need to know how the regional delivery of a surrogate labeled test compound is handled and in turn, if delivered locally as a liquid or powder, the dynamics of its subsequent handling and metabolism. In the studies we report on in this paper, we chose ¹³C sodium acetate (¹³C-acetate), which is a stable isotope probe that once absorbed in the small intestine can be readily measured non-invasively by collection and analysis of ¹³CO₂ in the breath. This would provide information of gastric emptying rates and an indication of the site of release and absorptive capacity. In a series of in vitro and in vivo pig experiments, we assessed the enteric-protective properties of a commercially available polymer EUDRAGIT®L100-55 on gelatin capsules and also on DRcaps®. Test results demonstrated that DRcaps®coated with EUDRAGIT®L100-55 possessed enhanced enteric-protective properties, particularly in vivo. These studies add to the body of knowledge regarding gastric emptying in pigs and also begin the process of gathering specifications for the design of a simple and cost-effective enteric-coated capsule for delivery of acid-labile macromolecules to the small intestine.  相似文献   

Test-enhanced learning in third-grade children     

Antonio Jaeger  Raquel Eloísa Eisenkraemer  Lilian Milnitsky Stein 《教育心理学》2015,35(4):513-521

Several recent studies have shown that retrieval is more efficient than restudy in enhancing the long-term retention of memories. However, studies investigating this effect in children are still rare. Here, we report an experiment in which third-grade children initially read a brief encyclopaedic text twice and then either performed a cued recall test on selected target contents of the text or reread the same text twice. A final four-choice memory test about the text’s contents was administered to all children after seven days as well as tests measuring their IQ and reading skills. In the final four-choice memory test, children who took the initial cued recall test showed significantly greater performance in comparison with children who restudied the text twice (their responses were 87 and 53% correct, respectively). The results suggest that cued recall tests can elicit very robust testing effects in young children, even when complex, educationally relevant materials are used as stimuli.  相似文献   

Did the Gamemakers Fix the Lottery in the Hunger Games?          下载免费PDF全文

Kyle Caudle  Erica Daniels 《Teaching Statistics》2015,37(2):37-40

The Hunger Games is an annual event in the fictional country of Panem. Each year, 24 children (tributes) are chosen by lottery from 12 districts to fight to the death in the arena for the entertainment of the Capitol citizens. Using statistical analysis and computer simulations, we will explore the possibility that the Gamemakers, those in charge of planning the Hunger Games, fixed the lottery. Using the fictitious data from Suzanne Collins' book the Hunger Games, we show how students can learn how to perform a permutation goodness of fit test.  相似文献   

Becoming-topologies of education: deformations,networks and the database effect     

Greg Thompson  Ian Cook 《Discourse: Studies in the Cultural Politics of Education》2015,36(5):732-748

This article uses topological approaches to suggest that education is becoming-topological. Analyses presented in a recent double-issue of Theory, Culture & Society are used to demonstrate the utility of topology for education. In particular, the article explains education's topological character through examining the global convergence of education policy, testing and the discursive ranking of systems, schools and individuals in the promise of reforming education through the proliferation of regimes of testing at local and global levels that constitute a new form of governance through data. In this conceptualisation of global education policy changes in the form and nature of testing combine with it the emergence of global policy network to change the nature of the local (national, regional, school and classroom) forces that operate through the ‘system’. While these forces change, they work through a discursivity that produces disciplinary effects, but in a different way. This new–old disciplinarity, or ‘database effect’, is here represented through a topological approach because of its utility for conceiving education in an increasingly networked world.  相似文献   

Sex,Drugs, and Kinesiology: A Useful Partnership for Sport’s Most Pressing Issues     

John Gleaves  Matthew Llewellyn  Alison Wrynn 《Quest (Human Kinetics)》2015,67(1):1-16

From the gender controversy of South African runner Caster Semenya to the doping practices of disgraced American cyclist Lance Armstrong, recent sporting issues highlight kinesiology’s important role and responsibility to sport. Increasingly, sport organizations, such as the International Olympic Committee, the World Anti-Doping Agency, and international federations, have turned to academics to help navigate their sport science issues. Such complex, cross-disciplinary problems require researchers versed in kinesiology’s sub-disciplines and familiar with problem-based inquiry. Though such cross-disciplinary practices are familiar to kinesiologists, their familiarity only indicates kinesiology’s potential impact on the major issues sport is currently addressing. Kinesiology must be a field comprised of scholars equally comfortable with empirical and humanistic research while at the same time applying their cross-disciplinary knowledge to some of sport’s most pressing issues. Kinesiology ought to consider more collaborative venues for scholars from across its sub-disciplines to work together on complex, cross-disciplinary research.  相似文献   

现行断裂韧度测试标准的差异及对实际测量的影响     

邱保文  李荣锋  凃应宏  袁泽喜 《实验室研究与探索》2007,(11)

针对现行断裂韧度测试标准的不同,分析了钝化线和上界限线的规定形式对实际测量结果的影响,探讨了各标准的侧重点,并对标准的发展提出几点建议。  相似文献   

国家综合改革试验区的理论模型   总被引：4，自引：0，他引：4  

郝寿义  张换兆  赵军 《天津师范大学学报(社会科学版)》2006,(4):2-7,48

国家综合改革试验区的理论模型具体再现了政府、企业、居民和社会的关系。以及市场、经济和社会的关系。从理论上将社会作为一种约束条件，将制度变迁纳入生产函数中，得出国家综合改革试验区的社会福利均衡条件，为未来的国家综合改革试验区的发展及其政策在全国范围内的推广奠定了一定的理论基础。  相似文献