CV法测缓变PN结杂质浓度分布的研究     

肖湘萍 《贵州教育学院学报》2001,12(4):20-23

在各种测量杂质浓度分布的方法中 ,CV法因其快速、容易 ,对材料无损伤而被广泛采用 ,在本文中我们将研究其在缓变P -N结中的应用。  相似文献   

Adolescents earlier diagnosed as dyslexic show major IQ declines on the WISC-III     

P. T. Ackerman  N. L. Weir  C. A. Holloway  R. A. Dykman 《Reading and writing》1995,7(2):163-170

Adolescents (n=43) previously diagnosed as dyslexic/reading disabled had markedly lower IQ scores on the newly standardized Wechsler Intelligence Scale for Children (WISC-III) than on the earlier administered WISC-R. The declines for Verbal, Performance, and Full Scale IQs were 10, 12, and 11 points, respectively, which were twice as great as in a subset of the standardization sample given both versions of the WISC. The adolescents did not show a significant decline in standard scores from the Wide Range Achievement Test (Level I to Level II). However, only two subjects had current reading and spelling standard scores above the 25th percentile. The impact of lower WISC-III IQs on guidelines for classification of students as learning disabled is discussed.  相似文献   

An international comparison using a diagnostic testing model: Turkish students’ profile of mathematical skills on TIMSS-R   总被引：2，自引：0，他引：2  

Enis Dogan  Kikumi Tatsuoka 《Educational Studies in Mathematics》2008,68(3):263-272

This study illustrates how a diagnostic testing model can be used to make detailed comparisons between student populations participating in international assessments. The performance of Turkish students on the TIMSS-R mathematics test was reanalyzed with a diagnostic testing model called the Rule Space Model. First, mathematical and cognitive skills (‘attributes’) measured by the test were determined. One hundred sixty-two items were coded in terms of their attribute involvement, creating an incidence matrix—the Q-matrix. Using the Q-matrix and the student response data, each student’s attribute mastery profile was determined. Mean attribute mastery levels of Turkish students were computed and compared to those of their American peers. It was shown that Turkish students were weak in algebra and probability/statistics. They also demonstrated poor profiles in skills such as applying rules in algebra, approximation/estimation, solving open-ended problems, recognizing patterns and relationships, and quantitative reading.

Enis DoganEmail:

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DIALANG:评介与启示     

陈宁 《中国考试》2011,(6)

DIALANG-欧洲诊断性语言测验系统是面向大众的诊断性评价的先驱。本文对该测验系统的开发背景、开发依据、测验内容、测验特点以及测验过程进行了较为全面的介绍。在此基础上,为推动我国诊断性评价的开展,文章提出了4点建议:1)关注过程,服务学习;2)开发主观题自动阅卷技术,全面考查各语言技能;3)建立我国自己的语言教学和评价标准;4)建立具有中国特色的、可持续性的诊断性评价体系。  相似文献   

Reliability and validity of field-based fitness tests in youth soccer players     

James H. Dugdale  Calum A. Arthur  Dajo Sanders  Angus M. Hunter 《European Journal of Sport Science》2019,19(6):745-756

This study aimed to establish between-day reliability and validity of commonly used field-based fitness tests in youth soccer players of varied age and playing standards, and to discriminate between players without (“unidentified”) or with (“identified”) a direct route to professional football through their existing club pathway. Three-hundred-and-seventy-three Scottish youth soccer players (U11–U17) from three different playing standards (amateur, development, performance) completed a battery of commonly used generic field-based fitness tests (grip dynamometry, standing broad jump, countermovement vertical jump, 505 (505COD) and T-Drill (T-Test) change of direction and 10/20 m sprint tests) on two separate occasions within 7–14?days. The majority of field-based fitness tests selected within this study proved to be reliable measures of physical performance (ICC?=?0.83–0.97; p?p?2 (7)?=?101.646, p?相似文献   

The Domain-Specificity of Elementary School Teachers’ Judgment Accuracy     

《Contemporary educational psychology》2023

Teachers’ diagnostic competence for accurately judging students’ achievement is essential for instructional practice and professional decisions. To promote their judgment accuracy, it is important to know if this is a general or domain-specific skill. We investigated teachers’ judgment accuracy in German language (one subdomain: reading) and mathematics (two subdomains: geometry; stochastics) and examined differences across domains (i.e., German and mathematics) and across subdomains (reading; geometry; stochastics). We examined the judgment accuracy of 59 German elementary school teachers who teach both German and mathematics, judging the achievement of 1227 students in the three subdomains. We conducted multilevel analyses with a subsample of 39 teachers and 787 students and calculated different accuracy components (i.e., rank, level, and differentiation) to examine the comparability of our results. In line with prior research, findings revealed that teachers’ judgments were fairly accurate. However, there were significant differences between teachers’ average judgment accuracy in different subdomains (between-person comparisons) and no or only a weak relation between individual teachers’ judgment accuracy in different subdomains (within-person comparisons). Findings support the notion that teachers’ judgment accuracy of student achievement is domain-specific with respect to the investigated subdomains. Practical implications for the promotion of teacher judgment accuracy are discussed.  相似文献   

突显观视角下的英语记叙文语义理解分析——以改写欧亨利小说《麦琪的礼物》为例     

杨梅 《六安师专学报》2013,(3):124-126

口述或记叙时表达的侧重点不同,传递的信息焦点就不同。而语句是语言处理和思维表达的综合过程,若借助于突显观的限制,可使表达形象生动。以突显观为理论基础,从词句及修辞方面分析《麦琪的礼物》这一记叙文体的语义焦点的体现过程。  相似文献   

基于profiling系统的软硬件划分方法研究     

吕争  湛宁 《荆门职业技术学院学报》2008,23(3):56-61

通过对path profiling和loop profiling对软硬件划分作用的分析,发现了在特定条件下pathprofiling相对于loop profiling的优点,并提出了一个新的基于profiling系统的软硬件划分的方法。  相似文献   

高职院校《兽医临床诊断技术》实践教学改革探索   总被引：2，自引：0，他引：2  

章红兵  麻延峰  何海健  王宏艳  徐玉花  金根炉 《金华职业技术学院学报》2009,9(4):79-81

《兽医临床诊断技术》是高职院校畜牧兽医专业的一门重要的专业基础课。高职院校《兽医临床诊断技术》在实践教学中存在着校内外实训基地不足、实践性教学环节实践性不强等问题。调整实践教学大纲、加强实训基地建设、改革教学方法和考核方式,以提高高职院校《兽医临床诊断技术》实践教学效果。  相似文献   

“医疗电子影像诊断仪”实训平台的设计与实现     

徐健  唐珺 《九江职业技术学院学报》2010,(4):17-19

本文以＂医疗电子影像诊断仪＂实训平台的研制为主题,描述了该实训平台的整体构成,剖析了主要电路模块的功能,重点阐述了实训平台中各测试点及模拟故障点设置的基本理念,介绍了该平台能实现的实训项目。该平台可为医疗电子类人才的培养提供一种实用、有效的实训教学手段。  相似文献