倾斜金标试纸图像的线宽测量方法     

周律  陈正伟  朱建华  刘铁兵 《实验室研究与探索》2015,(3):146-149

基于显微图像的金标试纸条测试线线宽参数的测量方法具备操作方便、测量速度快、分辨率高等优点,然而图像采集系统采集到的金标试纸条的显微图像不可避免地会发生倾斜,这为后续的图像分割和参数测量带来了困难,因此需要对倾斜的金标试纸条显微图像进行校正。根据霍夫变换法和最小二乘法在直线检测中的优点和适用条件,拟采用一种结合霍夫变换法和最小二乘法的直线检测算法来求得金标试纸条图像的边缘线和边缘线的倾斜角度参数,并采用图像旋转变换算法实现对原图像的倾斜校正。实验表明,所采用的倾斜校正算法具备计算量小、占用内存小、校正精度高的优点,通过倾斜校正可以准确测量倾斜金标试纸图像的线宽参数。  相似文献   

预算法律制度存在的问题与对策探析——基于公共财政视角     

刘桉呐 《山西广播电视大学学报》2015,(2):61-64

《预算法》作为一国财政领域最为核心的法律,为现代财政制度构建了一个基础性的制度框架。文章以公共财政理论作为我国预算法律制度之基石,以公共预算作为我国预算法律制度发展之目标,着眼于公共财政视野下的预算法,指出预算法对构建社会主义市场经济秩序、制约政府的预算行为与维护纳税人的权益具有重要作用。进而对新预算法中存在的问题进行分析,并基于公共财政视野提出了完善我国预算法律制度的对策。  相似文献   

Research on teaching practicum – a systematic review     

Tony Lawson  Melek Çakmak  Müge Gündüz  Hugh Busher 《欧洲师范教育杂志》2015,38(3):392-407

The aim of the present study is to conduct a systematic review research which focuses on research studies into the school practicum. In order to identify the main issues and also to provide a contemporary picture of practicum, 114 studies published on the topic are reviewed and analysed in terms of: (i) aims, (ii) main participants, (iii) methodology used and (iv) the main outcomes emerging. Many of the reviewed studies take pre-service teachers as their main participants. The review also shows that many practicum studies are relatively small-scale studies since they are mainly qualitative focused and findings derived from a relatively small sample. This suggests that more large-scale studies are needed in the field in order to provide greater insight into teaching practicum. Finally, this systematic review provides some food for thought in the area of practicum research and promotes further studies in this complex field.  相似文献   

Development of Category‐Based Induction and Semantic Knowledge          下载免费PDF全文

Anna V. Fisher  Karrie E. Godwin  Bryan J. Matlen  Layla Unger 《Child development》2015,86(1):48-62

Category‐based induction is a hallmark of mature cognition; however, little is known about its origins. This study evaluated the hypothesis that category‐based induction is related to semantic development. Computational studies suggest that early on there is little differentiation among concepts, but learning and development lead to increased differentiation based on taxonomic relatedness. This study reports findings from a new task aimed to (a) examine this putative increase in semantic differentiation and (b) test whether individual differences in semantic differentiation are related to category‐based induction in 4‐ to 7‐year‐old children (N = 85). The results provide the first empirical evidence of an age‐related increase in differentiation of representations of animal concepts and suggest that category‐based induction is related to increased semantic differentiation.  相似文献   

Effects of Mexican Immigrant Parents’ Daily Workplace Discrimination on Child Behavior and Family Functioning          下载免费PDF全文

Anna Gassman‐Pines 《Child development》2015,86(4):1175-1190

This study investigated Mexican immigrant parents’ reports of perceived workplace discrimination and their children's behavior, parents’ moods, and parent–child interactions. Parents of one hundred and thirty‐eight 3‐ to 5‐year‐old children were asked to complete one survey daily for 2 weeks (N = 1,592 days). On days when fathers perceived discrimination, fathers and mothers reported more externalizing child behaviors, and mothers reported fewer positive child behaviors. When mothers perceived discrimination, they reported more externalizing child behaviors; fathers reported more internalizing child behaviors. Parents reported worse mood on days with perceived discrimination. Perceived discrimination was not strongly related to parent–child interactions. For fathers, but less so for mothers, those whose psychological acculturation indicated separation had more negative relations between daily perceived workplace discrimination and child and family outcomes.  相似文献   

An Empirical Comparison of DDF Detection Methods for Understanding the Causes of DIF in Multiple-Choice Items     

Youngsuk Suh  Anna E. Talley 《教育实用测度》2015,28(1):48-67

This study compared and illustrated four differential distractor functioning (DDF) detection methods for analyzing multiple-choice items. The log-linear approach, two item response theory-model-based approaches with likelihood ratio tests, and the odds ratio approach were compared to examine the congruence among the four DDF detection methods. Data from a college-level mathematics placement test were analyzed to understand the causes of differential functioning. Results indicated some agreement among the four detection methods. To facilitate practical interpretation of the DDF results, several possible effect size measures were also obtained and compared.  相似文献   

The Effect of Planetariums on Teaching Specific Astronomy Concepts     

Cumhur Türk  Hüseyin Kalkan 《Journal of Science Education and Technology》2015,24(1):1-15

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Differential effects of reading trainings on reading processes: a comparison in Grade 2     

Bettina?MüllerEmail author  Axel?Mayer  Tobias?Richter  Ana?Kri?an  Teresa?Hecht  Marco?Ennemoser 《Zeitschrift für Erziehungswissenschaft》2015,18(3):489-512

Phonics, fluency, and reading strategy trainings are evidence-based interventions that foster the reading skills of poor readers in primary school. The purpose of the present study was to compare differential effects of the three types of trainings on the efficiency of component processes on word, sentence, and text level immediately after the training and at a 3-month follow-up. The 235 poor readers were randomly allocated to one of the reading interventions or to a control condition. All interventions consisted of 25 sessions that were scheduled twice a week and lasted 45 min. Results indicated short-term effects of the phonics training and the strategy training on the efficiency of a broad range of word-level and sentence-level processes. None of the treatment effects persisted over the long term, indicating the need for instructional efforts to regularly practice the acquired skills after the actual training.  相似文献   

Criticism and Assessment Applied to New Media Art     

Anna Ursyn 《Teaching Artist Journal》2015,13(4):204-217

Developing new criteria with which to assess work in new media arts.  相似文献   

Parent–adolescent interaction quality and adolescent affect—An experience sampling study on effect heterogeneity     

Anne Bülow  Eeske van Roekel  Savannah Boele  Jaap J. A. Denissen  Loes Keijsers 《Child development》2022,93(3):e315-e331

Person–environment interactions might ultimately drive longer term development. This experience sampling study (Data collection: 2019/20 the Netherlands) assessed short-term linkages between parent–adolescent interaction quality and affect during 2281 interactions of 124 adolescents (M_age = 15.80, SD_age = 1.69, 59% girls, 92% Dutch, Education: 25% low, 31% middle, 35% high, 9% other). Adolescents reported on parent–adolescent interaction quality (i.e., warmth and conflict) and momentary positive and negative affect five to six times a day, for 14 days. Preregistered dynamic structural equation models (DSEM) revealed within-family associations between parent–adolescent interaction quality and adolescent affect (concurrently: r = −.22 to .39; lagged effects: ß = −.17 to .15). These effects varied significantly between families. These findings stress the need for more person-specific research on parenting processes.  相似文献