Syllable-based reading improvement: Effects on word reading and reading comprehension in Grade 2     

《Learning and Instruction》2020

This study examined the effects of a syllable-based reading intervention for German second graders who demonstrated difficulties in the recognition of written words. The intervention focused on fostering word reading via syllable segmentation. The materials consisted of the 500 most frequent syllables typically read by 6- to 8-year-old children. The aims were to practice phonological recoding, consolidate orthographic representations of syllables, and routinize the access to these representations. Compared to children randomly assigned to a wait-list group, poor readers in the treatment condition showed significant improvements in standardized measures of phonological recoding, direct word recognition, and text-based reading comprehension after the 24-session intervention. Poor readers in the treatment condition also showed greater improvements in development of word recognition compared to children with efficient word recognition skills. The results provide evidence that a syllable-based reading intervention is a promising approach to increase struggling readers’ word recognition skills, which in turn will improve their reading comprehension.  相似文献   

被子植物精细胞分离和特性研究进展     

朱维红  张妍  崔彬彬 《保定学院学报》2020,(3):114-121

精细胞分离是研究雄性生殖发育的前提之一,近半个世纪以来,人们运用不断更新的生物实验技术,对被子植物精细胞开展了分离及细胞分子特征的研究。分析被子植物精细胞分离方法,总结精细胞二型性与倾向性、细胞融合方面的研究成果,并对其研究意义和前景进行讨论。  相似文献   

多旋翼无人机微多普勒特性分析与特征提取     

马娇  董勇伟  李原  李凌霄  杨杰芳 《中国科学院大学学报》2019,36(2):235-243

针对多旋翼无人机目标的识别问题，提出一种基于伽柏（Gabor）变换的瞬时频率估计与快速傅里叶变换（FFT）相结合的微多普勒特征提取算法。首先建立多旋翼无人机旋翼回波模型，并通过仿真分析叶片数目、旋翼转速和初始相位等参数对微多普勒特征的影响，利用Gabor变换得到时频特征。在此基础上通过瞬时频率极大值法提取微多普勒频率，并对瞬时频率采用FFT提取旋翼数和转动频率，从而获得叶片长度估计值。实测数据验证了该算法较为准确地提取无人机的微多普勒参数。  相似文献   

睡美人文献识别方法研究进展     

宗张建 《图书情报工作》2019,63(16):132-142

[目的/意义]睡美人文献是一类蕴藏着巨大科学价值的文献。对国内外睡美人文献识别方法的相关研究成果进行总结与梳理，形成比较完整的综述内容，为国内该领域研究提供参考与借鉴。[方法/过程]按方法属性将识别方法总结为4类，概括各识别方法的基本思路、识别标准、优点及局限性，并参照睡美人文献识别方法的4条原则进行对比，指出各识别方法的适用范围。[结果/结论]睡美人文献识别方法已由单一逐渐丰富，从主观参数向客观指标演变，从单一引文曲线向多种形式曲线并用发展。未来睡美人文献识别研究可从睡眠深度标准再定义、识别方法再组合上深入。此外，还需重视睡美人文献的定性研究和识别方法的验证性研究，重视睡美人引文价值的测度以及预测性研究。  相似文献   

新时期中国体育外交政策探析     

黄〓正 《广州体育学院学报》2019,(1):6-9

2018年朝鲜成功开展一次体育外交行动参加韩国平昌冬奥会，向韩国政府表达出善意的政策倾向，朝鲜半岛的紧张局势也因此得到缓解，体育外交的政治收益又一次得到验证。以新时期体育外交为研究对象，采用文献资料法、逻辑分析法研究新时期开展体育外交活动的政治诉求，如何推动中国的外交事务和体育行业的发展。研究认为：体育外交能够以相抵柔和的方式表达政治意见或者政治态度；中国优秀传统文化、中国传统体育项目需要传承和发扬光大，需要适合根据国际文化变化做出调整，更需要加强对外交流；国家领导人或者体育明星在体育外交中塑造国家形象的功能不容小觑；积极培养能够在国际体育组织任职的人员、积极参与国际体育事物能够缓解中国在体育界话语权薄弱的问题。  相似文献   

The context dependence of physics identity: Examining the role of performance/competence,recognition, interest,and sense of belonging for lower and upper female physics undergraduates     

Zahra Hazari  Deepa Chari  Geoff Potvin  Eric Brewe 《科学教学研究杂志》2020,57(10):1583-1607

While there is a growing body of work that examines disciplinary identity development, unlike qualitative work in this area, quantitative research has not fully incorporated the importance of different contexts, nor has it uniquely focused on underrepresented groups (in this case, women in physics). This study examines how the constructs posited by prior work as important for physics identity, as well as an additional theorized construct, may interrelate and affect female students' physics identity differently depending on the context. Context in this study refers to two different experiential levels in college. The constructs examined include performance/competence, recognition, and interest, as well as sense of belonging. In particular, we used structural equation modeling to examine the effect that these constructs have on the physics identity of two groups of female physics undergraduates: first year students and senior year students. The results reveal that the relationship of the theorized constructs with physics identity vary between the two groups as well as compared to prior research with broad college student populations (not just physics majors). Unlike broad college student populations, for our sample of female physics undergraduates, interest did not have a direct effect on physics identity while sense of belonging was significant only for senior year students. These results exemplify the importance of examining context or different types of student experiences when studying disciplinary identity development rather than generalizing previous frameworks to all contexts.  相似文献   

基于线阵CCD的车轮表面缺陷检测系统的图像预处理研究     

吴海滨  夏需堂 《巢湖学院学报》2011,13(3):61-67

介绍了车轮表面缺陷在线检测系统的工作原理和结构组成,对荧光磁粉的激发光谱和发射光谱以及UV(紫外)LED的发光特性进行了分析和研究,重点介绍了缺陷检测系统的数字图像处理和模式识别技术。经过高精度线阵CCD提取的检测图像,通过采用图像增强、平滑去噪、边缘提取以及二值化等方法,可以有效的识别出可疑的缺陷,完成缺陷在线检测系统的识别报警等。  相似文献   

对高校公共美术教育课程的再认识     

何晓威 《郧阳师范高等专科学校学报》2006,26(2):142-144

高校公共美术教育在过去的若干年里，从总体上呈现出一种较为单一、薄弱的状况，这使之很难适应当代社会人才培养的要求。因而从课程设置到教学内容全面实施改革意义重大。本文从高校公共美术教育对提高大学生综合素质的重要作用引发开去，就一些关键问题进行了较充分的理论论证,以期找到解决问题的办法。  相似文献   

车牌识别技术中字符切割新算法     

李元金  高维春  王精明 《深圳信息职业技术学院学报》2007,5(1):32-34

先对切割下来的车牌进行水平扫描,确定车牌上文字在水平上的大致范围;然后再对确定水平范围后的车牌图像进行竖直扫描确定车牌上每个字符的大致宽度;最后把它们切割下来并进行归一化处理,为下一步车牌特征提取打下了基础。实验结果的数据表明该方法对车牌上字符的切割具有很好的效果。  相似文献   

声目标识别技术研究   总被引：2，自引：0，他引：2  

吕永林 《楚雄师范学院学报》2008,23(3):24-31

本文对声目标识别的关键技术进行研究,探讨用小波分析来进行声信号处理和特征提取,用BP神经网络和支持向量机的模式分类方法来进行分类识别.通过对四种声信号的仿真实验表明,使用小波变换和人工神经网络技术及支持向量机分类技术相结合对声目标进行识别是有效、可行的.  相似文献