人体运动图像边缘处理     

邹亮畴  范毅方  袁支润  丁焕香 《广州体育学院学报》2004,24(2):35-37

根据人体运动图像的特点，引用图像层的平滑处理和图像层的边缘处理获得了较好的人体运动边缘图像，通过轮廓跟踪能较好地提取了人体运动图像边缘，为研究人体运动图像质心定位作好了准备。同时也为处理人体运动图像提供了一种新的方法。  相似文献   

How repeated studying and testing affects multimedia learning: Evidence for adaptation to task demands     

《Learning and Instruction》2016

Two biases can occur in multimedia learning: overconfidence and over-reliance on text processing. The present research sought to identify these biases and to investigate whether they can be reduced, and hence learning fostered, when studying and testing are repeated. In 2 experiments (Exp.1: N = 79, Exp.2: N = 52), students learned either with text only or with text and pictures (multimedia) about how the toilet flush works, gave judgments-of-learning (JOLs), were tested on the learning contents; afterwards this study-test cycle was repeated. Results from both experiments revealed stronger overconfidence due to multimedia in both study-test cycles (JOLs higher than learning outcomes). Eye movement data showed a relative increase in attention on the picture versus text from cycle 1 to cycle 2; this relative increase in attention was related to better learning outcomes. Repeated studying and testing thus helped to reduce over-reliance on text processing in multimedia learning, fostering performance.  相似文献   

Socioeconomic segregation between and within curriculum tracking     

《International Journal of Educational Development》2021

Previous studies have documented social segregation for single types of tracking, but little previous research has compared levels of segregation across different institutional tracking arrangements. This paper uses extensive administrative data of the Chilean educational system to estimate the magnitude and evolution of socioeconomic segregation between- and within-school curriculum tracking. Results indicate that the unequal distribution of students by socioeconomic status between tracks narrows when tracking takes place within schools, mainly in the presence of market incentives that lead schools to focus on particular student populations.  相似文献   

Validity of Self-Reported Pedometer Steps per Day in College Students     

Brittany Star Overstreet  Scott E. Crouter  George A. Butler  Cary M. Springer  David R. Bassett 《Measurement in physical education and exercise science》2016,20(3):140-145

The purpose of this article was to examine the validity of self-reported pedometer steps/day. Forty-seven participants were provided a New Lifestyles NL-2000 (NL-2000; Lees Summit, MO, USA) pedometer and a physical activity (PA) diary for 3 weeks, but not informed of the data-storing capabilities. For weeks 2 and 3, each participant was given a step goal of 3,000 steps/day above week 1 average. A 2 × 3 repeated measures analysis of variance (ANOVA) was used to examine differences between reported steps/day. Bland–Altman plots assessed the mean bias and limits of agreement between reporting methods. Mean self-reported and NL-2000 steps/day were 9,264 ± 3,555 and 8,971 ± 3,590 steps/day (n = 26, p > .05). Mean biases were 216 ± 1,753 (week 1), –506 ± 1,355 (week 2), and –590 ± 1,360 (week 3) steps/day. Negative mean bias values indicate higher self-reported steps/day. Mean steps/day were similar between recording methods, but large differences were observed among individuals, suggesting self-reported steps/day may be valid for PA research at the population level, but not the individual level.  相似文献   

建设项目全过程跟踪审计探讨     

阎春彩  刘平 《河北工业大学成人教育学院学报》2007,22(3):55-58

建设项目全过程跟踪审计是接受业主委托,对工程项目进行全过程的跟踪审计工作。其具体内容包括在工程招标阶段协助业主起草招标文件提供咨询服务;在工程施工阶段参加图纸会审,现场勘查,隐蔽工程验收,工程变更、洽商、签证的确认,工程进度拨款的控制,以及最后对工程结算进行的审核。对工程进行全面、详细的跟踪审计工作,协助业主实现建设项目投资控制目标,以便最大的发挥业主投资效益。  相似文献   

基于视频的城市快速路交通流检测及车辆行为监控     

蔡英凤  王海  张为公 《东南大学学报》2011,(2):164-168

提出一种针对城市快速路的视频监控系统,完成交通流及道路异常行为检测.流量检测模块对车辆进行实时跟踪获得各类交通流统计数据,实现快速路车辆运行状况的全面掌控.异常监控模块运用隐马尔科夫模型,对带有时间和空间信息的车辆轨迹进行训练,获得路径划分后对道路车辆轨迹进行参数匹配,提取诸如超低(高)速行驶、违章停车、违规掉头等异常...  相似文献   

What makes a skilled writer? Working memory and audience awareness during text composition     

Denis Alamargot  Gilles Caporossi  David Chesnet  Christine Ros 《Learning and individual differences》2011,21(5):505-516

This study investigated the role of working memory capacity as a factor for individual differences in the ability to compose a text with communicative efficiency based on audience awareness. We analyzed its differential effects on the dynamics of the writing processes, as well as on the content of the finished product. Twenty-five graduate students composed a procedural text explaining how to assemble a model turbine. They were free to consult a documentary source, featuring captioned pictures of turbine parts and assembly steps, at any time. Graphomotor and eye movements were recorded using ‘Eye and Pen’ software with an eye-tracker and digitizing tablet. Results showed that high WM capacity writers used a different strategy to explore the visual source, making longer writing pauses and producing more detailed procedures, and achieved the communicative goal more efficiently, by introducing more reader supports. In conclusion, we discuss the feasibility of audience awareness training.  相似文献   

意图谬见：评帕特里克·怀特《风暴眼》中伊恩形象的经典误读     

毕跃忠 《廊坊师范学院学报》2011,27(2):37-39

《风暴眼》是1973年诺贝尔文学奖得主,澳大利亚当代小说家帕特里克·怀特的代表作。小说中的主人公伊思自始至终在现实与想象之间游弋徘徊,不能审时度势,而是顽固地抱守着虚假的自我认同：英雄主义、骑士精神和浪漫情结。将伊思这一形象置于英美新批评派代表人物维姆萨特提出的“意图谬见”理论镜像中,读者可以看出：被经典批评加冕为“悲情英雄”的伊思事实上毫无英雄色彩可言,称其为“英雄”,乃是对这一人物形象的经典误读。  相似文献   

Discriminating Quantity: New Points for Teaching Children with Down Syndrome About Number?     

Jill Porter 《International Journal of Disability, Development & Education》2019,66(2):133-150

ABSTRACT

The focus of much mathematics teaching has been on the acquisition of counting, an area where children with Down syndrome can experience particular difficulties. Research with typically developing children has highlighted how early awareness of quantity provides a strong platform for the acquisition of later mathematical skills and programmes of early intervention have been introduced. Many of these studies are embedded in the work and traditions of developmental and cognitive psychology and can be difficult to access. Consequently, this is an area that has been largely ignored in the curricula of children with Down syndrome. This paper seeks to make this literature more available. It systematically reviews previous research with children with Down Syndrome on these early foundations. It considers seemingly contradictory findings in the light of differences in tasks, their presentation and instructions, and the responses required, in order to draw conclusions and reflect on the implications for teaching and learning. Some of these propositions are in contrast to existing practices and call for further research to test their effectiveness.  相似文献   

论光与眼睛及色彩的关系     

孔繁荑 《中国教育研究与创新》2005,2(6):29-31

“花开红树乱莺啼．草上平湖白鹭飞。”试想．如果没有太阳，你会感知到花开鸟飞的美景吗？也不会有什么蓝天、白云、青山、绿水、红色的苹果、黄色的柑橘、金首饰、银餐具、宽阔的马路、高大的楼房、美丽的脸蛋、华丽的时装等等。如果是在一片漆黑的夜晚里，再好看的一切，也都会失去它的魅力。  相似文献