“物质的物理属性”检测题

一、选择题(每题3分,共24分)1.关于物质的密度,下列说法中正确的是().A.某种物质的密度是这种物质单位质量的体积B.将一杯水等分成三份,则每一份水的密度都是原来的1/3C.密度是物质的一种特有性质D.根据ρ=m/V可知,ρ与m成正比,与V     

英语学习策略和英语成绩的相关性研究

本文通过问卷调查法探讨了英语学习策略与英语成绩的相关关系。本文探讨的学习策略包括元认知策略、认知策略、记忆策略、社会策略、情感策略和补偿策略。同时对英语学习策略与各英语分项成绩的相关性进行了分析。     

2011春季教育展，热潮冷眼观--“第十六届中国国际教育巡回展”北京站之报道

偌大一场盛宴!虽然3月的天气还处于乍暖还寒时,12日,第十六届“中国国际教育巡回展”第一站就在北京国贸大厦的展览大厅拉开了帷幕,来自30多个国家和地区的400多所高校和教育机构参加了这次盛会,在展会期间,     

白章德中国教育部留学服务中心主任“留学是一件专业性很强的事”

不同的国家有着不同的教育特点和收费情况,面对众多留学国家和专业的选择方面,是先选择学校还是选择专业？怎样选择最适合自己的目标留学国？在留学服务机构咨询时,哪些建议可以采纳、哪些意见需要思考？当学生和家长面对这些问题是难免有些不知所措,“留学是一件专业性很强的事,”     

发达国家媒介素养教育概览

媒介素养教育的开展是一项系统工程,绝非一朝一夕之功,需要政府、媒体、教育机构、企业、卫生医疗机构等通力合作,为媒介素养教育提供更多理念、政策、资金、技术上的支持。     

新课改背景下中小学教师在职培训制度的改革

国内外教育教学改革的实践充分证明,建设一支高素质的中小学教师队伍是全面推行中小学课程与教学改革的关键所在。当前,我国中小学正在全力推进新课改,并且已经取得了巨大的成绩,中小学教师教育也取得了可喜的成绩,但我国中小学教师队伍整体素质偏低,对当前新课改的效果产生了较为严重的     

Drunk Driving

醉酒驾车醉酒驾车或酒后驾驶指的是在酒精或麻醉药品的影响下驾驶车辆的行为。它包括饮酒驾车和醉酒驾车。根据国家质量监督检验检疫局的标准,     

构建四级教研机构 推进农村教研

提高教学质量是办学的永恒主题,也是办学的一个长期实践探索的过程。提高教学质量的核心是抓好教研工作,而健全的教研机构是搞好教研工作的前提和保障。     

Length-based vehicle classification in multi-lane traffic flow

For the realtime classification of moving vehicles in the multi-lane traffic video sequences, a length-based method is proposed. To extract the moving regions of interest, the difference image between the updated background and current frame is obtained by using background subtraction, and then an edge-based shadow removal algorithm is implemented. Moreover, a thresholding segmentation method for the region detection of moving vehicle based on location search is developed. At the estimation stage, a registration line is set up in the detection area, then the vehicle length is estimated with the horizontal projection technique as soon as the vehicle leaves the registration line. Lastly, the vehicle is classified according to its length and the classification threshold. The proposed method is different from traditional methods that require complex camera calibrations. It calculates the pixel-based vehicle length by using uncalibrated traffic video sequences at lower computational cost. Furthermore, only one registration line is set up, which has high flexibility. Experimental results of three traffic video sequences show that the classification accuracies for the large and small vehicles are 97.1% and 96.7% respectively, which demonstrates the effectiveness of the proposed method.