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.     

在化工专业中实施理实一体模块化教学模式探究

针对传统教学模式的不足,在高职化工专业中采用理实一体模块化教学模式,将理论与实践融为一体,有利于培养学生的职业能力,提高学生的就业竞争力。     

高职法学实践教学方式的改革与完善

建立一套科学的高职院校法学课程实践教学体系可以充分体现高职院校的教育特色,强化高职学生技能素质培训,使法学课程从传统的教学中解放出来,形成"理论——实践——理论"的教学模式,体现高校教学创新的要求,为高职院校培养高素质技能人才发挥重大作用。     

Examining creativity through a virtual reality support system

This study explores the effects of immersive VR on an individual’s creativity and factors related to creativity including flow, attention and meditation (i.e., mental relaxation or stress). Sixty undergraduate students were invited to participate in an open-ended challenge to design a wearable technology functioning as a smart phone individually, either in the immersive VR condition (N?=?30) or in the paper-and-pencil condition (N?=?30). Surveys and electroencephalography (EEG) measurements were used to collect data. Findings showed that the participants in the immersive VR condition had higher quality creative products than those in the paper-and-pencil condition. The sequence analysis of the participants’ EEG brainwaves also showed that the participants in the immersive VR condition maintained a more stable focus or attention, while those in the paper-and-pencil condition were more relaxed. Research results led to a deeper understanding of using a VR support system for individual creativity. Recommendations for the design and application of an immersive VR creativity support system are discussed.     

Proteomic analysis of human umbilical vein endothelial cells exposed to PM<Subscript>2.5</Subscript>

Exposure to fine ambient particulate matter (PM_2.5) is known to be associated with cardiovascular disease. To uncover the molecular mechanisms involved in cardiovascular toxicity of PM_2.5, we investigated alterations in the protein profile of human umbilical vein endothelial cells (HUVECs) treated with PM_2.5 using two-dimensional electrophoresis in conjunction with mass spectrometry (MS). A total of 31 protein spots were selected as differentially expressed proteins and identified by matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) MS. The results demonstrated that DNA damage and cell apoptosis are important factors contributing to PM_2.5-mediated toxicity in HUVECs. It is further proposed that PM_2.5 can inhibit superoxide dismutase (SOD) activity and increase reactive oxygen species (ROS) and malonaldehyde (MDA) production in a concentration-dependent manner. Induction of apoptosis and DNA damage through oxidative stress pathways may be one of the key toxicological events occurring in HUVECs under PM_2.5 stress. These results indicated that the toxic mechanisms of PM_2.5 on cardiovascular disease are related to endothelial dysfunction.     

深化环境监测执法体制改革——以第十三届全国人民代表大会第一次会议通过《国务院机构改革方案》为背景

当前我国的环境监测执法工作问题重重,环境监测数据不真实的情况屡屡发生,《国务院机构改革方案》的通过为环境监测执法体制改革提供了契机和平台,在此背景下,应当从统一执法权力、整合执法队伍、建立保障机制等方面深化和推动环境监测执法体制改革,实现监测程序规范化、监测过程痕迹化、监测报告全面化。     

评《二十世纪中国文学史论》

《二十世纪中国文学史论》的编选以现代性为线索,符合20世纪中国文学追求现代性的历史任务。同时,追求现代性意味着文学必须对时代作出回应。尽管这样会使文学及其研究难逃实用目的,但以现代性的核心——理性精神来回应时代不同于以往政治实用论。《二十世纪中国文学史论》以回应时代为灵魂,以现代性为线索,在论文集的编选上达到了形神兼备,成为论文集编选的学术规范典范。     

基于招生考试制度改革的中高职教育有机衔接研究

中高职衔接招生考试制度当前存在诸多问题,突出表现在:对口升学招生指标少,中职学生求学深造的道路依然艰难;中高职衔接重形式轻内涵,片面强调升学率;考试内容存在不完善之处;职业教育缺乏吸引力,高等职业教育面临生源危机。促进中高职教育有效衔接,应当建立灵活开放的招生考试制度,主要措施是成立职业教育招考机构,加大统筹协调管理职能;普遍实施高职院校自主招生考试制度改革;放宽招生计划比例,实行免试制度和推荐入学制度;改革考试内容与形式;拓宽生源渠道,实现"面向人人、面向全社会"的职业教育。     

多丽丝·莱辛《野草在歌唱》中的女性精神生态

通过对英国女作家多丽丝·莱辛(Doris Lessing)的代表作《野草在歌唱》(The Grass is Singing)进行分析,从女性精神生态角度对作品所表达的内涵进行深入探讨,从而在作品中体会作家对女性的精神世界与自然之间关系的关注。     

从认知角度分析现代外语教学流派及其综合运用

现代外语教学流派众多,各有利弊,而认知语言学理论作为穿引线与．其他语言学理论取长补短,融入外语教学中,即“行为—认知”初级阶段、“认知-语法”中级阶段、“认知-功能”高级阶段,不仅是对以前语言学理论不足的补充,也是对认知语言学自身的不断完善。不断完善语言学理论,综合运用不同教法,有利于外语教学改革。