F1中国站大奖赛带来的经济效益和社会效益

2004年F1中国站大奖赛在上海的成功举办,给上海市以及长江三角洲地区带来了巨大的经济效益和社会效益。充分展示了中国和上海改革开放取得的巨大成就,极大地提升了我国和上海的国际形象,也给中国其他城市今后举办类似大型国际比赛提供了经验和借鉴。     

破灭的"美国梦"--浅谈美国文学中的悲剧性"美国梦"主题

“美国梦”源于英国对美国的殖民时期 ,发展于 19世纪。它认为每一个人 ,不管他的出身如何 ,只要努力奋斗 ,就一定会获得成功。然而现实是残酷的 ,许多人并不能实现他们的“美国梦” ,有的人甚至以死亡结局。《马丁·伊登》、《了不起的盖茨比》和《美国悲剧》从不同的历史时期和角度揭示了“美国梦”的腐朽和破灭     

学生成绩评价的数学建模

以课堂表现、平时作业成绩和期末闭卷考试成绩为依据,采用层次分析法构建数学模型;并对某班学生的《线性代数》成绩做了评定.结果表明,评价科学、合理.     

Student learning approaches in the UAE: the case for the achieving domain

The deep versus surface learning approach dichotomy has dominated recent research in student learning approach dimensions. However, the achievement dimension may differ in importance in non-Western and vocational tertiary settings. The aim was to assess how Emirati tertiary students could be characterized in terms of their learning approaches. The study looked into emergent learning factors that may be important in Emirati students. The students were Emirati men in a first-year English for academic purposes programme at a tertiary college (N?=?252). The students completed the Revised Two-Factor Study Process Questionnaire (R-SPQ-2F) to determine learning orientation along the deep and surface approach dimensions. A factor analysis was carried out to assess emergent dimensions in the data. The results on the deep and surface dimensions were inconclusive. However, the factor analysis suggested a disposition towards a construct that we characterize as ‘attainment of satisfaction from learning’. In addition, the factor analysis suggested the possibility of the achieving domain emerging as a separate construct from the surface domain in this context, contrasting with previous research employing the R-SPQ-2F. The results suggest that the deep versus surface learning approach model may not sufficiently represent the complexity of student motivations and strategies in the current context. In addition, student affect tied to outcomes is discussed as an important though perhaps overlooked dimension in non-Western contexts. The implications of the results to future research are considered.     

Isolation ofMycobacterium Tuberculosis 31 kDa antigen protein of diagnostic interest from culture filtrate using anti-ES-31 antibody by affinity chromatography

Proteins secreted into the culture medium byMycobacterium tuberculosis (M. tb) are shown to be source of antigens of immunodiagnostic interest. Anin vitro released 31 kDa antigen ESAS-7F isolated fromM.tb H₃₇Ra culture filtrate by salt precipitation, SDS-PAGE and cation exchange fast protein liquid chromatography (FPLC) was shown earlier to be a diagnostically important antigen fraction. In this report, we describe the isolation of ESAS-7F antigen using monospecific antibody coupled to sepharose CL-4B column. The percentage recovery of ESAS-7F antigen using affinity chromatography was approximately 8% of the total ES antigen proteins compared to 0.05% obtained by conventional purification steps using salt precipitation, SDS-PAGE and FPLC. Similar seroreactivity was observed by the antigen isolated by both the methods in indirect ELISA. Affinity chromatography helped in an increased recovery of ESAS-7F antigen and obviates the need for time consuming conventional purification steps.     

基于DSP的交流变频调速系统的设计

本文在分析电压空间矢量调制基本原理的基础上,组成了以TMS320F2812为核心的控制系统,实现SVPWM算法对交流电机进行变频调速.     

基于μC/OS-Ⅱ的嵌入式数据采集仪的设计与研究

对嵌入式数据采集仪的整体结构进行了概述,详细介绍了系统设计过程中的关键技术:硬件调理电路、网络模块及软件模块的设计,并在设计过程中确立了模块化和层次化的思想。     

旋转分子马达及其研究进展

旨在介绍分子马达的研究历史及有关旋转分子马达的基本知识,并简述本领域在实验上和理论上的研究进展及所面临的挑战.     

德国F＋U培训对TAFE关键能力培养的启发与借鉴

澳大利亚的TAFE教学理念是以“关键能力”培养为核心的,它在实施过程中面临着理论与实践的一系列问题,而以德国F＋U培训采用的一系列行动导向教学法为解决这些问题提供了很好的启发与借鉴。