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物理教学中借助于电教媒体、运用远程教育资源,能够使抽象知识具体化、形象化,简明生动,有助于化难为易,突破重点和难点,从而提高学生的观察能力和分析能力,优化课堂教学结构.在选择远程教育资源的同时应该制定以下原则: 相似文献
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Jing ZHAO Hui-min YAN Ya LI Jia WANG Lu HAN Zhi-hao WANG Meng-xiong TANG Wei ZHANG Yun ZHANG Ming ZHONG 《Journal of Zhejiang University. Science. B》2015,16(5):380-387
目的:观察匹伐他汀钙对高胆固醇血症患者外周血管的影响。创新点:首次在国内发现匹伐他汀钙能够改善高胆固醇血症患者肱动脉和颈动脉血管内皮功能而且延缓其动脉粥样硬化发展,并首次证实改善内皮功能是匹伐他汀钙延缓其动脉粥样硬化发展的重要原因。方法:按照入选排除标准,选取本院高胆固醇血症患者(HC),完成超声心动图检查的40例。根据剂量不同,分为两个剂量组:1 mg剂量组20例(男性5例,女性15例,平均年龄(55.20±8.35)岁),2 mg剂量组20例(男性9例,女性11例,平均年龄(57.56±6.09)岁)。访视结束后完成超声心动图检查的HC组36例,两个剂量组分别有2人失访。治疗后1 mg剂量组18例(男性3例,女性15例,平均年龄(56.00±7.85)岁),2 mg剂量组18例(男性7例,女性11例,平均年龄(57.79±6.46)岁)。选择本院同期体检中心30例正常人作为对照(年龄和性别均与病例组匹配,男性14例,女性16例,平均年龄(54.94±6.90)岁)。所有研究对象,均经隔夜禁食12~14小时,次日清晨抽取空腹肘静脉血,测定临床生化指标。采用Sequia512彩色多普勒超声诊断仪,应用高分辩率外周血管超声技术,检测HC治疗前后肱动脉血流介导性舒张功能(FMD)、颈动脉结构和功能。结论:经匹伐他汀钙治疗8周后,高胆固醇血症患者血管功能明显改善,表现为FMD升高,僵硬度减小;颈动脉僵硬度和内中膜厚度(IMT)延缓进展与其内皮功能改善密切相关。 相似文献
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Two metal (Ⅱ) complexes based on 1,3,5-triazine-2,4,6-triyltrithio-tri-acetate exhibit similar (6,3)-connected 2D layer with kgd topology. Negative and positive magnetic field effects (MFEs) on the fluorescence properties of the Mn(Ⅱ) and Zn(Ⅱ) complexes are observed, respectively. 相似文献
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中国经济学教育创新探析——基于中国经济学现代化的视角 总被引：1，自引：0，他引：1
逐步推进中国经济学的现代化是时代发展的必然要求,中国经济学的传统教育已日益不能适应经济社会发展的新要求,在一定程度上阻碍着中国经济学现代化的实现。中国经济学教育创新的基本思路是在坚持马克思主义基本原理和建设中国特色社会主义理论的前提下,大力推进教育理念和师资队伍的国际化、教育体系和课程体系的本土化、教学方式的创新化。 相似文献
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DING Ming LUO Han-wen WU Yun 《浙江大学学报(A卷英文版)》2007,8(1):10-17
INTRODUCTION Owing to its inherent ability to combat the multi-path fading channel, the modulation technology of orthogonal frequency division multiplexing (OFDM) has been widely used in many high-rate data transmissions such as digital video broadcasting (DVB-T), wireless local area network (IEEE 802.11a) and broadband wireless access (IEEE 802.16e). Re-cently, it is accepted as the most promising candidate for E-UTRA downlink (3GPP TSG-RAN-1, 2006a), which is a super 3G cell… 相似文献
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David Yun Dai Kathryn A. GERBINO Michael J. DALEY 《Frontiers of Education in China》2011,6(1):139-157
China is undergoing an education reform that calls for a change from a rigid, fixed curriculum and didactic pedagogy to a
more flexible, school-based curriculum and more inquiry-based pedagogy. This study investigated the extent to which Chinese
middle and high school teachers (a) endorse an inquiry-based approach and underlying learning principles, (b) practice this
mode of teaching, and (c) believe that the approach is practically viable in the current educational contexts in China. A
structured survey was developed to solicit Chinese teachers’ responses to the above three issues. A total of 582 valid responses
were collected, representing middle and high schools in different geographic locations. The results show that Chinese teachers
are receptive to inquiry-based pedagogy but find practical constraints in fully implementing it. Several cultural and pragmatic
reasons are explored. Policy implications are discussed with respect to teacher education/development, capacity building for
the new pedagogy, and teaching/evaluation alignment. Finally cultural issues are discussed regarding using inquiry-based learning
to enhance critical thinking and nurture independent thinkers. 相似文献
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讨论如下两个问题：问题I 给定非零向量X∈Rn,B∈Rm,求矩阵A∈Rm*n使得AX大于等于B。 相似文献
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本论述了信息技术的应用对企业的决策质量,人员素质,组织结构,管理思想及战略目标等产生的影响;信息技术的成功运用将促进企业变革提高企业的竞争能力。 相似文献