A Fine History of Chinese Opera and Theatre Extant Eary Theatrical Stages of China     

By Che  Wenming 《中外文化交流(英文版)》2013,(4):36-39

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双馈发电机并网后功率控制策略研究     

李艳秀  黄琦兰  王宇  车延博 《科技广场》2009,(11):188-191

风能作为一种可再生的清洁能源日益受到世界各国的广泛关注.在风力发电系统中,双馈发电机并网后的控制策略研究是当前国内外广泛研究的课题.本文首先介绍了双馈风力发电系统的基本理论,并建立了双馈电机在两相旋转坐标系下的数学模型.再次,介绍了双馈发电机的定子磁链定向矢量控制策略.并在该控制策略的基础上,提出了电流内环、功率外环的双通道双闭环控制方法.最后,在Matlab/Simulink环境下对该控制方法进行了验证,仿真波形证明该控制方法能够较好地实现双馈发电系统有功功率和无功功率的解耦.  相似文献   

储氢材料领域国家自然科学基金项目集团管理回顾     

朱敏  陈立新  雷永泉  陈军  车成卫 《中国科学基金》2009,23(2):102-103

储氢材料是可再生清洁能源领域的重要基础材料,国家自然科学基金委员会工程与材料科学部材料科学一处一直关注该领域并给予了长期稳定的支持.为加强从事储氢材料基金项目研究人员的合作与交流,提高项目完成质量,促进各单位形成自己的特色和优势,材料科学一处对储氢材料的基金项目组织了"储氢材料"项目的集团管理[1,2].  相似文献   

丰蕴的情境 乐心的求知——现代远程教育文学课程导学的文化探究     

车晓勤 《北京广播电视大学学报》2010,(6):35-38

"现代远程教育文学课程教学的文化研究"主要探究基于网络背景下现代远程教育文学课程教学所构建的文化情境。"丰蕴的情境,乐心的求知"是电大目前现代远程教育文学课程教学所呈现的文化状态。  相似文献   

Phonological coding and children’s spelling     

Che Kan Leong 《Annals of dyslexia》1999,49(1):195-220

The goal of this study was to predict children’s spelling from their performance on pseudohomophone choice and rhyme matching tasks. A total of 222 nine- to twelve-year-old children in grades 4, 5, and 6 participated. The children were given, individually, a computerized pseudohomophone choice task with 30 item pairs in two conditions, and a computerized rhyme matching task with 68 word pairs in four conditions. Accuracy and speed of processing were assessed. Three memory tasks, a Spoonerism task, a general ability test, and a written spelling test were also administered. Analyses of variance and multiple regression analyses showed that both accurate and rapid choice of pseudohomophones sounding like real words and rhyme matching contributed substantially to variations in spelling. Orthographic knowledge played a role in spelling as shown by the contribution of word pairs that rhymed but were orthographically dissimilar. Phonological coding as tested by pseudohomophone choice was also important.  相似文献   

创新型城市建设中青少年科技创新能力的培养     

陈健  朱文晶 《学会》2008,(12):46-48

紧密结合青少年科技创新活动的现状,在广泛调研的基础上,提出促进青少年科技创新能力培养、有效推进青少年科技创新活动的具体对策和建议,为提升青少年科技创新成果的数量、质量和水平,创造青少年创新人才脱颖而出的条件,加快创新型城市建设中青少年创新人才的培养提供参考。  相似文献   

无人驾驶汽车购买意愿研究     

金奚慧  干宏程 《科技管理研究》2021,41(8):186-192

为深入了解公众对无人驾驶汽车(AVs)的接受度,从AVs购买意愿的角度,基于感知利益-感知风险理论框架,相较于普通燃油汽车或电动汽车,引入技术兴趣和享受驾驶两个心理特征潜变量作为影响公众对AVs购买意愿的特有心理因素,构建结构方程模型,分析公众对AVs购买意愿的影响因素.通过偏好陈述(SP)调查,研究结果表明:(1)感知利益和技术兴趣对AVs购买意愿有显著正向影响;(2)技术兴趣对感知利益有显著正向影响,并间接调节感知利益对购买意愿的作用;(3)感知风险对购买意愿有显著负向影响,而享受驾驶对购买意愿、技术兴趣影响不大.在此基础上,从政策与商业两方面提出针对AVs推广的相关对策建议,如预先推广无人驾驶的特殊车辆、特定路段的无人驾驶公交车辆等,同时增加AVs的价值利益推广,以及加强对AVs功能、搭裁配备等技术升级开发,实现更高级别的人机交互等,以促进消费者提高对AVs的购买意愿.  相似文献   

Animal exercise studies in cardiovascular research: Current knowledge and optimal design—A position paper of the Committee on Cardiac Rehabilitation,Chinese Medical Doctors’ Association     

Yihua Bei  Lei Wang  Rongjing Ding  Lin Che  Zhiqing Fan  Wei Gao  Qi Liang  Shenghui Lin  Suixin Liu  Xiao Lu  Yuqin Shen  Guifu Wu  Jian Yang  Guolin Zhang  Wei Zhao  Lan Guo  Junjie Xiao 《运动与健康科学(英文)》2021,10(6):660

Growing evidence has demonstrated exercise as an effective way to promote cardiovascular health and protect against cardiovascular diseases However, the underlying mechanisms of the beneficial effects of exercise have yet to be elucidated. Animal exercise studies are widely used to investigate the key mechanisms of exercise-induced cardiovascular protection. However, standardized procedures and well-established evaluation indicators for animal exercise models are needed to guide researchers in carrying out effective, high-quality animal studies using exercise to prevent and treat cardiovascular diseases. In our review, we present the commonly used animal exercise models in cardiovascular research and propose a set of standard procedures for exercise training, emphasizing the appropriate measurements and analysis in these chronic exercise models. We also provide recommendations for optimal design of animal exercise studies in cardiovascular research, including the choice of exercise models, control of exercise protocols, exercise at different stages of disease, and other considerations, such as age, sex, and genetic background. We hope that this position paper will promote basic research on exercise-induced cardiovascular protection and pave the way for successful translation of exercise studies from bench to bedside in the prevention and treatment of cardiovascular diseases.  相似文献   

电压数字化测量的量化误差     

车宇  邹书文 《中山大学学报论丛》1998,(4)

模数转换有反馈比较式和积分式．但是,Ａ／Ｄ转换的量化误差不都是±ＬＳＢ／２．双积分转换的量化误差ΔＵＮ来源于对时钟脉冲的计数,且为－１≤ΔＵＮ≤１,已为实验所证实  相似文献   

高校教育移动互联网应用监管研究     

车路 《中国现代教育装备》2021,(1):1-3,16

高校迫切需要将移动互联网应用安全和个人信息安全融入高校网络安全防护体系中,建立长效的教育移动互联网应用监管运行机制,才能有效保障师生个人信息安全.以个人信息安全威胁为出发点,探讨了目前高校教育移动互联网应用监管策略和路径.  相似文献