对比法在RLC串联谐振实验教学中的应用     

张海军  潘孝军  张振兴  李健 《河西学院学报》2014,(5):110-113

针对RLC串联谐振实验教学,探索总结了一套切实可行的对比教学法。该方法以理想LC自由振荡作为参照,循序渐进地引出RLC串联谐振实验原理,并以能量为主线进行分析与讲解。教学实践表明,使用对比教学法实现了预期的教学目的并取得了良好的教学效果。  相似文献   

A Rethinking on the Benefits and Drawbacks of Common Antioxidants and a Proposal to Look for the Antioxidants in Allium Products as Ideal Agents: A Review     

K. T. Augusti  Regi Jose  G. R. Sajitha  Paul Augustine 《Indian journal of clinical biochemistry : IJCB》2012,27(1):6-20

This review article on the beneficial uses of Allium antioxidants tries to give some answers to the recent doubts raised by Singh et al. (Ind J Clin Biochem 25(3):225–243, 2010) against the claim of some researchers that Antioxidants (AOs) are miraculous molecules. Many people still believe that vitamins like A, C and E are the only true AOs that play important role in the corrections of metabolic derangements in life style diseases and hence all their faults are attributed to the failures of AOs as a class. This is quite unfair as there are many other natural AOs that do equal or even better AO action than the vitamins. Such is the case with the Allium S-alkyl sulfoxide aminoacids and their breakdown products viz, the various poly sulfides and their oxides e.g. allicin and ajoene type compounds which trap electrons mainly. It is true that antioxidant vitamins and β-carotene a precursor of Vitamin A bring about problems as prooxidant or as agents that block some metabolic pathways and gene expression. Again the argument that AOs cannot improve the level of antioxidant enzymes like SOD, catalase and glutathione Px is also not universal. Actually allium AOs can even spare the use of antioxidant vitamins in the body and enhance the action of antioxidant enzymes and supply of ATP and other nutrients to the tissues as the former are good vasodialators and promoters of membrane permeability. The use of AOs should be selective and moderate. Allium AOs satisfy the role of ideal AOs based on many of their invivo and invitro actions reported by the author and others. Their metabolits can regenerate them and recycle them for a sufficient time in the body. They have non antioxidant effects also such as antiplatelet, fibrinolytic, antiinflammatory, immunomodulatory, antiageing actions etc. Plant derived AOs may be more beneficial and better tolerated in their partially purified forms rather than in their absolutely purified forms as the accompanying principles have some protective and regulatory effects in general. This and other aspects of allium AOs are discussed in the paper.  相似文献   

正义与灵魂的和弦——重解柏拉图公民教育理论     

刘峰 《保定师专学报》2009,(6):81-83

《理想国》是柏拉图思想成熟期的代表作。古希腊城邦既是政治共同体、伦理共同体,又是教育共同体。柏拉图教育思想的出发点和归宿都是城邦的公民教育,而公民教育的目的在于培养具有正义德性的公民。以正义与灵魂为线索,就柏拉图公民教育理论及其相关内容进行一些梳理和探讨。  相似文献   

论《理想丈夫》之独特叙述技巧     

孙艳芳 《重庆第二师范学院学报》2009,22(4):71-74

《理想丈夫》是王尔德最为满意的社会喜剧。剧中人物形象性的对话充当行动的“叙述话语”。利用美国学者布思的不可靠叙述理论来解读和分析人物对话对两位主人公言行叙述、品质判断叙述的不可靠性,而这种不可靠叙述增强了隐合作者的规范,加强了该剧的讽刺效果及道德关怀。  相似文献   

别样审美——裕固族爱情故事《神箭手射雁》的善—恶叙事     

钱文霞 《黄冈职业技术学院学报》2011,13(4):55-57

裕固族民间故事《神箭手射雁》,貌似戏剧性的爱情故事,实则不然。借用格雷马斯的"语义方阵"分析法,不难发现:"惩恶扬善"是这则故事的核心主题,"善—恶"二元对立是其深层结构。这种对立在裕固族民间文学中十分突出,形成了裕固族民间文学"善—恶"对立的基本叙事结构。究其原因,既与裕固族长期信仰佛教相关,也与讲述人"以善为美"的审美理想紧密相连。为表达自己的审美理想、完成善-恶叙事,叙述者又不断借用巧合、对比等多种具体叙事技法。  相似文献   

汉代诗论——“诗言志”向“诗缘情”发展的无意桥梁     

邓晶艳 《廊坊师范学院学报》2011,27(6):28-29

“诗言志”与“诗缘情””是中国古代关于诗歌本质和功能的两个命题,它们的转变有一个很复杂的历程。虽然汉代诗学以诗歌作为政治教化的工具,但却多次不自觉地拈出所谓“止乎礼义”的“情”,无意中为“诗言志”向“诗缘情”的转化架起了一座桥梁。  相似文献   

右等价下函数芽的内蕴理想     

杨旭 《毕节学院学报》2011,29(4):45-47

通过研究在接触等价下函数芽的识别问题,把其中的分歧参数改为状态变量,从而给出了在右等价下函数芽的识别问题的基本概念:内蕴理想及其性质。  相似文献   

Career-changers’ ideal teacher images and grounded classroom perspectives     

《Teaching and Teacher Education》2015

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教育批判:困境缘由与范式转换     

雷云 《现代远程教育研究》2015,(1):33-38

教育批判意指对教育思想、言论或行为的理性否定,包括教育实践批判与教育知识批判。教育实践批判最终指向某种教育活动,旨在否定和变革不合理的教育行为;教育知识批判则指向某种错误的思想、言论与概念体系,力图在教育思想观念领域纠偏查错。两者都是在由某种确证依据和理论逻辑构成的批判方式下展开的,具有本质性联系。当前教育批判陷入了困境,表现为教育实践批判异化为自大与私利的争端,教育知识批判则因人们各安其论而日益稀疏。教育批判的困境缘于其"外在-经验"批判范式,这种批判范式使教育批判陷入认识与伦理的双重困境。超越困境可尝试转向"内在-超验"批判。"内在-超验"批判以"教育理想"为批判基础。教育理想既不能通过教育实践"做出来",也无法通过表述、论证"说出来",但可在教育艺术作品非现实地"做"与"说"中逐渐形成。  相似文献   

孔子学院发展模式探析--对四所孔子学院的比较研究     

张东辉  谷婷婷 《复旦教育论坛》2015,(1)

以《孔子学院发展规划(2012－2020年)》为指南,以韦伯的“理想类型”为理论依据,提出了全球孔子学院在不同文化背景和需求下的四种发展模式,即汉语教学型、特色文化传播型、汉语教学与职业技能型、培养汉学家型。通过对四所处于不同国家、办学模式迥异的孔子学院的案例分析,深入细致地比较了四种发展模式的异同,认为只有科学定位和特色发展,孔子学院在未来才能可持续发展。  相似文献