有关烯烃亲电加成反应的教学探索

本文系作者在多年教学实践的基础上对烯烃亲电加成反应的教学总结，通过拓展马氏定则，拓宽了马氏定则的适用范围，让学习者能轻松地掌握烯烃的亲电加成反应取向问题。将烯烃分子设计在一个假想平面上进行讲解亲电加成反应机理，大大方便学生对烯烃亲电加成反应机理和有关立体化学的理解和掌握，学生在遇到相关内容的问题时可以从容应对。     

发电机励磁系统中可控整流电路CAI课件设计

介绍了用可视化编程语言VisualBasic 6 .0开发发电机励磁系统中可控整流电路的CAI课件演示实验的设计方法 ,通过课件的演示使学生能更形象、直观地感受到发电机励磁系统中可控整流电路输出波形的变化过程 ,为教学提供了方便     

谈多媒体课件的设计制作

多媒体课件是利用现代化教学手段,辅助计算机软件,把教材中不易表现或微观不好描述的现象通过文字、图像、声音展现给学生.特别是政治课教学,容量大、信息量大,利用这多媒体,可以在教学过程中把政治课程生动、有趣地表现给学生,达到教学效果.现就多媒体课件设计、制作过程谈几点认识.     

分子模拟技术在淀粉化学课程教学中的创新型应用

利用计算机模拟技术进行辅助专业课程教学已是当前高校教育发展的一种趋势。该文分析了淀粉化学课程教学存在授课模式单一、实验平台欠缺、理论性强难以直观理解等问题。针对这些问题,通过应用实例,创新性地把分子模拟技术引入到淀粉化学课程教学授课过程中,形象逼真地模拟淀粉分子结构变化及其与蛋白质、脂质、氨基酸等其他物质相互作用过程,使分子水平的反应体系宏观展现在演示平台或课件中,使基础专业类的淀粉化学课程教学更加生动形象、通俗易懂。     

多媒体课件在机械制图教学中的应用

通过机械制图教学中应用多媒体课件的实践,阐述了合理利用教学手段,创造多层次,多视觉的立体学习空间,使抽象,复杂的教学内容变成生动、形象、直观的教学理念,活跃了课堂气氛,提高了教学质量。     

浅论低年级语文教学课件的设计要素

教育家乌坤斯基说过：儿童是用形象、声音、色彩和感受来思维的。多媒体课件正是由这些因素组成的，因此，在低年级语文教学过程中，教师合理地运用多媒体，把课文中所描绘的客观事物或现象生动地展现在学生的面前，必能使学生身临其境，加深感受。在此，我就自己所从事的低年级语文教学，谈谈自己对多媒体教学课件的一些设计要素的理解。     

电气《生产实习》在线学习系统课件的制作

利用现代教育技术结合计算机多媒体技术研制的"生产实习"在线学习系统课件,有效地把图形、图像、声音、视频、动画以及文字等各种多媒体信息及控制实时动态地引入到教学过程中.该课件可在校园网上发布,具有助教助学的双重作用.     

多媒体课件在电子技术实验教学中的应用

针对电子技术实验的特点,利用现代教育技术结合计算机多媒体软件制作了"电子技术实验"教学课件,有效地把图形、图像、声音、视频、动画以及文字等各种多媒体信息及控制动态地引入到教学过程中,并用实践证明了实验课件的科学性和实用性.     

多媒体课件的设计与制作

多媒体课件是利用多媒体计算机把文字、图形图像、动画、影像等多种媒体有机地结合起来 ,提高教学效率和教学质量 ,达到优化教学过程的目的 .多媒体课件制作是师范生应该具备的现代教育技术能力之一 ,主要包括课件的设计、素材搜集与制作方法等     

语文教学中的多媒体技术呈现

多媒体教育技术的广泛应用,为语文教学改革提出了一种新的模式,是一次教育理念的革命,它把整个语文教学过程变成学生"主动参与、探究发现、合作交流"的过程使学生"爱学"乐学",有效地提高了学习效率.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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