“�鱨����”����̽��

对当前情报界“情报检索”与“文献检索”的相互关系、有关“情报检索”类型的几种常见的观点进行了分析，认为情报检索与文献检索实质上是相同的。     

Simulating Oppression: Digital Gaming,Race and the Education of African American Children

Educational game designers and educators are using digital games as a platform for teaching academic content, including multicultural curriculum. However, it is unclear how well digital game-based learning can coexist with the goals of multicultural education for the purpose of meeting the needs of African American children. In this essay, we raise serious questions about the use of digital games to teach about social oppression in ways that privilege the psychological well-being of African American children. We argue that digital games that intend to recreate histories of racial oppression can be harmful to African American children if they reproduce popular and problematic notions of indigenous lives and experiences. We illuminate some of the dangers of such digital games through a preliminary exploration of one digital game designed to teach about facets of African American enslavement. Our essay concludes with recommendations for culturally relevant digital game-based learning design and instruction.     

开展微型化实验的探索与思考

微型化学实验使用试剂为常规量的(1/10～1/100),体现了绿色化学预防化学污染的原则,体现了化学实验由"粗放型"到"集约型"的发展趋势.中学的学生人数远大于大学人数,因此在中学阶段倡导微型化学实验更有现实意义.     

基于MATLAB的交互式多媒体教学技术研究

多媒体在高等学校教学中应用非常广泛,但在多数多媒体教学中缺乏教师与计算机及教师与学生之间的互动.利用MATLAB编程来辅助教学,实现了多媒体教学过程中的人机交互.通过动态设置参数,适时得到输出结果,将大量的动态直观图形信息清晰明快地展现给学生,促进其对抽象知识的理解和掌握,激发其学习兴趣,促进师生之间的良性互动,提高教学效果.     

“学导式”教学法在普通高校排球专项课中的应用

学导式教学法在高校排球专项技术课中的教学实验研究表明,只要能根据大学生的特点及教学内容的具体情况,新授课采取“导”在前,复习课采取“学导式”的教学方法,是切实可行的,可以获得较好的教学效果,同时可培养学生的自我锻炼能力,提高学习积极性。     

广西三江县民族体育旅游资源开发的探讨

三江是广西唯一的侗族自治县 ,旅游资源多姿多彩 ,文化内涵十分丰富。通过对三江民族体育旅游资源条件的分析 ,阐明了三江民族体育旅游资源发展的特点、原则 ,并提出了发展的建议。     

Nonlinear modelling of a SOFC stack by improved neural networks identification

The solid oxide fuel cell (SOFC) is a nonlinear system that is hard to model by conventional methods. So far,most existing models are based on conversion laws,which are too complicated to be applied to design a control system. To facilitate a valid control strategy design,this paper tries to avoid the internal complexities and presents a modelling study of SOFC per-formance by using a radial basis function (RBF) neural network based on a genetic algorithm (GA). During the process of mod-elling,the GA aims to optimize the parameters of RBF neural networks and the optimum values are regarded as the initial values of the RBF neural network parameters. The validity and accuracy of modelling are tested by simulations,whose results reveal that it is feasible to establish the model of SOFC stack by using RBF neural networks identification based on the GA. Furthermore,it is possible to design an online controller of a SOFC stack based on this GA-RBF neural network identification model.     

清朝中央国家机关的公文稽察注销制度述论

清朝在中央国家机关实行的公文稽察注销制度,是其行政监察制度体系的重要组成部分.本文撮要介绍这一制度的基本内容,浅析其利弊得失;在肯定其积极作用的同时,指出了制约这一制度充分发挥作用的主要因素.