Effects of slag fineness on durability of mortars

In recent years, the usages of by-products and wastes in industry have become more important. The importance of the sustainable development is also of increasing. The utilizations of wastes, as mineral admixture or fine aggregate, reduce the consumption of the natural resources and improve the durability of concrete. In this study, the effect of the fineness on the high temperature and sulphate resistances of concrete mortar specimens, produced with ground granulated blast-furnace slag (GBFS) replacing cement, is investigated. The compressive and flexural strength test results for all series related to durability effects, exposing temperature and solutions, exposure times for these durability effects, slag content and fineness are discussed. Conse- quently, the optimum slag contents are determined for producing the sulphate and high temperature resistant mortars.     

美狄亚、费德尔与蘩漪形象比较

妇女对悲剧命运的抗争在文学史上的表现是多方面的.在各种压迫面前,女性表现出相似的反抗态势.美狄亚、费德尔与繁漪所处的时代不同,地域空间相异,但她们的遭遇与不幸、反抗与斗争却十分相似,在各自的婚姻爱情体验中都存在相似的精神压抑与极大的苦闷.     

New mode of universal access and Global Memory Net

INTRODUCTION During 1998~2002, I was privileged to serve as a member of the US President’s Information Technol- ogy Advisory Committee (PITAC), and all members were deeply involved in the drafting of several PITAC Reports to the President. The one related to digital libraries was the 2001 Report of the PITAC Digital Library Panel, entitled Digital Libraries: Universal Access to Human Knowledge (PITAC, 2001). It offers an ambitious vision: “All citizens anywhere anytime c…     

知识经济时代我国高等教育行政管理展望

高等教育行政管理的发展，同高等教育事业的发展紧密相关。步入知识经济时代和信息时代的中国高等教育行政管理，必然要有所变化，以适应高等教育的发展趋势。     

High Possibility Classrooms as a pedagogical framework for technology integration in classrooms: an inquiry in two Australian secondary schools*

Understanding how well teachers integrate digital technology in learning is the subject of considerable debate in education. High Possibility Classrooms (HPC) is a pedagogical framework drawn from research on exemplary teachers’ knowledge of technology integration in Australian school classrooms. The framework is being used to support teachers who teach various stages of schooling to take ‘pedagogical steps’ in their practice with technology. This article focuses on the use of the HPC conceptual framework in a study of seven teachers and their students at two secondary schools in New South Wales, Australia. Analysis confirms the practicality of this conceptual framework for technology integration in secondary school classrooms. This inquiry has implications for addressing the reluctance of teachers to integrate technology in curriculum. The article concludes by suggesting that more schools might consider using conceptual frameworks like HPC to support secondary school teachers to enhance student learning with technology.     

近代中国在西方的“他者”形象

研究一个时期一个国家作品对另外一个国家的描述,可以看出这一时期这个国家对另一个国家的总的观点和看法。从比较文学形象学理论出发,梳理19世纪到20世纪20-30年代的中国在西方思想家、传教士和作家作品中的中国形象,可以看出,在大国主义优越感、传教需要和商业利益等现实目的作用下,中国被镀上了一层越来越晦暗的令人害怕与恐惧的色彩,渐渐成为不在场的“他者”。     

《雨中的猫》与《一小时的故事》之比较阅读——女性意识的觉醒与幻灭

本文通过对《雨中的猫》和《一小时的故事》进行对比阅读,研究两者不同的故事情节和相同的对意象和象征手法的运用,挖掘其共同的主题:女性意识的觉醒与幻灭。     

鱼眼图像校正算法研究与实现

鱼眼镜头广泛应用于全景监控领域,本文介绍如何对鱼眼图像进行校正,并对特定角度下拍摄的鱼眼图像提出了一种简单、快速、实用性强的鱼眼图像校正方法,同时给出具体算法的推导,实验表明该方法能取得比较满意的效果.     

现代时间焦虑症与洪州禅学的解决方式

现代人的时间科学迷信及其生存方式使一种普遍性的社会心理顽症——时间焦虑症越演越烈。古老的洪州禅学对解决现代人的时间焦虑症有神奇功效。     

网络环境下我国高校图书馆文献资源建设策略初探

本文立足于我国信息网络建设的实践。探讨了网络环境下高校图书馆的文献资源建设问题,其中主要分析研究了文献采集和数据库建设这两个方面所面临的问题及其对策.