神奇的26个字母

26个英文字母在中学物理中扮演着重要角色,许多物理知识就凝缩在这小小的字母里面,你知道这些字母通常所表示的物理含义吗?     

使用CourseBuilder插件实现网上测试

介绍了CourseBuilder插件在网络化教学中的应用，通过具体的实例展示了该插件在制作交互式习题或测试网页的强大功能。     

Various ways to determine rational number size: an exploration across primary and secondary education

European Journal of Psychology of Education - Understanding rational numbers is a complex task for primary and secondary school students. Previous research has shown that a possible reason is...     

自然手语与规约手语之研究

目前中国大多数聋校是以手语为主要教学语言。本文从手语的基本特点入手 ,把手语分为自然手语和规约手语并具体分析了两者的特点 ,进而就如何在课堂教学中运用好自然手语和规约手语 ,以提高课堂教学效率 ,促进聋生语言能力的发展以及以建立聋人手语语料厍。     

基于ARM和Ubuntu的地质矿山监控系统的设计与实现

地质矿山监控系统使用基于ARM微处理器S3C2440和Ubuntu嵌入式Linux操作系统．通过USB摄像头获得实时的视频,使用Linux系统的视频编程接口Vjde04LiFinux进行编程．该系统实现了对地质矿山开采和隧道施工的远程视频监控和实时传递视频,为安全生产、科学调度提供了直观、可靠的方法．     

遍指性非差比义构式

借鉴构式语法理论的框架,对递进性差比义构式进行全面考察,将其分为A、B、C、D四种变式,并对各种变式之间的承继关系以及该构式的成因进行认知范畴的探索,给出合理的解释。非典型的构式（D式）发生了“质变”,表达“遍指性非差比义”,而这个构式义无法从“一M比一M”中推导出来,因而是更典型的构式。指出遍指性非差比义其质变的根源在于“量级序列”的缺失,“比”的原型义虚化,从“实比”演化为“虚比”。     

悲剧性的毁灭与喜剧性的忧郁——试比较《欲望号街车》与《樱桃园》不同的审美特质

作为深受俄国剧作家契诃夫影响的美国剧作家,田纳西.威廉斯在其剧作《欲望号街车》里表达了与契诃夫的名剧《樱桃园》极为相似的创作主题。然而,两位剧作家各自生活经历的不同,以及各自审美观念的不同,造成了这两部主题相近的戏剧有着不同的审美特质。威廉斯的悲剧性审美观照和契诃夫戏剧性的审美心态赋予了这两部主题近似的戏剧以相异的戏剧冲突处理方式,形成了两部戏不同的审美情趣,同时也体现了契诃夫与威廉斯两位剧作家不同的审美精神。     

Ecological Mural as Community Reconnection

Murals are particularly visually captivating forms of public art due to their size and accessibility. Mural images also capture public attention and provoke viewers to explore layers of meaning and find hidden stories. They are often in places that people come to visit, study, play, congregate and discuss matters that may relate to the content of the mural. To this end, murals can be effective tools for helping communities think about their environmental issues. This article discusses the Mystic River mural project in Somerville, Massachusetts, USA. It addresses how the local art councils, mural artists, local students, community members and non‐profit organisations collaborated to carry out this ongoing mural project. The purpose of this research is to examine how Mystic River eco‐murals were created, what challenges and benefits the eco‐murals provided, how local social concerns were represented through the eco‐murals, how eco‐murals can continue to promote environmental awareness and inspire youth about their community and the local environment, and how the mural can continue to reflect or affect the meaning of the place. This process can serve as an example for other communities that seek to address their environmental concerns through public art.     

美国外语教学法的发展及其影响因素剖析

美国外语教学法的发展变化给世界外语教学带来了极大的影响。本文在以往研究的基础上,对美国外语教学法的发展进行梳理,剖析影响美国外语教学法发展的因素,并探讨外语教学法发展的趋势。     

Space- and time-efficient approach for virtual machine provisioning

As a new promising paradigm, cloud computing can make good use of economics of scale and elastically deliver almost any IT related services on demand. Nevertheless, one of the key problems remaining in cloud computing is related to virtual machine images, which require a great amount of space/time to reposit/provision, especially with diverse requests from thousands of users simultaneously. In this paper, by using the splitting and eliminating redundant data techniques, a space and time efficient approach for virtual machines is proposed. The experiments demonstrate that, compared with existing solutions, our approach can conserve more disk space and speed up the provisioning of virtual machines.