An empirical study of query expansion and cluster-based retrieval in language modeling approach

The term mismatch problem in information retrieval is a critical problem, and several techniques have been developed, such as query expansion, cluster-based retrieval and dimensionality reduction to resolve this issue. Of these techniques, this paper performs an empirical study on query expansion and cluster-based retrieval. We examine the effect of using parsimony in query expansion and the effect of clustering algorithms in cluster-based retrieval. In addition, query expansion and cluster-based retrieval are compared, and their combinations are evaluated in terms of retrieval performance by performing experimentations on seven test collections of NTCIR and TREC.     

大学新生英语课堂焦虑状况调查

运用定量研究的方法,采用Horwitz等的“外语课堂焦虑量表”,对浙江科技学院119名大学英语新生的英语课堂焦虑状况作了统计分析。结果表明,大学英语新生的英语课堂焦虑度是比较高的。女生焦虑度比男生高,但是没有显著性差异;外语焦虑和外语学习效果之间呈现显著的负相关关系;焦虑程度越高,对于外语学习的负面影响越大。据此提出了一些减轻大学生外语焦虑的方法和建议。     

网络教学平台使用的师资培动——香港理工大学的经验

面授和网上教学有机结合的整合式教学越来越成为高校教育和培训的主要模式。本文旨在介绍和分析香港理工大学教学发展中心（简称EDC）如何通过网上教学平台的功能,与面授教学结合起来,发挥面授教学和网上教学的各自优势,使教师培训更加有效。EDC的实践表明,在大学教师培训课程中,发挥网上教学的优势,能帮助学员弥补由于有限的面授教学产生的师生之间、学员和学员之间互动的不足。在网上学习中,通过互相的学习观摩和观念碰撞,能激发学员的学习兴趣,有效地促进学员之间进行探究性学习,同时,这种集体学习的方法,能促进在职教师之间的友好交往和学术交流。     

手机颜色词的类型特征及语用功能

"极夜蓝"、"成功银、骑士灰"、神秘紫、"迷幻红"、等这些新出现的手机颜色词是一类值得研究但却没有引起足够关注的新词.从"四个世界"理论出发,有从物理世界、文化世界、心理世界产生的手机颜色词,它们都具有一些特殊的语用功能.     

The historical context of science and education at the American Museum of Natural History

In this article I critically examine the historical context of science education in a natural history museum and its relevance to using museum resources to teach science today. I begin with a discussion of the historical display of race and its relevance to my practice of using the Museum’s resources to teach science. I continue with a critical review of the history of the education department in a natural history museum to demonstrate the historical constitution of current practices of the education department. Using sociocultural constructs around identity formation and transformation, I move to the present with a case study of a teacher who transforms the structure of science education in her classroom and school as a result of her identity transformation and association with a museum-based professional education program.

Mathematical biography and key rhetoric

The intention of this article is to consider the use of narrative and rhetorical inquiry as research methods. I construct a mathematical biography of one elementary teacher trainee, Sirpa, who had performed well in her advanced mathematics course in upper secondary school. I describe her development as a mathematics teacher during teacher education from her second-year methods course and teaching practice to fourth-year teaching practice. Narrative inquiry is more than a case study: Sirpa’s mathematical biography is a story that describes how she constructs her mathematical identity. I also analysed the key rhetoric that Sirpa used in her talk, key rhetoric here referring to the strategy by which she constructed continuity and coherence.     

Communicating feedback in teaching practice supervision in a learning-oriented field experience assessment framework

This article seeks to understand the ways in which feedback was communicated in post-observation conferences in teaching practice supervision within the learning-oriented field experience assessment (LOFEA) framework. 32 post-observation conferences between 21 pairs of supervisors and participants of in-service teacher education programmes, and interviews with supervisors and participants were analyzed, with findings revealed in four themes:

1.

The distribution of content and nature of feedback in post-observation conferences;     

基础阶段英语交际能力培养模式初探——浅谈"6R"互动语言教学法

互动语言教学法能够为学习者创造有意义的语境,从而有助于学习者更好地掌握词汇语法、激发他们内在的学习动力以及培养他们的自主学习能力.互动语言教学法在教学实践中可以归结为1个"W"(Warm-up)和6个"R"(Reading,Responsive work,Role playing,Reward,Report,Revision).     

知己知彼 百战不殆——谈国家安全对外语能力建设的需求

外语的重要战略地位是毋庸置疑的,甚至是克敌制胜的秘密武器。文章从简要介绍美国实施的＂关键语言＂战略入手,试图就我国跨界民族的具体情况,各省市间的经济发展水平、经济结构、历史传统、地缘安全特点等方面的差别,以及中国战略资源通道这三个方面分析我国国家安全对外语能力的需求,并针对我国的＂关键语言＂战略实施提出一些建设性意见,以引起大家对我国国家安全语言的重视。     

浅析政治课教师如何适应高中新课程改革

目前所进行的高中新课程改革,从各方面来看,都可以称为是中国基础教育的革命。它从教材制定、课程设置、课堂教学、教学目标、教学评价等诸多方面都进行了革新。不仅要改变学生的学习模式,而且也将改变教师传统的教育教学模式。通过分析高中思想政治课新课程改革的要求,从转变观念、更新知识储备、实施有效教学策略等方面,提出高中政治课教师如何适应新课程改革的几点建议。