在地理教学中应培养学生读绘地图的能力

在地理教学中，培养学生读绘地图的能力十分重要，应指导其读图、析图、绘图，使学生掌握绘制剖面图、柱状图、曲线图、析线图等一些简单示意图的方法。     

概念地图在地理教学中的应用

本文介绍了概念地图的定义、要素和类型,以及概念地图绘制的主要方法和基本步骤,并结合新地理课程标准和人教版教材的相关教学内容,以具体的教学案例,论述了巧妙利用概念地图来组织教学过程,优化中学地理教学,发挥其在帮助学生识别和记忆相关概念,加深学生对基础理论的理解和掌握,促进提高学生的探究意识和学习能力等方面的积极作用。     

Effects of Web-based Support for the Construction of Competence Maps

Educationalists experience difficulties with the construction of competence maps that describe final attainment levels of educational programs. Web-based support was developed with three supportive aids: A construction kit, a phenomenarium, and an information bank. Each supportive aid was expected to improve perceived process and product quality as well as learning. In a full factorial experiment, 266 educational science students constructed a competence map, whether or not supported by different combinations of the three supportive aids. The availability of the construction kit and the phenomenarium had positive effects on perceived process quality and learning. Furthermore, if there was no phenomenarium with example materials, the absence of the construction kit greatly diminished experienced support (i.e., one aspect of process quality); if a phenomenarium was present, the availability of the construction kit had relatively little effect on perceived support. In general, this study indicates that well-designed Web-based support helps to construct competence maps. in final form: 2 February 2006     

A New Marketing Paradigm for Electronic Commerce

The World Wide Web possesses unique characteristics that distinguish it in important ways from traditional commercial communications environments. Because the Web presents a fundamentally different environment for marketing activities than traditional media, conventional marketing activities are becoming transformed, as they are often difficult to implement in their present form. In this article, we discuss the idea that these changes portend an evolution in the 'marketing concept' and argue that in order for marketing efforts to be successful in this new medium, a new business paradigm is required. In this new approach, the marketing function must be reconstructed to facilitate electronic commerce in the emerging electronic society underlying the Web.     

21世纪情报学研究初探

文章论述了情报学的学科定位,研究视角、思维范式等观念的转变以及21世纪情报学的几个重要研究课题.     

在数字图书馆理论研究中引入数字图书馆学概念初探

本文探讨了在数字图书馆理论研究中导人数字图书馆学概念的必要性，简要论述了数字图书馆学的概念以及数字图书馆学研究的内容。     

知识空间:知识组织的概念基础

文章从情报组织和知识组织的具体化出发 ,提出了“知识空间”这样一个知识组织的新的概念基础。探讨了可在多维空间中表示的知识领域的“概念向量”、基于对这些概念理解的个人“状态向量”、包括知识子空间的检索系统中可能存在情报项的“表示向量”、用户扩检或缩检子空间的“检索体积”,以及这一新概念意义。参考文献 1 1     

信息资源管理与知识管理的概念探讨

目前 ,关于信息资源管理和知识管理的概念比较混乱。不妨把管理科学中信息资源管理概念统称为信息资源化管理 ,以强调利用信息资源进行管理 ;把图书情报学中的知识管理统称为知识资源管理 ,以突出对知识资源的管理技术的研究。参考文献 12。     

Improving document clustering in a learned concept space

Most document clustering algorithms operate in a high dimensional bag-of-words space. The inherent presence of noise in such representation obviously degrades the performance of most of these approaches. In this paper we investigate an unsupervised dimensionality reduction technique for document clustering. This technique is based upon the assumption that terms co-occurring in the same context with the same frequencies are semantically related. On the basis of this assumption we first find term clusters using a classification version of the EM algorithm. Documents are then represented in the space of these term clusters and a multinomial mixture model (MM) is used to build document clusters. We empirically show on four document collections, Reuters-21578, Reuters RCV2-French, 20Newsgroups and WebKB, that this new text representation noticeably increases the performance of the MM model. By relating the proposed approach to the Probabilistic Latent Semantic Analysis (PLSA) model we further propose an extension of the latter in which an extra latent variable allows the model to co-cluster documents and terms simultaneously. We show on these four datasets that the proposed extended version of the PLSA model produces statistically significant improvements with respect to two clustering measures over all variants of the original PLSA and the MM models.     

唐诗英译的意象图式概念识解运作——以《送孟浩然之广陵》英译本为例

意象图式理论是认知语言学的研究热点之一。分析意象图式的形成过程以及对意象图式进行概念化识解,有助于我们更好地理解及应用认知语言学。本文试讨论意象图式的概念识解操作,并通过对李白诗作《送盂浩然之广陵》及其英译本的对比分析来探讨这一理论对汉诗英译的解释力。