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In citation network analysis, complex behavior is reduced to a simple edge, namely, node A cites node B. The implicit assumption is that A is giving credit to, or acknowledging, B. It is also the case that the contributions of all citations are treated equally, even though some citations appear multiply in a text and others appear only once. In this study, we apply text-mining algorithms to a relatively large dataset (866 information science articles containing 32,496 bibliographic references) to demonstrate the differential contributions made by references. We (1) look at the placement of citations across the different sections of a journal article, and (2) identify highly cited works using two different counting methods (CountOne and CountX). We find that (1) the most highly cited works appear in the Introduction and Literature Review sections of citing papers, and (2) the citation rankings produced by CountOne and CountX differ. That is to say, counting the number of times a bibliographic reference is cited in a paper rather than treating all references the same no matter how many times they are invoked in the citing article reveals the differential contributions made by the cited works to the citing paper. 相似文献
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写作成果教学法是长期垄断英语写作教学的一种传统方法，在我国写作教学中影响颇具。然而，随着对英语学习者写作能力要求的提高，不足之处已日渐暴露。为此，本文借鉴国外写作过程教学法，通过对本校英语专业40名学生所做的研究统计结果验证，提出以内容为中心的写作教学思路，强调阅读输入，提高学生英语写作水平。 相似文献
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信息过滤技术在数字图书馆的应用 总被引：10，自引：1，他引：10
信息过滤技术将在数字图书馆个性化服务中起重要作用。可以构建一个基于信息过滤技术的数字图书馆模型。它主要包括信息检索模块和信息过滤模块。图1。参考文献4。 相似文献
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大量图像信息的产生使得基于内容的图像检索技术成为研究热点.由于颜色特征具有稳定性和计算简单的特点,本文首先介绍了利用全局颜色直方图进行图像检索的基本思想,然后分析了它的局限性,并给出了改进的方法:特征提取采用结合空间信息的颜色一致向量方法.在特征度量时,依据所设计的评价实验,对这两种方法进行了比较,并给出了实验结果和图像检索性能的评价.实验表明,所述的图像检索方法具有较好的查全率和查准率. 相似文献