| 情报元评价模型理论研究综述 |
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| 引用本文： | 宋宇红.情报元评价模型理论研究综述[J].情报学报,2010,29(2). |
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| 作者姓名： | 宋宇红 |
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| 作者单位： | 浙江纺织服装学院图书馆,宁波,315211 |
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| 摘 要： | 全面总结了引文系统情报元评价的几种模型的研究成果.探讨了在引文系统中形象地引用有向赋权图的必要性、可行性及途径.在运用有向赋权图刻画引文深层关系基础上,比较了评价情报元地位的简单统计法、特征指数方法、总和指数方法、加权统计法.指出了简单统计法存在"假定地位平等又计算地位不等"的悖论,证明了后三种方法的等价性.并且在本原连通的条件下,回答了后三种方法的存在性、唯一性、初值无关性等理论问题.通过实例对几种评价模型的计算对照,计算验证了后三种方法的计算结果相同,但是迭代速度稍有不同,以加权统计法精度较好.
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| 关 键 词： | 情报元 评价模型 特征向量 |
Review on Theoretical Research for Evaluation Model of Information Elements |
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| Song Yuhong.Review on Theoretical Research for Evaluation Model of Information Elements[J].Journal of the China Society for Scientific andTechnical Information,2010,29(2). |
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| Authors: | Song Yuhong |
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| Institution: | Library of Zhejiang Textile & Fashion College/a>;Ningbo 315211 |
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| Abstract: | Survey the studing results for evaluating model of information elements in citation system.Discuss necessary and feasibility and way to introduce weight digraph in complex citation system.It is very formal model.By weight digraph described the relations of citations.In the base,compare several methods of the simple statistic,eigenvector index,total sum index and weight statistic index.Show it is a paradox that to compute difference of the status used by supposal of status equality in the simple statistic.Pr... |
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| Keywords: | information sources evaluating model eigenvector |
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