基于多维尺度模型的潜在主题可视化研究
A Research on Visualization of Underlying Topics Based on MDS Model
  
中文关键词:潜在主题 可视化 多维尺度模型 数据编码
英文关键词:underlying topics , visualization , multidimensional scaling , data coding
基金项目:国家建设高水平大学公派研究生项目(留金发[ 2011 ] 3005 ) ;国家自然科学基金( 71173249 )
作者单位
赵一鸣 Center for Studies of Information Resources 
张进 School of Information Studies , University of Wisconsin Milwaukee 
黎苑楚 Hubei Provincial Science & Technology Department 
摘要点击次数: 2437
全文下载次数: 124
中文摘要:
      数据库内容结构分析把共词分析方法应用于全文主题发现,但事先选定种子词和统计共现次数等步骤 导致该方法会遗漏很多重要的词汇组合和潜在主题? 本文提出使用词汇集聚理论作为潜在主题可视化的理论基础,跳过事先选定种子词和统计共现矩阵的步骤,把词条表示在转置的向量空间中,通过多维尺度模型( MDS )算法 把词条在转置向量空间中的邻近关系投影到三维空间图上,通过词汇的空间聚类来发现和表示潜在主题;引入数据编码的方法来克服 MDS 可视空间容量的局限,并设计了邻近矩阵?质心邻近矩阵?属性叠加邻近矩阵及三个层次的方法流程? 最后,成功地将三个层次的潜在主题可视化的方法流程应用于计算机应用服务业上市公司的风险识别?
英文摘要:
      Database Tomography analysis applied term co-occurrence method to discover topics in full texts. But it may miss lots of content and topics in the original text set because of its procedure of co-occurrence frequency statistic and pre-selection of seed term. This paper propose to regard lexical cohesion as theoretical basis of underlying topics visualization, skipping the steps of co-occurrence frequency statistic and pre-selection of seed term, to present terms in transposed vector space, to map the proximity of terms in transposed vector space to visual space by Multi-Dimensional Scale (MDS) algorithm, and to discover and present topics by spatial clustering of related terms. Data coding method was introduced to overcome the limitations of MDS visual space area. Terms proximity matrix, centroid proximity matrix, attribute accumulative proximity matrix and according method procedures were developed to construct a three layers method system. Method of underlying topics visualization was successfully applied to do risk identification for public companies of computer application services, using verbal content about risk factor in prospectus as texts collection.
赵一鸣,张进,黎苑楚.基于多维尺度模型的潜在主题可视化研究[J].情报学报,2014,(1):45~54
查看全文  查看/发表评论  下载PDF阅读器
关闭
Copyright © 2008 《情报学报》编辑部 地址:北京市三里河路54号 
邮编:100045 电话:010-68598273,010-68598285 E-mail: qbxb@istic.ac.cn