%0 Journal Article
%T Modeling and Analyzing Topic Evolution<br>一种话题演化建模与分析方法
%A HU Yan-Li
%A BAI Liang
%A ZHANG Wei-Ming
%A <br>胡艳丽
%A 白亮
%A 张维明
%J 自动化学报
%D 2012
%I 
%X Topic evolution of network public opinions is investigated. By treating topics as a set of correlated sub-topics, a topic evolution model is proposed, consisting of sub-topic detection and correlation analysis. Furthermore, a sub-topic detection algorithm based on OLDA is presented with Bayesian model selection for the appropriate topic numbers and parameters estimation via Gibbs sampling. The correlations are further defined for analysis of topic evolution, including emergence, extinction, development, merge and split of sub-topics. The method is experimentally verified to be efficient for detecting topic evolution of network public opinions.
%K Topic evolution
%K online latent Dirichlet allocation (OLDA)
%K model selection
%K Gibbs sampling
%K relative entropy
%K correlation analysis<br>话题演化
%K OLDA
%K 模型
%K 模型选择
%K Gibbs
%K 抽样
%K 相对熵
%K 关联分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=E76622685B64B2AA896A7F777B64EB3A&aid=21CB0722CA48644F5E3EF5AB53AC7A79&yid=99E9153A83D4CB11&vid=16D8618C6164A3ED&iid=F3090AE9B60B7ED1&sid=721F8E311AAA0176&eid=A87AC493625B15AF&journal_id=0254-4156&journal_name=自动化学报&referenced_num=0&reference_num=25