Bayesian Nonparametric Relational Topic Model through Dependent Gamma Processes
Bayesian Nonparametric Relational Topic Model through Dependent Gamma Processes
复制标题
通过相关伽马过程的贝叶斯非参数关系主题模型
DOI:
10.1109/tkde.2016.2636182
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发表时间:
2017-07
影响因子:
8.9
通讯作者:
Xiangfeng Luo
中科院分区:
文献类型:
--
作者:
Junyu Xuan;Jie Lu;Guangquan Zhang;Richard Yi Da Xu;Xiangfeng Luo
Traditional relational topic models provide a successful way to discover the hidden topics from a document network. Many theoretical and practical tasks, such as dimensional reduction, document clustering, and link prediction, could benefit from this revealed knowledge. However, existing relational topic models are based on an assumption that the number of hidden topics is known a priori, which is impractical in many real-world applications. Therefore, in order to relax this assumption, we propose a nonparametric relational topic model using stochastic processes instead of fixed-dimensional probability distributions in this paper. Specifically, each document is assigned a Gamma process, which represents the topic interest of this document. Although this method provides an elegant solution, it brings additional challenges when mathematically modeling the inherent network structure of typical document network, i.e., two spatially closer documents tend to have more similar topics. Furthermore, we require that the topics are shared by all the documents. In order to resolve these challenges, we use a subsampling strategy to assign each document a different Gamma process from the global Gamma process, and the subsampling probabilities of documents are assigned with a Markov Random Field constraint that inherits the document network structure. Through the designed posterior inference algorithm, we can discover the hidden topics and its number simultaneously. Experimental results on both synthetic and real-world network datasets demonstrate the capabilities of learning the hidden topics and, more importantly, the number of topics.
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DOI:
10.1007/978-3-540-30115-8_22
发表时间:
2004-09
期刊:
--
影响因子:
--
作者:
Bryan Klimt;Yiming Yang
通讯作者:
Bryan Klimt;Yiming Yang
DOI:
--
发表时间:
2012-06
期刊:
ArXiv
影响因子:
--
作者:
Yingjian Wang;L. Carin
通讯作者:
Yingjian Wang;L. Carin
DOI:
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发表时间:
2009-04
期刊:
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影响因子:
--
作者:
Jonathan D. Chang;D. Blei
通讯作者:
Jonathan D. Chang;D. Blei
DOI:
10.5555/1390681.1442798
发表时间:
2007-05
期刊:
Journal of machine learning research : JMLR
影响因子:
--
作者:
E. Airoldi;D. Blei;S. Fienberg;E. Xing
通讯作者:
E. Airoldi;D. Blei;S. Fienberg;E. Xing
影响因子:
1.8
作者:
Fox, Emily B.;Sudderth, Erik B.;Willsky, Alan S.
通讯作者:
Willsky, Alan S.