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      Lifelong Machine Learning

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      Synthesis Lectures on Artificial Intelligence and Machine Learning
      Morgan & Claypool Publishers LLC

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              Finding scientific topics.

              A first step in identifying the content of a document is determining which topics that document addresses. We describe a generative model for documents, introduced by Blei, Ng, and Jordan [Blei, D. M., Ng, A. Y. & Jordan, M. I. (2003) J. Machine Learn. Res. 3, 993-1022], in which each document is generated by choosing a distribution over topics and then choosing each word in the document from a topic selected according to this distribution. We then present a Markov chain Monte Carlo algorithm for inference in this model. We use this algorithm to analyze abstracts from PNAS by using Bayesian model selection to establish the number of topics. We show that the extracted topics capture meaningful structure in the data, consistent with the class designations provided by the authors of the articles, and outline further applications of this analysis, including identifying "hot topics" by examining temporal dynamics and tagging abstracts to illustrate semantic content.
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                Author and article information

                Journal
                Synthesis Lectures on Artificial Intelligence and Machine Learning
                Synthesis Lectures on Artificial Intelligence and Machine Learning
                Morgan & Claypool Publishers LLC
                1939-4608
                1939-4616
                November 07 2016
                November 07 2016
                : 10
                : 3
                : 1-145
                Article
                10.2200/S00737ED1V01Y201610AIM033
                dd735f03-b192-4c0d-83f1-9076d42c3323
                © 2016
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