Differential Topic Models
نویسندگان
چکیده
منابع مشابه
Exploring Differential Topic Models for Comparative Summarization of Scientific Papers
This paper investigates differential topic models (dTM) for summarizing the differences among document groups. Starting from a simple probabilistic generative model, we propose dTM-SAGE that explicitly models the deviations on group-specific word distributions to indicate how words are used differentially across different document groups from a background word distribution. It is more effective...
متن کاملTopic Models
with the most likely topic assignments FIGURE 4. The analysis of a document from Science. Document similarity was computed using Eq. (4); topic words were computed using Eq. (3). the assignment of words to topics in the abstract of the article, and the top ten most similar articles. 3. POSTERIOR INFERENCE FOR LDA The central computational problem for topic modeling with LDA is approximating the...
متن کاملTopic Models
Here, K is the number of components in the mixture model. For each k, f(x; θk) is the pdf of component number k. The scalar αk is the proportion of component number k. The specific topic model we consider is called latent Dirichlet allocation (LDA). (The same abbreviation is also used for linear discriminant analysis, which is unrelated.) LDA is based on the intuition that each document contain...
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The Latent Dirichlet Allocation topic model of Blei, Ng, & Jordan (2003) is well-established as an effective approach to recovering meaningful topics of conversation from a set of documents. However, a useful analysis of user-generated content is concerned not only with the recovery of topics from a static data set, but with the evolution of topics over time. We employ a compound topic model (C...
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We explore how the unsupervised extraction of topic-related keywords benefits from combining multiple topic models. We show that averaging multiple topic models, inferred from different corpora, leads to more accurate keyphrases than when using a single topic model and other state-of-the-art techniques. The experiments confirm the intuitive idea that a prerequisite for the significant benefit o...
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ژورنال
عنوان ژورنال: IEEE Transactions on Pattern Analysis and Machine Intelligence
سال: 2015
ISSN: 0162-8828,2160-9292
DOI: 10.1109/tpami.2014.2313127