动态主题数的主题特征格构建与可视化

Kai Wang, Fuzhi Wang
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引用次数: 0

摘要

摘要动态主题数的主题识别可以实现超参数的动态更新,获得动态主题在时间维度上的概率分布,有助于对流文本数据的清晰理解和跟踪。然而,目前的主题识别模型往往是基于固定数量的主题K,缺乏对主题知识的多粒度分析。因此,不可能在时间序列中深入感知话题的动态变化。在无限潜狄利克雷分配模型的基础上,引入了一种新的方法,构造了动态主题数下的主题特征格。该模型将文档、主题和词汇表联合建模,生成两个概率分布矩阵:文档-主题和主题-特征词。然后,计算主题与其特征词汇之间的关联强度,建立主题形式上下文矩阵。最后,根据形式概念分析(FCA)理论归纳出主题特征。通过与主流方法的对比,在真实数据集上验证动态主题数(TFL_DTN)模型下的主题特征格。实验表明,该模型更符合实际需求,在主题可视化分析的半自动建模中取得了较好的效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Topic-Feature Lattices Construction and Visualization for Dynamic Topic Number
Abstract The topic recognition for dynamic topic number can realize the dynamic update of super parameters, and obtain the probability distribution of dynamic topics in time dimension, which helps to clear the understanding and tracking of convection text data. However, the current topic recognition model tends to be based on a fixed number of topics K and lacks multi-granularity analysis of subject knowledge. Therefore, it is impossible to deeply perceive the dynamic change of the topic in the time series. By introducing a novel approach on the basis of Infinite Latent Dirichlet allocation model, a topic feature lattice under the dynamic topic number is constructed. In the model, documents, topics and vocabularies are jointly modeled to generate two probability distribution matrices: Documents-topics and topic-feature words. Afterwards, the association intensity is computed between the topic and its feature vocabulary to establish the topic formal context matrix. Finally, the topic feature is induced according to the formal concept analysis (FCA) theory. The topic feature lattice under dynamic topic number (TFL_DTN) model is validated on the real dataset by comparing with the mainstream methods. Experiments show that this model is more in line with actual needs, and achieves better results in semi-automatic modeling of topic visualization analysis.
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