arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.06112cs.LGstat.ML
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一种适用于短噪声文本流的图卷积主题模型

A Graph Convolutional Topic Model for Short and Noisy Text Streams

Hanoi University of Science and Technology(河内科技大学)

Ngo Van Linh, Tran Xuan Bach, Khoat Than

摘要:

从数据流中学习隐藏的主题已经成为绝对必要的,但提出了具有挑战性的问题,如概念漂移以及短和嘈杂的数据。利用先验知识丰富主题模型是应对这些挑战的潜在解决方案之一。从人类知识(例如Wordnet)或预先训练的模型(例如Word2vec)中获得的先验知识对于帮助主题模型更好地工作非常有价值和有用。然而,在流媒体环境中,数据到达连续和无限,现有的研究仅限于有效地利用这些资源。特别地,包含有意义的词关系的知识图谱被忽略。在本文中,旨在有效地利用知识图谱,我们提出了一种新的图卷积主题模型(GCTM),它集成了图卷积网络(GCN)到一个主题模型和学习方法,学习网络和主题模型同时为数据流。在每一个小批量中,我们的方法不仅可以利用外部的知识图谱,但也可以平衡的外部和旧的知识表现良好的新数据。我们进行了大量的实验,以评估我们的方法与人类知识图谱(Wordnet)和从预先训练的词嵌入(Word2vec)构建的图。实验结果表明,我们的方法取得了显着更好的性能比国家的最先进的基线方面的概率预测措施和主题一致性。特别是,我们的方法可以很好地处理短文本以及概念漂移。GCTM的实施可在\url{https://github.com/bachtranxuan/GCTM.git}上获得。

英文摘要:

Learning hidden topics from data streams has become absolutely necessary but posed challenging problems such as concept drift as well as short and noisy data. Using prior knowledge to enrich a topic model is one of potential solutions to cope with these challenges. Prior knowledge that is derived from human knowledge (e.g. Wordnet) or a pre-trained model (e.g. Word2vec) is very valuable and useful to help topic models work better. However, in a streaming environment where data arrives continually and infinitely, existing studies are limited to exploiting these resources effectively. Especially, a knowledge graph, that contains meaningful word relations, is ignored. In this paper, to aim at exploiting a knowledge graph effectively, we propose a novel graph convolutional topic model (GCTM) which integrates graph convolutional networks (GCN) into a topic model and a learning method which learns the networks and the topic model simultaneously for data streams. In each minibatch, our method not only can exploit an external knowledge graph but also can balance the external and old knowledge to perform well on new data. We conduct extensive experiments to evaluate our method with both a human knowledge graph (Wordnet) and a graph built from pre-trained word embeddings (Word2vec). The experimental results show that our method achieves significantly better performances than state-of-the-art baselines in terms of probabilistic predictive measure and topic coherence. In particular, our method can work well when dealing with short texts as well as concept drift. The implementation of GCTM is available at \url{https://github.com/bachtranxuan/GCTM.git}.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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