Hierarchical online NMF for detecting and tracking topic hierarchies in a text stream

作者：

Highlights：

• Propose an efficient hierarchical NMF framework-HONMF.

• Propose a mechanism to adaptively determine the topic numbers.

• Propose a mechanism to evolve the topic hierarchy.

• Propose a mechanism to adaptively determine the topic numbers.

摘要

•Propose an efficient hierarchical NMF framework-HONMF.•Propose a mechanism to adaptively determine the topic numbers.•Propose a mechanism to evolve the topic hierarchy.•Propose a mechanism to adaptively determine the topic numbers.

论文关键词：Topic modeling,Hierarchical matrix factorization,Online learning

论文评审过程：Received 23 September 2016, Revised 12 October 2017, Accepted 4 November 2017, Available online 6 November 2017, Version of Record 13 November 2017.

论文官网地址：https://doi.org/10.1016/j.patcog.2017.11.002