Hierarchical online NMF for detecting and tracking topic hierarchies in a text stream.
Ding TuLing ChenMingqi LvHongyu ShiGencai ChenPublished in: Pattern Recognit. (2018)
Keyphrases
- information retrieval
- topic hierarchies
- text collections
- text data
- text mining
- negative matrix factorization
- document collections
- text retrieval
- nonnegative matrix factorization
- information retrieval systems
- topic hierarchy
- textual data
- website
- document clustering
- retrieval systems
- unsupervised learning
- text classification
- consensus clustering
- data mining
- structured data
- wordnet
- high dimensional