Revealing Hidden Impression Topics in Students' Journals Based on Nonnegative Matrix Factorization.
Yuta TaniguchiDaiki SuehiroAtsushi ShimadaHiroaki OgataPublished in: ICALT (2017)
Keyphrases
- nonnegative matrix factorization
- probabilistic latent semantic indexing
- matrix factorization
- negative matrix factorization
- data representation
- active set
- nonnegative matrix
- conference proceedings
- latent dirichlet allocation
- least squares
- principal component analysis
- topic models
- spectral clustering
- original data
- digital libraries
- sparsity constraints
- keywords
- information retrieval
- document clustering
- semi supervised
- kernel function
- feature space
- objective function
- factor matrices
- computer vision