Discovering dynamic patterns of urban space via semi-nonnegative matrix factorization.
Zhicheng LiuJun CaoJunyan YangQiao WangPublished in: IEEE BigData (2017)
Keyphrases
- nonnegative matrix factorization
- matrix factorization
- probabilistic latent semantic indexing
- negative matrix factorization
- spectral clustering
- data representation
- principal component analysis
- least squares
- data mining techniques
- sparsity constraints
- active set
- computer vision
- semi supervised
- text mining
- nonnegative matrix