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Non-Negative Matrix Factorization Based on Alternating Non-Negativity Constrained Least Squares and Active Set Method
(Georgia Institute of Technology, 2007)
Sparse Non-negative Matrix Factorizations via Alternating Non-negativity-constrained Least Squares
(Georgia Institute of Technology, 2006)
Many practical pattern recognition problems require non-negativity constraints. For example, pixels in digital images and chemical concentrations in bioinformatics are non-negative. Non-negative matrix factorization (NMF) ...