Non-Negative Matrix Factorization of a set of Economic Time Series with Graph Based Smoothing of Basis Vectors and Sparseness of the Coefficients Ueda, Michiaki DOI 10.17023/6bea-bg05 SMCS Members: Free IEEE Members: $11.00 Non-members: $15.00 11 Oct 2020 Tags: smc society conference systems smcs 2020 cybernetics