Microwave Class-F InGaP/GaAs HBT Power Amplifier Considering up to 7th-Order Higher Harmonic Frequencies. - Masato Seki; Ryo Ishikawa; Kazuhiko Honjo (IEICE Trans. Electron., 2006)

Multiplicative update for a class of constrained optimization problems related to NMF and its global convergence. - Norikazu Takahashi; Masato Seki (EUSIPCO, 2016)

A unified global convergence analysis of multiplicative update rules for nonnegative matrix factorization. - Norikazu Takahashi; Jiro Katayama; Masato Seki; Jun'ichi Takeuchi (Comput. Optim. Appl., 2018)