Subharmonic entrainment of frequency in nonlinear three-phase circuits with symmetry. - Kohshi Okumura; Naofumi Miyamoto (ISCAS, 1993)

A Method for Solving Complex Linear Equation of AC Network by Interval Computation. - Kohshi Okumura; Satoru Higashino (ISCAS, 1994)

An application of Groebner bases to the classification of nonlinear circuits. - Kohshi Okumura (SIGSAM Bull., 1997)

The Contribution of T. Sunaga to Interval Analysis and Reliable Computing. - Svetoslav Markov; Kohshi Okumura (SCAN, 1998)

Steady states prediction in nonlinear circuit by wavelet transform. - Takashi Hisakado; Kohshi Okumura (ISCAS (6), 1999)

Algebraic representation of bifurcations in global parameter space with Gröbner bases. - Takashi Hisakado; Kohshi Okumura (ISCAS (3), 2001)

Hardware implementation of Moore test on FPGA. - Takushi Hisakado; Tsuneto Nishimura; Kohshi Okumura (ISCAS (1), 2002)

Fault location of single-phase transmission lines by Laguerre function. - A. Yonemoto; Takashi Hisakado; Kohshi Okumura (ISCAS (1), 2002)

An improvement of convergence of FFT-based numerical inversion of Laplace transforms. - A. Yonemoto; Takashi Hisakado; Kohshi Okumura (ISCAS (5), 2002)

Characterization of a simple communication network using Legendre transform. - Takashi Hisakado; Kohshi Okumura; Vladimir Vukadinovic; Ljiljana Trajkovic (ISCAS (3), 2003)

Estimation of transmission line parameters by adaptive inverse scattering. - A. Yonemoto; Takashi Hisakado; Kohshi Okumura (ISCAS (4), 2003)

An implementation of numerical inversion of Laplace transforms on FPGA. - A. Yonemoto; Takashi Hisakado; Kohshi Okumura (ISCAS (4), 2003)

Logically reversible arithmetic circuit using pass-transistor. - Takashi Hisakado; Hiroyoshi Iketo; Kohshi Okumura (ISCAS (2), 2004)

Moore test using Gray code. - Takashi Hisakado; Kohshi Okumura (ISCAS (3), 2005)

Algebraic representation of error bounds for describing function using Groebner base [nonlinear circuit analysis example]. - Masakazu Yagi; Takashi Hisakado; Kohshi Okumura (ISCAS (3), 2005)

An Algebraic Approach to Guarantee Harmonic Balance Method Using Gröbner Base. - Masakazu Yagi; Takashi Hisakado; Kohshi Okumura (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

An approach to all modes of nonlinear oscillations in three-phase circuits by computer algebra system. - Kohshi Okumura (APCCAS, 2012)

Finding all modes of nonlinear oscillations by the Krawczyk-Moore-Jones algorithm. - Kohshi Okumura (ISCAS, 2012)