A two-transistor negative-resistance device without feedback structure. - Jingtang Wu; Jiam-She He; Xiyu Du (Int. J. Circuit Theory Appl., 1990)

Nonessential singularities of the second kind and stability for multidimensional digital filters. - Lizhi Wang; Xiyu Du; Fei Xia (Multidimens. Syst. Signal Process., 1992)

Sufficient conditions for Hurwitz and Schur stabilty of interval matrix polynomials. - Yang Xiao; Rolf Unbehauen; Xiyu Du (ECC, 1999)

Schur stability of polytopes of bivariate polynomials. - Yang Xiao; Rolf Unbehauen; Xiyu Du (ICECS, 1999)

A finite test algorithm for 2D Schur polynomials based on complex Lyapunov equation. - Yang Xiao; Rolf Unbehauen; Xiyu Du (ISCAS (3), 1999)

A necessary condition for Schur stability of 2D polynomials [digital filters]. - Yang Xiao; Rolf Unbehauen; Xiyu Du (ISCAS (3), 1999)