In this article, we propose sampled-data H design of digital filters that cancel the continuous-time effect of coupling waves in a single-frequency full-duplex relay station. In this study, we model a relay station as a continuous-time system while conventional researches treat it as a discrete-time system. For a continuous-time model, we propose digital feedforward and feedback cancelers based...

Evolution as a metaphor borrowed from nature can be used to describe a design process. However, this has generally been applied to the evolution of a solution which assumes the problem does not change throughout the process. This is a naive assumption in design because the problem indeed changes. This paper considers the evolution of both the problem and solution and introduces co-evolutionary ...

We found that the differential topology of the lattice-system Ising model determines whether there can be the continuous phase transition, The geometric topology of the space the lattice-system is embedded in determines whether the system can become ordered. If the system becomes ordered it may not admit the continuous phase transition. The spin-projection orientations are strongly influenced b...

Modeling and control of hybrid systems, with particular emphasis on process control applications, are considered in this article. Based on a number of observations on typical mixed discrete and continuous features for such applications, a fairly general model structure for hybrid systems is proposed. This model structure, which clearly separates the open loop plant from the closed loop system, ...