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We consider the problem of computing suboptimal feedback switching controllers for discrete dynamical systems. The paper shows how to combine convex optimization techniques with relaxed dynamic programming. We apply the method to several problems that have been considered recently in the literature. A particularly interesting example is given by a DC-DC converter. The proposed algorithm has severa
In this paper we study the propagation problem of a time harmonic electromagnetic field inside a cavity filled with a generic bianisotropic medium. We define the concepts of eigenfrequencies and modes of the cavity and we propose a method to prove their existence and countability. We extend, in this respect, the theory for the isotropic, homogeneous, lossless cavity.
We tested three models of the underpinnings of political ideology, in Sweden and Italy, addressing: (1)political values, with underlying core values and traits, (2) right-wing authoritarianism and social dominance orientation, with underlying traits and worldviews, and (3) attitudes to change, equality, and the system, with underlying motivations.
African women farmers do not always benefit from and are sometimes adversely affected by the introduction of new technologies, including high-yielding varieties and their often-associated improved management systems. This paper seeks to further this claim in the wake of what has been referred to as "the NERICA Revolution" in Uganda, by providing an illustration of the impact the introduction of NE
Short presentation taken from one of the chapters of my dissertation
We derive asymptotically exact results for the charge and spin densities far away from finite systems (atoms and molecules) and far outside solid surfaces. These results are then used to obtain the correct asymptotic form of the exchange-correlation potential of density-functional (DF) theory and to prove that, for all systems, the eigenvalue of the uppermost occupied DF orbital equals the exact i
Abstract is not available.
This article gives a presentation of the Automatic Gain Control algorithm used in WCDMA (3rd generation mobile networks). The focus is on how the controller bandwidth influences settling times and modulation distortion. This will be investigated through simulation for two different channel cases.
The problem of solving linear equations in a non-commutative algebra is in general a highly non-trivial matter. Even in the case of finitely presented algebras, there is no general algorithms for solving seemingly simple equations of the type a X = X b for some elements a and b. In this paper we will demonstrate a method by which it is possible to find all the solutions to linear equations in cer
