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–This paper proposes the Predictive Direct Power Control (P-DPC), a new control approach where the well-known direct power control (DPC) is combined with a predictive selection of a voltage-vectors sequence, obtaining both high transient dynamic and constant switching frequency. Two different P-DPC versions are developed based on two different types of(More)
In order to classify resources, digital libraries have traditionally used different types of lexical ontologies, which describe the terminology used in an area of knowledge. This paper analyzes how lexical ontologies covering different areas of knowledge can be merged to generate an enriched urban terminology. This work proposes a method to combine these(More)
The paper presents a model for motion generation of differential-drive mobile robots. The parameters of the dynamic model allow adjusting the robot translational and rotational behaviours separately. The model takes into account the robot kinematic and dynamic constraints, making the velocities and accelerations bounded and compatible with those the robot(More)
This paper presents a novel strategy, optimized by genetic algorithms, to control stand-alone hybrid renewable electrical systems with hydrogen storage. The strategy optimizes the control of the hybrid system minimizing the total cost throughout its lifetime. The optimized hybrid system can be composed of renewable sources (wind, PV and hydro), batteries,(More)
  • Monica Hernandeza, Rosario Barrenab, Gabriel Hernandezb, Guillermo Sapiroc, Alejandro F. Frangia, Maria de Luna
  • 2003
Knowledge of brain aneurysm dimensions is essential during the planning stage of minimally invasive surgical interventions using Guglielmi Detachable Coils (GDC). These parameters are obtained in clinical routine using 2D Maximum Intensity Projection images from Computed Tomographic Angiography (CTA). Automated quantification of the three dimensional(More)
Aiming to reach a desired final state from a given initial one, this paper addresses the minimum-time decentralized control of Choice-Free continuous Petri nets. It is assumed that the original system is cut into disconnected subsystems by a set of places (buffers). Local control laws are first computed independently in subsystems, based on which the(More)
Commercial or wide-network deployment of Mobile Agent Systems is not possible without satisfying security architecture. In this paper we propose architecture for secure Mobile Agent Systems, using Trusted Domains and Proxy agents. Existing approaches are based on security services at the level of an agent system, library or specific objects. Our concept(More)
In this paper we consider a general sequence of orthogonal Laurent polynomials on the unit circle and we first study the equivalences between recurrences for such families and Szeg˝ o's recursion and the structure of the matrix representation for the multiplication operator in Λ when a general sequence of orthogonal Laurent polynomials on the unit circle is(More)
The creation and rendering of realistic water scenes is one of the challenging tasks in Computer Graphics. To reproduce the illumination and colour inside water bodies an algorithm capable of dealing with media with anisotropic and multiple scattering has to be used. We have developed a simulation system based in the discrete ordinates method to solve the(More)
This paper addresses the decentralized control of large scale systems modeled with timed continuous Marked Graphs (ContM G). Decentralized structures are first obtained by decomposing the system into subnets by cutting the original net through sets of places, and adding marking structurally implicit places. Then, first local control laws are computed(More)