Ara es mostren els items 5972-5991 de 94725

  • An accurate and Verilog-A compatible compact model for graphene field-effect transistors 

    Landauer, Gerhard Martin; González Jiménez, José Luis; Jiménez Jiménez, David (2014-06-04)
    Article
    Accés restringit per política de l'editorial
    The present paper provides an accurate drift-diffusion model of the graphene field-effect transistor (GFET). A precise yet mathematically simple current-voltage relation is derived by focusing on device physics at energy ...
  • An accurate FIC-FEM formulation for the 1D convection-diffusion-reaction equation 

    Oñate Ibáñez de Navarra, Eugenio; Miquel Canet, Juan; Nadukandi, Prashanth (2016-01)
    Article
    Accés restringit per política de l'editorial
    In this paper we present an accurate stabilized FIC-FEM formulation for the 1D advection-diffusion-reaction equation in the exponential and propagation regimes using two stabilization parameters. Both the steady-state and ...
  • An acoustic valve within the nose of sperm whales Physeter macrocephalus 

    Huggenberger, Stefan; André, Michel; Oelschläger, Helmut A. (2014-04-01)
    Article
    Accés restringit per política de l'editorial
    Sperm whales Physeter macrocephalus emit impulsive sound signals in short series of rhythmic clicks (codas) for communication, and in long series of single acoustic events (usual clicks) for echolocation. Both click types ...
  • An acousto-ultrasonics pattern recognition approach for damage detection in wind turbine structures 

    Anaya Vejar, Maribel; Tibaduiza Burgos, Diego Alexander; Forero, Edwin; Castro, Rafael; Pozo Montero, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Comunicació de congrés
    Accés obert
    The design of a Structural Health Monitoring (SHM) systems is a requirement in the task of improving the safety and maintainability of the structures. Among the multiple techniques available for health monitoring, ...
  • An active power self-synchronizing controller for grid-connected converters emulating inertia 

    Remón, D.; Mir Cantarellas, Antonio; Rakhshani, Elyas; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Renewable energy sources are increasing their penetration in power systems, making necessary new control systems that offer services usually provided only by conventional generators. In this paper, an active power controller ...
  • An active power synchronization control loop for grid-connected converters 

    Remón, D.; Mir Cantarellas, Antonio; Rakhshani, Elyas; Candela García, José Ignacio; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The increasing penetration of renewable energy sources in power systems requires new control systems that provide services similar to those of conventional generators. This paper proposes an active power controller that ...
  • An active power synchronizing controller for grid-connected power converters with configurable natural droop characteristics 

    Zhang, Weiyi; Luna Alloza, Álvaro; Candela García, José Ignacio; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro (2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Improving the dynamics of the widely applied gridconnected power converters has been drawing a lot of interests in recent years. Since the currently installed grid-connected converters doesn’t shown inertia effect in power ...
  • An adaptative deterministic sequence for sampling-based motion planners 

    Rosell Gratacòs, Jan; Iñíguez Galbete, Pedro (2004-09)
    Report de recerca
    Accés obert
    This paper presents a deterministic sequence with good and useful features for sampling-based motion planners, On the one hand, the proposed sequence is able to generate samples over a hierarchical grid structure of the ...
  • An adaptative fuzzy logic enhancer for rejection of narrowband interference in DS-Spread Spectrum 

    Pérez Neira, Ana Isabel; Antón Haro, Carles; Lagunas Hernandez, Miguel A. (1998)
    Text en actes de congrés
    Accés obert
    This work develops a novel adaptive fuzzy line enhancer that, based on a fuzzy basis function expansion, successfully solves the non-linear problem of narrowband interference estimation and rejection in direct sequence-spread ...
  • An adaptative user interface for genealogical document transcription 

    Mayol Sarroca, Enric (Information Science Reference, 2011)
    Capítol de llibre
    Accés restringit per política de l'editorial
    Lately, genealogy has become a hobby not only in the United States, UK or France but also in many other countries where it is now widespread. The main sources of information for genealogists are different kinds of genealogical ...
  • An Adaptive algorithm to compute the medial axis transform of 2-D polygonal domains 

    Joan Arinyo, Robert; Pérez Vidal, Lluís; Gargallo Monllau, Elies (1995-10)
    Report de recerca
    Accés obert
    An adaptive algorithm to compute the medial axis transform of 2D polygonal domains with arbitrary genus is presented. The algorithm is based on the refinement of a coarse medial axis transform by subdividing the domain ...
  • An adaptive control strategy for postural stability using a wearable robot 

    Rajasekaran, Vijaykumar; Aranda López, Juan; Casals Gelpi, Alicia; Pons, Jose Luis (2015-11)
    Article
    Accés restringit per política de l'editorial
    Wearable robots are expected to expand the use of robotics in rehabilitation since they can widen the assistance application context. An important aspect of a rehabilitation therapy, in terms of lower extremity assistance, ...
  • An adaptive controller for bilateral teleoperators: transatlantic experiments using the internet 

    Nuño Ortega, Emmanuel; Basañez Villaluenga, Luis; de Alba Padilla, Carlos; López Franco, Carlos (2012)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    A bilateral teleoperator is composed of a local and a remote manipulators interconnected through a communication channel. A human operator interacts with the local manipulator to remotely execute a given task via the ...
  • An adaptive controller for nonlinear teleoperators with variable time-delays 

    Sarras, Ioannis; Nuño, Emmanuel; Basañez Villaluenga, Luis (2014-10-01)
    Article
    Accés restringit per política de l'editorial
    In most real-life bilateral teleoperators the available physical parameters are uncertain and the communications exhibit variable time-delays. In order to confront these situations and only assuming that a bound of the ...
  • An Adaptive Cutaway with Volume Context Preservation 

    Grau Carrion, Sergi; Puig Puig, Anna (Springer Berlin / Heidelberg, 2009-11-26)
    Capítol de llibre
    Accés restringit per política de l'editorial
    Knowledge expressiveness of scientific data is one of the most important visualization goals. However, current volume visualization systems require a lot of expertise from the final user. In this paper, we present a ...
  • An adaptive design of an all-zero spectral estimator 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Institute of Electrical and Electronics Engineers (IEEE), 1981)
    Text en actes de congrés
    Accés obert
  • An adaptive fixed-mesh ALE method for free surface flows 

    Baiges Aznar, Joan; Codina, Ramon; Pont Ribas, Arnau; Castillo, Ernesto (2017-01-01)
    Article
    Accés obert
    In this work we present a Fixed-Mesh ALE method for the numerical simulation of free surface flows capable of using an adaptive finite element mesh covering a background domain. This mesh is successively refined and unrefined ...
  • An adaptive gradient-search based algorithm for discriminative training of hmm's 

    Nogueiras Rodríguez, Albino; Mariño Acebal, José Bernardo; Monte Moreno, Enrique (Robert H. Mannel and Jordi Robert-Ribes, 1998)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Although having revealed to be a very powerful tool in acoustic modelling, discriminative training presents a major drawback: the lack of a formulation guaranteeing convergence in no matter which initial conditions, such ...
  • An adaptive ISMA-DS/CDMA MAC protocol for third-generation mobile communications systems 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-11)
    Article
    Accés obert
    In this paper, an inhibit sense multiple access–direct sequence/code division multiple access (ISMA-DS/CDMA) medium access control protocol for a packet transmission mobile radio network is presented. The main feature ...
  • An adaptive meshfree method for phase-field models of biomembranes. Part I: Approximation with maximum-entropy basis functions 

    Peco Regales, Christian; Arroyo Balaguer, Marino; Rosolen, Adrian Martin (2013-09)
    Article
    Accés restringit per política de l'editorial
    We present an adaptive meshfree method to approximate phase-field models of biomembranes. In such models, the Helfrich curvature elastic energy, the surface area, and the enclosed volume of a vesicle are written as functionals ...