Ara es mostren els items 5491-5510 de 87955

  • 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 ...
  • An adaptive meshfree method for phase-field models of biomembranes. Part II: A Lagrangian approach for membranes in viscous fluids 

    Peco Regales, Christian; Arroyo Balaguer, Marino; Rosolen, Adrian Martin (2013-09)
    Article
    Accés restringit per política de l'editorial
    We present a Lagrangian phase-field method to study the low Reynolds number dynamics of vesicles embedded in a viscous fluid. In contrast to previous approaches, where the field variables are the phase-field and the fluid ...
  • An adaptive multiresolution method for speckle noise reduction in synthetic aperture radar images 

    Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    This paper introduces a method for speckle noise reduction based on multiresolution algorithms and a new adaptive approach. It combines the characteristics for additive noise reduction of soft thresholding with the ...
  • An adaptive predictive approach for river level forecasting 

    Aguilar, Jose Vicente; Langarita, Pedro; Linares, Lorenzo; Gómez Valentín, Manuel; Rodellar Benedé, José (IEEE, 2011)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Efficient flood management requires accurate real time forecasts to allow early warnings, real time control of hydraulics structures or other actions. Commercially available computing tools typically use, for flow or level ...
  • An adaptive prefiltering method to improve the speed/accuracy tradeoff of voltage sequence detection methods under adverse grid conditions 

    Matas Alcalá, José; Castilla Fernández, Miguel; Miret Tomàs, Jaume; García de Vicuña Muñoz de la Nava, José Luis; Guzmán Solà, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2013-07-23)
    Article
    Accés restringit per política de l'editorial
    This paper deals with the improvement of the transient response and harmonic, subharmonic, and dc-offset voltage rejection capability of a grid voltage sequence detection scheme based on a second-order generalized integrator ...
  • An adaptive pyramid image coding system 

    Torres Urgell, Lluís; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 1988)
    Text en actes de congrés
    Accés obert
    The Laplacian Pyramid is a new and efficient method for image encoding. The method is of increasing interest as band-pass pyramids and multiresolution images are being used in other image processing applications. The Pyramid ...
  • An adaptive remeshing procedure for proximity maneuvering spacecraft formations 

    Garcia Taberner, Laura; Masdemont Soler, Josep (2012)
    Article
    Accés obert
    We consider a methodology to optimally obtain reconfigurations of spacecraft formations. It is based on the discretization of the time interval in subintervals (called the mesh) and the obtainment of local solutions on ...
  • An adaptive scheme for wheelchair navigation collaborative control 

    Urdiales García, Cristina; Peula, José Ma.; Barrué Subirana, Cristian; Cortés García, Claudio Ulises; Sandoval, Francisco; Caltagirone, Carlo; Annicchiarico, Roberta (AAAI Press. Association for the Advancement of Artificial Intelligence, 2008)
    Text en actes de congrés
    Accés obert
    In this paper we propose a system where machine and human cooperate at every situation via a reactive emergent behavior, so that the person is always in charge of his/her own motion. Our approach relies on locally evaluating ...
  • An adaptive solution for Wireless LAN distributed power saving modes 

    Camps Mur, Daniel; Pérez-Costa, Xavier; Sallent Ribes, Sebastián (2009-12)
    Article
    Accés restringit per política de l'editorial
    The current trend to incorporate the Wireless LAN technology in increasingly smaller mobile devices poses new challenges, in terms of QoS and power consumption requirements, for the design of such devices. IEEE 802.11 ...
  • An adaptive spectral estimator based on the predictive innovation process and Kalman filtering 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Gasull Llampallas, Antoni; García Gómez, Ramón (1980)
    Text en actes de congrés
    Accés obert
  • An aeroelastic model for the design of bend-twist coupled wind turbine rotor blades 

    Shah Mohammadi, Mohammad Reza (Universitat Politècnica de Catalunya, 2014-09)
    Projecte Final de Màster Oficial
    Accés restringit per decisió de l'autor
    The present master thesis is devoted to the implementation of a bend-twist elastic coupling evaluation procedure which is robust and precise with relatively low computational time. The evaluation process used a 2D cross ...
  • An aerospace requirements setting to improve system design 

    Tomas Centrich, Xavier (Universitat Politècnica de Catalunya / Cranfield University, 2013)
    Treball Final de Grau
    Accés restringit per decisió de l'autor
    The design of modern aircraft engines relies heavily on technological advances. In response to pressures from customers and competitors for improvements in efficiency of performance, scheduling and overall cost reduction, ...
  • An agent-based model of the emergence and transmission of a language system for the expression of logical combinations 

    Sierra Santibáñez, Josefina (AAAI Press (Association for the Advancement of Artificial Intelligence), 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents an agent-based model of the emergence and transmission of a language system for the expression of logical combinations of propositions. The model assumes the agents have some cognitive capacities for ...
  • An agent-based model studying the acquisition of a language system of logical constructions 

    Sierra Santibáñez, Josefina (AAAI Press. Association for the Advancement of Artificial Intelligence, 2014)
    Text en actes de congrés
    Accés obert
    This paper presents an agent-based model that studies the emergence and evolution of a language system of logical constructions, i.e. a vocabulary and a set of grammatical constructions that allows the expression of logical ...
  • An agent-based simulation model of a market for dynamic spectrum access 

    López Berga, Ester; Murcia, César; Beltran, Fernando (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The dramatic increase in the demand for spectrum-based services and devices, combined with the long-term exclusive model of spectrum management, has led to an apparent spectrum scarcity. To overcome this scarcity, the ...
  • An agent-based simulation model of a market for dynamic spectrum allocation 

    López Berga, Ester (Universitat Politècnica de Catalunya, 2011-03-09)
    Projecte/Treball Final de Carrera
    Accés obert
    Català: El gran increment en la demanda de serveis i dispositius que utilitzen l'espectre radioelèctric, juntament amb el caràcter excessiu en termes tant temporals com espacials de les llicenciàs concedides pel seu ús, ...
  • An airborne GNSS-R field experiment over a vineyard for soil moisture estimation and monitoring 

    Alonso Arroyo, Alberto; Camps Carmona, Adriano José; Sanchez, Nilda; Pablos Hernández, Miriam; González Zamora, Ángel; Martinez Fernandez, Jose; Vall-Llossera Ferran, Mercedes Magdalena; Pascual, D. (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The Light Airborne Reflectometer for GNSS-R Observations (LARGO) is an airborne instrument designed for measuring the coherent reflectivity from different soils. In this work, an improved version of LARGO has been used in ...
  • An algebraic framework for Diffie–Hellman assumptions 

    Escala Ribas, Alex; Herold, Gottfried; Kiltz, Eike; Ràfols Salvador, Carla; Villar Santos, Jorge Luis (2015-10-22)
    Article
    Accés restringit per política de l'editorial
    We put forward a new algebraic framework to generalize and analyze Diffie-Hellman like Decisional Assumptions which allows us to argue about security and applications by considering only algebraic properties. Our D`,k-MDDH ...
  • An Algebraic framework for the definition of compositional semantics of normal logic programs 

    Lucio, Paqui; Orejas Valdés, Fernando; Pino Blanco, Elvira (1997-11)
    Report de recerca
    Accés obert
    The aim of our work is the definition of compositional semantics for modular units over the class of normal logic programs. In this sense, we propose a declarative semantics for normal logic programs in terms of model ...
  • An algebraic model for the storage of data in parallel memories 

    Fiol Mora, Miquel Àngel; Serra Albó, Oriol (Springer, 1989)
    Capítol de llibre
    Accés obert
    The use of SIMD computers requires efficient schemes of storage of data in order to have conflict-free acces in parallel computation. In this paper we restate the problem of finding such chemes in an algebraic context. ...