Ara es mostren els items 1-20 de 37

  • 15. Sessió 4. De la teoria dels fractals i l'arquitectura d'Enric Miralles / Claudi Alsina 

    Alsina Català, Claudi (2009-07-07)
    Audiovisual
    Accés obert
  • A microstrip array operating in a fracton mode [fractal geometry] 

    Anguera Pros, Jaume; Montesinos, Gemma; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2003)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    A high-directivity microstrip array using multilevel elements based on a fractal geometry is theoretically compared with one using a circular patches. Within the same electrical area, the same directivity can be obtained. ...
  • A study of the scaling properties of rainfall in spain and its appropriateness to generate intensity-duration-frequency curves from daily records 

    Rodríguez Solá, Raúl; Casas Castillo, M. del Carmen; Navarro Bosque, Javier; Redaño Xipell, Angel (John Wiley & Sons, 2016-04-20)
    Article
    Accés restringit per política de l'editorial
    A methodology based on the fractal properties of rainfall has been applied to obtain the intensity-duration-frequency, IDF, curves for 100 pluviometric Spanish stations over the Iberian Peninsula and the Balearic Islands ...
  • An iterative model for fractal antennas: application to the Sierpinski gasket antenna 

    Puente Baliarda, Carles; Borja Borau, M.Carmen; Navarro Rodero, Mònica; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
    Article
    Accés obert
    A simple model that explains the behavior of the Sierpinski fractal antenna is presented. This model shows that the multiband behavior of the Sierpinski fractal antenna is a consequence of its fractal nature. The model is ...
  • Análisis de geometrías fractales para resonadores microstrip 

    Extremera Extremera, Manuel Jesus (Universitat Politècnica de Catalunya, 2016-02-25)
    Projecte/Treball Final de Carrera
    Accés obert
    Usage and popularity growth of communications satellites has increased the interest on filter synthesis research. Nowadays, the improvement of the trade-off between size, weight, cost and performance is the golden rule. ...
  • Análisis multifractal de procesos autosimilares : imágenes de satélite e inestabilidades baroclinas 

    Redondo Apraiz, José Manuel; Busquets Grau, Juan; Platónov, Alexéi Konstantínovich; Garzón Bedoya, Germán (2008-05-05)
    Article
    Accés obert
  • Atmospheric-turbulence-induced power-fade statistics for a multiaperture optical receiver 

    Belmonte Molina, Aniceto; Comerón Tejero, Adolfo; Rubio, Juan Antonio; Fernández (OPTICAL SOC AMER, 1997-01-31)
    Article
    Accés obert
    To estimate the probability distributions of power fades, we consider two basic types of disturbance in electromagnetic wave propagation through atmospheric turbulence: wave-front intensity fluctuations and wave-front ...
  • Automatic Computation of Potential Tumor Regions in Cancer Detection using Fractal analysis techniques 

    Orellana Bech, Bernat (Universitat Politècnica de Catalunya, 2009-09-08)
    Projecte Final de Màster Oficial
    Accés obert
    Radiology is one of the most active and technologically advanced fields in medicine. It was born from the most advanced physics concepts, and it became a reality thanks to the state-of-the art of electronics and computer ...
  • Breakage of an artificial crushable material under loading 

    Casini, Francesca; Viggiani, Giulia M.B.; Springman, Sarah Marcella (2013-10)
    Article
    Accés restringit per política de l'editorial
    The mechanical behaviour of granular materials depends on their grading. Crushing of particles under compression or shear modifies the grain size distribution, with a tendency for the percentage of fine material to increase. ...
  • Comments on "On the relationship between fractal dimension and the performance of multi-resonant dipole antennas using Koch curves" 

    González Arbesú, José María; Rius Casals, Juan Manuel; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-06-30)
    Working paper
    Accés obert
    Comentaris referits a l'article següent: K. J. Vinoy, J. K. Abraham, and V. K. Varadan, “On the relationship between fractal dimension and the performance of multi-resonant dipole antennas using Koch curves,” IEEE ...
  • Edge effect causes apparent fractal correlation dimension of uniform spatial raindrop distribution 

    Uijlenhoet, Remko; Porra, J. M.; Sempere Torres, Daniel; Creutin, Jean-Dominique (University of Thechnology and Agriculture Nicholas Copernicus University, 2009-04)
    Article
    Accés obert
    Lovejoy and Schertzer (1990a) presented a statistical analysis of blotting paper observations of the (twodimensional) spatial distribution of raindrop stains. They found empirical evidence for the fractal scaling behavior ...
  • Estudio de la previsión de las series de tráfico por medio de la transformada Wavelet 

    Gelabert Serra, Juan (Universitat Politècnica de Catalunya, 2016-10)
    Projecte/Treball Final de Carrera
    Accés obert
    Nowadays, the amount of information that communications networks support due to its rise, makes necessary the distribution of different information flows, to avoid saturation and information lose. This project aims to ...
  • Filtered deterministic waves and analysis of the fractal dimension of the components of the wind velocity 

    Tijera, Manuel; Cano Marchante, Jose Leandro; Cano, Darío; Bolster, Diogo; Redondo Apraiz, José Manuel (2009-03-29)
    Article
    Accés restringit per política de l'editorial
    The difficulty in developing models for waves in turbulent flows is a key problem in the analysis of the complexity of turbulence. We present a method to find and filter perturbations that are generated by the flow of ...
  • Fractal design of multiband and low side-lobe arrays 

    Puente Baliarda, Carles; Pous Andrés, Rafael (1996-05)
    Article
    Accés obert
    Most array factor design techniques are highly dependent on the operating wavelength. In this paper, a novel technique based on fractal structures is described for multiband operation. The analysis is focused in two different ...
  • Geometría fractal.Una nueva herramienta para el desarrollo del diseño textil. Aplicaciones en la estampación. 

    Neves, Jorge; Neves, Manuela; Janssens, Katja (Instituto de Investigación Textil y Cooperación Industrial, 1994-01)
    Article
    Accés obert
    En este articulo se presenta el proceso completo de diseno, comenzando por un diseño creado con la percepción matemática de la Geometría Fractal y continuando con la introducción de estas imágenes en los sistemas CAD y su ...
  • Hilbert fractal curves for HTS miniaturized filters 

    Barra Bizinotto, Marilda; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2004)
    Text en actes de congrés
    Accés obert
    This work presents novel compact High Temperature Superconductor (HTS) microstrip resonators based on Hilbert fractal curves. Their miniaturization performance has been investigated, emphasizing the parameters which allow ...
  • How much can be reduced the internal FM antenna of mobiles phones? 

    Borja, C.; Anguera Pros, Jaume; Puente Baliarda, Carles; Vergés, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Text en actes de congrés
    Accés obert
    The paper introduces both a new internal FM antenna for mobile phones based on the fractal Hilbert curve, and a new evaluation criterion for quantifying the quality of the signal received by the FM antenna of mobile phones. ...
  • Introducción a los fractales 

    Alonso Tamayo, Juan Carlos (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1995)
    Article
    Accés obert
  • La geometría fractal en el diseño textil: desarrollo de un programa computacional. 

    Palominos, Pedro Iván; González, Nayarett (Instituto de Investigación Textil y Cooperación Industrial, 1994-07)
    Article
    Accés obert
    El presente trabajo apunta a la activación del proceso de creación de nuevos diseños textiles, basados en la geometría de fractales. Desarrollando para ello un programa computacional que facilite la creación de nuevos ...
  • Linear and nonlinear analyses of EEG dynamics during non-painful somatosensory processing in chronic pain patients 

    Sitges, Carolina; Bornas, Xavier; Llabrés, Jordi; Noguera Batlle, Miquel; Montoya, Pedro (2010-08)
    Article
    Accés restringit per política de l'editorial
    The aim of our study was to characterize brain dynamics of affective modulation of somatosensory processing in chronic pain. We hypothesized that chronic pain patients will show abnormal EEG activity under negative mood ...