Exploració per tema "Fractals"

Ara es mostren els items 18-37 de 72

    • Damage diagnosis for offshore wind turbine foundations based on the fractal dimension 

      Hoxha, Ervin; Vidal Seguí, Yolanda; Pozo Montero, Francesc (2020-10-05)
      Article
      Accés obert
      Cost-competitiveness of offshore wind depends heavily in its capacity to switch preventive maintenance to condition-based maintenance. That is, to monitor the actual condition of the wind turbine (WT) to decide when and ...

    • Dimensional Synthesis of Wristed Binary Hands 

      Hassanzadeh, Neda; Pérez Gracia, Alba (2016-04)
      Article
      Accés obert
      The kinematic synthesis applied to tree topologies is a tool for the design of multi-fingered robotic hands, for a simultaneous task of all fingertips. Even though traditionally wrists and hands have been designed separately, ...

    • Diseño de una agrupación de antenas parche para un sistema radiante en la banda de 2.45 GHz 

      Fernandez Tarifa, Ismael Joshua (Universitat Politècnica de Catalunya, 2021-09-10)
      Treball Final de Grau
      Accés restringit per decisió de l'autor

    • Dual-band Sierpinski fractal monopole antenna 

      Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      A new top-loaded reduced-sized dual-band (1.9 GHz and 3.5 GHz) monopole antenna for wireless communications is presented. The antenna provides better than -15 dB input return loss and keeps the same radiation pattern over ...

    • 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 analysis and statistics of seismic generation rates: the example of the southern California 

      Lana Pons, Francisco Javier; Martínez Santafé, Maria Dolors; Amir Hosseini, Seyed; Serra de Larrocha, Carina (2017-06)
      Article
      Accés obert
      The seismic generation rate, SGR, at southern California along the 1981–2007 recording period is analysed with the main purpose of finding out whether there exist some correlations between seismic activity before, after ...

    • Fractal analysis of growing cities and its relationship with health centre 

      Leyton, Carolina; Redondo Apraiz, José Manuel; Tarquis Alfonso, Ana Maria; Gil Martín, Joan Carles; Tellez Alvarez, Jackson David (Moscow Institute of Physics and Technology (MIPT), 2017-06-06)
      Article
      Accés obert
      During recent years, many research group interested in the study of organizational networks from different fields, e.g. studies of behavior of cities growth following the fractal theory. Considering the fractal analysis ...

    • Fractal antennas 

      Puente Baliarda, Carles (Universitat Politècnica de Catalunya, 1997-06-30)
      Tesi
      Accés obert
      Las antenas son dispositivos esencialmente de banda estrecha; es decir, su comportamiento es altamente dependiente de la frecuencia de operación. La relación entre la longitud de onda de trabajo y el tamaño de la antena ...

    • Fractal behaviour of distances between consecutive aftershocks: the examples of Landers, Northridge and Hector Mine Southern California mainshocks 

      Lana Pons, Francisco Javier; Martínez Santafé, Maria Dolors; Serra de Larrocha, Carina (2020-08-13)
      Article
      Accés obert
      Distances between consecutive aftershocks are analysed by means of mono- and multifractal theory with the aim of quantifying the complexity of the physical mechanism governing them, as well as their predictability and ...

    • 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 ...

    • Fractal multiband antenna based on the sierpinski gasket 

      Puente Baliarda, Carles; Romeu Robert, Jordi; Pous Andrés, Rafael; García, X; Benítez, F (Institution of Electrical Engineers, 1996-01)
      Article
      Accés obert
      Experimental and computed results show a multiband behaviour over five bands for the new fractal Sierpinski antenna. Such a behaviour is based on the self-similarity properties of the antenna's fractal shape, which might ...

    • Fractal properties of cluster of colloidal magnetic particles 

      Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (1998-05)
      Article
      Accés restringit per política de l'editorial
      We have studied the properties of clusters of colloidal magnetic particles generated from a 2D aggregation model with dipolar interparticle interactions. Particles diffuse off-lattice, experiencing dipolar 1 with the already ...

    • Fractal reconstruction of sub-grid scales for large eddy simulation 

      Akinlabi, Emmanuel; Waclawczyk, Marta; Malinowski, Szymon; Mellado González, Juan Pedro (springer-Verlag, 2019-05-28)
      Article
      Accés obert
      In this work, the reconstruction of sub-grid scales in large eddy simulation (LES) of turbulent flows in stratocumulus clouds is addressed. The approach is based on the fractality assumption of turbulent velocity field. ...

    • Generació procedural de terrenys potencialment infinits utilitzant CUDA 

      Solé, Genís (Universitat Politècnica de Catalunya, 2017-10-23)
      Treball Final de Grau
      Accés obert
      En aquest projecte es presenta la implementació de una llibreria de caràcter general que proporciona els mecanismes bàsics tant per a la visualització com la generació sota demanda de terrenys generats amb funcions de ...

    • 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 ...

    • High directivity modes in the koch island fractal patch antenna 

      Romeu Robert, Jordi; Borja Borau, Carmen; Blanch Boris, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The article shows that a patch antenna with fractal boundary exhibits, at a frequencies above the fundamental mode, localized modes. These modes can have broadside directive patterns. As an example of this phenomenon ...

    • 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. ...