Browsing by Subject "Calibration"

Now showing items 1-20 of 192

    • 3D Face recognition with stereo automotive cameras 

      Tura Vecino, Biel (Universitat Politècnica de Catalunya, 2019-06)
      Bachelor thesis
      Open Access
      The automotive sector is experiencing a rapid change that will influence the way in which we will use cars. One of the main concerns of this new wave of automotive research regards the security of future vehicles, being ...

    • A calibration method for fully polarimetric microwave radiometers 

      Lahtinen, J..; Gasiewski, A.J.; Klein, M.; Corbella Sanahuja, Ignasi (IEEE Press. Institute of Electrical and Electronics Engineers, 2003-03)
      Article
      Open Access
      A technique for absolute end-to-end calibration of a fully polarimetric microwave radiometer is presented. The technique is based on the tripolarimetric calibration technique of Gasiewski and Kunkee, but is extended to ...

    • A comparison of the state of the art models for constitutive modelling of concrete 

      Caner, Ferhun Cem (2021-02-01)
      Article
      Open Access
      Concrete is undoubtedly the most important and widely used construction material of the last centuries. Nevertheless, mathematical models that can accurately capture the particular material behaviour under all loading ...

    • A full Stokes imaging polarimeter based on a consumer CMOS camera 

      Peña Gutiérrez, Sara; Ballesta Garcia, Maria; Royo Royo, Santiago (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      Nowadays, taking advantage of polarization allows enhancing the contrast of a detected object and extending the information of the scene compared to conventional intensity imagery, as the information added by polarimetric ...

    • A general analysis of error in noise measurement systems 

      Pradell i Cara, Lluís; Comerón Tejero, Adolfo; Ramírez González, Alejandro (Institute of Electrical and Electronics Engineers (IEEE), 1988)
      Conference report
      Open Access
      General and approximated expressions are presented which allow the identification and quantification of errors in noise figure measurements that use the Y-factor method. This formulation is a generalization of that in /2/ ...

    • A method for accurate zero calibration of asymmetric jaws in single-isocenter half-beam techniques 

      Hernandez Espinosa, Victor; Sempau Roma, Josep; Abella, R.; Romero Lopez, Matilde; Lopez Perez, Marcedes; Artigues, Manel; Arenas, M. (2013-02)
      Article
      Restricted access - publisher's policy
      Purpose: To present a practical method for calibrating the zero position of asymmetric jaws that provides higher accuracy at the central axis and improves dose homogeneity in the abutting region of half-beams. Methods: ...

    • A multistate single-connection calibration for microwave microfluidics 

      Orloff, Nathan D.; Ma, Xiao; Little, Charles A. E.; Mateu Mateu, Jordi (IEEE Microwave Theory and Techniques Society, 2018-02)
      Article
      Open Access
      With emerging medical, chemical, and biological applications of microwave-microfluidic devices, many researchers desire a fast and accurate calibration that can be achieved in a single connection. However, traditional ...

    • A new calibration technique for interferometric radiometers 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier (1998)
      Conference report
      Open Access
      This paper presents a new method for receiver calibration of interferometric radiometers. It is based on the distributed noise injection mechanism and it consists of fully calibrating the baseline error terms of the central ...

    • A Weierstrass extremal field theory for the fractional Laplacian 

      Cabré Vilagut, Xavier; Urtiaga Erneta, Iñigo; Felipe Navarro, Juan Carlos (De Gruyter, 2023-10-27)
      Article
      Open Access
      In this paper, we extend, for the first time, part of the Weierstrass extremal field theory in the Calculus of Variations to a nonlocal framework. Our model case is the energy functional for the fractional Laplacian (the ...

    • Algorithms and tools for the automatic scanning of mid-complexity 3D objects 

      Carruesco Llorens, Àlex (Universitat Politècnica de Catalunya, 2016-07-04)
      Master thesis
      Open Access
      We designed and implemented an automatic 3D scanning system for acquiring 3D models from mid-complexity objects. The system includes the acquisition of the data, the processing steps, and the mesh reconstruction. We also ...

    • An architecture providing depolarization ratio capability for a multi-wavelength Raman lidar: implementation and first measurements 

      Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Granados Muñoz, María José; Ben Chahed, Enis; Muñoz Porcar, Constantino; Barragán Cuesta, Rubén; Comerón Tejero, Adolfo; Rocadenbosch Burillo, Francisco; Vidal, Eric (MDPI AG, 2017-12-20)
      Article
      Open Access
      A new architecture for the measurement of depolarization produced by atmospheric aerosols with a Raman lidar is presented. The system uses two different telescopes: one for depolarization measurements and another for ...

    • Analisys of noise injection networks for interferometric radiometer calibration 

      Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE Microwave Theory and Techniques Society, 2000-04)
      Article
      Open Access
      Abstract: The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture ...

    • Analisys of noise-injection networks for interferometric-radiometer calibration 

      Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
      Article
      Open Access
      The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ...

    • Analysis of Correlation and Total Power Radiometer Front-Ends Using Noise Waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
      Open Access
      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...

    • Analysis of correlation and total power radiometer front-ends using noise waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
      Open Access
      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...

    • Aportaciones para la caracterización de geófonos en un laboratorio de vibración (OBS, vibraciones, sísmica, acoplamiento, incertidumbre) 

      Rodríguez Camarero, David (Universitat Politècnica de Catalunya, 2005-01)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Los objetivos principales de este proyecto han sido: La conformación de un laboratorio de vibración completamente equipado y plenamente operativo para la medición y calibración de geófonos y acelerómetros. Estudio y ...

    • Automatic calibration of channels frequency response in interferometric radiometers 

      Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Monzón Soria, Francisco Jose (IEE-INST ELEC ENG, 1999-01-31)
      Article
      Open Access
      The large field of view required in Earth observation interferometric radiometers does not enable the use of a variable delay to compensate for different transit times, as in radioastronomy. A technique is presented to ...

    • Automotive radar and radome calibration to improve the direction of arrival detection performance 

      Buitrago Ventura, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      An assessment of the improvement in the Direction of Arrival (DoA) measurements in automotive radar sensor by joint calibration of the radar sensor plus the radome is presented. Nowadays, radar sensors are calibrated before ...

    • Benchmarking selection of parameter values for the Barcelona basic model 

      D'Onza, Francesca; Wheeler, S. J.; Gallipoli, Domenico; Hofmann, M.; Lloret Cabot, Marti; Lloret Morancho, Antonio; Mancuso, C.; Pereira, J.M.; Romero Morales, Enrique Edgar; Toll, D. G.; Vassallo, R. (2015-09)
      Article
      Open Access
      Seven teams took part in a benchmarldng exercise on selection of parameter values for the Barcelona Basic Model (BBM) from experimental data on an unsaturated soil. All teams were provided with experimental results from 9 ...

    • Calibración de herramientas heurística para la optimización del proceso de tesado de puentes atirantados 

      Gisbert Doménech, Carlos Miguel; Lozano Galant, José Antonio; Payá Zaforteza, Ignacio Javier; Turmo Coderque, José (2022)
      Conference report
      Open Access
      El diseño y la materialización del proceso constructivo es uno de los aspectos más complicados en proyecto de los puentes atirantados. En la mayoría de las estructuras este proceso se define en base únicamente a la experiencia ...