Ara es mostren els items 1-20 de 27

  • Atmospheric boundary-layer height estimation using a Kalman filter and a frequency-modulated continuous-wave radar 

    Lange, Diego; Rocadenbosch Burillo, Francisco; Tiana Alsina, Jordi; Frasier, Steve (Institute of Electrical and Electronics Engineers (IEEE), 2015-06-01)
    Article
    Accés obert
    An adaptive solution based on an Extended Kalman Filter (EKF) is proposed to estimate the Atmospheric Boundary-Layer Height (ABLH) from Frequency-Modulated Continuous-Wave (FMCW) S-band weather-radar returns. The EKF ...
  • Atmospheric boundary layer height estimation using combined microwave radiometer and lidar data 

    Saeed, Umar; Tiana Alsina, Jordi; Crewell, Susanne; Rocadenbosch Burillo, Francisco (2014)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The estimation of atmospheric boundary layer height (ABLH) during a full diurnal cycle using ground-based remote sensing instruments is one of the key challenges in atmospheric science. Most of these instruments such as ...
  • Atmospheric boundary layer height monitoring using a kalman filter and backscatter lidar returns 

    Lange, Diego; Tiana Alsina, Jordi; Saeed, Umar; Tomás Martinez, Sergio; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-01)
    Article
    Accés restringit per política de l'editorial
    A solution based on a Kalman filter to trace the evolution of the atmospheric boundary layer (ABL) sensed by a ground-based elastic-backscatter tropospheric lidar is presented. An erf-like profile is used to model the ...
  • A wind-lidar buoy for offshore wind measurements: first commissioning test-phase results 

    Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; Sospedra, Joaquim; Aghabi, Rajai; González Marco, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This paper presents the development of a new commercial floating lidar system aimed to measure the wind resource and other environmental variables at candidate wind farm locations. This work describes this new lidar system ...
  • Concept design of a multiwavelength aerosol lidar system with mitigated diattenuation effects and depolarization-measurement capability 

    Comerón Tejero, Adolfo; Sicard, Michaël; Vidal Calvo, Eric; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; García Vizcaíno, David (2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    It is known that the retrieval of aerosol extinction and backscatter coefficients from lidar data acquired through so-called total-power channels – intended to measure the backscattered power irrespective of the polarization ...
  • Distinguishing signatures of determinism and stochasticity in spiking complex systems 

    Aragoneses Aguado, Andrés; Rubido, Nicolás; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2013-05-07)
    Article
    Accés obert
  • Estimation of the motion-induced horizontal-wind-speed standard deviation in an offshore doppler lidar 

    Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Salcedo, A.; Rocadenbosch Burillo, Francisco (Multidisciplinary Digital Publishing Institute (MDPI), 2018-12-14)
    Article
    Accés obert
    This work presents a new methodology to estimate the motion-induced standard deviation and related turbulence intensity on the retrieved horizontal wind speed by means of the velocity-azimuth-display algorithm applied to ...
  • Experimental characterization of the transition to coherence collapse in a semiconductor laser with optical feedback 

    Panozzo, M.; Quintero Quiroz, Carlos Alberto; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (Institute of Physics (IOP), 2017-11-01)
    Article
    Accés obert
    Semiconductor lasers with time-delayed optical feedback display a wide range of dynamical regimes, which have found various practical applications. They also provide excellent testbeds for data analysis tools for characterizing ...
  • Experimental study of different LFF regimes in semiconductor lasers with an external cavity 

    Aragoneses Aguado, Andrés; Zamora Munt, Jordi; Tiana Alsina, Jordi; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2011)
    Comunicació de congrés
    Accés restringit per política de l'editorial
  • Experimental study of modulation waveforms for entraining the spikes emitted by a semiconductor laser with optical feedback 

    Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Panozzo, M.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2018-04-02)
    Article
    Accés obert
    The entrainment phenomenon, by which an oscillator adjusts its natural rhythm to an external periodic signal, has been observed in many natural systems. Recently, attention has focused on which are the optimal conditions ...
  • Extrinsic behaviour of PZT ceramics near the morphotropic phase transition 

    Albareda Tiana, Alfonso; Pérez Pérez, Rafael; García García, José Eduardo; Tiana Alsina, Jordi; Pérez Codina, Estel (2005-09)
    Article
    Accés obert
    The aim of this work is to study the dependence of the linear and non-linear dielectric, piezoelectric and mechanical coefficients on the Ti fraction in PZT ceramic compositions near the morphotropic phase boundary. The ...
  • Extrinsic coefficient characterisation of PZT ceramics near the morphotropic phase boundary 

    Albareda Tiana, Alfonso; Pérez Pérez, Rafael; García García, José Eduardo; Tiana Alsina, Jordi; Pérez Codina, Estel; Gorri Ochoa, José Antonio (2006-05)
    Article
    Accés obert
    El comportamiento extrínseco de las cerámicas PZT, relacionado con el movimiento de las paredes de los dominios, comporta efectos no lineales grandes. Esta correspondencia entre efectos extrínsecos y no linealidades puede ...
  • Lag alternance in unidirectional coupled semiconductor lasers 

    Tiana Alsina, Jordi; García López, J.H.; Torrent Serra, Maria del Carmen; García Ojalvo, Jordi (2009)
    Text en actes de congrés
    Accés obert
  • Motion compensation study for a floating Doppler wind lidar 

    Tiana Alsina, Jordi; Gutiérrez Antuñano, Miguel Ángel; Würth, Inés; Puigdefàbregas Sagristà, Joan; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper addresses a cardanic frame as mechanical-compensation device for a Doppler-wind lidar installed on a floating sea buoy as the “moving” lidar. From the methodological point of view, the horizontal wind speed (HWS) ...
  • Multi-wavelength aerosol LIDAR signal pre-processing: practical considerations 

    Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Sicard, Michaël; Lange Vega, Diego; Barragán Cuesta, Rubén; Batet Torrell, Óscar; Comerón Tejero, Adolfo; López Márquez, Miguel Ángel; Muñoz Porcar, Constantino; Tiana Alsina, Jordi; Tomás Martínez, Sergio (Institute of Physics (IOP), 2015)
    Text en actes de congrés
    Accés obert
    Elastic lidars provide range-resolved information about the aerosol content in the atmosphere. Nevertheless, a number of pre-processing techniques need to be used before performing the inversion of the detected signal: ...
  • Multi-wavelength aerosol LIDAR signal pre-processing: practical considerations 

    Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Sicard, Michaël; Lange, Diego; Barragán Cuesta, Rubén; Batet Torrell, Óscar; Comerón Tejero, Adolfo; López Márquez, Miguel Ángel; Muñoz Porcar, Constantino; Tiana Alsina, Jordi; Tomás Martínez, Sergio (2015-12)
    Article
    Accés obert
    Elastic lidars provide range-resolved information about the aerosol content in the atmosphere. Nevertheless, a number of pre-processing techniques need to be used before performing the inversion of the detected signal: ...
  • No linealidad del efecto piezoeléctrico directo d33 en cerámicas PZT 

    Pérez Pérez, Rafael; Albareda Tiana, Alfonso; Pérez Codina, Estel; García García, José Eduardo; Tiana Alsina, Jordi; Gorri Ochoa, José Antonio (2006-05)
    Article
    Accés obert
    Se ha implementado una nueva técnica de medida aplicando un esfuerzo uniaxial sobre la muestra y midiendo la carga generada. Se aplica un esfuerzo suficientemente intenso para producir efectos no lineales, y se analiza ...
  • Parameter design of a biaxial lidar ceilometer 

    Gregorio López, Eduard; Rocadenbosch Burillo, Francisco; Tiana Alsina, Jordi; Comerón Tejero, Adolfo; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon (2012-07-11)
    Article
    Accés restringit per política de l'editorial
    This paper presents parameter design methodology and related optomechanical engineering of a 905-nm diode-laser biaxial, eye-safe lidar ceilometer prototype for cloud-height monitoring. Starting with a brief review of the ...
  • Performance evaluation of a floating Doppler wind lidar buoy in mediterranean near-shore conditions 

    Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Bischoff, Oliver; Cateura, Jordi; Rocadenbosch Burillo, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    This paper departs from a preliminary near-shore measurement test campaign hold at El Pont del Petroli (PdP), Barcelona (Spain) where measurements from a Doppler wind-lidar buoy (the ”floating” lidar) are cross-examined ...
  • Performance evaluation of a floating lidar buoy in nearshore conditions 

    Gutiérrez Antuñano, Miguel Ángel; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco (2017-05-29)
    Article
    Accés obert
    This work provides a signal-processing and statistical-error analysis methodology to assess key performance indicators for a floating Doppler wind lidar. The study introduces the raw-to-clean data processing chain, error ...