Ara es mostren els items 1-15 de 15

    • A connection between Inverse Problems and Nonstandard Analysis 

      Martínez Moraian, Alejandra (Universitat Politècnica de Catalunya, 2018-10)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Nonstandard analysis was born in the decade of 1960 an attempt to give a formal context to the Leibniz approach to differential calculus, in particular in order to provide a rigorous foundation to the notions of infinitesimal ...
    • An enhanced resolution brightness temperature product for future conical scanning microwave radiometers 

      Nunziata, Ferdinando; Alparone, Matteo; Camps Carmona, Adriano José; Hyuk, Park; Zurita Campos, Alberto M.; Estatico, Claudio; Migliaccio, Maurizio (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Article
      Accés obert
      An enhanced spatial resolution brightness temperature product is proposed for future conical scan microwave radiometers. The technique is developed for Copernicus Imaging Microwave Radiometer (CIMR) measurements that are ...
    • Automatic calibration of groundwater models with bias correction and data filtering: working with drawdown data 

      Trabucchi, Michela; Fernández García, Daniel; Carrera Ramírez, Jesús (2021-03)
      Article
      Accés obert
      The drawdown response to a hydraulic stress contains crucial information to characterize an aquifer. Modeling drawdowns is far easier than modeling heads because they are subject to homogeneous (zero) internal sink/sources, ...
    • Current distributions in wide YBCO tapes 

      Carrera, Miquel; Granados García, Xavier; Amorós Torrent, Jaume; Puig Molina, Teresa; Obradors Berenguer, Xavier (Elsevier, 2012)
      Article
      Accés obert
      The need of a better mechanical behaviour and the stabilization of coated conductors for applications, as Magnets, cables or Fault Current Limiters, has motivated the lamination of tapes with stainless steel or copper ...
    • Estimation of synaptic activity during neuronal oscillations 

      Guillamon Grabolosa, Antoni; Vich Llompart, Catalina; Prohens Sastre, Rafel; Teruel Aguilar, Antonio E. (Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-24)
      Article
      Accés obert
      In the study of brain connectivity, an accessible and convenient way to unveil local functional structures is to infer the time trace of synaptic conductances received by a neuron by using exclusively information about its ...
    • Modelado numérico del proceso de soldadura FSW incorporando una técnica de estimación de parámetros 

      Pereyra, S.; Lombera, G.A.; Urquiza, S.A. (Universitat Politècnica de Catalunya. CIMNE, 2014)
      Article
      Accés obert
      Los modelos numéricos de transferencia de calor y de flujo de fluido empleados en la simulación del proceso de soldadura por fricción-agitación (FSW) han contribuido a la comprensión del proceso. Sin embargo, existen ciertos ...
    • Numerical modelling and experimental validation of dynamic fracture events along weak planes 

      Arias Vicente, Irene; Knap, Jaroslaw; Chalivendra, V. B.; Hong, Soonsung; Ortiz, Michael; Rosakis, Ares (2007-08)
      Article
      Accés obert
      The conceptual simplicity and the ability of cohesive finite element models to describe complex fracture phenomena makes them often the approach of choice to study dynamic fracture. These models have proven to reproduce ...
    • On the trade-off between enhancement of the spatial resolution and noise amplification in conical-scanning microwave radiometers 

      Alparone, Matteo; Nunziata, Ferdinando; Estatico, Claudio; Camps Carmona, Adriano José; Hyuk, Park; Migliaccio, Maurizio (2022-01-01)
      Article
      Accés obert
      The ability to enhance the spatial resolution of measurements collected by a conical-scanning microwave radiometer (MWR) is discussed in terms of noise amplification and improvement of the spatial resolution. Simulated ...
    • Overdetermined partial boundary value problems on finite networks 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2015-03-01)
      Article
      Accés obert
      In this study, we define a class of non-self-adjoint boundary value problems on finite networks associated with Schrodinger operators. The novel feature of this study is that no data are prescribed on part of the boundary, ...
    • Overdetermined partial resolvent kernels for finite networks 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos (2016-03-01)
      Article
      Accés obert
      In [2], a study of the existence and uniqueness of solution of partial overdetermined boundary value problems for finite networks was performed. These problems involve Schrodinger operators and the novel feature is that ...
    • Physics-based manifold learning in scaffolds for tissue engineering: application to inverse problems 

      Muixí Ballonga, Alba; Zlotnik, Sergio; García González, Alberto; Díez, Pedro (2022-10-03)
      Article
      Accés obert
      In the field of bone regeneration, insertion of scaffolds favours bone formation by triggering the differentiation of mesenchymal cells into osteoblasts. The presence of Calcium ions (Ca2+) in the interstitial fluid across ...
    • Reconstruction of the join time-delay Doppler-scale reflectivity density in the wide-band regime. A frame theory based approach 

      Rebollo Neira, Laura; Plastino, Angel Luís; Fernández Rubio, Juan Antonio (American Institute of Physics, 2000-08-31)
      Article
      Accés restringit per política de l'editorial
      The inverse scattering problem concerning the determination of the joint time-delay Doppler-scale reflectivity density characterizing continuous target environments is addressed by recourse to the generalized frame theory. ...
    • Recovering the conductances on grids: A theoretical justification 

      Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Mitjana Riera, Margarida (2016)
      Article
      Accés obert
      In this work, we present an overview of the work developed by the authors in the context of inverse problems on nite networks. This study performs an extension of the pioneer studies by E.B. Curtis and J.A. Morrow, ...
    • Simultaneous detection of the nonlinear restoring and excitation of a forced nonlinear oscillation: an integral approach 

      Ahmad, Fayyaz; Jang, Taek Soo; Park, Jinsoo; Sung, Hong Gun (2016-06-01)
      Article
      Accés obert
      We address in this article, how to calculate the restoring characteristic and the excitation of a nonlinear forced oscillating system. Under the assumption that the forced nonlinear oscillator has a periodic solution with ...
    • The continuous wavelet transform as a maximum entropy solution of the corresponding inverse problem 

      Rebollo Neira, Laura; Fernández Rubio, Juan Antonio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-07-31)
      Article
      Accés obert
      The continuous wavelet transform is obtained as a maximum entropy solution of the corresponding inverse problem. It is well known that although a signal can be reconstructed from its wavelet transform, the expansion is ...