Ara es mostren els items 509-528 de 753

    • Natural convection in a laterally heated cylindrical enclosure 

      Sánchez Casals, Odalys (Universitat Politècnica de Catalunya, 2011-02-04)
      Projecte Final de Màster Oficial
      Accés obert
      A numerical study on the natural convection of small Prandtl number fluid in a cylindrical enclosure with lateral heating has been performed by a combination of second order time-splitting and pseudo –spectral methods. The ...
    • New block ILU preconditioner scheme for numerical analysis of very large electromagnetic problems 

      Heldring, Alexander; Rius Casals, Juan Manuel; Ligthart, Leo P. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-03-31)
      Article
      Accés obert
      Large electromagnetic scattering and radiation problems are tackled by iterative solvers, which require the use of huge preconditioners. Most often, the incomplete LU decomposition (ILU) of the preconditioner is applied ...
    • New electric-magnetic field integral equation for the scattering analysis of perfectly conducting sharp-edged objects at very low or extremely low frequencies 

      Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • New results on stabbing segments with a polygon 

      Díaz Bañez, José Miguel; Korman Cozzetti, Matías; Pérez Lantero, Pablo; Pilz, Alexander; Seara Ojea, Carlos; Silveira, Rodrigo Ignacio (2015-01-01)
      Article
      Accés obert
      We consider a natural variation of the concept of stabbing a set of segments with a simple polygon: a segment s is stabbed by a simple polygon P if at least one endpoint of s is contained in P, and a segment set S is stabbed ...
    • New subgrid-scale models for large-eddy simulation of Rayleigh-Bénard convection 

      Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
      Text en actes de congrés
      Accés obert
      At the crossroad between flow topology analysis and the theory of turbulence, a new eddy-viscosity model for Large-eddy simulation has been recently proposed by Trias et al.[PoF, 27, 065103 (2015)]. The S3PQR-model has the ...
    • Non linear statistical models to improve wind power forecasts 

      Muñoz Gracia, María del Pilar; Sánchez Espigares, Josep Anton; Márquez, M. Dolores (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • Non-crossing paths with geographic constraints 

      Silveira, Rodrigo Ignacio; Speckmann, Bettina; Verbeek, Kevin (Chapman & Hall/CRC, 2019-01-01)
      Article
      Accés obert
      A geographic network is a graph whose vertices are restricted to lie in a prescribed region in the plane. In this paper we begin to study the following fundamental problem for geographic networks: can a given geographic ...
    • Non-Hermitian coupled semiconductor laser array 

      Herrero Simon, Ramon; Medina Pardell, Judith; Botey Cumella, Muriel; Staliunas, Kestutis (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2022)
      Text en actes de congrés
      Accés obert
      We propose and explore a stabilization mechanism of a semiconductor laser array based on asymmetric coupling between neighboring lasers. The stabilization scheme takes advantage of the symmetry breaking of non-Hermitian ...
    • Non-regularised inverse finite element analysis for 3D traction force microscopy 

      Muñoz Romero, José (2016-06-10)
      Article
      Accés obert
      The tractions that cells exert on a gel substrate from the observed displacements is an increasingly attractive and valuable information in biomedical experiments. The computation of these tractions requires in general ...
    • Nonintrusive parametric solutions in structural dynamics 

      Cavaliere, Fabiola; Zlotnik, Sergio; Larráyoz Izcara, Xabier; Díez, Pedro (2022-02-01)
      Article
      Accés obert
      A nonintrusive reduced order method able to solve a parametric modal analysis is proposed in this work. The main objective is being able to efficiently identify how a variation of user-defined parameters affects the dynamic ...
    • Nonintrusive reduced order model for parametric solutions of inertia relief problems 

      Cavaliere, Fabiola; Zlotnik, Sergio; Sevilla Cárdenas, Rubén; Larráyoz Izcara, Xabier; Díez, Pedro (John Wiley & sons, 2021-08-30)
      Article
      Accés obert
      The Inertia Relief (IR) technique is widely used by industry and produces equilibrated loads allowing to analyze unconstrained systems without resorting to the more expensive full dynamic analysis. The main goal of this ...
    • Nonintrusive stochastic finite elements for crashworthiness with VPS/Pamcrash 

      Rocas, Marc; García González, Alberto; Larráyoz Izcara, Xabier; Díez, Pedro (2020-01-13)
      Article
      Accés obert
      Crashworthiness analysis remains an important concern for the design of safety structures. In this context, uncertainties play an essential role in the response of a crash problem with non linear behavior. With this statement ...
    • Nonsingular isogeometric boundary element method for stokes flows in 3D 

      Heltai, Luca; Arroyo Balaguer, Marino; DeSimone, Antonio (2014-01)
      Article
      Accés obert
      Isogeometric analysis (IGA) is emerging as a technology bridging computer aided geometric design (CAGD), most commonly based on Non-Uniform Rational B-Splines (NURBS) surfaces, and engineering analysis. In finite element ...
    • Note on the efficiency of some iterative methods for solving nonlinear equations 

      Grau Sánchez, Miguel; Noguera Batlle, Miquel; Díaz Barrero, José Luis (2015-11-02)
      Article
      Accés obert
      The e ciency of algorithms for solving nonlinear equations is a measure of comparison between di erent iterative methods. In the case of scalar equations two parameters are considered as it is well-known, but frequently ...
    • Novel EMI assessment method based on statistical detectors to protect sensitive digital radio receivers 

      Pous Solà, Marc; Azpúrua Auyanet, Marco Aurelio; Zhao, Dongsheng; Wolf, Johannes; Silva Martínez, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés obert
      This paper presents a methodology to assess the degradation performance caused by EMI to digital radio receivers. The procedure developed employs statistical information of the interference and the communication signal to ...
    • Novel monopolar MFIE MoM-discretization for the scattering analysis of small objects 

      Úbeda Farré, Eduard; Rius Casals, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
      Article
      Accés obert
      We present a novel method of moments (MoM)-magnetic field integral equation (MFIE) discretization that performs closely to the MoM-EFIE in the electromagnetic analysis of moderately small objects. This new MoM-MFIE ...
    • Novel variable radius spiral-shaped micromixer: from numerical analysis to experimental validation 

      Mehrdel, Pouya; Karimi, Shadi; Farré Lladós, Josep; Casals Terré, Jasmina (2018-10-27)
      Article
      Accés obert
      A novel type of spiral micromixer with expansion and contraction parts is presented in order to enhance the mixing quality in the low Reynolds number regimes for point-of-care tests (POCT). Three classes of micromixers ...
    • Una nueva estrategia para el estudio de la vulnerabilidad de edificios expuestos a explosiones a cielo abierto 

      Zárate Araiza, José Francisco; Cardoso, V.E.; Barbat Barbat, Horia Alejandro; Botello, S. (Universitat Politècnica de Catalunya. CIMNE, 2017)
      Article
      Accés obert
      En este artículo se describe una nueva metodología para evaluar el efecto de las explosiones a cielo abierto sobre estructuras equivalentes a las fachadas de los edificios. El daño sufrido por la estructura se define ...
    • Nuevo algoritmo de compensación térmica para sensores de presión piezorresistivos basado en la aproximación lineal por segmentos 

      Hernández, A.; Farah, L.E.; Ramírez, J.; Charry, E. (Universitat Politècnica de Catalunya. CIMNE, 2015)
      Article
      Accés obert
      Los sensores de presión piezorresistivos son ampliamente utilizados en aplicaciones de control y monitorización dentro del sector industrial. Estos sensores presentan problemas de dependencia térmica y no linealidades que ...
    • Numeric analysis 

      Pérez Segarra, Carlos David; Ortega, Enrique (2009-10-14)
      Audiovisual
      Accés obert