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Ara es mostren els items 70395-70414 de 245871

    • DnaSP, DNA polymorphism analyses by the coalescent and other methods 

      Rozas, Julio; Sánchez del Barrio, Juan C.; Messeguer Peypoch, Xavier; Rozas, Ricardo (2003-12)
      Article
      Accés obert
      DnaSP is a software package for the analysis of DNA polymorphism data. Present version introduces several new modules and features which, among other options allows, 1) handling big data sets (~5 Mbp per sequence); 2) ...

    • DNB and Void Fraction TRACE Model Validation with PSBT Experiments 

      Jara Heredia, Daniel (Universitat Politècnica de Catalunya / Kungliga Tecniska Högskolan, 2010)
      Projecte/Treball Final de Carrera
      Accés obert
      The aim of the thesis is the assessment and validation of numerical models for the prediction of detailed subchannel distribution and departure from nucleate boiling (DNB) to a full scale data on a prototypical PWR rod ...

    • DNMR measurements of an asymmetric odd liquid crystal dimer: determination of the intramolecular angle and the degree of order of the two rigid cores 

      Sebastian Ugarteche, Nerea; Zupancic, Blaz; López Pérez, David Orencio; Salud Puig, Josep; López de Rioja, Víctor; Levit Valenzuela, Rafael; de la Fuente Lavin, Maria Rosario; Ros Latienda, Maria Blanca; Díez Berart, Sergio; Robles Hernández, Beatriz (Royal Society of Chemistry (RSC), 2023)
      Article
      Accés obert
      In this work, we present a Deuteron Nuclear Magnetic Resonance (DNMR) study of the non-symmetric odd liquid crystal dimer a-(4-cyanobiphenyl-4'-yloxy)-¿-(1-pyrenimine-benzylidene-4'-oxy) heptane (CBO7O.Py), formed by a ...

    • DNN pruning with principal component analysis and connection importance estimation 

      Riera Villanueva, Marc; Arnau Montañés, José María; González Colás, Antonio María (2022-01)
      Article
      Accés obert
      DNN pruning reduces memory footprint and computational work of DNN-based solutions to improve performance and energy-efficiency. An effective pruning scheme should be able to systematically remove connections and/or neurons ...

    • DNN speaker embeddings using autoencoder pre-training 

      Khan, Umair; Hernando Pericás, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Over the last years, i-vectors have been the state-of-the-art approach in speaker recognition. Recent improvements in deep learning have increased the discriminative quality of i-vectors. However, deep learning architectures ...

    • DNN-based PolSAR image classification on noisy labels 

      Ni, Jun; Xiang, Deliang; Lin, Zhiyuan; López Martínez, Carlos; Hu, Wei; Zhang, Fan (2022-04-22)
      Article
      Accés obert
      Deep neural networks (DNNs) appear to be a solution for the classification of polarimetric synthetic aperture radar (PolSAR) data in that they outperform classical supervised classifiers under the condition of sufficient ...

    • DNS and LES for simulating stratocumulus: Better together 

      Mellado González, Juan Pedro; Bretherton, Christopher; Stevens, Bjorn; Wyant, Matt (2018-07-05)
      Article
      Accés obert
      We argue that combining direct numerical simulation (DNS) with large-eddy simulation (LES) and field studies could accelerate current lines of stratocumulus research. LES allows for a faster and more holistic study of ...

    • DNS and LES of buoyancy-driven turbulence at high Rayleigh numbers: numerical methods and SGS models 

      Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Santos Serrano, Daniel; Gorobets, Andrei; Oliva Llena, Asensio (Springer, 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Buoyancy-driven flows have always been an important subject of scientific studies with numerous applications in environment and technology.

    • DNS and LES on unstructured grids: playing with matrices to preserve symmetries using a minimal set of algebraic kernels 

      Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Alsalti Baldellou, Àdel; Gorobets, Andrei; Oliva Llena, Asensio (Scipedia, 2022)
      Text en actes de congrés
      Accés obert
      The essence of turbulence are the smallest scales of motion. They result from asubtle balance between two differential operators differing in symmetry: The convective operator is skew-symmetric, whereas the diffusive is ...

    • DNS and POD analysis of separated flow in a three-dimensional diffuser 

      Miró Jané, Arnau; Eiximeno Franch, Benet; Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol (Springer, 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A DNS of a three dimensional diffuser has been performed with the in-house solver Alya. The resulting dataset presents a good agreement with existing numerical and experimental data, even without smoothing of the sharp ...

    • DNS and RANS simulations of a coil heat exchanger immersed in a tank 

      Vera i Fernández, Jordi; Torras Ortiz, Santiago; Schillaci, Eugenio; Oliva Llena, Asensio (Begell House, 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The operation of heat exchangers in a thermal system can be described by simple heat transfer equations. The heat exchange is normally defined by a global heat transfer coefficient, which takes into account internal and ...

    • DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5 

      Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013-01-15)
      Article
      Accés obert
      This work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ...

    • DNS of a Backward-Facing Step at high Reynolds number. Towards a better understanding of RANS-LES transition in DES models 

      Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A DNS of an incompressible fluid flow over a Backward Facing Step (BFS ) with an Expansion Ratio (ER ) equal to 2, ER = H/(H - h), has been performed. Where h and H represent the step and the outlet heights, respectively. ...

    • DNS of Drag-Force and Reactive Mass Transfer in Gravity-Driven Bubbly Flows 

      Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Springer, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Mass transfer processes in bubbly flows are relevant in both nature and industry. Multiple examples arise from the so-called unit operations of the chemical engineering, where bubble columns are used for separation processes, ...

    • DNS of drag-force and reactive mass transfer in gravity-driven bubbly flows 

      Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • DNS of falling droplets in a vertical channel 

      Balcázar Arciniega, Néstor; Castro González, Jesús; Chiva Segura, Jorge; Oliva Llena, Asensio (WIT Press, 2018-02-01)
      Article
      Accés obert
      This paper presents Direct Numerical Simulation (DNS) of the falling motion of single and multiple deformable drops in a vertical channel. A systematic study of the wall effect on the motion of single drop is performed for ...

    • DNS of Mass Transfer from Bubbles Rising in a Vertical Channel 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Springer, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents Direct Numerical Simulation of mass transfer from buoyancy-driven bubbles rising in a wall-confined vertical channel, through a multiple markers level-set method. The Navier-Stokes equations and mass ...

    • DNS of Mass Transfer in Bi-dispersed Bubble Swarms 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents Direct Numerical Simulation of mass transfer in a bi-dispersed bubble swarm at high Reynolds number, by using a multiple marker level-set method. Transport equations are discretized by the finite-volume ...

    • DNS of mass transfer in bi-dispersed bubbly flows in a vertical pipe 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Springer, 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Mass transfer in bubbly flows is ubiquitous in nature and industry. For instance, bubble chemical reactors and mass-transfer operations of chemical engineering (e.g., distillation columns) employ bubbly flows to produce ...

    • DNS of mass transfer in turbulent bubbly flow in a vertical pipe 

      Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2021)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The present research focuses on the DNS of mass transfer in gravity-driven turbulent bubbly flow in a vertical pipe, at a high Reynolds number (Re approximates to 1000). The objective is to compute the mass transfer ...