Exploració per autor "Díez, Pedro"
Ara es mostren els items 124-143 de 145
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Real time parameter identification and solution reconstruction from experimental data using the Proper Generalized Decomposition
Nadal, Enrique; Chinesta, Francisco; Díez, Pedro; Fuenmayor, F. J.; Denia, F.D. (2015-11-01)
Article
Accés obertSome industrial processes are modelled by parametric partial differential equations. Integrating computational modelling and data assimilation into the control process requires obtaining a solution of the numerical model ... -
Recovering lower bounds of the error by postprocessing implicit residual a posteriori error estimates
Díez, Pedro; Parés Mariné, Núria; Huerta, Antonio (2003-03)
Article
Accés obertClassical residual type error estimators approximate the error flux around the elements and yield upper bounds of the exact (or reference) error. Lower bounds of the error are also needed in goal oriented adaptivity and ... -
Remeshing criteria and proper error representations for goal oriented h-adaptivity
Díez, Pedro; Calderón, Giovanni (2007-01)
Article
Accés obertA key ingredient in h-adaptivity pertains to the transformation of output data from a given error estimator into input data, usually in the form of an element-size distribution, that needs to be supplied to a mesh ... -
Sampling-based stochastic analysis of the PKN model for hydraulic fracturing
Garikapati, Hasini; Verhoosel, Clemens V.; van Brummelen, Harald; Zlotnik, Sergio; Díez, Pedro (2019-02)
Article
Accés obertHydraulic fracturing processes are surrounded by uncertainty, as available data is typically scant. In this work, we present a sampling-based stochastic analysis of the hydraulic fracturing process by considering various ... -
Simple assessment of the numerical wave number in the fe solution of the helmholtz equation
Steffens, Lindaura Maria; Díez, Pedro (2009-06-08T11:13:41Z)
Text en actes de congrés
Accés obertWhen numerical methods are applied to the computation of stationary waves, it is observed that "numerical waves" are dispersive for high wave numbers. The numerical wave shows a phase velocity which depends on the wave ... -
Simulación numérica del hormigón reforzado con fibras de acero
Pros Parés, Alba; Díez, Pedro; Molins i Borrell, Climent (Asociacion Científica del Hormigón Estructural (ACHE), 2011)
Text en actes de congrés
Accés restringit per política de l'editorialEl Hormigón Reforzado con Fibras de Acero (HRFA) es una técnica que consiste en añadir fibras de acero en el hormigón. La forma, las dimensiones, la esbeltez, la orientación y la distribución de las fibras caracterizan el ... -
Small-scale gravitational instabilities under the oceans: implications for the evolution of oceanic lithosphere and its expression in geophysical observables
Zlotnik, Sergio; Afonso, Juan Carlos; Díez, Pedro; Fernández, Manel (2008-10)
Article
Accés obertSublithospheric small-scale convection (SSC) is thought to be responsible for the flattening of the seafloor depth and surface heat flow observed in mature plates. Although the existence of SSC is generally accepted, its ... -
Strict error bounds for linear and nonlinear solid mechanics problems using a patch-based flux-free method
Cottereau, Regis; Chamoin, Ludovic; Díez, Pedro (2010-12)
Article
Accés obertWe discuss, in this paper, a common ux-free method for the computation of strict error bounds for linear and nonlinear Finite Element computations. In the linear case, the error bounds are on the energy norm of the error, ... -
Strict error bounds for linear solid mechanics problems using a subdomain-based flux-free method
Cottereau, R; Díez, Pedro; Huerta, Antonio (2009-09)
Article
Accés obertWe discuss, in this paper, a flux-free method for the computation of strict upper bounds of the energy norm of the error in a Finite Element (FE) computation. The bounds are strict in the sense that they refer to the ... -
Strict error bounds in linear solid mechanics using a subdomain-based flux-free approach
Cottereau, Regis; Díez, Pedro (2009-06-08T11:56:46Z)
Text en actes de congrés
Accés obertIn this paper, we derive, in the framework of the ux-free method, strict bounds for the energy norm of the error associated to a finite element computation. In that framework, and when using linear elements, the problems ... -
Subdomain-based flux-free a posteriori error estimators
Parés Mariné, Núria; Díez, Pedro; Huerta, Antonio (2006-01)
Article
Accés obertA new residual type flux-free error estimator is presented. It estimates upper and lower bounds of the error in energy norm. The proposed approach precludes the main drawbacks of standard residual type estimators, circumvents ... -
SUPG-based stabilization using a separated representations approach
González, D.; Debeugny, L.; Cueto, E.; Chinesta, F.; Díez, Pedro; Huerta, Antonio (2010-04)
Article
Accés obertWe have developed a new method for the construction of Streamline Upwind Petrov Galerkin (SUPG) stabilization techniques for the resolution of convection-diffusion equations based on the use of separated representations inside ... -
Towards real time assessment of earthfill dams via Model Order Reduction
Nasika, Christina; Díez, Pedro; Gerard, Pierre; Massart, Thierry J.; Zlotnik, Sergio (2022-02-01)
Article
Accés obertThe use of Internet of Things (IoT) technologies is becoming a preferred solution for the assessment of tailings dams’ safety. Real-time sensor monitoring proves to be a key tool for reducing the risk related to these ... -
Un estimador de error residual para el método de los elementos finitos
Egozcue Rubí, Juan José; Díez, Pedro; Huerta, Antonio (1998)
Article
Accés obertLos estimadores de error residuales se basan en resolver de manera aproximada la ecuación que caracteriza al error. En este artículo se presenta un estimador de error basado en la resolución de problemas locales mediante ... -
Un estimador de error residual semiexplícito en cantidades de interés para un problema mecánico lineal
Rosales, R.; Díez, Pedro (Universitat Politècnica de Catalunya. CIMNE, 2016-10)
Article
Accés obertEl objetivo de este trabajo es definir un método semiexplícito para estimar el error en cantidades de interés derivado de la resolución por elementos finitos de un problema de elasticidad lineal. En este proceso, se ... -
Unified formulation of a family of iterative solvers for power systems analysis
Borzacchiello, Domenico; Chinesta, Francisco; Malik, Muhammad H.; García Blanco, Raquel; Díez, Pedro (2016-11)
Article
Accés obertThis paper illustrates the construction of a new class of iterative solvers for power flow calculations based on the method of Alternating Search Directions. This method is fit to the particular algebraic structure of the ... -
Using reduced basis approximation for efficient surrogate-based inverse identification of thermo-hydro-mechanical parameters from an in situ heating test
Larion, Ygee; Chen, Guangjing; Zlotnik, Sergio; Díez, Pedro; Seetharam, Suresh; Massart, Thierry J. (Springer Nature, 2022-06-27)
Article
Accés obertIn this paper, a reduced-order model built from the reduced basis (RB) method is used as a surrogate for an inverse identification problem related to coupled thermo-hydro-mechanical (THM) processes. The RB space—spanned ... -
Verification of reduced-order models for real-time applications with haptic feedback
González, D.; Díez, Pedro; Zlotnik, Sergio; Cueto, E.; Chinesta, Francisco (CIMNE, 2015)
Text en actes de congrés
Accés obertReal-time simulation systems equipped with haptic peripherals, like those employed in virtual surgery or industry lay-out design, require feedback rates on the order of 1kHz. Such an impressive requirement for a simulation ... -
Vulnerabilidad sísmica y toma de decisiones
Egozcue Rubí, Juan José; Simarro Grande, Gonzalo; Díez, Pedro (1997-05)
Article
Accés obert -
XFEM+ : una modificación de XFEM para mejorar la precisión de los flujos locales en problemas de difusión con conductividades muy distintas
Cordero, Felipe; Díez, Pedro (Universitat Politècnica de Catalunya. CIMNE, 2010)
Article
Accés obertCuando se aplica XFEM a los problemas de difusión en un sistema de multiples fases, esta popular estrategia produce una representación inexacta de los flujos en la vecindad de la interfase. El enriquecimiento XFEM mejora ...