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+34 946 567 842
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+34 946 567 842
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dpardo@bcamath.org
Information of interest
- Orcid: 0000-0002-1101-2248
Past Research Professor and Team Leader "Multiphysics, Inversion and Petroleum" research line.
David Pardo received the B.S. degree in mathematics from the University of The Basque Country, Spain, in 2000, and the M.S. and Ph.D. degrees in computational and applied mathematics from The University of Texas at Austin, in 2002 and 2004, respectively. Then, he worked as a Postdoctoral Fellow and Research Associate at the Petroleum and Geosystems Engineering at The University of Texas at Austin during the period 2004-2008. Since Sept. 2008, he is a Research Professor and team leader of the group "Multiphysics, Inversion and Petroleum" at the Basque Center for Applied Mathematics (BCAM). Since Sept. 2009, he is also a Research Professor at IKERBASQUE, the Basque Foundation for Sciences. He has published over 50 publications and he has given over 80 presentations. His research interests include computational electromagnetics, petroleum-engineering applications (borehole simulations), adaptive finite-element methods, multigrid solvers, and multiphysics and inverse problems.
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Semi-blind-trace algorithm for self-supervised attenuation of trace-wise coherent noise
Abedi, M.M.
; Pardo, D.; Alkhalifah, T. (2024-03-01)
Trace-wise noise is a type of noise often seen in seismic data, which is characterized by vertical coherency and horizontal incoherency. Using self-supervised deep learning to attenuate this type of noise, the conventional ...
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Multimodal variational autoencoder for inverse problems in geophysics: application to a 1-D magnetotelluric problem
Rodriguez, O.; Taylor, J.M.; Pardo, D. (2023-12)
Estimating subsurface properties from geophysical measurements is a common inverse problem. Several Bayesian methods currently aim to find the solution to a geophysical inverse problem and quantify its uncertainty. However, ...
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Fast parallel IGA-ADS solver for time-dependent Maxwell's equations
Los, M.; Wozniak, M.; Pingali, K.; Garcia-Castillo, L.E.; Alvarez-Aramberri, J.; Pardo, D.; Paszyński, M. (2023-12)
We propose a simulator for time-dependent Maxwell's equations with linear computational cost. We employ B-spline basis functions as considered in the isogeometric analysis (IGA). We focus on non-stationary Maxwell's equations ...
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Diagnosis of the health status of mooring systems for floating offshore wind turbines using autoencoders
Gorostidi, N.; Pardo, D.; Nava, V. (2023-11-01)
Floating offshore wind turbines (FOWTs) show promise in terms of energy production, availability, and sustainability, but remain unprofitable due to high maintenance costs. This work proposes a deep learning algorithm to ...
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Machine learning discovery of optimal quadrature rules for isogeometric analysis
Teijeiro, T.; Taylor, J.M.; Hashemian, A.; Pardo, D. (2023-11-01)
We propose the use of machine learning techniques to find optimal quadrature rules for the construction of stiffness and mass matrices in isogeometric analysis (IGA). We initially consider 1D spline spaces of arbitrary ...
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Physics-guided deep-learning inversion method for the interpretation of noisy logging-while-drilling resistivity measurements
Noh, K.; Pardo, D.; Torres-Verdín, C. (2023-10)
Deep learning (DL) inversion is a promising method for real-Time interpretation of logging-while-drilling (LWD) resistivity measurements for well-navigation applications. In this context, measurement noise may significantly ...
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Bridge damage identification under varying environmental and operational conditions combining Deep Learning and numerical simulations
Fernandez-Navamuel, A.; Pardo, D.; Garcia-Sanchez, D.; Zamora-Sánchez, D.; Magalhães, F.; Omella, Ángel J. (2023-10)
This work proposes a novel supervised learning approach to identify damage in operating bridge structures. We propose a method to introduce the effect of environmental and operational conditions into the synthetic damage ...
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Neural network architecture optimization using automated machine learning for borehole resistivity measurements
Shahriari, M.; Pardo, D.; Kargaran, S.; Teijeiro, T. (2023-09)
Deep neural networks (DNNs) offer a real-time solution for the inversion of borehole resistivity measurements to approximate forward and inverse operators. Using extremely large DNNs to approximate the operators is possible, ...
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An exponential integration generalized multiscale finite element method for parabolic problems
Contreras, L. F.; Pardo, D.; Abreu, E.; Muñoz-Matute, J.; Diaz, C.; Galvis, J. (2023-04-15)
We consider linear and semilinear parabolic problems posed in high-contrast multiscale media in two dimensions. The presence of high-contrast multiscale media adversely affects the accuracy, stability, and overall efficiency ...
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A Deep Double Ritz Method (D2RM) for solving Partial Differential Equations using Neural Networks
Uriarte, C.; Pardo, D.; Muga, I.; Muñoz-Matute, J. (2023-02-15)
Residual minimization is a widely used technique for solving Partial Differential Equations in variational form. It minimizes the dual norm of the residual, which naturally yields a saddle-point (min–max) problem over the ...
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On building physics-based AI models for the design and SHM of mooring systems
Nava, V.; Aristondo, A.; Varo, V.; Esteras, M.; Touzon, I.; Boto, F.; Mendikoa, I.; Ruiz-Minguela, P.; Gil-Lopez, S.; Gorostidi, N.; Pardo, D. (2023-01-01)
Expert systems in industrial processes are modelled using physics-based approaches, data-driven models or hybrid approaches in which however the underlying physical models generally constitute a separate block with respect ...
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Memory-Based Monte Carlo Integration for Solving Partial Differential Equations Using Neural Networks
Uriarte, C.; Taylor, J.M.; Pardo, D.; Rodríguez, O.A.; Vega (2023)
Monte Carlo integration is a widely used quadrature rule to solve Partial Differential Equations with neural networks due to its ability to guarantee overfitting-free solutions and high-dimensional scalability. However, ...
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A Multidirectional Deep Neural Network for Self-Supervised Reconstruction of Seismic Data
Abedi, M.M.; Pardo, D. (2022-12-06)
Seismic studies exhibit gaps in the recorded data due to surface obstacles. To fill in the gaps with self-supervised deep learning, the network learns to predict different events from the recorded parts of data and then ...
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A painless multi-level automatic goal-oriented hp-adaptive coarsening strategy for elliptic and non-elliptic problems
Caro, F.V.; Darrigrand, V.; Alvarez-Aramberri, J.; Alberdi, E.; Pardo, D. (2022-11-01)
This work extends an automatic energy-norm $hp$-adaptive strategy based on performing quasi-optimal unrefinements to the case of non-elliptic problems and goal-oriented adaptivity. The proposed approach employs a multi-level ...
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Refined isogeometric analysis of quadratic eigenvalue problems
Hashemian, A.; Garcia, D.; Pardo, D.; Calo, V.M. (2022-07-16)
Certain applications that analyze damping effects require the solution of quadratic eigenvalue problems (QEPs). We use refined isogeometric analysis (rIGA) to solve quadratic eigenproblems. rIGA discretization, while ...
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Exploiting the Kronecker product structure of φ−functions in exponential integrators
Muñoz-Matute, J.; Pardo, D.; Calo, Victor M. (2022-05-15)
Exponential time integrators are well-established discretization methods for time semilinear systems of ordinary differential equations. These methods use (Formula presented.) functions, which are matrix functions related ...
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Supervised Deep Learning with Finite Element simulations for damage identification in bridges
Fernandez-Navamuel, A.; Zamora-Sánchez, Diego; Omella, Ángel J.; Pardo, D.; Garcia-Sanchez, David; Magalhães, Filipe (2022-04-15)
This work proposes a supervised Deep Learning approach for damage identification in bridge structures. We employ a hybrid methodology that incorporates Finite Element simulations to enrich the training phase of a Deep ...
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On quadrature rules for solving Partial Differential Equations using Neural Networks
Rivera, J.A; Taylor, J.M.; Omella, Ángel J.; Pardo, D. (2022-04-01)
Neural Networks have been widely used to solve Partial Differential Equations. These methods require to approximate definite integrals using quadrature rules. Here, we illustrate via 1D numerical examples the quadrature ...
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Error representation of the time-marching DPG scheme
Muñoz-Matute, J.; Demkowicz, Leszek; Pardo, D. (2022-03-01)
In this article, we introduce an error representation function to perform adaptivity in time of the recently developed time-marching Discontinuous Petrov–Galerkin (DPG) scheme. We first provide an analytical expression for ...
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Nonhyperbolic normal moveout stretch correction with deep learning automation
Abedi, M.M.; Pardo, D. (2022-02-15)
Normal-moveout (NMO) correction is a fundamental step in seismic data processing. It consists of mapping seismic data from recorded traveltimes to corresponding zero-offset times. This process produces wavelet stretching ...
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Deep learning enhanced principal component analysis for structural health monitoring
Fernandez-Navamuel, A.; Magalhães, Filipe; Zamora-Sánchez, Diego; Omella, Ángel J.; Garcia-Sanchez, David; Pardo, D. (2022-01-01)
This paper proposes a Deep Learning Enhanced Principal Component Analysis (PCA) approach for outlier detection to assess the structural condition of bridges. We employ partially explainable autoencoder architecture to ...
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2.5-D Deep Learning Inversion of LWD and Deep-Sensing em Measurements Across Formations with Dipping Faults
Noh, Kyubo; Pardo, D.; Torres-Verdin, Carlos (2022-01-01)
Deep learning (DL) inversion of induction logging measurements is used in well geosteering for real-time imaging of the distribution of subsurface electrical conductivity. We develop a DL inversion workflow to solve 2.5-D ...
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1D Painless Multi-level Automatic Goal-Oriented h and p Adaptive Strategies Using a Pseudo-Dual Operator
Caro, F.V.; Darrigrand, V.; Alvarez-Aramberri, J.; Alberdi, E.; Pardo, D. (2022-01-01)
The main idea of our Goal-Oriented Adaptive (GOA) strategy is based on performing global and uniform h- or p-refinements (for h- and p-adaptivity, respectively) followed by a coarsening step, where some basis functions are ...
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A Deep Fourier Residual Method for solving PDEs using Neural Networks
Taylor, J.M.; Pardo, D.; Muga, I. (2022)
When using Neural Networks as trial functions to numerically solve PDEs, a key choice to be made is the loss function to be minimised, which should ideally correspond to a norm of the error. In multiple problems, this ...
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Predictive Maintenance of Floating Offshore Wind Turbine Mooring Lines using Deep Neural Networks
Gorostidi, N.; Nava, V.; Aristondo, A.; Pardo, D. (2022)
The recent massive deployment of onshore wind farms has caused controversy to arise mainly around the issues of land occupation, noise and visual pollution and impact on wildlife. Fixed offshore turbines, albeit beneficial ...
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Uncertainty Quantification on the Inversion of Geosteering Measurements using Deep Learning
Rivera, J.A; Shahriari, M; Pardo, D.; Omella, J.; Torres-Verdín, C. (2021-11-01)
We propose the use of a Deep Learning (DL) algorithm for the real-time inversion of electromagnetic measurements acquired during geosteering operations. Moreover, we show that when the DL algorithm is equipped with a ...
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Approximations for traveltime, slope, curvature, and geometrical spreading of elastic waves in layered transversely isotropic media
Abedi, M.M.; Pardo, D.; Stovas, A. (2021-10)
Each seismic body wave, including quasi compressional, shear, and converted wave modes, carries useful subsurface information. For processing, imaging, amplitude analysis, and forward modeling of each wave mode, we need ...
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Massive Database Generation for 2.5D Borehole Electromagnetic Measurements using Refined Isogeometric Analysis
Hashemian, A.; Garcia, D.; Rivera, J.A.; Pardo, D. (2021-06)
Borehole resistivity measurements are routinely inverted in real-time during geosteering operations. The inversion process can be efficiently performed with the help of advanced artificial intelligence algorithms such as ...
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Deep learning driven self-adaptive hp finite element method
Paszyński, M.; Grzeszczuk, R.; Pardo, D.; Demkowicz, L. (2021-06)
The fi nite element method (FEM) is a popular tool for solving engineering problems governed by Partial Di fferential Equations (PDEs). The accuracy of the numerical solution depends on the quality of the computational ...
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Large-offset P-wave traveltime in layered transversely isotropic media
Abedi, M.M.; Pardo, D. (2021-05-01)
Large-offset seismic data processing, imaging, and velocity estimation require an accurate traveltime approximation over a wide range of offsets. In layered transversely isotropic media with a vertical symmetry axis, the ...
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Modeling extra-deep electromagnetic logs using a deep neural network
Alyaev, S.; Shahriari, M.; Pardo, D.; Omella, A. J.; Larsen, D.; Jahani, N.; Suter, E. (2021-05)
Modern geosteering is heavily dependent on real-time interpretation of deep electromagnetic (EM) measurements. We have developed a methodology to construct a deep neural network (DNN) model trained to reproduce a full set ...
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Refined isogeometric analysis for generalized Hermitian eigenproblems
Hashemian, A.; Pardo, D.; Calo, V.M. (2021-04)
We use refined isogeometric analysis (rIGA) to solve generalized Hermitian eigenproblems (Ku = λMu). rIGA conserves the desirable properties of maximum-continuity isogeometric analysis (IGA) while it reduces the solution ...
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Goal-oriented adaptivity for a conforming residual minimization method in a dual discontinuous Galerkin norm
Rojas, S.; Pardo, D.; Behnoudfare, P.; Calo, V. M. (2021-03)
We propose a goal-oriented mesh-adaptive algorithm for a finite element method stabilized via residual minimization on dual discontinuous-Galerkin norms. By solving a saddle-point problem, this residual minimization delivers ...
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A Simulation Method for the Computation of the E
Omella, A. J.; Alvarez-Aramberri, J.; Strugaru, M.; Darrigrand, V.; Pardo, D.; Gonzalez, H.; Santos, C. (2021-03)
We propose a set of numerical methods for the computation of the frequency-dependent eff ective primary wave velocity of heterogeneous rocks. We assume the rocks' internal microstructure is given by micro-computed tomography ...
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Vibration-Based SHM Strategy for a Real Time Alert System with Damage Location and Quantification
Fernandez - Navamuel, A.; Zamora - Sánchez, D.; Varona - Poncela, T.; Jiménez - Fernández, C.; Díez - Hernández, J.; García Sánchez, D.; Pardo, D. (2021-01-11)
We present a simple and fully automatable vibration-based Structural Health Monitoring (SHM) alert system. The proposed method consists in applying an Automated Frequency Domain Decomposition (AFDD) algorithm to obtain the ...
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Vibration-Based SHM Strategy for a Real Time Alert System with Damage Location and Quantification
Fernández-Navamuel, A.; Zamora-Sánchez, D.; Varona-Poncela, T.; Jiménez-Fernández, C.; Díez-Hernández, J.; García-Sánchez, D.; Pardo, D. (2021-01)
We present a simple and fully automatable vibration-based Structural Health Monitoring (SHM) alert system. The proposed method consists in applying an Automated Frequency Domain Decomposition (AFDD) algorithm to obtain the ...
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A Finite Element based Deep Learning solver for parametric PDEs
Uriarte, C.; Pardo, D.; Omella, A. J. (2021)
We introduce a dynamic Deep Learning (DL) architecture based on the Finite Element Method (FEM) to solve linear parametric Partial Differential Equations(PDEs). The connections between neurons in the architecture mimic the ...
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A MULTIDIRECTIONAL DEEP NEURAL NETWORK FOR SELF-SUPERVISED RECONSTRUCTION OF SEISMIC DATA
Abedi, M.M.; Pardo, D. (2021)
Seismic studies exhibit gaps in the recorded data due to surface obstacles. To fill in the gaps with self-supervised deep learning, the network learns to predict different events from the recorded parts of data and then ...
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Equivalence between the DPG method and the Exponential Integrators for linear parabolic problems
Muñoz-Matute, J.; Pardo, D.; Demkowicz, L. (2020-11)
The Discontinuous Petrov-Galerkin (DPG) method and the exponential integrators are two well established numerical methods for solving Partial Di fferential Equations (PDEs) and sti ff systems of Ordinary Di fferential ...
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A DPG-based time-marching scheme for linear hyperbolic problems
Muñoz-Matute, J.; Pardo, D.; Demkowicz, L. (2020-11)
The Discontinuous Petrov-Galerkin (DPG) method is a widely employed discretization method for Partial Di fferential Equations (PDEs). In a recent work, we applied the DPG method with optimal test functions for the time ...
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Error Control and Loss Functions for the Deep Learning Inversion of Borehole Resistivity Measurements
Shahriari, M.; Pardo, D.; Rivera, J.A.; Torres-Verdín, C.; Picon, A.; Ossandón, S.; Calo, V.M.; Del Ser, J. (2020-11)
Deep learning (DL) is a numerical method that approximates functions. Recently, its use has become attractive for the simulation and inversion of multiple problems in computational mechanics, including the inversion of ...
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Bearing assessment tool for longitudinal bridge performance
Garcia-Sanchez, D.; Fernandez-Navamuel, A.; Zamora, D.; Alvear, D.; Pardo, D. (2020-09)
This work provides an unsupervised learning approach based on a single-valued performance indicator to monitor the global behavior of critical components in a viaduct, such as bearings. We propose an outlier detection ...
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Sensitivity and Uncertainty Analysis by Discontinuous Galerkin of Lock-in Thermography for Crack Characterization
Omella, A. J.; Celorrio, R.; Pardo, D. (2020-09)
This work focuses on the characterization of narrow vertical cracks of nite size using optically excited lock-in thermography (OLT). To characterize these cracks, we need to solve an ill-posed inverse problem. As a previous ...
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Design of Loss Functions for Solving Inverse Problems using Deep Learning
Rivera, J.A.; Pardo, D.; Alberdi, E. (2020-05)
Solving inverse problems is a crucial task in several applications that strongly a ffect our daily lives, including multiple engineering fields, military operations, and/or energy production. There exist different methods ...
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Error Control and Loss Functions for the Deep Learning Inversion of Borehole Resistivity Measurements
Shahriari, M.; Rivera, J.A.; Pardo, D.; Torres-Verdín, C.; Picon, A.; Del Ser, J.; Ossandón, S.; Calo, V.M. (2020-05)
Deep learning (DL) is a numerical method that approximates functions. Recently, its use has become attractive for the simulation and inversion of multiple problems in computational mechanics, including the inversion of ...
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A Deep Learning Approach to the Inversion of Borehole Resistivity Measurements
Shahriari, M.; Pardo, D.; Picon, A.; Galdran, A.; Del Ser, J.; Torres-Verdin, C. (2020-04)
Borehole resistivity measurements are routinely employed to measure the electrical properties of rocks penetrated by a well and to quantify the hydrocarbon pore volume of a reservoir. Depending on the degree of geometrical ...
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A Painless Automatic hp-Adaptive Strategy for Elliptic Problems
Darrigrand, V.; Pardo, D.; Chaumont-Frelet, T.; Gómez-Revuelto, I.; Garcia-Castillo, E. (2020-01)
In this work, we introduce a novel hp-adaptive strategy. The main goal is to minimize the complexity and implementational efforts hence increasing the robustness of the algorithm while keeping close to optimal numerical ...
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A Deep Neural Network as Surrogate Model for Forward Simulation of Borehole Resistivity Measurements
Shahriari, M.; Pardo, D.; Moser, B. (2020-01)
Inverse problems appear in multiple industrial applications. Solving such inverse problems require the repeated solution of the forward problem. This is the most time-consuming stage when employing inversion techniques, ...
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Borehole Resistivity Simulations of Oil-Water Transition Zones with a 1.5D Numerical Solver
Shahriari, M.; Pardo, D. (2020)
When simulating borehole resistivity measurements in a reservoir, it is common to consider an oilwater contact (OWC) planar interface. However, this consideration can lead to an unrealistic model since in the presence of ...
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Variational Formulations for Explicit Runge-Kutta Methods
Muñoz-Matute, J.; Pardo, D.; Calo, V.M.; Alberdi, E. (2019-08)
Variational space-time formulations for partial di fferential equations have been of great interest in the last decades, among other things, because they allow to develop mesh-adaptive algorithms. Since it is known ...
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Explicit-in-Time Goal-Oriented Adaptivity
Muñoz-Matute, J.; Calo, V.M.; Pardo, D.; Alberdi, E.; Van der Zee, K.G. (2019-04-15)
Goal-oriented adaptivity is a powerful tool to accurately approximate physically relevant solution features for partial differential equations. In time dependent problems, we seek to represent the error in the quantity of ...
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Forward-in-Time Goal-Oriented Adaptivity
Muñoz-Matute, J.; Pardo, D.; Calo, V.M.; Alberdi, E. (2019-03)
In goal-oriented adaptive algorithms for partial differential equations, we adapt the finite element mesh in order to reduce the error of the solution in some quantity of interest. In time-dependent problems, this adaptive ...
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Refined Isogeometric Analysis for fluid mechanics and electromagnetism
Garcia, D.; Pardo, D.; Calo, V.M. (2019-03)
Starting from a highly continuous isogeometric analysis discretization, we introduce hyperplanes that partition the domain into subdomains and reduce the continuity of the discretization spaces at these hyperplanes. As the ...
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Adjoint-based formulation for computing derivatives with respect to bed boundary positions in resistivity geophysics
Chaumont-Frelet, T.; Shahriari, M.; Pardo, D. (2019-02)
In inverse geophysical resistivity problems, it is common to optimize for specific resistivity values and bed boundary positions, as needed, for example, in geosteering applications. When using gradient-based inversion ...
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Parallel refined Isogeometric Analysis in 3D
Siwik, L.; Wozniak, M.; Trujillo, V.; Pardo, D.; Calo, V.M.; Paszynski, M. (2018-11)
We study three-dimensional isogeometric analysis (IGA) and the solution of the resulting system of linear equations via a direct solver. IGA uses highly continuous $C^{p-1}$ basis functions, which provide multiple benefits ...
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Finite element approximation of electromagnetic fields using nonfitting meshes for Geophysics
Chaumont-Frelet, T.; Nicaise, S.; Pardo, D. (2018-07)
We analyze the use of nonfitting meshes for simulating the propagation of electromagnetic waves inside the earth with applications to borehole logging. We avoid the use of parameter homogenization and employ standard edge ...
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Asymptotic Models for the Electric Potential across a Highly Conductive Casing
Erdozain, A.; Péron, V.; Pardo, D. (2018-07)
We analyze a configuration that involves a steel-cased borehole, where the casing that covers the borehole is considered as a highly conductive thin layer. We develop an asymptotic method for deriving reduced problems ...
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Refined Isogeometric Analysis for a Preconditioned Conjugate Gradient Solver
Garcia, D.; Pardo, D.; Dalcin, L.; Calo, V.M. (2018-06-15)
Starting from a highly continuous Isogeometric Analysis (IGA) discretization, refined Isogeometric Analysis (rIGA) introduces $C^0$ hyperplanes that act as separators for the direct LU factorization solver. As a result, ...
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A Numerical 1.5D Method for the Rapid Simulation of Geophysical Resistivity Measurements
Shahriari, M.; Rojas, S.; Pardo, D.; Rodríguez-Rozas, A.; Bakr, S.A.; Calo, V.M.; Muga, I. (2018-06-14)
In some geological formations, borehole resistivity measurements can be simulated using a sequence of 1D models. By considering a 1D layered media, we can reduce the dimensionality of the problem from 3D to 1.5D via a ...
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Fast 2.5D Finite Element Simulations of Borehole Resistivity Measurements
Rodriguez-Rozas, A.; Pardo, D.; Torres-Verdin, C. (2018-05-29)
We develop a rapid 2.5-dimensional (2.5D) finite element method for simulation of borehole resistivity measurements in transversely isotropic (TI) media. The method combines arbitrary high-order $H^1$ - and $H$ (curl)-conforming ...
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Finite Element Simulations of Logging-While-Drilling and Extra-Deep Azimuthal Resistivity Measurements using Non-Fitting Grids
Chaumont-Frelet, T.; Pardo, D.; Rodriguez-Rozas, A. (2018-04-27)
We propose a discretization technique using non-fitting grids to simulate magnetic field-based resistivity logging measurements. Non-fitting grids are convenient because they are simpler to generate and handle than fitting ...
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Source time reversal (STR) method for linear elasticity
Brevis, R.I.; Rodríguez-Rozas, A.; Ortega, J.H.; Pardo, D. (2018)
We study the problem of source reconstruction for a linear elasticity problem applied to seismicity induced by mining. We assume the source is written as a variable separable function $\mathbf{f(x)}\>g(t)$ . We first present ...
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Time-Domain Goal-Oriented Adaptivity Using Pseudo-Dual Error Representations
Muñoz-Matute, J.; Alberdi, E.; Pardo, D.; Calo, V.M. (2017-12)
Goal-oriented adaptive algorithms produce optimal grids to solve challenging engineering problems. Recently, a novel error representation using (unconventional) pseudo-dual problems for goal-oriented adaptivity in the ...
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Goal-oriented adaptivity using unconventional error representations for the multi-dimensional Helmholtz equation
Darrigrand, V.; Rodríguez-Rozas, A.; Muga, I.; Pardo, D.; Romkes, A.; Prudhomme, S. (2017-06-27)
In goal‐oriented adaptivity, the error in the quantity of interest is represented using the error functions of the direct and adjoint problems. This error representation is subsequently bounded above by element‐wise error ...
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Fast Simulation of 2.5D LWD Resistivity Tools
Rodríguez-Rozas, A.; Pardo, D.; Torres-Verdín, C. (2017-06)
As a first step towards the fast inversion of geophysical data, in this work we focus on the rapid simulations of 2.5D logging-while-drilling (LWD) borehole resistivity measurements. Given a commercial logging instrument ...
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Optimally refined isogeometric analysis
Garcia, D.; Barton, M.; Pardo, D. (2017-06)
Performance of direct solvers strongly depends upon the employed discretization method. In particular, it is possible to improve the performance of solving Isogeometric Analysis (IGA) discretizations by introducing multiple ...
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1.5D BASED INVERSION OF LOGGING-WHILE-DRILLING RESISTIVITY MEASUREMENTS IN 3D FORMATIONS
Pardo, D.; Torres-Verdín, C. (2017-06)
This manuscript describes an extension of a computer method developed for the fast inversion of logging-while-drilling (LWD) resistivity measurements Pardo and Torres-Verdín (2015); Bakr et al. (2016). The method enables ...
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Fusion-based variational image dehazing
Galdran, A.; Vazquez-Corral, J.; Pardo, D.; Bertalmio, M. (2017-02-01)
We propose a novel image-dehazing technique based on the minimization of two energy functionals and a fusion scheme to combine the output of both optimizations. The proposed fusion-based variational image-dehazing (FVID) ...
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A multi-domain decomposition-based Fourier finite element method for the simulation of 3D marine CSEM measurements
Bakr, S.A.; Pardo, D. (2017-01-01)
We introduce a multi-domain decomposition Fourier finite element (MDDFFE) method for the simulation of three-dimensional (3D) marine controlled source electromagnetic measurement (CSEM). The method combines a 2D finite ...
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A source time reversal method for seismicity induced by mining
Brevis, R.I.; Ortega, J.H.; Pardo, D. (2017-01-01)
In this work, we present a modified Time-Reversal Mirror (TRM) Method, called Source Time Reversal (STR), to find the spatial distribution of a seismic source induced by mining activity. This methodology is based on a known ...
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ICCS 2017 Workshop on Agent-Based Simulations, Adaptive Algorithms and Solvers
Byrski, A.; Paszynski, M.; Schaefer, R.; Calo, V.M.; Pardo, D. (2017)
This workshop seeks to integrate results from different domains of computer science, computational science, and mathematics. We welcome simulation papers, either hard simulations using finite element or finite difference ...
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Goal-Oriented p-Adaptivity using Unconventional Error Representations for a 1D Steady State Convection-Diffusion Problem
Pardo, D.; Darrigrand, V.; Rodríguez-Rozas, A.; Muga, I. (2017)
This work proposes the use of an alternative error representation for Goal-Oriented Adaptivity (GOA) in context of steady state convection dominated diffusion problems. It introduces an arbitrary operator for the computation ...
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A Quadrature-Free Method for Simulation and Inversion of 1.5D Direct Current (DC) Borehole Measurements
Rojas, S.; Muga, I.; Pardo, D. (2016-12)
Resistivity inverse problems are routinely solved in order to characterize hydrocarbon bearing formations. They often require a large number of forward problems simulations. When considering a one dimensional (1D) planarly ...
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Fast inversion of logging-while-drilling resistivity measurements acquired in multiple wells
Bakr, S.A.; Pardo, D.; Torres-Verdin, C. (2016-10)
This paper introduces a new method for the fast inversion of borehole resistivity measurements acquired in multiple wells using logging-while-drilling (LWD) instruments. There are two key novel contributions. First, we ...
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The value of continuity: Refined isogeometric analysis and fast direct solvers
Garcia, D.; Pardo, D.; Dalcin, L.; Paszynski, M.; Collier, N.; Calo, V.M. (2016-09-23)
We propose the use of highly continuous finite element spaces interconnected with low continuity hyperplanes to maximize the performance of direct solvers. Starting from a highly continuous Isogeometric Analysis (IGA) ...
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A multi-objective memetic inverse solver reinforced by local optimization methods
Gajda-Zagórska, E.; Schaefer, R.; Smolka, M.; Pardo, D.; Alvarez-Aramberri, J. (2016-09-01)
We propose a new memetic strategy that can solve the multi-physics, complex inverse problems, formulated as the multi-objective optimization ones, in which objectives are misfits between the measured and simulated states ...
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Dimensionally adaptive hp-finite element simulation and inversion of 2D magnetotelluric measurements
Alvarez-Aramberri, J.; Pardo, D. (2016-09-01)
Magnetotelluric (MT) problems often contain different subdomains where the conductivity of the media depends upon one, two, or three spatial variables. Traditionally, when a MT problem incorporates a three-dimensional (3D) ...
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Enhanced variational image dehazing
Galdran, A.; Vazquez-Corral, J.; Pardo, D.; Bertalmio, M. (2015-12-31)
Images obtained under adverse weather conditions, such as haze or fog, typically exhibit low contrast and faded colors, which may severely limit the visibility within the scene. Unveiling the image structure under the haze ...
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Goal-oriented adaptivity using unconventional error representations for the 1D Helmholtz equation
Darrigrand, V.; Pardo, D.; Muga, I. (2015-12-31)
In this work, the error of a given output functional is represented using bilinear forms that are different from those given by the adjoint problem. These representations can be employed to design novel h, p, and hp ...
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Fourier finite element modeling of light emission in waveguides: 2.5-dimensional FEM approach
Ou, Y.; Pardo, D.; Chen, Y. (2015-12-31)
We present a Fourier finite element modeling of light emission of dipolar emitters coupled to infinitely long waveguides. Due to the translational symmetry, the three-dimensional (3D) coupled waveguide-emitter system can ...
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Multi-objective hierarchic memetic solver for inverse parametric problems
Gajda-Zagórska, E.; Smolka, M.; Schaefer, R.; Pardo, D.; Alvarez-Aramberri, J. (2015-12-31)
We propose a multi-objective approach for solving challenging inverse parametric problems. The objectives are misfits for several physical descriptions of a phenomenon under consideration, whereas their domain is a common ...
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Quantities of interest for surface based resistivity geophysical measurements
Alvarez-Aramberri, J.; Bakr, S.A.; Pardo, D.; Barucq, H. (2015-12-31)
The objective of traditional goal-oriented strategies is to construct an optimal mesh that minimizes the problem size needed to achieve a user prescribed tolerance error for a given quantity of interest (QoI). Typical ...
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Semi-analytical response of acoustic logging measurements in frequency domain
Muga, I.; Pardo, D.; Matuszyk, P.J.; Torres-Verdin, C. (2015-12-31)
This work proposes a semi-analytical method for simulation of the acoustic response of multipole eccentered sources in a fluid-filled borehole. Assuming a geometry that is invariant with respect to the azimuthal and vertical ...
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Automatic Red-Channel underwater image restoration
Galdran, A.; Pardo, D.; Picón, A.; Alvarez-Gila, A. (2015-12-31)
Underwater images typically exhibit color distortion and low contrast as a result of the exponential decay that light suffers as it travels. Moreover, colors associated to different wavelengths have different attenuation ...
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High-accuracy adaptive modeling of the energy distribution of a meniscus-shaped cell culture in a Petri dish
Gomez-Revuelto, I.; Garcia-Castillo, L.E.; Pardo, D. (2015-12-31)
Cylindrical Petri dishes embedded in a rectangular waveguide and exposed to a polarized electromagnetic wave are often used to grow cell cultures. To guarantee the success of these cultures, it is necessary to enforce that ...
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A Secondary Field Based hp-Finite Element Method for the Simulation of Magnetotelluric Measurements
Alvarez-Aramberri, J.; Pardo, D.; Barucq, E. (2015-12-31)
In some geophysical problems, it is sometimes possible to divide the subsurface resistivity distribution as a one dimensional (1D) contribution plus some two dimensional (2D) inhomogeneities. Assuming this scenario, we ...
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Direct solvers performance on h-adapted grids
Paszynski, M.; Pardo, D.; Calo, V.M. (2015-12-31)
We analyse the performance of direct solvers when applied to a system of linear equations arising from an $h$-adapted, $C^0$ finite element space. Theoretical estimates are derived for typical $h$-refinement patterns arising ...
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Computational cost of isogeometric multi-frontal solvers on parallel distributed memory machines
Wozniak, M.; Paszynski, M.; Pardo, D.; Dalcin, L.; Calo, V.M. (2015-12-31)
This paper derives theoretical estimates of the computational cost for isogeometric multi-frontal direct solver executed on parallel distributed memory machines. We show theoretically that for the $C^{p-1}$ global continuity ...
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An Agent-Oriented Hierarchic Strategy for Solving Inverse Problems
Smolka, M.; Schaefer, R.; Paszynski, M.; Pardo, D.; Alvarez-Aramberri, J. (2015-12-31)
The paper discusses the complex, agent-oriented hierarchic memetic strategy (HMS) dedicated to solving inverse parametric problems. The strategy goes beyond the idea of two-phase global optimization algorithms. The global ...
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FAST AND AUTOMATIC INVERSION OF LWD RESISTIVITY MEASUREMENTS FOR PETROPHYSICAL INTERPRETATION
Pardo, D.; Torres-Verdín, C.; Ali Bakr, S. (2015-07)
This paper describes an extension of a recently developed fast inversion method (Pardo and Torres-VerdÍn (2015)) for estimating a layer-by-layer electric resistivity distribution from logging-whiledrilling (LWD) electromagnetic ...
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Unified modeling language description of the object-oriented multi-scale adaptive finite element method for step-and-flash imprint lithography simulations
Paszynski, M.; Gurgul, P.; Sieniek, M.; Pardo, D. (2014-12-31)
In the first part of the paper we present the multi-scale simulation of the Step-and-Flash Imprint Lithography (SFIL), a modern patterning process. The simulation utilizes the hp adaptive Finite Element Method (hp-FEM) ...
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Computational cost estimates for parallel shared memory isogeometric multi-frontal solvers
Wozniak, M.; Kuznik, K.; Paszynski, M.; Calo, V.M.; Pardo, D. (2014-12-31)
In this paper we present computational cost estimates for parallel shared memory isogeometric multi-frontal solvers. The estimates show that the ideal isogeometric shared memory parallel direct solver scales as $\mathcal{O}( ...
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Fast simulation of through-casing resistivity measurements using semi-analytical asymptotic models. Part 1: Accuracy study
Erdozain, A.; Peron, V.; Pardo, D. (2014-12-31)
When trying to obtain a better characterization of the Earth's subsurface, it is common to use borehole through-casing resistivity measurements. It is also common for the wells to be surrounded by a metal casing to protect ...
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A hybrid method for inversion of 3D DC resistivity logging measurements
Gajda-Zagórska, E.; Schaefer, R.; Smolka, M.; Paszynski, M.; Pardo, D. (2014-12-31)
This paper focuses on the application of hp hierarchic genetic strategy (hp-HGS) for solution of a challenging problem, the inversion of 3D direct current (DC) resistivity logging measurements. The problem under consideration ...
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Fast 1D Inversion of Logging-While-Drilling Resistivity Measurements for Improved Estimation of Formation Resistivity in High-Angle and Horizontal Wells
Pardo, D.; Torres-Verdín, C. (2014-12)
We have developed an efficient inversion method to estimate layer-by-layer electric resistivity from loggingwhile-drilling electromagnetic induction measurements. The method assumes a 1D model based on planarly layered ...
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3D hp-Adaptive Finite Element Simulations of Bend, Step, and Magic-T Electromagnetic Waveguide Structures
Gomez-Revuelto, I.; Garcia-Castillo, L.E.; Llorente-Romano, S.; Pardo, D. (2014-03)
Metallic rectangular waveguides are often the preferred choice on telecommunication systems and medical equipment working on the upper microwave and millimeter wave frequency bands due to the simplicity of its geometry, ...
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Sensitivity Analysis for the Appraisal of Hydrofractures in Horizontal Wells with Borehole Resistivity Measurements
Pardo, D.; Torres-Verdín, C. (2013-06)
This paper numerically evaluates the possibility of using borehole electromagnetic (EM) measurements to diagnose and quantify hydraulic fractures that have been arti ficially generated in a horizontal well. Hydrofractures ...
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Influence of borehole-eccentred tools on wireline and logging-while-drilling sonic logging measurements
Pardo, D.; Matuszyky, P.; Torres-Verdín, C.; Mora, A.; Muga, I. (2013-06)
We describe a numerical study to quantify the influence of tool-eccentricity on wireline and logging-while-drilling (LWD) sonic logging measurements. Simulations are performed with a hp-adaptive Fourier Finite-Element ...
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Modeling of bone conduction of sound in the human head using hp-finite elements: Code design and verification
Demkowicz, L.; Gatto, P.; Kurtz, J.; Paszynski, M.; Rachowicz, W.; Bleszyński, E.; Bleszyński, M.; Hamilton, M.; Champlin, C.; Pardo, D. (2011-12-31)
We focus on the development of a reliable numerical model for investigating the bone-conduction of sound in the human head. The main challenge of the problem is the lack of fundamental knowledge regarding the transmission ...
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Simulation of marine controlled source electromagnetic measurements using a parallel fourier hp-finite element method
Pardo, D.; Nam, M.J.; Torres-Verdin, C.; Hoversten, M.G.; Garay Iñ. (2011-12-31)
We introduce a new numerical method to simulate geophysical marine controlled source electromagnetic (CSEM) measurements for the case of 2D structures and finite 3D sources of electromagnetic (EM) excitation. The method ...
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Compensation effect analysis in DIE method for through-casing measuring formation resistivity
Qing, C.; Pardo, D.; Hong-bin, L.; Fu-rong, W. (2011-08)
The measuring technique based on Double-Injection-Electrodes (DIE) and its compensation arithmetic method have been proven to be very useful for eliminating the errors caused by electrode-scale mechanical tolerances in ...
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New post processing method for interpretation of through casing resistivity (TCR) measurements
Qing, C.; Pardo, D.; Hong-bin, L. (2011-03)
We propose a new iterative method for post processing through casing resistivity (TCR) measurements. This method can be seen as a correction or extension of Kaufman´s theory to more complex scenarios, in which the casing ...
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Arithmetic method of double-injection-electrode model for resistivity measurement through metal casing
Chen, Q.; Pardo, D.; Li, H.-B.; Wang, F.-R.; Ye, Q.-Z. (2010-12-31)
Through-casing resistivity (TCR) measurement instruments such as Cased Hole Formation Resistivity are extensively used for the dynamic monitoring of oil reservoirs during the production phase in oil wells to evaluate the ...
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Simulation of DC dual-laterolog measurements in complex formations: A Fourier-series approach with nonorthogonal coordinates and self-adapting finite elements
Nam, M.J.; Pardo, D.; Torres-Verdin, C. (2009-12-31)
Dual laterolog (DLL) makes use of a galvanic conduction principle to focus electrical currents into rock formations, thereby minimizing shoulder and borehole effects in the measurement of formation resistivity. The tool ...
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Performance of a multi-frontal parallel direct solver for hp-finite element method
Paszynski, M.; Pardo, D.; Torres-Verdin, C. (2009-12-31)
In this paper we present the performance of our parallel multi-frontal direct solver when applied to solve linear systems of equations resulting from discretizations of a hp Finite Element Method (hp-FEM). The hp-FEM ...
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Sensitivity study of borehole-to-surface and crosswell electromagnetic measurements acquired with energized steel casing to water displacement in hydrocarbon-bearing layers
Pardo, D.; Torres-Verdin, C.; Zhang, Z. (2008-12-31)
We study the theoretical response of electromagnetically energized steel casing in the presence of subsurface variations of electrical resistivity. Casing is energized with a finite-size solenoid antenna located along the ...
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Energy-norm-based and goal-oriented automatic hp adaptivity for electromagnetics: Application to waveguide Discontinuities
Garcia-Castillo, L.E.; Pardo, D.; Demkowicz, L. (2008-12-31)
The finite-element method (FEM) enables the use of adapted meshes. The simultaneous combination of h (local variations in element size) and p (local variations in the polynomial order of approximation) refinements, i.e., ...
| Date | Title | Place | Author/s | Type | |||
|---|---|---|---|---|---|---|---|
| 2010-01-30 | Simulation of Logging Measurements using hp-Finite Elements |
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D. Pardo, P. Matuszyk, M.J. Nam, C. Torres-Verdín, V. M. Calo, | Presentations | |||
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2009-12-10 |
Simulation of Sonic and Resistivity Logging Measurements Using hp-Finite Elements | University of Barcelona, Spain | D. Pardo, M. Paszynski, P. Matuszyk, M.J. Nam, C. Torres-Verdín, | Presentations | |||
| 2009-10-13 | Simulation of eccentricity effects on short and normal logging measurements using a self-adaptive hp finite element method | 9th SEGJ International Symposium, Sapporo, Japan | M. J. Nam, S. Hwang, D. Pardo, K. G. Park, C. Lee, C. Torres-Verdín, |
Presentations | |||
| 2009-10-08 | Computational Challenges Associated to the Simulation of Sonic and Resistivity Logging Measurements Using hp-Finite Elements. | AGH University of Science and Technology, Krakow, Poland | D. Pardo, M. Paszynski, C. Torres-Verdín, | Presentations | |||
| 2009-09-08 | Parallel direct solvers for adaptive Finite Element and Finite Difference Method | Basque Center for Applied Mathematics, Bilbao, Spain | M. Paszynski, D. Pardo, L. Demkowicz, V.Calo, | Presentations | |||
| 2009-09-01 | A hp-Finite Element Method Applied to the Simulation of Electromagnetics and Acoustic/Elastic Borehole Logging Measurements | Partial Differential Equations, Optimal Design, and Numerics, Benasque, Spain | D. Pardo, P. Matuszyk, M. J. Nam, C. Torres-Verdin, V. Calo, | Presentations | |||
| 2009-08-21 | Parallel mutli-frontal node based solver for hp Finite Element Method | Institute for Computational Engineering and Science, UT Austin, TX, USA | M. Paszynski, D. Pardo, L. Demkowicz, V.Calo, | Presentations | |||
| 2009-08-20 | Computing with hp-Finite Elements | National Instruments, Austin, TX, USA | L. Demkowicz, D. Pardo, | Presentations | |||
| 2009-08-14 | Simulation of Tri-Axial Induction Measurements in the Presence of Tool Eccentricity Using a Fourier Series Expansion in a New Sytem of Coordinates and a Self-Adaptive hp-Finite Element Method | Joint Industry Research Consortium on Formation Evaluation (Ninth Annual Meeting), Austin, TX, USA | M. J. Nam, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2009-08-14 | 2D Finite Element Simulation of Sonic Measurements Acquired in the Presence of a Tool Mandrel | Joint Industry Research Consortium on Formation Evaluation (Ninth Annual Meeting), Austin, TX, USA | P. Matuszyk, L. Demowicz, D. Pardo, J. Ma, C. Torres-Verdin, | Presentations | |||
| 2009-07-24 | Simulación de Herramientas de Prospección Petrolífera Basadas en el Electromagnetismo Utilizando un Método de Elementos Finitos | First Joint Congress of RSME-SMM, Oaxaca, Mexico | D. Pardo, M. J. Nam, C. Torres-Verdín, V. Calo, | Presentations | |||
| 2009-07-24 |
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First Joint Congress of RSME-SMM, Oaxaca, Mexico |
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Presentations | |||
| 2009-07-17 | A Fourier-Finite-Element Method in a Non-Orthogoal System of Coordinates for the Simulation of 3D Resistivity Logging Measurements Acquired in Deviated Wells | U.S. National Congress on Computational Mechanics 10, Columbus, OH, USA | D. Pardo, M. J. Nam, C. Torres-Verdín, V. M. Calo, | Presentations | |||
| 2009-06-11 | Parallel Goal-Oriented Adaptivity for a Fourier Finite Element Method. Applications to the Oil-Industry, | Mathematics of Finite Elements and its Applications (MAFELAP 2009) | D. Pardo, M. J. Nam, C. Torres-Verdín, J. Kurtz, | Presentations | |||
| 2009-05-27 | A hp Fourier-Finite-Element Framework with Multiphysics Applications | International Conference on Adaptive Modeling and Simulations (ADMOS 2009), Bruxelles, Belgium | D. Pardo, M. J. Nam, C. Torres-Verdin, | Presentations | |||
| 2009-05-11 | Multiphysics, Inversion, and Petroleum, | CIC bioGUNE | D. Pardo, | Presentations | |||
| 2009-05-06 | Simulation of Short and Normal Logging Measurements in the Presence of Tool Eccentricity Using Fourier Series Expansion in a New System of Coordinates and a Self-Adaptive hp-Finite Element Method, | Confrence of the Korean Society for Geosystems Engineering | M. J. Nam, S. Hwang, D. Pardo, K. G. Park, C. Lee, C. Torres-Verdin, | Presentations | |||
| 2009-05-06 | Goal-Oriented High-Order Self-Adaptive hp-Finite Element Simulation of Dual-Laterolog Measurements | Conference of the Korean Society for Geosystems Engineering | M. J. Nam, D. Pardo, C. Torres-Verdín, | Presentations | |||
| 2009-04-22 | Self-Adaptive hp-Finite Elemetn Simulation of Multi-Component Induction Measurements | Conference of the Korean Society of Economic and Environmental Geology | M. J. Nam, D. Pardo, C. Torres-Verdín, | Presentations | |||
| 2009-03-20 | A Framework for the Simulation of Multiphysics Problems Based on a hp Fourier-Finite-Element Method | CERFACS, Toulouse, France | D. Pardo, M. J. Nam, C. Torres-Verdín, | Presentations | |||
| 2009-02-12 | A Framework for the Simulation of Multiphysics Problems Based on a hp Fourier-Finite-Element Method | University of Pau, France | D. Pardo, M. J. Nam, C. Torres-Verdin, | Presentations | |||
| 2009-01-08 |
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Universidad del Pais Vasco, Leioa, Vizcaya, Spain | D. Pardo, M. J. Nam, C. Torres-Verdín, | Presentations | |||
| 2008-11-10 | Inversion of Resistivity and Multiphysics Measurements. Part I: Main Idea and Library Design | Basque Center for Applied Mathematics, Bilbao, Spain | D. Pardo, C. Torres-Verdín, M. J. Nam, V. M. Calo, | Presentations | |||
| 2008-10-23 | An hp Fourier Finite Element (FFE) Framework with Electromagnetics and Multiphysics Applications | VI Iberian Meeting on Computational Electromagnetism, Chiclana, Spain | D. Pardo, C. Torres-Verdin, L. E. García-Castillo, M. Paszynski, M. J. Nam, | Presentations | |||
| 2008-10-21 | Self-Adaptive hp-Finite Element Simulation of Multi-component Induction Measurements Acquired in Dipping, Invaded, and Anisotropic Formations | SiG Resistivity Meeting, Houston, TX, USA | M. J. Nam, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2008-10-03 | Multiphysics, Petroleum, and Inversion | Basque Center for Applied Mathematics, Bilbao, Spain | D. Pardo, | Presentations | |||
| 2008-09-08 | Self-Adaptive hp Finite-Element Simulation of Multi-Component Induction and DC/AC Dual- Laterolog Measurements Acquired in Dipping, Invaded, and Anisotropic Formations | Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, Korea | Myung Jin Nam, D. Pardo, C. Torres-Verdín, | Presentations | |||
| 2008-08-25 | Simulations of 2.5D Marine Controlled Source Electromagnetic Measurements (CSEM) Using hp-Finite Elements | Chevron, San Ramon, CA, USA | D. Pardo, C. Torres-Verdin, M.J. Nam, | Presentations | |||
| 2008-08-14 | Multi-Physics Inversion of Borehole Resistivity Measurements. Part I: Algorithms, Methods, and Library Design. | Joint Industry Research Consortium on Formation Evaluation (Eight Annual Meeting), Austin, TX, USA | D. Pardo, C. Torres-Verdin, M. J. Nam, V. M. Calo, | Presentations | |||
| 2008-08-13 | Software Update on Multi-Physics Simulation and Inversion of Borehole Measurements | Joint Industry Research Consortium on Formation Evaluation (Eight Annual Meeting), Austin, TX, USA | D. Pardo, C. Torres-Verdin, M. J. Nam, V. M. Calo, P.J. Matuszyk, | Presentations | |||
| 2008-08-13 | Software Update on Finite Element Simulation of DC/AC Resistivity Measurements | Joint Industry Research Consortium on Formation Evaluation (Eight Annual Meeting), Austin, TX, USA | D. Pardo, M.J. Nam, C. Torres-Verdin, | Presentations | |||
| 2008-08-11 | Self-Adaptive hp Finite-Element Simulation of AC/DC Dual Laterolog Measurements in Dipping, Invaded, and Anisotropic Formations | Joint Industry Research Consortium on Formation Evaluation (Eight Annual Meeting), Austin, TX, USA | M.J. Nam, D. Pardo, and C. Torres-Verdin, | Presentations | |||
| 2008-08-11 | Self-Adaptive hp Finite-Element Simulation of Multi-Component Induction Measurements Acquired in Dipping, Invaded, and Anisotropic Formations | Joint Industry Research Consortium on Formation Evaluation (Eight Annual Meeting), Austin, TX, USA | M.J. Nam, D. Pardo, and C. Torres-Verdin, | Presentations | |||
| 2008-07-02 | A Fourier-finite Element Formulation and an Iterative Solver for the Simulation of 3D Induction Measurements Acquired in Deviated Wells | PIERS 2008 in Cambridge, Boston, MA, USA | D. Pardo, M. J. Nam, C. Torres-Verdin, and M. Paszynski, | Presentations | |||
| 2008-07-02 | Design of Frequency-domain EM Finite Elements for Geophysical Applications | PIERS 2008 in Cambridge, Boston, MA, USA | D. Pardo, M. J. Nam, C. Torres-Verdin, and M. Paszynski, | Presentations | |||
| 2008-06-24 | New Developments for the Simulation of Galvanic and Induction Logging Measurements in Deviated Wells with Possibly Eccentered Tools | SiG Resistivity Meeting, Houston, TX, USA | D. Pardo, M. J. Nam, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 2008-05-26 | Parallel Goal-Oriented Fully Automatic hp Adaptive Finite Element Method Algorithm with Shared Data Structures | Advances in Structural Engineering and Mechanics (ASEM 2008), Jeju, Korea | M. Paszynski, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2008-02-29 | Simulation of 3D DC and AC Borehole Resistivity Measurements Using a Fourier Series Expansion in a Non-Orthogonal System of Coordinates | Poster Presentation at The University of Texas at Austin (SXSVD Golub's day), Austin, TX, USA | D. Pardo, M. J. Nam, C. Torres-Verdin, V. Calo, M. Paszynski, | Presentations | |||
| 2008-01-15 | Towards Accurate Simulations of AC Dual-Laterolog Measurements with Tool Eccentricity Using hp Finite Elements | Baker-Hughes, Houston, TX, USA | M. J. Nam, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2007-12-07 | Geophysical Simulations Using hp-Finite Elements | The University of Texas at Austin, Austin, TX, USA | D. Pardo, C. Torres-Verdin, M.J. Nam, M. Paszynski, L. Demkowicz, | Presentations | |||
| 2007-12-03 | Efficient Sequential and Parallel Solvers for the hp-Finite Element Method | APCOM07 in conjuction with EPMESC XI, Kyoto, Japan | M. Paszynski, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2007-09-26 | Numerical Simulation of 3D EM Borehole Measurements Using an hp-Adaptive Goal-Oriented Finite Element Formulation | SEG annual meeting, San Antonio, TX, USA | D. Pardo, M.J. Nam, C. Torres-Verdin, M. Paszynski, V.M. Calo, | Presentations | |||
| 2007-09-19 | Numerical Simulations of 3D DC and AC Resistivity Logging Measurements in Deviated Wells Using a Fourier Series Expansion in a Non-Orthogonal System of Coordinates | Schlumberger, Houston, TX, USA | D. Pardo, M.J. Nam, C. Torres-Verdin, M. Paszynski, V.M. Calo, | Presentations | |||
| 2007-09-04 | Simulaciones Numericas en la Industria del Petroleo Utilizando Elementos Finitos hp | Instituto Madrileño de Estudios Avanzados (IMDEA), Madrid, Spain | D. Pardo, M. Paszynski, C. Torres-Verdin, M. J. Nam, Ch. Michler, L. Demkowicz, | Presentations | |||
| 2007-09-04 | Three-Dimensional Oil-Industry Applications Using a Goal-Oriented hp-Finite Element Method | Stanislaw Staszic University of Science and Technology, Krakow, Poland | D. Pardo, M. Paszynski, C. Torres-Verdin, M. J. Nam, Ch. Michler, L. Demkowicz, | Presentations | |||
| 2007-08-27 | Numerical Simulations of 3D DC and AC Resistivity Logging Measurements Using a Fourier Series Expansion in a Non-Orthogonal System of Coordinates and a 2D hp-FEM | Baker-Hughes, Houston, TX, USA | D. Pardo, C. Torres-Verdin, M. J. Nam, M. Paszynski, V.M. Calo, | Presentations | |||
| 2007-08-27 | Self-Adaptive hp-Finite Element Simulation of Dual-Laterolog Measurements in Dipping, Invaded, and Anisotropic Formations | Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon, Korea | M. J. Nam, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 2007-08-17 | Fast Numerical Simulation of 3D DC/AC Borehole Resistivity Measurements with a Parallel hp-Adaptive and Goal-Oriented Finite Element Method | Joint Industry Research Consortium on Formation Evaluation (Seventh Annual Meeting), Austin, TX, USA | M. Paszynski, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 17-08-2007 | Self-Adaptive hp-Finite Element Simulation of Dual-Laterolog Measurements in Dipping, Invaded, and Anisotropic Formations | Joint Industry Research Consortium on Formation Evaluation (Seventh Annual Meeting), Austin, TX, USA | M. J. Nam, D. Pardo, C. Torres-Verdin | Presentations | |||
| 16-08-2007 | Software Update on Finite Element Simulation of DC/AC Borehole Resistivity Measurements | Joint Industry Research Consortium on Formation Evaluation (Seventh Annual Meeting), Austin, TX, USA | D. Pardo, C. Torres-Verdin, M.J. Nam, M. Paszynski | Presentations | |||
| 25-07-2007 | Simulations of Borehole Acoustic Measurements with Adaptive Finite Elements | U.S. National Congress on Computational Mechanics 9, San Francisco, CA, USA | C. Michler, L. Demkowicz, D. Pardo, C. Torres-Verdin | Presentations | |||
| 24-07-2007 | A Nested Dissection Parallel Direct Solver for Simulations of 3D DC/AC Resistivity Measurements | U.S. National Congress on Computational Mechanics 9, San Francisco, CA, USA | M. Paszynski, D. Pardo, C. Torres-Verdin | Presentations | |||
| 24-07-2007 | Numerical Simulations of 3D Borehole Resistivity Measurements Using a Fourier Series Expansion in a Non-Orthogonal System of Coordinates | U.S. National Congress on Computational Mechanics 9, San Francisco, CA, USA | D. Pardo, C. Torres-Verdin, M. J. Nam, V. M. Calo, M. Paszynski, | Presentations | |||
| 07-06-2007 | Fully Automatic hp-Adaptivity for Electromagnetics. Application to the Analysis of H-plane and E-plane Rectangular Waveguide Discontinuities | IEEE MTT-S International Microwave Symposium, Honolulu, Hawaii, USA | L.E. Garcia-Castillo, D. Pardo, L. Demkowicz, | Presentations | |||
| 03-03-2007 | Efficient simulation of borehole acoustic measurements using adaptive finite elements | Finite Element Rodeo, Houston, TX, USA | C. Michler, L. Demkowicz, C. Torres-Verdin, D. Pardo, J. Kurtz, | Presentations | |||
| 21-02-2007 | A Three-Dimensional Self-Adaptive, Goal-Oriented hp-Finite Element Method with a Multigrid Solver. Applications to Electromagnetics | SIAM Conference in Computational Science and Engineering, Costa Mesa, CA, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, M. Paszynski, | Presentations | |||
| 22-01-2007 | Efficient computation of acoustic sensing by means of adaptive finite elements | McGill University, Montreal, Canada | C. Michler, L. Demkowicz, C. Torres-Verdin, D. Pardo, J. Kurtz | Presentations | |||
| 15-01-2007 | Conversion of Meshes Between 2D and 3D hp Adaptive Parallel Finite Element Method Codes | XIV Conference Computer Methods in Material Science KomPlasTech 2007, Zakopane, Poland | M. Paszynski, D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 22-11-2006 | Efficient computation of acoustic sensing with hp-adaptive finite elements | Texas A&M University, College Station, TX, USA | C. Michler, L. Demkowicz, C. Torres-Verdin, D. Pardo, J. Kurtz, | Presentations | |||
| 15-11-2006 | A Two-Grid Goal-Oriented Iterative Solver for hp-FE Discretizations with Possibly Elongated Elements of Elliptic Problems | Eight IMACS International Symposium on Iterative Methods in Scientific Computation, College Station, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 20-09-2006 | Parallel hp-Finite Element Simulations of 3D Resistivity Logging Instruments | 13th ISPE International Conference on Concurrent Engineering, Antibes, France | M. Paszynski, D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 17-08-2006 | Numerical Simulations of 3D DC and AC Resistivity Logging Measurements in Deviated Wells Using a Fourier Series Expansion in a Non-Orthogonal System of Coordinates | Joint Industry Research Consortium on Formation Evaluation (Sixth Annual Meeting), Austin, TX, USA | D. Pardo, M. Paszynski, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 17-08-2006 | Parallel Numerical Simulation of 3D DC Borehole Resistivity Measurements Using an hp-Adaptive Goal-Oriented Finite Element Formulation | Joint Industry Research Consortium on Formation Evaluation (Sixth Annual Meeting), Austin, TX, USA | M. Paszynski, D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 16-08-2006 | 2D Simulations of Resistivity Logging Measurements (DEMO) | Joint Industry Research Consortium on Formation Evaluation (Sixth Annual Meeting), Austin, TX, USA | D. Pardo, | Presentations | |||
| 11-07-2006 | A 2D and 3D hp-Finite Element Method for Simulation of Through Casing Resistivity Logging Instruments (Poster Presentation) | 2006 IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, Albuquerque, NM, USA | D. Pardo, C. Torres-Verdin, M. Paszynski, C. Michler, L. Demkowicz, | Presentations | |||
| 08-07-2006 | Simulation of Surface-to-Borehole and Cross-Well EM Measurements Due to Energized Steel Casing. Part II. | Shell, Houston, TX, USA | D. Pardo, C. Torres-Verdin, W. Yang, | Presentations | |||
| 23-06-2006 | The Development of a 3D Self-Adaptive Goal-Oriented hp-Finite Element Software for Simulations of DC Resistivity Logging Instruments | Baker Hughes, Houston, TX, USA | D. Pardo, C. Torres-Verdin, W. Yang, | Presentations | |||
| 14-06-2006 | High Accuracy Simulations of 2D and 3D Resistivity Logging Instruments Using a Self-Adaptive Goal-Oriented hp-FEM | The Mathematics of Finite Elements and its Applications (MAFELAP) 2006, Brunel University, Uxbridge, United Kingdom | D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 05-05-2006 | 2D and 3D High Accuracy Simulations of Resistivity Logging Instruments Using A Self-Adaptive Goal-Oriented hp Finite Element Method | Department of Geophysics, Colorado School of Mines, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, C. Michler, | Presentations | |||
| 01-05-2006 | A Two-Dimensional Self-Adaptive hp Finite Element Method for the Analysis of Open Region Problems in Electromagnetics | 12th Biennial IEEE Conference on Electromagnetic Field Computation (IEEE CEFC2006), Miami, FL, USA | I. Gomez-Revuelto, L. E. Garcia-Castillo, D. Pardo, L. Demkowicz, | Presentations | |||
| 23-01-2006 | Simulation of Surface-to-Borehole and Cross-Well EM Measurements Due to Energized Steel Casing | Shell, Houston, TX, USA | D. Pardo, C. Torres-Verdin, W. Yang, L. Demkowicz, | Presentations | |||
| 13-12-2005 | The Development of a 3D Self-Adaptive Goal-Oriented hp-Finite Element Software for Simulations of Resistivity Logging Instruments. A Progress Report | Baker-Hughes, Houston, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, M. Paszynski, J. Kurtz, | Presentations | |||
| 18-11-2005 | The hp-Adaptive Finite Element Method: A Short Course. | Baker-Hughes, Novosibirsk, Russia | L. Demkowicz, D. Pardo, C. Torres-Verdin, | Presentations | |||
| 15-09-2005 | Adaptatividad Automatica hp en Electromagnetismo. Aplicacion al Analisis de Discontinuidades en Guia. | XX Simposio Nacional de Electromagnetismo (URSI 2005), Gandia, Spain | L.E. Garcia-Castillo, D. Pardo, L. Demkowicz, | Presentations | |||
| 08-09-2005 | High Accuracy Simulations of Resistivity Logging Instruments Using A Self-Adaptive Goal-Oriented hp Finite Element Method | International Conference on Adaptive Modeling and Simulations (ADMOS 2005), Barcelona, Spain | D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 17-08-2005 | Self-Adaptive Goal-Oriented hp-Finite Element Simulations of: (1) Axisymmetric Borehole Acoustics, and (2) 3D Resistivity Logging Instruments | Joint Industry Research Consortium on Formation Evaluation (Fifth Annual Meeting), Austin, TX, USA | D. Pardo, M. Paszynski, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 17-08-2005 | Self-Adaptive Goal-Oriented hp-Finite Element Simulations of Induction and Laterolog Measurements in the Presence of Steel Casing | Joint Industry Research Consortium on Formation Evaluation (Fifth Annual Meeting), Austin, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, L. Tabarovsky, | Presentations | |||
| 16-08-2005 | Automatic hp-Adaptivity. A Progress Report | Mini-Workshop: Convergence of Adaptive Algorithms, Oberwolfach, Germany | L. Demkowicz, J. Kurtz, D. Pardo, | Presentations | |||
| 28-07-2005 | Short Course on hp-Finite Elements: A Self-Adaptive Goal-Oriented hp Finite Element Method with Electromagnetic Applications | U.S. National Congress on Computational Mechanics 8, Austin, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 27-07-2005 | High Accuracy Simulations of Resistivity Logging Instruments Using A Self-Adaptive Goal-Oriented hp Finite Element Method | U.S. National Congress on Computational Mechanics 8, Austin, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 15-06-2005 | A Self-Adaptive Goal-Oriented hp-Finite Element Simulation of Resistivity Cross-Well Measurements with One Steel Cased Well | Shell, Houston, TX, USA | D. Pardo, Y. Wei, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 15-06-2005 | Simulation of Resistivity Logging Instruments with Mandrel Using a Self-Adaptive Goal-Oriented hp-Finite Element Method | Shell, Houston, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 02-06-2005 | Progress Report: One Year on a Development of A Self-Adaptive Goal-Oriented hp-Finite Element Strategy for Simulations of Resistivity Logging Instruments | Baker-Hughes, Houston, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, L. Tabarovsky, A. Bespalov, | Presentations | |||
| 05-05-2005 | Fully Automatic hp-Adaptive Finite Element Method. | Workshop on Multiscale Finite Element Methods, Austin, TX, USA | L. Demkowicz, D. Pardo, J. Kurtz, C. Torres-Verdin, | Presentations | |||
| 04-03-2005 | A Fully Automatic Goal-Oriented hp-Adaptive Finite Element Strategy for Simulations of Resistivity Logging Instruments | Finite Element Rodeo, Dallas, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, | Presentations | |||
| 22-02-2005 | Progress Report: A Fully Automatic Goal-Oriented hp-Adaptive Finite Element Strategy for Simulations of Resistivity Logging Instruments | Baker-Hughes, Houston, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, L. Tabarovsky, A. Bespalov, | Presentations | |||
| 12-12-2004 | Estrategia de Refinamientos hp 'Orientada a un Objetivo' para la Simulacion de Herramientas Electromagneticas en Pozos Petroliferos | Universidad Complutense de Madrid, Spain ; Universidad Carlos III de Madrid, Spain ; Universidad Autonoma de Madrid, Spain ; Universidad de Alcala de Henares, Madrid ; Universidad Politecnica de Valencia, Spain | D. Pardo, L.Demkowicz, C. Torres-Verdin, L. Tabarovsky, | Presentations | |||
| 27-10-2004 | A New Fully Automatic Goal-Oriented hp-Adaptive Finite Element Strategy for Simulations of Resistivity Logging Instruments | SiG Resistivity Meeting, Houston, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 26-10-2004 | A New Fully Automatic Goal-Oriented hp-Adaptive Finite Element Strategy for Simulations of Resistivity Logging Problems. Progress Report | Center for Subsurface Modeling Affiliates Meeting, Austin, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, A. Bespalov, | Presentations | |||
| 19-08-2004 | A New Fully Automatic Goal-Oriented hp-Adaptive Finite Element Strategy for Simulations of Resistivity Logging Instruments | Joint Industry Research Consortium on Formation Evaluation (Fourth Annual Meeting), Austin, TX, USA | D. Pardo, C. Torres-Verdin, L. Demkowicz, | Presentations | |||
| 27-07-2004 | A Fully Automatic Goal-Oriented hp-Adaptive Strategy with Applications to Electromagnetics. Part I: A DC Resistivity Logging Problem | Baker-Hughes, Houston, TX, USA | D. Pardo, L. Demkowicz, C. Torres-Verdin, L. Tabarovsky, | Presentations | |||
| 03-06-2004 | Estrategia de Refinamientos Automaticos hp Integrada con un Resolvedor de Dos Mallas: Aplicaciones al Electromagnetismo. | Universidad del Pais Vasco, Spain | D. Pardo, L. Demkowicz, | Presentations | |||
| 30-03-2004 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. Ph.D. Dissertation Defense | The University of Texas at Austin, USA | D. Pardo, | Presentations | |||
| 19-02-2004 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. Progress Report | Baker-Hughes, Houston, TX, USA | D. Pardo, L. Demkowicz, | Presentations | |||
| 18-01-2004 | Integration of a Fully Automatic hp-Adaptive Strategy with a Two Grid Solver: Applications to Electromagnetics. | VI Seminar in Computer Modeling and Microwave Engineering, Austin, TX, USA | D. Pardo, | Presentations | |||
| 08-01-2004 | Fully Automatic hp-Adaptive FEM for Maxwell's Equations in Three Dimensions | AFOSR Electromagnetic Workshop, San Antonio, TX, USA | L. Demkowicz, D. Pardo, | Presentations | |||
| 15-12-2003 | Estrategia de Refinamientos Automaticos hp Integrada con un Resolvedor de Dos Mallas: Aplicaciones al Electromagnetismo | III Encuentro Iberico de Electromagnetismo Computacional, Sedano, Burgos, Spain | D. Pardo, L. Demkowicz, | Presentations | |||
| 15-12-2003 | Estrategia de Refinamientos Automaticos hp Integrada con un Resolvedor de Dos Mallas: Aplicaciones al Electromagnetismo | Universidad Autonoma de Madrid, Spain ; Universidad Carlos III de Madrid, Spain ; Universidad Politecnica de Valencia, Spain | D. Pardo, L. Demkowicz, | Presentations | |||
| 12-11-2003 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. Progress Report. | Baker-Hughes, Houston, TX, USA | D. Pardo, | Presentations | |||
| 31-10-2003 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. Final Ph.D. Progress Report | The University of Texas at Austin, USA | D. Pardo, | Presentations | |||
| 09-09-2003 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics | US National Congress on Computational Mechanics 7, Albuquerque, NM, USA | D. Pardo, L. Demkowicz, | Presentations | |||
| 09-09-2003 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. | Adaptivity in Finite Element Analysis: Models, Meshes and Polynomial Order, Bad Honeff, Germany | D. Pardo, L. Demkowicz, | Presentations | |||
| 19-06-2003 | An hp-Adaptive Finite Element (FE) Method for Solving Electromagnetic (EM) Problems with Special Emphasis in Petroleum Engineering Applications | Baker-Hughes, Houston, TX, USA | D. Pardo, | Presentations | |||
| 12-06-2003 | Limitations of a Fully Automatic hp-Adaptive Strategy for the Finite Element (FE) Method | Baker-Hughes, Houston, TX, USA | D. Pardo, | Presentations | |||
| 22-05-2003 | Analysis of Edge Singularities Arising in Electromagnetic Computations | Baker-Hughes, Houston, TX, USA | D. Pardo, | Presentations | |||
| 13-01-2003 | Fully Automatic hp-Adaptive Simulations for Maxwell's Equations. | AFOSR Electromagnetic Workshop, San Antonio, TX, USA | L. Demkowicz, D. Pardo, | Presentations | |||
| 08-11-2002 | Integration of hp-Adaptivity with a Two Grid Solver: Applications to Electromagnetics. Ph.D. Project Proposal | The University of Texas at Austin, USA | D. Pardo, | Presentations | |||
| 14-03-2002 | A Two Grid Solver for a 2D Fully Automatic hp-Adaptive Finite Element Code. | FEM Rodeo, College Station, TX, USA | D. Pardo, L. Demkowicz, | Presentations | |||
| 08-01-2002 | Adaptive hp FE Modeling For Maxwell's Equations, A progress Report. | AFOSR Electromagnetics Workshop, San Antonio, TX, USA | L. Demkowicz, D. Pardo, | Presentations |