121 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- King Abdullah University of Science and TechnologySA5 papers
- University of BergenNO2 papers
- University of OsloNO2 papers
- Centre National de la Recherche ScientifiqueFR1 paper
- Institut für Regionale Innovation und SozialforschungDE1 paper
- Jožef Stefan InstituteSI1 paper
- ParisTechFR1 paper
- Université de StrasbourgFR1 paper
- Université Paris Sciences et LettresFR1 paper
- University of FreiburgDE1 paper
- University of LjubljanaSI1 paper
- University of StuttgartDE1 paper
14 papers
Python Framework for HP Adaptive Discontinuous Galerkin Method for Two Phase Flow in Porous Media
Andreas Dedner, Birane Kane, Robert Klöfkorn +1
In this paper we present a framework for solving two phase flow problems in porous media. The discretization is based on a Discontinuous Galerkin method and includes local grid ada…
Delay-robust control design for two heterodirectional linear coupled hyperbolic PDEs
Jean Auriol, Jakob Ulf, Philippe Martin +1
We detail in this article the necessity of a change of paradigm for the delay-robust control of systems composed of two linear first order hyperbolic equations. One must go back to…
Efficient big data assimilation through sparse representation: A 3D benchmark case study in seismic history matching
Xiaodong Luo, Tuhin Bhakta, Morten Jakobsen +1
In a previous work \citep{luo2016sparse2d_spej}, the authors proposed an ensemble-based 4D seismic history matching (SHM) framework, which has some relatively new ingredients, in t…
An Ensemble 4D Seismic History Matching Framework with Sparse Representation Based on Wavelet Multiresolution Analysis
Xiaodong Luo, Tuhin Bhakta, Morten Jakobsen +1
In this work we propose an ensemble 4D seismic history matching framework for reservoir characterization. Compared to similar existing frameworks in reservoir engineering community…
Iterative ensemble smoother as an approximate solution to a regularized minimum-average-cost problem: theory and applications
Xiaodong Luo, Andreas S. Stordal, Rolf J. Lorentzen +1
The focus of this work is on an alternative implementation of the iterative ensemble smoother (iES). We show that iteration formulae similar to those used in \cite{chen2013-levenbe…
Ensemble Kalman filtering with a divided state-space strategy for coupled data assimilation problems
Xiaodong Luo, Ibrahim Hoteit
This study considers the data assimilation problem in coupled systems, which consists of two components (sub-systems) interacting with each other through certain coupling terms. A…
Ensemble Kalman filtering with residual nudging: an extension to state estimation problems with nonlinear observation operators
Xiaodong Luo, Ibrahim Hoteit
The ensemble Kalman filter (EnKF) is an efficient algorithm for many data assimilation problems. In certain circumstances, however, divergence of the EnKF might be spotted. In prev…
Toward an enhanced Bayesian estimation framework for multiphase flow soft-sensing
Xiaodong Luo, Rolf J. Lorentzen, Andreas S. Stordal +1
In this work the authors study the multiphase flow soft-sensing problem based on a previously established framework. There are three functional modules in this framework, namely, a…
Covariance inflation in the ensemble Kalman filter: a residual nudging perspective and some implications
Xiaodong Luo, Ibrahim Hoteit
This note examines the influence of covariance inflation on the distance between the measured observation and the simulated (or predicted) observation with respect to the state est…
Efficient particle filtering through residual nudging
Xiaodong Luo, Ibrahim Hoteit
We introduce an auxiliary technique, called residual nudging, to the particle filter to enhance its performance in cases that it performs poorly. The main idea of residual nudging…
Ensemble Kalman filtering with residual nudging
Xiaodong Luo, Ibrahim Hoteit
Covariance inflation and localization are two important techniques that are used to improve the performance of the ensemble Kalman filter (EnKF) by (in effect) adjusting the sample…
Family-Vicsek scaling of detachment fronts in Granular Rayleigh Taylor Instabilities during sedimenting granular/fluid flows
Jan Ludvig Vinningland, Renaud Toussaint, Michael Niebling +2
When submillimetric particles are confined in a fluid such that a compact cluster of particles lie above the clear fluid, particles will detach from the lower boundary of the clust…
Non-factorizable contributions to
J. O. Eeg, S. Fajfer, A. Hiorth +1
It is pointed out that decays of the type have no factorizable contributions, unless at least one of the charmed mesons in the final state is a vector meson. The…
An error estimate for viscous approximate solutions of degenerate parabolic equations
Steinar Evje, Kenneth H. Karlsen
Relying on recent advances in the theory of entropy solutions for nonlinear (strongly) degenerate parabolic equations, we present a direct proof of an L^1 error estimate for viscou…