Blar i Department of Mathematics på emneord "VDP::Matematikk og Naturvitenskap: 400::Matematikk: 410"
Viser treff 21-40 av 41
-
Modeling and Simulation of Microbial Enhanced Oil Recovery: A New Approach which Includes the Role of Interfacial Area
(Master thesis, 2016-05-31)In today's world, oil remains the main source of energy. After discovering a petroleum reservoir, one can extract about 30% of the oil by using and maintaining the initial pressure in the reservoir through water ooding ... -
Modeling of Multi Phase Flow in Porous Media: Operator Splitting, Front Tracking, Interfacial Area and Network Models
(Doctoral thesis, 2001-12-20)In this work several new numerical methods and a new mathematical model related to multi phase flow in oil reservoirs have been developed, implemented and tested. The numerical difficulties in multi phase flow stem from ... -
A New Preconditioner for Iterative Phase Splitting Routines
(Master thesis, 2002)This thesis proposes a new, faster, non-iterative phase split estimate for multi component mixtures, and compares it with the previously published method of Wang and Stenby, in terms of their suitability as possible ... -
Om kvantilregresjon
(Master thesis, 2008)Vi skal i denne oppgaven beskrive teorien bak kvantilregresjon. I klassisk regresjonsanalyse bruker man minste kvadraters metode, hvor man beregner betingede gjennomsnittsestimater av forventningen til responsvariabelen. ... -
On Solving a Three Phase Flow Model with Capillary Forces
(Master thesis, 1998-07-10) -
Operator splitting methods for systems of convection-diffusion equations: nonlinear error mechanisms and correction strategies
(Peer reviewed; Journal article, 2001)Many numerical methods for systems of convection-diffusion equations are based upon an operator splitting formulation, where convective and diffusive forces are accounted for in separate substeps. We describe the nonlinear ... -
Oppfatningar og misoppfatningar i sannsyn: Ein mixed methods-studie av elevar på vidaregåande trinn – yrkesfagleg retning
(Master thesis, 2016-01)Denne masteroppgåva handlar om korleis elevar på vidaregåande trinn – yrkesfagleg retning forstår omgrep innafor sannsyn. Føremålet har vore å avdekkja kva oppfatningar og misoppfatningar elevane har og kva løysingsstrategiar ... -
Optimisation of Production From an Oil-Reservoir Using Augmented Lagrangian Methods
(Doctoral thesis, 2008-02-18)This work studies the use of augmented Lagrangian methods for water flooding production optimisation from an oil reservoir. Commonly, water flooding is used as a means to enhance oil recovery, and due to heterogeneous rock ... -
A pore network model for calculation of interfacial velocities
(Peer reviewed; Journal article, 2003)Two-phase flow in porous media is characterized by fluid-fluid interfaces that separate the fluid phases at the pore scale. These interfaces support pressure differences between phases, and their dynamics allow for saturation ... -
Renal Function Estimation using Magnetic Resonance Images
(Master thesis, 2009-06-02)This study is aimed at testing the use of Magnetic Resonance (MR) images and mathematical models for renal parameter estimation. The study was based on four models; the Patlak model, Cortical Compartment model, Separable ... -
Sequential Monte Carlo Methods for Bayesian Filtering
(Master thesis, 2008) -
Sequestration of Carbon in Saline Aquifers Mathematical and Numerical Analysis
(Doctoral thesis, 2004-04-30)The work in this thesis focuses equally on two main topics. The first of these subjects deals with development of criteria for monotonicity of con- trol volume methods. These methods are important and frequently used for ... -
Some New Approaches to Smoothing: Convolution Estimators in Regression Models and Backfitting in Panels of Time Series
(Doctoral thesis, 2005-11-18) -
Spectral evolution and probability distributions of surface ocean gravity waves and extreme waves
(Doctoral thesis, 2005-11-01) -
Stochastic chain-ladder models in nonlife insurance
(Master thesis, 2008)This thesis examines the stochastic models which reproduce chain-ladder estimates used in reserve estimation for nonlife insurance. The chain-ladder method provides no information regarding the variability of the outcome, ... -
A Streamline Front Tracking Method for Two- and Three-Phase Flow Including Capillary Forces
(Contemporary Mathematics; 295, Chapter, 2002) -
Streamline methods for parabolic differential equations.
(Master thesis, 2008)Parabolic advection-diffusion equations arise when modelling flow in porous media. We will in this thesis discuss two different problem set-ups from which these types of equations arise. - Groundwater contamination with ... -
Streamline Tracing on Irregular Grids
(Master thesis, 2003) -
Thickness and weak integrability & approximation and u-ideals
(Doctoral thesis, 2007-06-15) -
Total Variation Regularization of Matrix-Valued Images
(Peer reviewed; Journal article, 2007)We generalize the total variation restoration model, introduced by Rudin, Osher, and Fatemi in 1992, to matrix-valued data, in particular, to diffusion tensor images (DTIs). Our model is a natural extension of the color ...