Now showing items 66-85 of 274

  • A Fast Continuous Max-Flow Approach to Non-Convex Multilabeling Problems 

    Bae, Egil; Yuan, Jing; Tai, Xue-Cheng; Boykov, Yuri (The authors, 2011)
    This work addresses a class of multilabeling problems over a spatially continuous image domain, where the data fidelity term can be any bounded function, not necessarily convex. Two total variation based regularization terms ...
  • Fast Image Segmentation Using Variational Optimization Methods With Edge Detector 

    Stanislaus, Mary Gerina (The University of Bergen, 2014-06-02)
    In this work, we apply techniques in variational optimization to image segmentation. We study three different segmentation models: one is based on the active contour method, the second is based on a piecewise constant level ...
    Master thesis
  • Feasibility of simplified integral equation modeling of low-frequency marine CSEM with a resistive target 

    Bakr, Shaaban Ali; Mannseth, Trond (Society of Exploration Geophysicists, 2009)
    We have assessed the accuracy of a simplified integral equation (SIE) modeling approach for marine controlledsource electromagnetics (CSEM) with low applied frequencies and a resistive target. The most computationally ...
    Peer reviewedJournal article
  • Field-case simulation of CO2-plume migration using vertical-equilibrium models 

    Nilsen, Halvor Møll; Herrera, Paulo; Ashraf, Seyed Meisam; Ligaard, Ingeborg S.; Iding, Martin; Hermanrud, Christian; Lie, Knut-Andreas; Nordbotten, Jan Martin; Dahle, Helge K.; Keilegavlen, Eirik (Elsevier, 2011)
    When injected in deep saline aquifers, CO2 moves radially away from the injection well and progressively higher in the formation because of buoyancy forces. Analyzes have shown that after the injection period, CO2 will ...
    Journal article
  • Finite volume hydromechanical simulation in porous media 

    Nordbotten, Jan Martin (Wiley, 2014-05-27)
    Cell-centered finite volume methods are prevailing in numerical simulation of flow in porous media. However, due to the lack of cell-centered finite volume methods for mechanics, coupled flow and deformation is usually ...
    Journal article
  • Finite-Element Modelling of Buoyancy-Driven Flow in Natural Geothermal Systems 

    Saltnes, Marie Horn (The University of Bergen, 2010-05-27)
    Finite element modelling of buoyancy driven flow in geothermal systems is presented in this thesis. The main focus is on the development of a numerical modelling tool. The program developed is tested for classical benchmarks ...
    Master thesis
  • The Flow of Quasiconformal Mappings on S³ with Contact structure and a Family of Surfaces on the Heisenberg Group 

    Lavrichenko, Ksenia (The University of Bergen, 2011-05-31)
    Master thesis
  • GAMLSS-modeller i bilforsikring 

    Røyrane-Løtvedt, Hallvard (The University of Bergen, 2012-06-01)
    I denne oppgaven tester jeg ulike modeller for prediksjon av total skadeutbetaling fra forsikringsselskap til forsikringstaker i et poliseår. Modellene som testes hører til rammeverket Generalized Additive Models for ...
    Master thesis
  • Gasslekkasjar i Marine miljø 

    Aase, Stig Andre (The University of Bergen, 2012-06-19)
    I denne masteroppgåva studerast fluidstrøymingar gjennom marine sediment, og målet er å vurdere om ein enkel matematisk modell klarar å beskrive og bevare karakteristiske trekk for prosessen. Denne drøftinga vil baserast ...
    Master thesis
  • Generated Sound Waves in Corrugated Pipes 

    Lillejord, Arve (The University of Bergen, 2012-06-01)
    This paper studies sound waves generated in corrugated pipes by using computational fluid dynam- ics. The author did not have any prior experience in computational fluid dynamics and therefore a substantial part was ...
    Master thesis
  • Generating function and volume preserving mappings 

    Xue, Huiyan; Zanna, Antonella (The American Institute of Mathematical Sciences, 2014-03)
    In this paper, we study generating forms and generating functions for volume preserving mappings in Rn. We derive some parametric classes of volume preserving numerical schemes for divergence free vector fields. In passing, ...
    Peer reviewed
  • Genotyping errors in a calibrated DNA register: implications for identification of individuals 

    Haaland, Øystein; Glover, Kevin; Seliussen, Bjørghild Breistein; Skaug, Hans J. (BioMed Central, 2011-04-20)
    Background: The use of DNA methods for the identification and management of natural resources is gaining importance. In the future, it is likely that DNA registers will play an increasing role in this development. Microsatellite ...
    Peer reviewedJournal article
  • Geological Storage of CO2: Sensitivity and Risk Analysis 

    Ashraf, Meisam (The University of Bergen, 2014-04-10)
    Geological CO2 storage has the potential to be a key technology for prevention of industrial CO2 emission into the atmosphere. A successful storage operation requires safe geological structures with large storage capacity. ...
    Doctoral thesis
  • Global Minimization for Continuous Multiphase Partitioning Problems Using a Dual Approach 

    Bae, Egil; Yuan, Jing; Tai, Xue-Cheng (Springer Verlag, 2010)
    This paper is devoted to the optimization problem of continuous multi-partitioning, or multi-labeling, which is based on a convex relaxation of the continuous Potts model. In contrast to previous efforts, which are ...
    Peer reviewedJournal article
  • Gode rank 1 latticereglar av høg dimensjon 

    Topphol, Vegard (The University of Bergen, 2011-06-01)
    Oppgåva omhandlar numeriske integrasjonsreglar av trigonometrisk grad kalla latticereglar, med særskild fokus på å utvikle og teste algoritmer for å finne gode latticereglar av rank 1. For at teksten skal kunne stå ...
    Master thesis
  • Gonality of Points in Brill-Noether Loci of the Moduli Space of Curves 

    Sæbø, Gard (The University of Bergen, 2012-05-31)
    In this masterthesis we study the geometry of the points in the Brill-Noether locus. Typically, we want to study the gonality of points in this locus, that can be seen as projective curves. We also study what curves ...
    Master thesis
  • Good ethics or political and cultural censoring in science? 

    Torrissen, Ole; Glover, Kevin; Haug, tore; Misund, Ole Arve; Skaug, Hans J.; Kaiser, Matthias (2012)
    Peer-reviewed journals are the cornerstones to communicating scientific results. They play a crucial role in quality assurance through the review process, but they also create opportunities for discussions in the scientific ...
    Journal article
  • Hedging av rentederivat 

    Reisæter, Lars Aga (The University of Bergen, 2006-11)
    Master thesis
  • Hierarchical Bayesian Survival Analysis of Age-Specific Data From Birds' Nests 

    Willgohs, Niejing (The University of Bergen, 2010-11-19)
    In this thesis, I first present the grassland birds data from Wells(2007) which is used by several different methods of estimating the nest survival rates. The hierarchical Bayesian method from Cao(2009) then is introduced ...
    Master thesis
  • High order volume preserving integrators for three kinds of divergence-free vector fields via commutators 

    Xue, Huiyan (Huiyan Xue, 2013)
    In this paper, we focus on construction of high order volume preserving integrators for divergence-free vector fields of the monomial basis, exponential basis and tensor product of the monomial and exponential basis. We ...
    Journal article