Sökning: "Diffusion"

Visar resultat 6 - 10 av 1406 uppsatser innehållade ordet Diffusion.

  1. 6. Estimating Diffusion Tensor Distributions With Neural Networks

    Master-uppsats, Linköpings universitet/Algebra, geometri och diskret matematik; Linköpings universitet/Tekniska fakulteten

    Författare :Rimaz Nismi; [2024]
    Nyckelord :Diffusion; Magnetic Resonance Imaging; MRI; Neural Networks; Optimal transport; Earth mover s distance; Sinkhorn distance;

    Sammanfattning : Magnetic Resonance Imaging (MRI) is an essential healthcare technology, with diffusion MRI being a specialized technique. Diffusion MRI exploits the inherent diffusion of water molecules within the human body to produce a high-resolution tissue image. An MRI image contains information about a 3D volume in space, composed of 3D units called voxels. LÄS MER

  3. 7. Solving the incompressible Navier-Stokes equations in 3-D to model gas flow in a room

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för beräkningsvetenskap

    Författare :Fredrik Malmström; [2024]
    Nyckelord :;

    Sammanfattning : The thesis proposes to model the flow of gases in a room by solving the incompressible Navier-Stokes equations in three dimensions. The transportationof scalars such as temperature and concentration of CO2 is modeled by solving the advection-diffusion equation, and the effects of temperature on thevelocity is accounted for by employing the Boussinesq approximation. LÄS MER

  4. 8. Matematiska modeller och datorberäkningar för ytdiffusion

    Kandidat-uppsats, Göteborgs universitet/Institutionen för matematiska vetenskaper

    Författare :Jessica El-jabaoui; Felicia Hägerström; Christian Jenei; [2023-11-28]
    Nyckelord :Ytdiffusion; Krökningsflöde; Modifierade Allen-Cahn ekvationen; Geometriska flöden; Fasfält.;

    Sammanfattning : I detta arbete undersöks geometriska flöden och hur dessa kan implementeras numeriskt med fasfältsmodeller. Speciellt ligger fokus på ytdiffusion, som är ett geometriskt flöde där ändliga ytor i andra dimensionen konvergerar mot en cirkel och arean bevaras. LÄS MER

  5. 9. Women's civil society organisations and the diffusion of the international climate-gender norm. A comparative qualitative study on the diffusion of the climate-gender nexus through implementation processes in Serbia and North Macedonia

    Master-uppsats, Göteborgs universitet/Statsvetenskapliga institutionen

    Författare :Martina Dahlby; [2023-10-30]
    Nyckelord :Climate-Gender Nexus; International Norm Diffusion; Women’s Civil Society Organisations; Gender Equality; Climate Change; Serbia; North Macedonia;

    Sammanfattning : The gendered issues of climate change have been acknowledged by the international community, which has led to the creation of policies addressing the climate-gender nexus. Through this international institutionalisation, the climate-gender nexus has become an international norm. LÄS MER

  7. 10. Improving echocardiogram view classification using diffusion models

    Master-uppsats, Göteborgs universitet/Institutionen för data- och informationsteknik

    Författare :Luis Arevalo; Anouka Ranby; [2023-10-23]
    Nyckelord :Computer; science; computer science; engineering; project; artificial intelligence; machine learning; deep neural networks; diffusion models; synthetic data; echocardiogram classification;

    Sammanfattning : In the field of medical science datasets are often highly imbalanced, where rare datapoints are of high importance. This study aims to explore the usage of synthetic datasets to improve the classification of echocardiogram views. LÄS MER