Sökning: "Ellipsoid process"

Hittade 5 avhandlingar innehållade orden Ellipsoid process.

  1. 1. Selected Topics in Continuum Percolation : Phase Transitions, Cover Times and Random Fractals

    Författare :Filipe Mussini; Erik I. Broman; Hermine Biermé; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Poisson point process; Percolation; Boolean model; Quasi-isometries; Cover times; Poisson cylinder process; Ellipsoid process; Phase transition; Random fractals; Mathematics; Matematik;

    Sammanfattning : This thesis consists of an introduction and three research papers. The subject is probability theory and in particular concerns the topics of percolation, cover times and random fractals.Paper I deals with the Poisson Boolean model in locally compact Polish metric spaces. LÄS MER

  3. 2. Geometrical and percolative properties of spatially correlated models

    Författare :Olof Elias; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; continuum percolation; brownian excursions; brownian interlacements; poisson cylinder model; fractal percolation;

    Sammanfattning : This thesis consists of four papers dealing with phase transitions in various models of continuum percolation. These models exhibit complicated dependencies and are generated by different Poisson processes. For each such process there is a parameter, known as the intensity, governing its behavior. LÄS MER

  4. 3. Optimisation in strategies in diffusion tensor MR imaging

    Författare :Stefan Skare; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Diffusion tensor; magnetic resonance imaging; optimisation; artefacts;

    Sammanfattning : With diffusion MR imaging, the Brownian motion (or self-diffusion) of water molecules is measured. In the corresponding ADC (Apparent Diffusion Coefficient) image, each image element (voxel) represents the average diffusion. In MRI, the diffusion is measured with diffusion gradients along certain directions in space. LÄS MER

  5. 4. Numerical Modelling of Self-Compacting Concrete Flow : Discrete and Continuous Approach

    Författare :Annika Gram; Johan Silfwerbrand; Ali Farhang; Mette R. Geiker; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SCC; rheology; Simulation of Flow; Simulering; Flöde; Självkompakterande Betong; Reologi; Construction materials; Konstruktionsmaterial;

    Sammanfattning : With the advent of Self-Compacting Concrete (SCC) that flows freely, under the soleinfluence of gravity, the wish for hassle-free and predictable castings even in complexcases, spurged the simulation of concrete flow as a means to model and predictconcrete workability. To achieve complete and reliable form filling with smoothsurfaces of the concrete, the reinforced formwork geometry must be compatible withthe rheology of the fresh SCC. LÄS MER

  7. 5. Integrating Latent Heat Storage into Residential Heating Systems : A study from material and component characterization to system analysis

    Författare :Tianhao Xu; Samer Sawalha; Björn Palm; Justin NingWei Chiu; Tianshu GE; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase change material; thermal energy storage; heat pump; load shifting; space heating; Energy Technology; Energiteknik;

    Sammanfattning : Latent heat thermal energy storage (LHTES) systems can be coupled with heat pump (HP) systems to realize heat load shifting on demand side. With phase change material (PCM), well designed LHTES components exhibit high storage energy density and thus have large potentials to be integrated in residence where a compact energy storage solution is needed. LÄS MER