Sökning: "stochastic particle model"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden stochastic particle model.

  1. 1. Diffusion and Camera-Noise Modelling for Analysis of Single-Particle Tracking Movies

    Master-uppsats, Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Författare :Erik Clarkson; [2022]
    Nyckelord :reaction-diffusion; camera-noise modelling; single-particle tracking; Gillespie simulations; Physics and Astronomy;

    Sammanfattning : Interactions between T-cells and other body cells is an essential part of the immune system. It involves the binding between surface receptors of the two cells. Specifically, T-cell receptors (TCRs) bind onto pMHC (peptide-loaded major histocompatibility complex) molecules on the partnering cell surface. LÄS MER

  3. 2. Evaluation of a stochastic model of coherent turbulent structures for atmospheric particle deposition applications

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Andreas Eriksson; [2022]
    Nyckelord :atmospheric dispersion; particle deposition; k-epsilon; RANS; lagrangian particle model; stochastic particle model; OpenFOAM; SIMPLE algorithm; ABL; atmospheric boundary layer; neutral boundary layer; coherent turbulent structures;

    Sammanfattning : In this thesis, we have evaluated a stochastic Lagrangian model for computing particle deposition rates with prospects to use for atmospheric deposition applications.  The model is one-dimensional and models the particle dynamics in the boundary layers near walls and obstacles by simulating the coherent turbulent structures and Brownian motion governing the wall-normal transport. LÄS MER

  4. 3. Investigating Particle Cracking in Single- and Polycrystalline Nickel-Rich Cathodes using In Situ Impedance Spectroscopy

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi

    Författare :Mattias Sjödin; [2021]
    Nyckelord :Electrochemical surface area; particle cracking; NMC811; transmission-line model; equivalent-circuit fitting; commercial Li-ion batteries;

    Sammanfattning : State-of-the-art Li-ion cathode materials are based on LiMO2 (M=Ni, Mn, Co) layered transition metal oxides (denoted NMC) with Ni-rich composition because of their high specific capacity. Yet, these materials suffer from poor capacity retention due to crack formation during de-/lithiation cycling. LÄS MER

  5. 4. Estimating Risk Using Stochastic Volatility Models and Particle Stochastic Approximation Expectation Maximization

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Henrik Kragh; [2020]
    Nyckelord :Mathematics and Statistics;

    Sammanfattning : In this thesis several stochastic volatility models are presented and used to estimate the risk of a collection of Swedish stocks, as well as of a portfolio consisting of said stocks. Model parameters are estimated using the PSAEM algorithm. LÄS MER

  7. 5. Beräkningsmetoder för Molekylsimuleringar

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Viktor Sandström; [2019]
    Nyckelord :;

    Sammanfattning : Denna avhandling handlar om beräkningsmetoder för att utföra molekylsimuleringar på ett system av enkla partiklar. Genom att använda Lennard-Jones parpotential kan den attraktiva-repulsiva kraften som verkar på atomer och molekyler modelleras. LÄS MER