Essays about: "diffusion index"

Showing result 1 - 5 of 15 essays containing the words diffusion index.

  1. 1. Image-driven simulation of brain tumors using a reaction-diffusion mathematical model

    University essay from Linköpings universitet/Avdelningen för medicinsk teknik

    Author : Kristos Qiqi; [2023]
    Keywords : brain tumor; cancer; mathematical model; simulation; magnetic resonance images; hjärntumör; cancer; matematisk model; simulering; magnetresonanstomografi bilder;

    Abstract : Brain tumors pose a big challenge in the field of neuro-oncology. Gliomas are the largest subgroup. Magnetic resonance imaging is a non-invasive tool for detecting and characterizing these tumors. Mathematical models, such as the reaction-diffusion equation, can be used for understanding the intricate behavior of gliomas. READ MORE

  3. 2. Improved Statistical Methods for Elliptic Stochastic Homogenization Problems : Application of Multi Level- and Multi Index Monte Carlo on Elliptic Stochastic Homogenization Problems

    University essay from Uppsala universitet/Tillämpad beräkningsvetenskap

    Author : Khalil Daloul; [2023]
    Keywords : Homogenization; Multilevel Monte Carlo; Multi-Index Monte Carlo; Monte Carlo; Multiscale methods;

    Abstract : In numerical multiscale methods, one relies on a coupling between macroscopic model and a microscopic model. The macroscopic model does not include the microscopic properties that the microscopic model offers and that are vital for the desired solution. READ MORE

  4. 3. MICRO-CLIMATE CHARACTERIZATION OF COMFORT MATERIALS : A CLIMATE ANALYSIS OF HIGH RESILIENCE FOAM IN MICRO-CLIMATE CONDITIONS

    University essay from Mälardalens universitet/Framtidens energi

    Author : Ullas Siddachary; [2022]
    Keywords : High resilience; high density; foam; operational energy; comfort; materials; temperature; heat index; vapor pressure; humidity; PCR coating;

    Abstract : Currently, it is widely recognised that the operational energy consumption of most building types currently outweighs their embodied energy by some margin. However, as we make dramatic increases in energy efficiency the embodied energy of the materials and components that we use will become proportionally larger and may account for a substantial proportion of the energy associated with buildings in the future. READ MORE

  5. 4. Transient Flow Simulations in Exhaust After Treatment Systems

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : John Walder; [2020]
    Keywords : Computational Fluid Dynamics; exhaust after treatment system; ammonia mixing;

    Abstract : The exhaust after treatment system is responsible for removing particulates and contaminants from the exhaust gases. The flow entering the SCR, a catalyst utilizing ammonia to reduce NOx emissions, was studied. The quality and distribution of flow entering the SCR plays an important role in the efficiency of the systems. READ MORE

  6. 5. Option pricing models: A comparison between models with constant and stochastic volatilities as well as discontinuity jumps

    University essay from Umeå universitet/Institutionen för matematik och matematisk statistik

    Author : Carl Paulin; Maja Lindström; [2020]
    Keywords : Financial mathematics; option pricing; calibration; options; parameter calibration; Black Scholes Merton model; Heston model; Bates model; Merton jump diffusion model; Black Scholes;

    Abstract : The purpose of this thesis is to compare option pricing models. We have investigated the constant volatility models Black-Scholes-Merton (BSM) and Merton’s Jump Diffusion (MJD) as well as the stochastic volatility models Heston and Bates. READ MORE