Essays about: "inverse theory"

Showing result 1 - 5 of 34 essays containing the words inverse theory.

  1. 1. Diffusion MRI of Brain Tissue: Importance of Axonal Trajectory

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Kärnfysik

    Author : Jan Brabec; [2018]
    Keywords : dMRI; diffusion magnetic resonance; axonal trajectory; axonal geometry; undulations; modeling; axons; inverse problem; diffusion spectrum; time-dependent diffusion; Physics and Astronomy;

    Abstract : Obtaining microstructural information non-invasively on brain tissue remains a challenge. Diffusion magnetic resonance imaging (dMRI) is an imaging method that can provide such information. That includes geometrical considerations of nerve cells projections, axons, that are present in the white matter of the human brain. READ MORE

  2. 2. Income Inequality and Household Debt : A panel data study of 17 OECD-countries from 1995-2015

    University essay from Uppsala universitet/Nationalekonomiska institutionen; Uppsala universitet/Nationalekonomiska institutionen

    Author : Niclas Hvalgren; Linnea Englund Davidsson; [2018]
    Keywords : Household debt; Income inequality; Reference consumption; Relative income hypothesis of consumption; Panel data analysis; OECD; Advanced economies;

    Abstract : This study explores the relationship between income inequality and household indebtedness using panel data on 17 OECD-countries over the time period 1995-2015. Motivated by relative income theory of consumption and previous empirical research we anticipate a non-monotonic relationship between changes in household debt and income inequality (measured by the Gini- coefficient), as dynamics between different groups of households in the income spread is expected to vary at different levels of inequality. READ MORE

  3. 3. Ocean Waves Estimation : An Artificial Intelligence Approach

    University essay from Mälardalens högskola/Akademin för innovation, design och teknik

    Author : Andreas Ramberg; [2017]
    Keywords : Artificial Intelligence; Case-Based Reasoning; Encounter Angle; Encounter Spectrum; Feedforward Neural Network; Genetic Algorithm; Inverse Problem; Marine Vessels; Master Thesis; MATLAB; Model Parameter Estimation; Ocean Theory; Peak Period; Response Amplitude Operator; Ships; Significant Wave Height; Transfer Function; Wave Spectrum; Waves;

    Abstract : This thesis aims to solve the mathematical inverse problem of characterizing sea waves based on the responses obtained from a marine vessel sailing under certain sea conditions. By researching this problem the thesis contributes to the marine industry by improving products that are using ocean behavior for controlling ship's dynamics. READ MORE

  4. 4. An alternative approach for solving the problem of close to singular covariance matrices in modern portfolio theory

    University essay from Lunds universitet/Statistiska institutionen

    Author : Martin Claeson; [2017]
    Keywords : global minimum variance portfolio; singular covariance matrix; sector index portfolio; Business and Economics; Mathematics and Statistics;

    Abstract : In this thesis the effects of utilizing the sample covariance matrix in the estimation of the global minimum variance (GMV) portfolio are presented. When the number of assets, N, are close to the number of observations, T, the sample covariance matrix approaches singularity, leading to a lot of uncertainties in form of estimation error. READ MORE

  5. 5. Solving inverse problems in thermal engineering using a surrogate model

    University essay from KTH/Optimeringslära och systemteori

    Author : Sarra Fakhfakh; [2017]
    Keywords : ;

    Abstract : Through either measured or computed experimental data, inverse problems aim to determine parameters not straightforwardly given by measure. An inverse problem results in an optimization problem that requires many simulations of the direct problem which computations can be costly. One approach is to replace the reference model by a reduced model. READ MORE