Blar i Institutt for matematiske fag på tittel
Viser treff 81-100 av 2391
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A Semi-Discretized Method for Optimal Reparametrization of Curves
(Master thesis, 2019)I denne oppgaven utvikler vi en ny metode for optimal omparametrisering av kurver ved bruk av rothastighetstransformasjonen (the square root velocity transform). Metoden bruker dynamisk programmering, men med en bedre ... -
A Semi-Supervised Approach to the Application of Sensor-based ChangePoint Detection for Failure Prediction in Industrial Instruments
(Master thesis, 2019)I dette prosjektet analyserer vi muligheten til å anvende statistiske metoder for change-pointdeteksjon for å oppdage anomaliteter som forårsaker feil i industrielle instrumenter. I tillegg gir vi en oversikt over ulike ... -
A shared Parameter Model Accounting for Dropout Not at Random: A Case Study on Blood Pressure in the HUNT Study
(Master thesis, 2022)I dette arbeidet foreslår vi å tilpasse en felles parametermodell (SPM) i et Bayesianske rammeverket for å ta hensyn til manglende data på grunn av frafall i befolkningsbaserte helseundersøkelser. Vi bruker data fra helse ... -
A shared parameter model accounting for non-ignorable missing data due to dropout: Modelling of blood pressure based on the HUNT Study
(Master thesis, 2020)I denne oppgaven blir en delt-parameter-modell foreslått for å ta hensyn til ikke-tilfeldige manglende verdier (missing not at random, MNAR) i oppfølgingsstudier. Denne modellen er motivert av, og evaluert på, en stor ... -
A simple embedded discrete fracture-matrix model for a coupled flow and transport problem in prous media
(Journal article; Peer reviewed, 2018)Accurate simulation of fluid flow and transport in fractured porous media is a key challenge in subsurface reservoir engineering. Due to the high ratio between its length and width, fractures can be modeled as lower ... -
A Simulation Analysis of CO2 Capture and Underground Storage Monitoring in Smeaheia
(Chapter, 2019)The emissions of CO2 are an environmental problem and one possible solution is its capture and conduct underground storage (CSS). However, there is potential risk of leakage, and to aid in this challenge we propose to use ... -
A simulation of the development and screening of Cancer Mammae
(Master thesis, 2009)Based on the tumor growth model of Harald Weedon-Fekjær et al.'s paper "Breast cancer tumor growth estimated through mammography screening data", a simulation of breast cancer occurrence and tumor growth in a large population ... -
A Simulation-based Approach for Exploring the Degradation and Maintenance of a Single-unit System
(Master thesis, 2015)A model for degradation and maintenance of a single-item system is extensively studied in this thesis, using a simulation based approach. Stochastic processes are used as degradation models and the item is maintained ... -
A situation-specific solution to Freedman's paradox
(Bachelor thesis, 2021)Noen forskningsprosjekter baserer seg i stor grad på p-verdier for variabelvalg og rapportering av styrken på variablers relasjon til responsvariabelen. Det er vist at denne måten å utføre forklarende modellering fører til ... -
A spectral method for fractional porous medium equations
(Master thesis, 2015)This master's thesis considers the fractional general porous medium equation; a nonlocal equation with nonlinear diffusivity. Properties of the nonlocal operator are derived. Existence of distributional solutions are proved, ... -
A Spline-based Latent Variable Model for Neural State-space Discovery
(Master thesis, 2021)Nylige fremskritt innen opptak av nevrale data har gitt forskere muligheten til å betrakte store ansamlinger av nevroner, noe som motiverer bruken av dimensjonsreduksjonsmetoder som et verktøy for å oppdage skjulte variabler ... -
A State-Space Model for Abundance Estimation from Bottom Trawl Data with Applications to Norwegian Winter Survey
(Preprint series. Statistical Research Report;, Research report, 2015)We study a hierarchical dynamic state-space model for abundance estimation. A generic data fusion approach for combining computer simulated posterior samples of catch output data with observed re- search survey indices ... -
A Statistical Approach to Spatial Mapping of Temperature Change
(Master thesis, 2017)In this thesis, spatio-temporal temperature trends are estimated based on monthly average temperatures from 503 observation locations in the southern half of Norway. The time period studied is 1960 to 2016. A latent Gaussian ... -
A statistical framework for identifying neuroplasticity after stroke
(Master thesis, 2022)Hjernen er et fascinerende organ – milliarder av elektriske signaler mellom nevroner transporterer kontinuerlig informasjon. Ved å bruke funksjonell magnetresonansavbildning, også kalt fMRI, kan vi modellere disse prosessene. ... -
A statistical simulation-based framework for sample size considerations in case-control SNP association studies
(Master thesis, 2008)In the thesis, a statistical simulation-based framework is presented that is intended for making sample size and power considerations prior to case-control association studies. It reviews biological background and biallelic ... -
A step toward model selection in unsupervised clustering of animal behavior
(Master thesis, 2023)Dyrs bevegelsesmønster deles ofte inn i distinkte atferder, karakterisert av et sett kroppsbevegelser. Ved bruk av tidsfrekvensanalyse til å nyttegjøre informasjon om gjentakende bevegelsesmønstre, etterfulgt av ... -
A Step Towards a Reduced Order Modelling of Flow Characterized by Wakes Using Proper Orthogonal Decomposition
(Chapter; Peer reviewed, 2017)High fidelity simulations of flow might be quite demanding, because they involve up to O(106 – 109) degrees of freedom and several hours (or even days) of computational time, also on powerful hardware parallel architectures. ... -
A step towards reduced order modelling of flow characterized by wakes using Proper Orthogonal Decomposition
(Journal article; Peer reviewed, 2017)High fidelity simulations of flow can be quite demanding, involving up to O(106) to O(109) degrees of freedom, and several hours or days of computational time, even on powerful parllel architectures. These techniques become ... -
A Stochastic Model of Portfolio Returns Based on the Heath-Jarrow-Morton Framework
(Master thesis, 2021)Denne oppgaven foreslår en metode for stokastisk modellering av investeringsporteføljer bestående av aksjer og risikofrie nullkupongobligasjoner. Først brukes Heath-Jarrow-Morton-rammeverket til å modellere utviklingen til ... -
A Study and Comparison of First and Second Order Cellular Automata with Examples
(Master thesis, 2010)This thesis will give an introduction to the concepts of cellular automata and higher order cellular automata, and go through several examples of both. Cellular automata are discrete systems of cells in an n-dimensional ...