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Now showing items 101-200 of 737
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
Statens Vegvesen har fremmet bruk av en type rørbru kalt Submerged Floating Tube Bridge (STFB) som middel for å krysse fjorder. En slik er planlagt plassert i en fjord rett bak en forhøyning i fjordbunnen. Ved slike ...
(Master thesis / Masteroppgave, 2022)
In the optimal risk model, people usually are concerned about the dependent risks to explore how the optimal reinsurance contracts vary with the degree of dependence. In this thesis, we investigate this problem in bivariate ...
(Master thesis / Masteroppgave, 2022)
An artificial neural network (ANN) is a powerful machine learning method that is used in many modern big data applications such as facial recognition, machine translation and cancer diagnostics, to name a few. A common ...
Methods for battery state of health estimation - Comparative study of machine learning methods Restricted Access
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
Sequential Monte Carlo methods are often used for inference in state space models that are nonlinear and non-Gaussian. Inference about the latent variables of a state space model can be performed in an online setting by ...
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
We study the evolution of a three dimensional wave train subject to nonlinear modulation and damping. In particular, we are interested in gaining insight about the impact of nonlinear modulation and damping on the frequency ...
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
This Master's thesis addresses how to optimise market moving portfolio liquidation through a theoretical approach to liquidity cost optimisation with an exponential bounce-back model in discrete time. We use numerical ...
(Master thesis / Masteroppgave, 2022)
In this thesis we wish to explore and develop Solvency II-compliant computational tools that will provide arguments for the insurance company to employ internal models. Applying these tools we will replace some of the ...
Merton’s portfolio problem: A Monte Carlo study Restricted Access
(Master thesis / Masteroppgave, 2021)
A classical problem in continuous time finance is Merton’s portfolio problem. The problem was formulated and solved in 1969 by economist and Nobel prize winner Robert C. Merton. At each instant of time, a risk averse ...
(Master thesis / Masteroppgave, 2021)
In this thesis we consider a general stochastic interest rate under the HJM (Heath-Jarrow-Morton) framework. We further present a general model for the pricing of life insurance policies allowing for a wider range of ...
Supersingulære elliptiske kurver og kryptografi Restricted Access
(Master thesis / Masteroppgave, 2021)
Masteroppgaven handeler om den matematiske teorien bak Supersingular Isogeny Key Exchange, som er en post-kvante kryptografi. Vi går igjennom nøkkel resultatene innenfor supersingulære kurver, ekspansjons grafer og kvaternione ...
(Master thesis / Masteroppgave, 2021)
Modeling time series and systems that exhibit an evolution in time is of interest in several fields, and one class of models that can be used for modeling such systems is state space models. One of the most common tools ...
(Master thesis / Masteroppgave, 2021)
Denne oppgaven undersøker effekten av skip som beveger seg over en dybdeendring. Fenomenet blir illustrert ved beregninger av mini-tsunamien i Oslofjorden. Cruiseferger som beveger seg inn i en grunnere del av fjorden ...
(Master thesis / Masteroppgave, 2021)
The objective of this thesis has been the study of risk analysis and optimization under uncertainty. Theoretical aspects of several risk measures have been contemplated, and we have discussed their strengths and weaknesses. ...
(Master thesis / Masteroppgave, 2021)
Hyperbolic conservation laws are an important part in classical physics to be able to mathematically describe the actions of nature. To obtain approximate solutions of such problems, several numerical methods have been ...
(Master thesis / Masteroppgave, 2021)
In this thesis, we work with empirical likelihood functions and hybrid combinations of these with parametric likelihoods. We state and prove an analogue to Wilks theorem for the empirical likelihood function. In addition, ...
(Master thesis / Masteroppgave, 2021)
For electric propulsion motors installed on marine vessels, the prevention of overheating is usually based on resistor temperature detector sensors. The monitoring system raises an alarm if the detected temperatures reach ...
Mathematical reserves of unit-linked insurance policies with fractional volatility Restricted Access
(Master thesis / Masteroppgave, 2021)
We study models of mathematical reserves of unit-linked insurance policies with fractional volatility. Mathematical reserves are specified amounts of capital that an insurance company is legally obligated to allot to cover ...
(Master thesis / Masteroppgave, 2021)
With the advent of Industry 4.0, Predictive Maintenance (PdM) has garnered a lot of interest, both academically and in the industry. This thesis will be developing and using machine learning methods for PdM, using real ...
(Master thesis / Masteroppgave, 2021)
In regression problems, it is often of interest to assume that the relationship between a predictor variable and a response variable is monotone. In this thesis, we focus on general additive regression, in which each ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Background: Markov chain Monte Carlo (MCMC) methods for deep learning are not commonly used because of the computationally heavy Metropolis-Hastings (MH) test. MCMC methods can give more information in its predictions than ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
I nyere tid har det blitt gjennomført diverse studier på blodstrømning gjennom blodårer, hvor forskningen har blitt utført med et medisinsk perspektiv. I denne oppgaven blir også blodstrømning gjennom blodårer sett på, men ...
(Master thesis / Masteroppgave, 2021)
The lattice of honest degrees has been studied extensively since the 1960's. The introduction of the Growth Theorem in the 1990's would give more clarity to proofs of the already known results, and make new results easier ...
(Master thesis / Masteroppgave, 2021)
In statistical analysis of data we are interested in understanding or estimating certain aspects of the probability distribution generating the data. The aspects we are interested in does not always relate to all the ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Normalizing flows is a promising avenue in both density estimation and variational inference, which promises models that can both generate new samples and evaluate the exact density, both with reasonable computational ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
In this thesis we are exploring the application of count time series models to time series of battle deaths. A time series of battle deaths represents the number of people killed due to intrastate conflict and/or ...
(Master thesis / Masteroppgave, 2021)
Describing progression of a disease or the life history of an individual with multi-state models has been a topic of interest for many years. A challenge with these studies is that the data are often not continuously ...
(Master thesis / Masteroppgave, 2021)
Lasso is an optimization problem that is favored by both statisticians and data scientists, and algorithms for solving it is offered in most statistical computing and machine learning software. However, new research into ...
Accounting for Buyer Characteristics in Property Valuation Models Based on Norwegian Transaction Data Restricted Access
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
The aim of this thesis is to examine some of the symmetries of the Klein quartic curve by describing the fixed points of the subgroups of its automorphism group, and some orbits of fixed points on the quartic curve and on ...
Polyhedral combinatorics Restricted Access
(Master thesis / Masteroppgave, 2021)
Oppgaven tar for seg polyedrisk kombinatorikk, et tema der hovedmålet er å finne polyedriske representasjoner av kombinatoriske strukturer og optimeringsproblemer. Det er et rikt tema som kobler sammen områder som kombinatorikk ...
(Master thesis / Masteroppgave, 2021)
In this thesis, we present a class of parametric models based on a first-hitting time framework with Dirichlet processes for analyzing right-censored survival data. This model class has many advantages. First, parametric ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Fraud data often includes a dichotomous response variable with class imbalance, covariates with various marginal distributions and complex dependencies. Our goal is to predict the probability of fraud given the covariates. ...
(Master thesis / Masteroppgave, 2021)
Compressed sensing has roused great interest in research and many industries over the last few decades. This is because we can recover signals from vastly undersampled measurements, under certain assumptions: sparsity, ...
(Master thesis / Masteroppgave, 2021)
While neural networks have been demonstrated to be highly successful in mathematical and statistical modelling of a comprehensive selection of problems, their application to inverse problems is not without complications. ...
(Master thesis / Masteroppgave, 2021)
Deep Learning (DL) has already begun to find its way into the computational scientist's toolkit, yet the amount of material on numerical analysis of these techniques is somewhat lacking. In recent years, an instability ...
(Master thesis / Masteroppgave, 2021)
Hovedmålet for denne oppgaven er å undersøke og sammenlikne to symmetriske krypteringsalgoritmer, AES og Kalyna. I oppgaven presenteres AES og Kalynas funksjoner og sammenlikner AES og Kalynas forskjellige funksjoner i ...
(Master thesis / Masteroppgave, 2021)
Forsikringsselskaper rundt om i verden tilbyr mange ulike typer forsikringskontrakter. Disse skal gi erstatning dersom spesifikke hendelser som er spesifisert i kontraktene inntreffer. En type forsikring som er lite utbredt ...
(Master thesis / Masteroppgave, 2021)
Building upon recent work by Binda, Park, and Østvær we construct a theory of motives with compact support in the setting of logarithmic algebraic geometry. Starting from the notion of finite logarithmic correspondences ...
(Master thesis / Masteroppgave, 2021)
In this master's thesis we derive a connection between filtration shifts and differentials in a spectral sequence. We assume that the spectral sequence comes from a Cartan-Eilenberg system, and we develop a framework to ...
(Master thesis / Masteroppgave, 2021)
This master thesis reviews and discusses the literature on discrete choice methods. Discrete choice modelling is an effective tool for predicting choice behavior, analyzing consumer preferences, and determining consumption ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
In this master, we are going to generate period internal waves with two immiscible fluids and investigate the drift using PTV. The motivation is to compare to Weber and Christensen's theory on how spatial damping transfers ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
We study sequences of independent observations and test whether the observations stem from the same underlying probability distribution. We focus on being able to detect a potential sudden change in the parameters of the ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
The goal of this thesis is to introduce polynomial processes and to present some of the most important findings and applications in a clear and pedagogical way. A polynomial process is a particular type of Markov process. ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
This thesis is concerned with rationality questions of algebraic varieties, specifically questions regarding stable rationality over the complex numbers. We use the techniques related to the motivic volume introduced by ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Statistical boosting is a powerful tool that has become increasingly more popular in recent years. It works very well in the high-dimensional data setting, and it has many beneficial properties, e.g., shrinkage, automated ...
(Master thesis / Masteroppgave, 2020)
There is a hypothesis among epidemiologists that presence of bacteria in the blood, or bacteraemia, is a risk factor for serious health conditions such as cardiovascular disease. Combine this with the fact that cardiovascular ...
(Master thesis / Masteroppgave, 2020)
\textit{Isogeny graphs} are a type of graphs, where the vertices represent elliptic curves and the edges represent isogenies. I will examine some of the structures of these graphs in this thesis. It turns out that the ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Utgangspunktet var å bruke uføremodellering fra historisk data fra SpareBank 1 sitt livsforsikringsselskap og knytte dette til sosioøkonomiske forklaringsvariabler. Hovedmålet var å komme frem til en modell som kunne brukes ...
(Master thesis / Masteroppgave, 2020)
Hoftebrudd innebærer brudd i lårhalsen eller i området ved den lille og store lårbensknuten. Vi vet at 70% av individer med hoftebrudd er kvinner og også at 70% av disse individene er over 70 år. I denne oppgaven er vi ...
(Master thesis / Masteroppgave, 2020)
In nested case-control and case-cohort studies of time-to-events, covariate information is collected for all individuals in the sampled cohort. Often information on some of the covariates are easily available for the entire ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Detecting fraud is a problem characterized by class-imbalance. The events of interest, the true fraudulent cases, are outnumbered by the legitimate ones. Rare outcomes are hard to predict accurately, and standard classifiers, ...
(Master thesis / Masteroppgave, 2020)
Emnet for denne oppgaven er stokastiske kontrollproblemer, der formålet er å se på de økonomiske utfordringene ved irreversible investeringer i et fluktuerende marked. T.Ø. Kobila har tidligere utviklet en kontinuerlig ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Scalable Markov Chain Monte Carlo by subsampling methods Restricted Access
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Fairness is an inherently important aspect of decision-making in general, and with automated algorithms increasingly making decisions impacting our lives it is of paramount importance that the decisions they make be fair ...
(Master thesis / Masteroppgave, 2020)
Seifert manifolds play a crucial role in the classification of 3-manifolds, as they occupy six of the eight geometries proposed by Thurston. In this thesis we determine which Seifert manifolds can be given a smooth action ...
(Master thesis / Masteroppgave, 2020)
The main aim of the thesis is to study attractors for certain iterated function systems arising from quantum channels on finite dimensional C*-algebras. I will show the existence of attractors on the density operators by ...
(Master thesis / Masteroppgave, 2020)
Bølge responsen til en 2d elastisk plate har blitt mod- ellert som et flytende solcellepanel og studert under påvirkn- ing av periodiske overflate vannsbølger. Modellen anal- yseres med lineær bølge teori og hydrodynamikk. ...
(Master thesis / Masteroppgave, 2020)
The aim of this thesis is twofold. First we introduce a Hilbert-valued multi-market two-factor forward curve model satisfying the Heath-Jarrow-Morton equation. Each forward curve consist of a shared source of noise and a ...
(Master thesis / Masteroppgave, 2020)
Making the most of data in dairy farming research-how twenty-first century statistical learning methods can contribute Restricted Access
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Lately, there has been a lot of research on using deep learning as an alternative method to solve PDEs. The major benefit is being able to solve in higher dimensions without using a full grid of mesh points. Here we try ...
Option Pricing with Neural Networks Restricted Access
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
We show how both Poisson regression and recurrent events models can be used to model the number of claims to expect on a car insurance policy. We also show that the same is true when these models are extended to include a ...
(Master thesis / Masteroppgave, 2020)
The topic of this thesis is stochastic optimal control and reinforcement learning. Our aim is to unify the theory and language used in the two fields. The thesis presents both frameworks and discuss similarities, differences ...
(Master thesis / Masteroppgave, 2020)
Several examples of use of four importance measures for repairable multistate systems. The measures are based on the classical Birnbaum reliability importance measure, and can be characterised with respect to two features. ...
Can everything be learned? Recovery of highly sparse images using deep neural networks. Restricted Access
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
Over the past decade, compressive sensing and deep learning have emerged as viable techniques for reconstruction of images using far fewer samples than what Shannon's sampling theory dictates. The two methods are fundamentally ...
(Master thesis / Masteroppgave, 2019)
Recovering signals from undersampled measurements is a well-studied topic in mathematics. During the last decade, many attempts have been made to solve this problem using machine learning, with resulting reconstruction ...
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
Mekanismer for strømseparasjon og vertikalstrøm av partikler bak sterke indre bølger Restricted Access
(Master thesis / Masteroppgave, 2019)