Blar i Department of Mathematics på tittel
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Analysis of AMR and Other Mesh-Refinement Techniques for Inviscid Fluid Problems
(Master thesis, 2021-06-01) -
Analysis of Control Volume Heterogeneous Multiscale Methods for Single Phase Flow in Porous Media
(Peer reviewed; Journal article, 2014)The standard approximation for the flow-pressure relationship in porous media is Darcy's law that was originally derived for infiltration of water in fine homogeneous sands. Ever since there have been numerous attempts to ... -
Analysis of left truncated data with an application to insurance data
(Master thesis, 2009-06-02)This thesis discusses different ways of analysing left truncated data when the lower bound itself is a stochastic variable. We will consider the possible dependence between the variable of interest and the truncating ... -
Analysis of multi-beam sonar echos of herring schools by means of simulation
(Doctoral thesis, 2013-05-31)The synchronized behavior of large schools of fish can be a fascinating sight and has caught the attention of researchers for decades. Schools of thousands, or even millions of fish can seemingly function as a single entity, ... -
Analysis of non-linear shallow water equations discretized on Arakawa C-grids
(Master thesis, 2016-06-01)To model the behaviour of flow and waves in three dimensions, one may use the Navier-Stokes equations. These equations leads to the shallow water equations, when the depth is much smaller than the wavelength. The shallow ... -
Analysis of the Numerical Solutions of the Elder Problem Using Big Data and Machine Learning
(Journal article; Peer reviewed, 2023-03-20)In this study, the numerical solutions to the Elder problem are analyzed using Big Data technologies and data-driven approaches. The steady-state solutions to the Elder problem are investigated with regard to Rayleigh ... -
Analysis of the probability of default in peer-to-peer lending. Application of different classification techniques.
(Master thesis, 2018-12-22)In this thesis, peer-to-peer lending is explored and analyzed with the objective of fitting a model to accurately predict if borrowers default on their loans or not. The foundation for the thesis is a dataset from LendingClub, ... -
Analytical Methods for Upscaling of Fractured Geological Reservoirs
(Doctoral thesis, 2015-10-16)Numerical simulations have become an essential tool for planning well operations in the subsurface, whether the application is petroleum production, geothermal energy, groundwater utilization or waste disposal and leakage. ... -
Analytical solutions for aquifer thermal energy storage
(Peer reviewed; Journal article, 2017-02)The concept of aquifer thermal energy storage involves injection of water at elevated temperature, and possibly nonambient salinity, into a host aquifer. We consider axisymmetric injection, wherein both the composition and ... -
Analytical, combinatorial and topological properties of quadratic differentials and their applications
(Doctoral thesis, 2017-12-13)Quadratic differentials first appeared in 1930s in works of Teichmuller in connection with moduli problem for Riemann surfaces. Later it was revealed that quadratic differ- entials and their trajectories give solutions to ... -
APARCH Models Estimated by Support Vector Regression
(Master thesis, 2021-06-01)This thesis presents a comprehensive study of asymmetric power autoregressive conditional heteroschedasticity (APARCH) models for modelling volatility in financial return data. The goal is to estimate and forecast volatility ... -
Application of Hilbert-Huang Transform in Bearing Fault Detection
(Master thesis, 2020-03-21) -
Application of the Galerkin’s method on the problem of cellular convection induced by surface tension gradients.
(Department of Applied Mathematics report, Research report, 1971-11) -
Application of Vertically-Integrated Models with Subscale Vertical Dynamics to Field Sites for CO2 Sequestration
(Peer reviewed; Journal article, 2014)To address the engineering questions on security issues of geological carbon sequestration (GCS), a broad range of computational models with different levels of complexity have been developed - from multiphase multicomponent ... -
Application of Wavenet to financial times series prediction
(Master thesis, 2024-02-15)This thesis explores the application of the WaveNet model utilizing dilated causal convolutions, originally designed for text-to-speech synthesis on univariate time series. Here it is adapted to predicting on multivariate ... -
An Approach for Investigation of Geochemical Rock-Fluid Interactions
(Chapter, 2014)Geochemistry has a substantial impact in exploiting of geothermal systems. When water is injected in a geothermal reservoir, the injected water and in-situ brine have different temperatures and chemical compositions and ... -
An approximate hybrid method for modeling of electromagnetic scattering from an underground target
(Doctoral thesis, 2010-12-09)The detection of a potential petroleum reservoir is achieved through inversion of electromagnetic data acquired in sea floor receivers. Inversion of electromagnetic data requires a number of repeated solves of the ... -
Are Central Bankers Inflation Nutters? An MCMC Estimator of the Long-Memory Parameter in a State Space Model
(Journal article; Peer reviewed, 2019)Inflation targeting is a common monetary policy regime. Inflation targets are often flexible in the sense that the central bank allows inflation to temporarily deviate from the target to avoid causing unnecessary volatility ... -
Area rearrangement operator in discrete and continuous calculus
(Master thesis, 2024-06-03)By interpreting sums as area we construct the area rearrangement operator which looks like Φ = −x d/dx in the continuous case and φ = −x∆ in the discrete case. We explore the properties of these operators, among them how ...