Browsing Department of Mathematics by Title
Now showing items 28-47 of 982
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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 ... -
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 ... -
Applications of topological cyclic homology to algebraic K-theory
(Journal article; Peer reviewed, 2023) -
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 ... -
The aromatic bicomplex for the description of divergence-free aromatic forms and volume-preserving integrators
(Journal article; Peer reviewed, 2023)Aromatic B-series were introduced as an extension of standard Butcher-series for the study of volume-preserving integrators. It was proven with their help that the only volume-preserving B-series method is the exact flow ... -
Assessing Model Uncertainties Through Proper Experimental Design
(Peer reviewed; Journal article, 2013)This paper assesses how parameter uncertainties in the model for rise velocity of CO2 droplets in the ocean cause uncertainties in their rise and dissolution in marine waters. The parameter uncertainties in the rise velocity ... -
Assessing non-linearity in European temperature-sensitive tree-ring data
(Journal article; Peer reviewed, 2020-02)We test the application of parametric, non-parametric, and semi-parametric calibration models for reconstructing summer (June–August) temperature from a set of tree-ring width and density data on the same dendro samples ... -
Assessing uncertainty in knowledge-based systems for data analysis by simulation
(Statistical report no. 30, Research report, 1996-08) -
Assessment of Sequential and Simultaneous Ensemble-based History Matching Methods for Weakly Non-linear Problems
(Doctoral thesis, 2015-02-13)The ensemble Kalman filter (EnKF) has, since its introduction in 1994, gained much attention as a tool for sequential data assimilation in many scientific areas. In recent years, the EnKF has been utilized for estimating ...