Browsing Institutt for matematiske fag by Issue Date
Now showing items 1-20 of 2581
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Reliability testing based on deterioration measurements
(Dr.ingeniøravhandling, 0809-103X; 1988:32, Doctoral thesis, 1988)In traditional reliability life testing and accelerated life testing, usally only the failure mode and the lifetime upon failure or censoring, are recorded. The information obtained from such testing may be signicantly ... -
Grunnkurs i statistikk og sannsynlighetsteori
(Book, 1997) -
Stochastic Modeling and Statistical Inference of Geological Fault Populations and Patterns
(Dr. ingeniøravhandling, 0809-103X; 2000:51, Doctoral thesis, 2000)The focus of this work is on faults, and the main issue is statistical analysis and stochastic modeling of faults and fault patterns in petroleum reservoirs. The thesis consists of Part I-V and Appendix A-C. The units can ... -
Fault controlled pressure modelling in sedimentary basins /
(Dr. ingeniøravhandling, 0809-103X; 2000:22, Doctoral thesis, 2000)The starting point for this Dr. Ing. thesis was the requirement for models describing basin scale overpressure for use in basin modelling studies. It is necessary to identify, understand and describe both the generating ... -
Quasi-linear functionals : theory and applications
(Doctoral thesis, 2001) -
On the theory and numerical analysis of viscosity solutions
(Dr. ingeniøravhandling, 0809-103X; 2001:95, Doctoral thesis, 2001) -
High-Level Image Models with Application to Medical Ultrasonics
(Dr. ingeniøravhandling, 0809-103X; 2001:93, Doctoral thesis, 2001) -
A Posteriori Error Estimation for Finite Element Methods and Iterative Linear Solvers
(Dr. ingeniøravhandling, 0809-103X; 2001:98, Doctoral thesis, 2001)This thesis addresses a posteriori error estimation for finite element methods and iterative linear solvers. Adaptive finite element methods have gained a lot of popularity over the last decades due to their ability to ... -
Numerical analysis and stochastic modeling in mathematical finance
(Dr. ingeniøravhandling, 0809-103X; 2002:96, Doctoral thesis, 2002)The main goal of this thesis has been to study and develop faster and more accurate methods for pricing and hedging exotic options. This has involved work on models describing prices and hedges as well as the stochastics ... -
Numerical solutions of stochastic partial differential equations
(Doktoravhandlinger ved NTNU, 1503-8181; 89, Doctoral thesis, 2002)The main part of this thesis is devoted to the analysis of stochastic partial differential equations of Wick-type. In particular, we study numerical approximations of solutions to boundary value problems for such equations. The ... -
Bayesian networks with applications in reliability analysis
(Dr. ingeniøravhandling, 0809-103X; 2002:121, Doctoral thesis, 2002)A common goal of the papers in this thesis is to propose, formalize and exemplify the use of Bayesian networks as a modelling tool in reliability analysis. The papers span work in which Bayesian networks are merely used ... -
The use of Bayesian Belief Networks for combining disparate sources of information in the safety assessment of software based systems
(Dr. ingeniøravhandling, 0809-103X; 2002:35, Doctoral thesis, 2002)The objective of the research has been to investigate the possibility to transfer the requirements of a software safety standard into Bayesian belief networks (BBNs). The BBN methodology has mainly been developed and applied ... -
Bayesian Seismic AVO Inversion
(Dr. ingeniøravhandling, 0809-103X; 2002:97, Doctoral thesis, 2002)Seismic analysis is a key element in successful exploration and production of natural resources. During the last decades, seismic methodology has had a significant progress with respect to both acquisition, processing and ... -
Scenario tree generation for stochastic programming : cases from finance
(Dr. ingeniøravhandling, 0809-103X; 2003:55, Doctoral thesis, 2003)In recent years, stochastic programming has gained an increasing popularity within the mathematical programming community, mainly because the present computing power allows users to add stochasticity to models that were ... -
Markov Chain Monte Carlo Algorithms and their Applications to Petroleum Reservoir Characterization
(Dr. ingeniøravhandling, 0809-103X; 2003:75, Doctoral thesis, 2003)This thesis consists of papers on stochastic reservoir characterization and Markov chain Monte Carlo algorithms. Stochastic reservoir models are very complex and naturally spatial and high dimensional. This makes them hard ... -
Markov chain Monte Carlo updating schemes for hidden Gaussian Markov random field models
(Dr. ingeniøravhandling, 0809-103X; 2003:89, Doctoral thesis, 2003)Part I discusses how to construct approximations to the posterior distribution π(x|y, θ) of a latent Gaussian Markov random field on a graph of dimension n when data are considered conditionally mutually independent and ... -
On Eigen-decompositions and Adaptivity of Markov Chains
(Dr. ingeniøravhandling, 0809-103X; 2003:102, Doctoral thesis, 2003)Part I and Part III-V concern Markov chain Monte Carlo and in particular those algorithms related to the Metropolis-Hastings algorithm. In Part I-II we apply an eigendecomposition of the transition probability matrix. The ... -
Depth consistent pp and ps seismic angle tomography
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:18, Doctoral thesis, 2004)This thesis addressed the problem of finding background models yielding depth consistent migrated PP and PS images, i.e. geologically equivalent reflectors should be imaged at the same depth in the two images. The tomographic ... -
Wavefront aberration correction in medical ultrasound imaging
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:165, Doctoral thesis, 2004)Medisinsk ultralydavbildning er et relativt rimelig verktøy som er i utstrakte bruk på dagens sykehus og tildels også legekontor. En underliggende antakelse ved dagens avbildningsteknikker er at vevet som skal avbildes i ... -
Numerical Solution og Coupled CFD Problems by the Domain Decomposition Method
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:102, Doctoral thesis, 2004)In this thesis we look at the efficient numerical solution of two complex multi-physics problems which both have very important applications. The first problem is related to the numerical simulation of extrusion of aluminium. ...