Blar i Institutt for matematiske fag på tittel
Viser treff 1771-1790 av 2377
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Reduced basis modeling of hierarchical flow systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:212, Doctoral thesis, 2005)In this thesis we consider the reduced basis element method for approximating the solution of parameter dependent problems described by partial differential equations. In particular we focus on fluid flow in pipes, ... -
Reduced Order Modeling Techniques for Non-Affine Problems in Solid Mechanics
(Master thesis, 2022)For å aktivere den fulle kraften til offline-online konseptet i Redusert Ordens Modellering (ROM), må det parametriserte problemet være affint under variasjon av parameterne. Imidlertid er mange relevante problemer, spesielt ... -
Reduced Order Modelling of Component Based Analysis for Stokes Flow
(Master thesis, 2021)En parameteravhengig versjon av Stokes Partielle Differensialligning (PDE) undersøkes, med et mål om å modellere flyt i et villkårlig rørsystem. Rørsystemet bygges opp av subdomener kalt komponenter eller erketyper. Stokes ... -
Reduced order models for finite-volume simulations of turbulent flow around wind-turbine blades
(Journal article; Peer reviewed, 2021) -
A reduced-rank approach to predicting multiple binary responses through machine learning
(Peer reviewed; Journal article, 2023)This paper investigates the problem of simultaneously predicting multiple binary responses by utilizing a shared set of covariates. Our approach incorporates machine learning techniques for binary classification, without ... -
Reducibility of parameter ideals in low powers of the maximal ideal
(Peer reviewed; Journal article, 2021)A commutative noetherian local ring (R, m) is Gorenstein if and only if every parameter ideal of R is irreducible. Although irreducible parameter ideals may exist in non-Gorenstein rings, Marley, Rogers, and Sakurai show ... -
Reduction of Dimensionality in Spatiotemporal Models
(Doctoral Theses at NTNU, 1503-8181; 2010:193, Doctoral thesis, 2010) -
A refinement of Gorenstein flat dimension via the flat--cotorsion theory
(Peer reviewed; Journal article, 2021)We introduce a refinement of the Gorenstein flat dimension for complexes over an associative ring—the Gorenstein flat-cotorsion dimension—and prove that it, unlike the Gorenstein flat dimension, behaves as one expects of ... -
Refining the Internet Voting Protocol
(Master thesis, 2011)We make two improvements to the Internet voting protocol written by Gjøsteen. The first improvement improves the performance of the protocol, by changing the encryption of the votes. The second improvement improves the ... -
Regularity for an anisotropic equation in the plane
(Journal article, 2018)We present a simple proof of the C1 regularity of p-anisotropic functions in the plane for 2≤p <∞. We achieve a logarithmic modulus of continuity for the derivatives.The monotonicity (in the sense of Lebesgue) of the ... -
Regularity of solutions of the parabolic normalized p-Laplace equation
(Journal article; Peer reviewed, 2018)The parabolic normalized p-Laplace equation is studied. We prove that a viscosity solution has a time derivative in the sense of Sobolev belonging locally to L2. -
Regularity of the p-Poissson Equation in the Plane
(Journal article; Peer reviewed, 2017)We study the regularity of the p-Poisson equation Δpu=h,h∈Lq, Δpu=h,h∈Lq, in the plane. In the case p > 2 and 2 < q < ∞, we obtain the sharp Hölder exponent for the gradient. In the other cases, we come arbitrarily close ... -
Regularity results for the Dirac-Klein-Gordon equations
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2009) -
A Regularized System for the Nonlinear Variational Wave Equation
(Doctoral theses at NTNU;2021:21, Doctoral thesis, 2021) -
A regularized system for the nonlinear variational wave equation
(Peer reviewed; Journal article, 2023)We present a new generalization of the nonlinear variational wave equation. We prove existence of local, smooth solutions for this system. As a limiting case, we recover the nonlinear variational wave equation. -
Rekursiv blokkoppdatering av Isingmodellen
(Master thesis, 2006)I denne rapporten sammenligner vi tre varianter av Markov Chain Monte Carlo (MCMC) - simulering av Isingmodellen. Vi sammenligner enkeltnode-oppdatering, naiv blokkoppdatering og rekursiv blokkoppdatering. Vi begynner med ... -
Relating abelian categories to triangulated categories using generalized cluster tilting methods
(Doctoral thesis at NTNU;2016:75, Doctoral thesis, 2016) -
Relations between infinitesimal non-commutative cumulants
(Journal article; Peer reviewed, 2021)Boolean, free and monotone cumulants as well as relations among them, have proven to be important in the study of non-commutative probability theory. Quite notably, Boolean cumulants were successfully used to study free ... -
Relative Variable Importance Approaches for Linear Models with Random Intercepts
(Master thesis, 2022)Å tolke lineære regresjonsmodeller er et vanlig ønske innen forskning. Et vanlig spørsmål forskere er interessert i er hvor viktig en prediktor er for modellen. Å vite den individuelle betydningen av hver prediktor kan ... -
Relative variable importance: A comparison between R^2 decomposition and variable importance in machine learning
(Master thesis, 2021)I en regresjonsanalyse er vi ofte interessert i hvilke parametere som har størst påvirkning på responsvariabelen. Selv om det er gjort mye forskning på dette området når det kommer til lineære regresjonsmodeller, er det ...