Browsing Institutt for matematiske fag by Title
Now showing items 2255-2274 of 2359
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Twisted Convolution Algebras and Applications to Gabor Analysis
(Doctoral theses at NTNU;2021:155, Doctoral thesis, 2021)This thesis concerns several aspects of twisted convolution algebras, with a particular focus on problems arising in Gabor analysis. A significant portion of the thesis is dedicated to the study of Hilbert C -modules known ... -
Two classes of quadratic vector fields for which the Kahan discretization is integrable
(Journal article, 2016) -
Two results in Harmonic analysis and PDEs
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:170, Doctoral thesis, 2014) -
Two types of Rubio de Francia operators on Triebel-Lizorkin and Besov spaces
(Peer reviewed; Journal article, 2018)We discuss generalizations of Rubio de Francia’s inequality for Triebel–Lizorkin and Besov spaces, continuing the research from Osipov (Sb Math 205(7): 1004–1023, 2014) and answering Havin’s question to one of the authors. ... -
Two Weight Discrete Hilbert Transforms and Systems of Reproducing Kernels
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:124, Doctoral thesis, 2011)The Hilbert transform has become increasingly popular over the years due to its wide ranging applications not only in mathematics, but also in many other applied areas. In a quest for more applications, studying various ... -
Two-dimensional simulation methods for offshore wind turbines
(Doctoral thesis at NTNU;2015:131, Doctoral thesis, 2015) -
Two-sided p-values for a non-symmetric distribution of test statistics
(Bachelor thesis, 2022)I denne oppgaven undersøkes ulike måter å beregne p-verdier for en tosidig hypotesetest hvor testobservatoren har en usymmetrisk sannsynlighetsfordeling. Først gis en kort introduksjon til statistiske begreper før Fishers ... -
Two-variable fibrations, factorisation systems and -categories of spans
(Peer reviewed; Journal article, 2023)We prove a universal property for ∞-categories of spans in the generality of Barwick’s adequate triples, explicitly describe the cocartesian fibration corresponding to the span functor, and show that the latter restricts ... -
Unbounded HIBE with Tight Security
(Peer reviewed; Journal article, 2020)We propose the first tightly secure and unbounded hierarchical identity-based encryption (HIBE) scheme based on standard assumptions. Our main technical contribution is a novel proof strategy that allows us to tightly ... -
Uncertainty Assessment in Ensemble Kalman Filters
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:246, Doctoral thesis, 2009) -
Uncertainty Measures and Transfer Learning in Active Learning for Text Classification
(Master thesis, 2019)Dyp læring har blitt et fremtredende og populært verktøy i et bredt spekter av applikasjoner som omhandler behandling av komplekse data. For å kunne trene en modell tilstrekkelig, er imidlertid dyp læring avhengig av store ... -
Uncertainty principle via variational calculus on modulation spaces
(Journal article; Peer reviewed, 2022)We approach uncertainty principles of Cowling-Price-Heis-enberg-type as a variational principle on modulation spaces. In our discussion we are naturally led to compact localization operators with symbols in modulation ... -
Uncertainty Principles in Time-Frequency Analysis – Fractals and Schrödinger Evolutions
(Doctoral theses at NTNU;2023:162, Doctoral thesis, 2023)In this thesis we study two uncertainty principles from the perspective of timefrequency analysis. The first part, to which a significant portion is dedicated, is concerned with deriving an analog in the joint time-frequency ... -
Uncertainty propagation through a point model for steady-state two-phase pipe flow
(Peer reviewed; Journal article, 2020)Uncertainty propagation is used to quantify the uncertainty in model predictions in the presence of uncertain input variables. In this study, we analyze a steady-state point-model for two-phase gas-liquid flow. We present ... -
Unconditionally Secure NIZK in the Fine-Grained Setting
(Peer reviewed; Journal article, 2022)Non-interactive zero-knowledge (NIZK) proof systems are often constructed based on cryptographic assumptions. In this paper, we propose the first unconditionally secure NIZK system in the AC0 -fine-grained setting. More ... -
Uncovering the drivers of host-associated microbiota with joint species distribution modelling
(Journal article; Peer reviewed, 2018)In addition to the processes structuring free‐living communities, host‐associated microbiota are directly or indirectly shaped by the host. Therefore, microbiota data have a hierarchical structure where samples are nested ... -
Understanding module categories through triangulated categories using Auslander-Reiten theory
(Doctoral thesis at NTNU;2016:223, Doctoral thesis, 2016) -
Understanding the Population Structure Correction Regression
(Peer reviewed; Journal article, 2022) -
Ungulate population monitoring in an open tundra landscape:distance sampling versus total counts
(Journal article; Peer reviewed, 2017)Researchers and wildlife managers strive for low bias and high precision (i.e. high accuracy) when estimating animal population sizes. Distance sampling is currently one of the most widely used monitoring methods. However, ... -
Uniform tail estimates and Lp(RN)-convergence for finite-difference approximations of nonlinear diffusion equations
(Journal article; Peer reviewed, 2022)