Blar i Institutt for matematiske fag på tittel
Viser treff 1607-1626 av 2364
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Permutations, power operations, and the center of the category of racks
(Journal article, 2018)Racks and quandles are rich algebraic structures that are strong enough to classify knots. Here we develop several fundamental categorical aspects of the theories of racks and quandles and their relation to the theory of ... -
Persistence Initialization: a novel adaptation of the Transformer architecture for time series forecasting
(Peer reviewed; Journal article, 2023)Time series forecasting is an important problem, with many real world applications. Transformer models have been successfully applied to natural language processing tasks, but have received relatively little attention for ... -
Persistent homology: Applications and a computational simplification
(Doctoral thesis at NTNU;2015:345, Doctoral thesis, 2015) -
Petroleum exploration with Bayesian Networks: From prospect risk assessment to optimal exploration
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:273, Doctoral thesis, 2012) -
Phase-type inference on competing risks models with covariates, using MCMC methods
(Master thesis, 2014)The aim with this Master's thesis has been to develop a method of fitting a Phase-type model to a competing risks data set with covariates, and to approximate an underlying model such that important functionals and quantities ... -
Phase-type modeller for konkurrerende risikoer - Tilpasning til datasett og identifiserbarhet av modellene
(Master thesis, 2015)Phase-type modeller for konkurrerende risikodata blir tilpasset to datasett. Begge datasettene omhandler pasienter innlagt på en intensivavdeling, og deres tid til de konkurrerende risikoene død eller utskrivelse. Det ... -
Phase-Type Models and Their Extension to Competing Risks
(Chapter, 2018)We present an extension of the phase-type methodology for modeling of lifetime distributions to include the case of competing risks. This is done by considering finite state Markov chains in continuous time with more than ... -
Phase-type models for competing risks, with emphasis on identifiability issues
(Peer reviewed; Journal article, 2022)We first review some main results for phase-type distributions, including a discussion of Coxian distributions and their canonical representations. We then consider the extension of phase-type modeling to cover competing ... -
Phase-type models involving restarting and instantaneous transitions, with applications to degradation and maintenance
(Peer reviewed; Journal article, 2023)A phase-type distribution is the distribution of time to absorption for an absorbing continuous-time finite state Markov chain. The paper first reviews the extension of the phase-type setting to modeling of competing risks ... -
Phenological asynchrony: a ticking time‐bomb for seemingly stable populations?
(Peer reviewed; Journal article, 2020)Climate change has been shown to induce shifts in the timing of life‐history events. As a result, interactions between species can become disrupted, with potentially detrimental effects. Predicting these consequences has ... -
Physics guided machine learning using simplified theories
(Peer reviewed; Journal article, 2021)Recent applications of machine learning, in particular deep learning, motivate the need to address the generalizability of the statistical inference approaches in physical sciences. In this Letter, we introduce a modular ... -
Physics-Informed Bayesian Calibration Accounting for Model Discrepancy in a Linearized Homogeneous Ordinary Differential Equation
(Master thesis, 2023)Denne masteroppgåva utforskar eit fysikkinformert, fullstendig bayesiansk rammeverk for parameterestimering og usikkerheitsanalyse i lineariserte homogene ordinære differensiallikningar (ODE-ar). Vi undersøkjer korleis eit ... -
Physics-Informed Statistical Machine Learning and Methods for Digital Twins
(Doctoral theses at NTNU;2023:177, Doctoral thesis, 2023) -
Picard groups and duality for real Morava E–theories
(Peer reviewed; Journal article, 2021) -
Picnic with Friends: Constructing post quantum digital signature schemes
(Master thesis, 2021)Det digitale signatursystemet, Picnic [5], er et post-kvantesystem som ble introdusert som en del av NIST-prosessen for å standardisere post-kvantekryptografi [15]. Vi ser på hvordan Picnic er konstruert, og sikkerhetsegenskapene ... -
Places of Learning: A Discussion of Radcliffe’s Framework for Learning Spaces in Light of Merleau-Ponty’s Phenomenology
(Journal article; Peer reviewed, 2024)This paper presents a discussion of Radcliffe’s pedagogy-space-technology (PST) framework for the development, implementation, and evaluation of learning spaces in light of Merleau-Ponty’s Phenomenology of Perception. The ... -
Planetary Boundary for Chemical Pollution: - a review of the case chemical DDT
(Master thesis, 2014)Chemical industry has been given a great deal of attention after several chemicals have shown global distribution and incidents with high toxic effects. The effects observed with some chemicals poses as a threat to both ... -
Plant defence responses in oilseed rape MINELESS plants after attack by the cabbage moth Mamestra brassicae
(Journal article; Peer reviewed, 2015)The Brassicaceae family is characterized by a unique defence mechanism known as the ‘glucosinolate–myrosinase’ system. When insect herbivores attack plant tissues, glucosinolates are hydrolysed by the enzyme myrosinase (EC ... -
Plasmonic eigenvalue problem for corners: limiting absorption principle and absolute continuity in the essential spectrum
(Peer reviewed; Journal article, 2021)We consider the plasmonic eigenvalue problem for a general 2D domain with a curvilinear corner, studying the spectral theory of the Neumann–Poincaré operator of the boundary. A limiting absorption principle is proved, valid ... -
Point Multiplication
(Master thesis, 2012)We have looked at some theory behind the Weierstrass curve, Hessian curve and Edwards curve. Also the cost of the Weierstrass curve and the Edwards curve have been measured for different wNAF representations.