Blar i Institutt for matematiske fag på tittel
Viser treff 1391-1410 av 2364
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A note on the mean values of the derivatives of ζ/ζ
(Peer reviewed; Journal article, 2022)Assuming the Riemann hypothesis, we obtain a formula for the mean value of the -derivative of , depending on the pair correlation of zeros of the Riemann zeta-function. This formula allows us to obtain new equivalences ... -
Note on the resonance method for the Riemann zeta function
(Journal article; Peer reviewed, 2018)We improve Montgomery’s Ω-results for |ζ(σ + it)| in the strip 1/2 σ 1 and give in particular lower bounds for the maximum of |ζ(σ+it)| on √ T ≤ t ≤ T that are uniform in σ. We give similar lower bounds for the maximum of ... -
A note on the zeros of approximations of the Ramanujan Ξ−function
(Peer reviewed; Journal article, 2020)In this paper we review the study of the distribution of the zeros of certain approximations for the Ramanujan Ξ-function given by Ki (Ramanujan J 17(1):123–143, 2008), and we provide new proofs of his results. Our approach ... -
Notes on the Short Ck’s
(Journal article, 2022) -
The Notion of Presence in a Telematic Cross-Disciplinary Program for Music,Communication and Technology
(Chapter, 2020)This anthology presents research projects that examine the intersection between music, technology and education from a variety of perspectives. The contributors are from a range of educational programs within traditional ... -
A novel approach to rigid spheroid models in viscous flows using operator splitting methods
(Peer reviewed; Journal article, 2019)Calculating cost-effective solutions to particle dynamics in viscous flows is an important problem in many areas of industry and nature. We implement a second-order symmetric splitting method on the governing equations for ... -
A novel fault detection and diagnosis approach based on orthogonal autoencoders
(Peer reviewed; Journal article, 2022)In recent years, there have been studies focusing on the use of different types of autoencoders (AEs) for monitoring complex nonlinear data coming from industrial and chemical processes. However, in many cases the focus ... -
Novel statistical variance and dependency models in quantitative genetics: Enabled by recent inference methods
(Doctoral theses at NTNU;2020:217, Doctoral thesis, 2020) -
Number Field Sieve
(Master thesis, 2013)The Number Field Sieve (NFS) is the fastest known general method for factoring integers having more than 120 digits. In this thesis we will will study the algebraic number theory that lies behind the algorithm, describe ... -
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 Analysis of NREL 5MW Wind Turbine: A Study Towards a Better Understanding of Wake Characteristic and Torque Generation Mechanism
(Journal article; Peer reviewed, 2016)With the increased feasibility of harvesting offshore wind energy, scale of wind turbines is growing rapidly and there is a trend towards clustering together higher number of turbines in order to harvest maximum yield and ... -
Numerical approximation of conformal mappings
(Master thesis, 2010)A general introduction to conformal maps and the Riemann mapping theorem is given. Three methods for numerically approximating conformal maps from arbitrary domains to the unit disc are presented: the Schwarz-Christoffel ... -
Numerical Approximation of Temperature Distribution in Deep Water Wells
(Master thesis, 2019)Dagens metoder for Early Kick Detection ved boring av dype vannbrønner er basert på flyt målere eller aktiv volumkontroll. Det vil si at man måler netto gevinst eller netto tap av sirkulasjon på et gitt tidspunkt. Man vil ... -
Numerical Aspects of Flow Based Local Upscaling
(Master thesis, 2013)We start this thesis by giving an introduction to reservoir simulation and upscaling in particular. The most common upscaling techniques, including power averaging methods and flow based local and global methods [10], are ... -
Numerical benchmarking of fluid–structure interaction: An isogeometric finite element approach
(Journal article; Peer reviewed, 2016)In this paper we describe and evaluate an isogeometric finite element program, IFEM-FSI, for doing coupled fluid–structure interaction simulations. We investigate the role played by employing higher polynomial orders and ... -
Numerical bifurcation for the capillary Whitham equation
(Journal article, 2017)The so-called Whitham equation arises in the modeling of free surface water waves, and combines a generic nonlinear quadratic term with the exact linear dispersion relation for gravity waves on the free surface of a fluid ... -
Numerical conservative solutions of the Hunter–-Saxton equation
(Peer reviewed; Journal article, 2021)In the article a convergent numerical method for conservative solutions of the Hunter–Saxton equation is derived. The method is based on piecewise linear projections, followed by evolution along characteristics where the ... -
Numerical Experiments on a Deep Learning Approach to Solving High- Dimensional Partial Differential Equations
(Master thesis, 2020)Denne masteroppgaven utforsker en metode for å løse høydimensjonale partielle differentialligninger ved bruk av dyp læring. Numerisk analyse av partielle differentialligninger er av stor betydning ettersom det kan beskrive ... -
Numerical integration in inverse problems for ordinary differential equations
(Master thesis, 2022)Dersom ein kjenner punkter av løysinga til ei ordinær differensiallikning (ODE), handlar det inverse problemet om å finne ein approksimasjon av vektorfeltet. Ei forskingsretning som nyleg har vorte særs aktiv, dreier seg ... -
Numerical investigation of blade roughness impact on the aerodynamic performance and wake behavior of horizontal axis wind turbine
(Peer reviewed; Journal article, 2023)This research focuses on the effect of leading-edge erosion on the performance of wind turbines, specifically the GE1.5XLE horizontal axis wind turbine. The blade element momentum (BEM) method is used to predict the ...