Sökning: "order of convergence"

Visar resultat 1 - 5 av 296 avhandlingar innehållade orden order of convergence.

1. 1. A tale of trees and leaves : subtrees and local convergence

   Författare :Wang Ruoyu; Stephan Wagner; Haslegrave John; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tree; subtree; mean subtree order; Benjamini Schramm convergence; local convergence; Mathematics; Matematik;

   Sammanfattning : Given a tree T, a subtree in T is a subgraph that is a tree itself. The set of subtrees in a tree is related to many important graph parameters, one of which is the mean subtree order. LÄS MER

3. 2. Selected Topics in Homogenization

   Författare :Jens Persson; Anders Holmbom; Liselott Flodén; Marianne Olsson Lindberg; Mårten Gulliksson; Peter Wall; Mittuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; homogenization theory; H-convergence; two-scale convergence; very weak two-scale convergence; multiscale convergence; very weak multiscale convergence; evolution-multiscale convergence; very weak evolution-multiscale convergence; λ-scale convergence; non-periodic linear elliptic problems; evolution-multiscale linear parabolic problems; evolution-multiscale monotone parabolic problems; detection of scales of heterogeneity;

   Sammanfattning : The main focus of the present thesis is on the homogenization of some selected elliptic and parabolic problems. More precisely, we homogenize: non-periodic linear elliptic problems in two dimensions exhibiting a homothetic scaling property; two types of evolution-multiscale linear parabolic problems, one having two spatial and two temporal microscopic scales where the latter ones are given in terms of a two-parameter family, and one having two spatial and three temporal microscopic scales that are fixed power functions; and, finally, evolution-multiscale monotone parabolic problems with one spatial and an arbitrary number of temporal microscopic scales that are not restricted to be given in terms of power functions. LÄS MER

4. 3. Effective Spatial Mapping for Coupled Code Analysis of Thermal–Hydraulics/Neutron–Kinetics of Boiling Water Reactors

   Författare :Joanna Peltonen; Weimin Ma; Maria Avramova; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boiling Water Reactor; RELAP5; TRACE; PARCS; Coupled TH NK analysis; Spatial Mapping; Turbine Trip; Feedwater Transient; Control Rod Drop; Reactor Stability; Hierarchical Clustering; kokvattenreaktor; reaktoranalys; RELAP5; TRACE; PARCS; TH NK analys; turbin tripp; matarvatten transient; fallande styrstav; reaktor stabilitet; hierarkisk klustringsmetodik; SRA - Energy; SRA - Energi;

   Sammanfattning : Analyses of nuclear reactor safety have increasingly required coupling of full three dimensional neutron kinetics (NK) core models with system transient thermal–hydraulics (TH) codes.  In order to produce results within a reasonable computing time, the coupled codes use two different spatial description of the reactor core. LÄS MER

5. 4. Free to Move Along : On the Urbanisation of Cross-border Mobility Controls - A Case of Roma 'EU migrants' in Malmö, Sweden

   Författare :Maria Persdotter; Listerborn Carina; Kirsten Simonsen; Ryan Powell; Per-Markku Ristilammi; Tatiana Fogelman; Malmö universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; migration; borders; urban governance; vulnerable EU citizens; eu migrants; squatting; racialisation; homelessness; eu citizenship;

   Sammanfattning : Den här avhandlingen – som jag valt att ge den svenska titeln Fri att röra sig, förvisad att röra sig: Rörlighetskontrollens urbanisering – Fallet med romska EU-medborgare i Malmö – behandlar den lokala politik som utvecklades i Malmö under åren 2014–2016 i förhållande till närvaron av så kallade utsatta EU-medborgare, och utvecklar ett teoretiskt resonemang om hur exkluderande gränser tar plats och blir till i städer. ”Utsatta EU-medborgare” är ett begrepp som används av svenska myndigheter för att beteckna medborgare från andra EU länder som vistas i Sverige utan en fast uppehållsrätt och som befinner sig i situationer präglade av extrem fattigdom och marginalisering. LÄS MER

7. 5. Convergence of Option Rewards

   Författare :Robin Lundgren; Dmitrii Silvestrov; Kimmo Eriksson; Anatoliy Malyarenko; Johan Tysk; Mälardalens högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied mathematics; Tillämpad matematik; Mathematics Applied Mathematics; matematik tillämpad matematik;

   Sammanfattning : This thesis consists of an introduction and five articles devoted to optimal stopping problems of American type options. In article A, we get general convergence results for the American option rewards for multivariate Markov price processes. These results are used to prove convergence of tree approximations presented in papers A, B, C and E. LÄS MER