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Dissertations / Theses on the topic 'Fractional space'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Gjestland, Fredrik Joachim. "Distributions, Schwartz Space and Fractional Sobolev Spaces." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for matematiske fag, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23452.

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This thesis derives the theory of distributions, starting with test functions as a basis. Distributions and their derivatives will be analysed and exemplified. Schwartz functions are introduced, and the Fourier transform of Schwartz functions is analysed, creating the basis for Tempered distributions on which we also analyse the Fourier transform. Weak derivatives and Sobolev spaces are defined, and from the Fourier transform we define Sobolev spaces of non-integer order. The theory presented is applied to an initial value problem with a derivative of order one in time and an arbitrary differe
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2

Agyo, Sanfo David. "Bi-fractional transforms in phase space." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14522.

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The displacement operator is related to the displaced parity operator through a two dimensional Fourier transform. Both operators are important operators in phase space and the trace of both with respect to the density operator gives the Wigner functions (displaced parity operator) and Weyl functions (displacement operator). The generalisation of the parity-displacement operator relationship considered here is called the bi-fractional displacement operator, O(α, β; θα, θβ). Additionally, the bi-fractional displacement operators lead to the novel concept of bi-fractional coherent states. The ge
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3

Agyo, Sanfo D. "Bi-fractional transforms in phase space." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14522.

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The displacement operator is related to the displaced parity operator through a two dimensional Fourier transform. Both operators are important operators in phase space and the trace of both with respect to the density operator gives the Wigner functions (displaced parity operator) and Weyl functions (displacement operator). The generalisation of the parity-displacement operator relationship considered here is called the bi-fractional displacement operator, O(α, β; θα, θβ). Additionally, the bi-fractional displacement operators lead to the novel concept of bi-fractional coherent states.
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4

Prehl, Janett. "Diffusion on fractals and space-fractional diffusion equations." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201001068.

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Ziel dieser Arbeit ist die Untersuchung der Sub- und Superdiffusion in fraktalen Strukturen. Der Fokus liegt auf zwei separaten Ansätzen, die entsprechend des Diffusionbereiches gewählt und variiert werden. Dadurch erhält man ein tieferes Verständnis und eine bessere Beschreibungsweise für beide Bereiche. Im ersten Teil betrachten wir subdiffusive Prozesse, die vor allem bei Transportvorgängen, z. B. in lebenden Geweben, eine grundlegende Rolle spielen. Hierbei modellieren wir den fraktalen Zustandsraum durch endliche Sierpinski Teppiche mit absorbierenden Randbedingungen und lösen dann die Ma
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5

Lin, Xue Lei. "Separable preconditioner for time-space fractional diffusion equations." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691377.

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6

Holm, John. "work/space : Fractional coherence and ordering in the office." Thesis, Lancaster University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527155.

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7

Deng, Si Wen. "Precondition technique for conservative space-fractional diffusion equations in convex domains." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950597.

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8

Nguyen, Duc M. "Controllability and Observability of the Discrete Fractional Linear State-Space Model." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2574.

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This thesis aims to investigate the controllability and observability of the discrete fractional linear time-invariant state-space model. First, we will establish key concepts and properties which are the tools necessary for our task. In the third chapter, we will discuss the discrete state-space model and set up the criteria for these two properties. Then, in the fourth chapter, we will attempt to apply these criteria to the discrete fractional model. The general flow of our objectives is as follows: we start with the first-order linear difference equation, move on to the discrete system, the
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9

Getachew, Yonas. "Constructing Realistic Real-Space Potentials on the Haldane Sphere for the Fractional Quantum Hall Effect." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10636101.

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<p> A two-dimensional electron system exposed to a strong perpendicular magnetic field at low temperatures (usually below one Kelvin) forms a new state of matter that exhibits the fractional quantum Hall effect. This phenomenon has been observed in graphene, a naturally occurring two-dimensional electron system. The theoretical understanding of the FQHE in graphene is complicated by the fact the electrons have valley and spin degrees of freedom. As a result, the different single-particle energy levels (Landau levels) of the electrons can mix with each other. This Landau level mixing is intrins
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10

Wei, Xing. "Non-asymptotic method estimation and applications for fractional order systems." Thesis, Bourges, INSA Centre Val de Loire, 2017. http://www.theses.fr/2017ISAB0003/document.

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Cette thèse vise à concevoir des estimateurs non-asymptotiques et robustes pour les systèmes linéaires d’ordre fractionnaire dans un environnement bruité. Elle traite une classe des systèmes linéaires d’ordre fractionnaire modélisée par la dite pseudo représentation d’état avec des conditions initiales inconnues. Elle suppose également que les systèmes étudiés ici peuvent être transformés sous la forme canonique de Brunovsky. Pour estimer le pseudo-état, la forme précédente est transformée en une équation différentielle linéaire d’ordre fractionnaire en prenant en compte les valeurs initiales
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11

Alkhoury, Ziad. "Minimality, input-output equivalence and identifiability of LPV systems in state-space and linear fractional representations." Thesis, Poitiers, 2017. http://www.theses.fr/2017POIT2319/document.

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Dans cette thèse, plusieurs concepts importants liés à la théorie de la réalisation des modèles linéaires à paramètres variants (LPV) sont étudiés.Tout d’abord, nous abordons le problème de l’identifiabilité des modèles LPV affines (ALPV). Une nouvelle condition suffisante et nécessaire est introduite afin de garantir l’identifiabilité structurelle pour les paramétrages ALPV. L’identifiabilité de cette classe de paramétrages est liée à l’absence d’isomorphismes liant deux représentations d’état LPV lorsque deux modèles LPV correspondant à différentes valeurs des variables de séquencement sont
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12

Hu, Ke. "On an equation being a fractional differential equation with respect to time and a pseudo-differential equation with respect to space related to Lévy-type processes." Thesis, Swansea University, 2012. https://cronfa.swan.ac.uk/Record/cronfa43021.

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13

Hoffmann, Karl Heinz, Kathrin Kulmus, Christopher Essex, and Janett Prehl. "Between Waves and Diffusion: Paradoxical Entropy Production in an Exceptional Regime." MDPI AG, 2018. https://monarch.qucosa.de/id/qucosa%3A33157.

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The entropy production rate is a well established measure for the extent of irreversibility in a process. For irreversible processes, one thus usually expects that the entropy production rate approaches zero in the reversible limit. Fractional diffusion equations provide a fascinating testbed for that intuition in that they build a bridge connecting the fully irreversible diffusion equation with the fully reversible wave equation by a one-parameter family of processes. The entropy production paradox describes the very non-intuitive increase of the entropy production rate as that bridge is pass
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14

Ba, Shan. "Multi-layer designs and composite gaussian process models with engineering applications." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/44751.

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This thesis consists of three chapters, covering topics in both the design and modeling aspects of computer experiments as well as their engineering applications. The first chapter systematically develops a new class of space-filling designs for computer experiments by splitting two-level factorial designs into multiple layers. The new design is easy to generate, and our numerical study shows that it can have better space-filling properties than the optimal Latin hypercube design. The second chapter proposes a novel modeling approach for approximating computationally expensive functions that
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15

Waddell, Chris. "Fractional calculus and scales of spaces." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288637.

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16

Neves, Julio Severino. "Fractional Sobolev-type spaces and embeddings." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341514.

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17

Anoh, Kelvin Ogbonnaya Okorie. "Advanced MIMO-OFDM technique for future high speed braodband wireless communications : a study of OFDM design, using wavelet transform, fractional fourier transform, fast fourier transform, doppler effect, space-time coding for multiple input, multiple output wireless communications systems." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14400.

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This work concentrates on the application of diversity techniques and space time block coding for future high speed mobile wireless communications on multicarrier systems. At first, alternative multicarrier kernels robust for high speed doubly-selective fading channel are sought. They include the comparisons of discrete Fourier transform (DFT), fractional Fourier transform (FrFT) and wavelet transform (WT) multicarrier kernels. Different wavelet types, including the raised-cosine spectrum wavelets are implemented, evaluated and compared. From different wavelet families, orthogonal wavelets are
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18

Anoh, Kelvin O. O. "Advanced MIMO-OFDM technique for future high speed braodband wireless communications. A study of OFDM design, using wavelet transform, fractional fourier transform, fast fourier transform, doppler effect, space-time coding for multiple input, multiple output wireless communications systems." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14400.

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This work concentrates on the application of diversity techniques and space time block coding for future high speed mobile wireless communications on multicarrier systems. At first, alternative multicarrier kernels robust for high speed doubly-selective fading channel are sought. They include the comparisons of discrete Fourier transform (DFT), fractional Fourier transform (FrFT) and wavelet transform (WT) multicarrier kernels. Different wavelet types, including the raised-cosine spectrum wavelets are implemented, evaluated and compared. From different wavelet families, orthogonal wavele
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19

Stein, Martin. "C0-Semigroup Methods for Delay Equations." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1225964082538-00880.

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In der Dissertation werden Werkzeuge zur Analyse von Wohlgestelltheit und Asymptotik von Integro-Differential- und Verzögerungsgleichungen entwickelt. Im ersten Teil der Arbeit (Kapitel 1 und 2) werden Methoden zur Bestimmung der Modulhalbgruppe (kleinste dominierende C0-Halbgruppe) einer C0-Halbgruppe zur Verfügung gestellt, die unter anderem auf Volterra-Halbgruppen (die aus Integro-Differentialgleichungen hervorgehen) und Evolutionshalbgruppen (Rückkopplungsgleichungen mit Zeitverzögerung, Transport in Netzwerken) angewendet werden. Im Mittelpunkt des zweiten Teils (Kapitel 3 und 4) steht e
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Stein, Martin. "C0-Semigroup Methods for Delay Equations." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A23902.

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In der Dissertation werden Werkzeuge zur Analyse von Wohlgestelltheit und Asymptotik von Integro-Differential- und Verzögerungsgleichungen entwickelt. Im ersten Teil der Arbeit (Kapitel 1 und 2) werden Methoden zur Bestimmung der Modulhalbgruppe (kleinste dominierende C0-Halbgruppe) einer C0-Halbgruppe zur Verfügung gestellt, die unter anderem auf Volterra-Halbgruppen (die aus Integro-Differentialgleichungen hervorgehen) und Evolutionshalbgruppen (Rückkopplungsgleichungen mit Zeitverzögerung, Transport in Netzwerken) angewendet werden. Im Mittelpunkt des zweiten Teils (Kapitel 3 und 4) steht e
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21

Ossman, Hala. "Etude mathématique de la convergence de la PGD variationnelle dans certains espaces fonctionnels." Thesis, La Rochelle, 2017. http://www.theses.fr/2017LAROS006/document.

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On s’intéresse dans cette thèse à la PGD (Proper Generalized Decomposition), l’une des méthodes de réduction de modèles qui consiste à chercher, a priori, la solution d’une équation aux dérivées partielles sous forme de variables séparées. Ce travail est formé de cinq chapitres dans lesquels on vise à étendre la PGD aux espaces fractionnaires et aux espaces des fonctions à variation bornée, et à donner des interprétations théoriques de cette méthode pour une classe de problèmes elliptiques et paraboliques. Dans le premier chapitre, on fait un bref aperçu sur la littérature puis on présente les
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22

Nascimento, Rossane Gomes. "Equações elipticas envolvendo o operador 1/2 -Laplaciano e crescimento exponencial." Universidade Federal da Paraíba, 2015. http://tede.biblioteca.ufpb.br:8080/handle/tede/8070.

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Submitted by Maike Costa (maiksebas@gmail.com) on 2016-03-31T11:50:13Z No. of bitstreams: 1 arquivototal.pdf: 862531 bytes, checksum: 12bbf225d527fa4e802f15f051e89d88 (MD5)<br>Made available in DSpace on 2016-03-31T11:50:13Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 862531 bytes, checksum: 12bbf225d527fa4e802f15f051e89d88 (MD5) Previous issue date: 2015-07-30<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>In this work, we study the existence and multiplicity of weak solutions to a class of elliptic problems involving the 1=2-Laplacian operator
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23

Roy, Pulakesh. "Fractionally Spaced Blind Equalizer Performance Improvement." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31048.

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Blind equalization schemes are used to cancel the effects of a channel on the received signal when the transmission of a training sequence in a predefined time slot is not possible. In the absence of a training sequence, blind equalization schemes can also increase the throughput of the overall system. A general problem with blind adaptation techniques is that they have poor convergence properties compared to the traditional techniques using training sequences. Having a multi-modal cost surface, blind adaptation techniques may force the equalizer to converge to a false minimum, depending on th
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24

Chalk, Carl. "Nonlinear evolutionary equations in Banach spaces with fractional time derivative." Thesis, University of Hull, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440650.

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25

Song, Sanquan 1980. "Fractionally spaced equalization for high-speed links." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/64588.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 115-119).<br>As high-speed links enter the multi-Gb/s era, equalization and clock recovery designs become much more challenging. For conventional links, these two loops are separate with different performance metrics, resulting in sub-optimal performance. Fractionally spaced equalization (FSE) inherently unifies these two functions, and therefore is proposed for joint equalization and synchronizat
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26

Petracca, Fernanda <1983&gt. "Constraints on neutrino mass fraction using Redshift Space Distortions." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6728/.

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Redshift Space Distortions (RSD) are an apparent anisotropy in the distribution of galaxies due to their peculiar motion. These features are imprinted in the correlation function of galaxies, which describes how these structures distribute around each other. RSD can be represented by a distortions parameter $\beta$, which is strictly related to the growth of cosmic structures. For this reason, measurements of RSD can be exploited to give constraints on the cosmological parameters, such us for example the neutrino mass. Neutrinos are neutral subatomic particles that come with three flavours,
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27

Meichsner, Jan [Verfasser]. "Fractional powers of linear operators in locally convex vector spaces / Jan Meichsner." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2021. http://d-nb.info/1237749166/34.

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28

Skowratananont, K. "Adaptive algorithms for blind equalisation of fractionally spaced channels." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325352.

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29

Neto, Paulo Mendes de Carvalho. "Fractional differential equations: a novel study of local and global solutions in Banach spaces." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-06062013-145531/.

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Motivated by the huge success of the applications of the abstract fractional equations in many areas of science and engineering, and by the unsolved question in this theory, in this work we study several matters related to abstract fractional Cauchy problems of order \'alpha\' \'it belongs\' (0, 1). We search to answer some questions that were open: for instance, we analyze the existence of local mild solutions for the problem, and its possible continuation to a maximal interval of existence. The case of critical nonlinearities and corresponding regular mild solutions is also studied. Finally,
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30

Sloane, Craig Andrew. "Hardy-Sobolev-Maz'ya inequalities for fractional integrals on halfspaces and convex domains." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41125.

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This thesis will present new results involving Hardy and Hardy-Sobolev-Maz'ya inequalities for fractional integrals. There are two key ingredients to many of these results. The first is the conformal transformation between the upper halfspace and the unit ball. The second is the pseudosymmetric halfspace rearrangement, which is a type of rearrangment on the upper halfspace based on Carlen and Loss' concept of competing symmetries along with certain geometric considerations from the conformal transformation. After reducing to one dimension, we can use the conformal transformation to prove a sh
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31

Lütkemeyer, Christian. "Konzeption eines Fractionally-Spaced Entzerrers mit quantisierter Rückkopplung und Noise-Whitening /." Düsseldorf : VDI-Verl, 1999. http://www.gbv.de/dms/bs/toc/270561633.pdf.

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32

Zahran, Alyaa R. "On the Efficiency of Designs for Linear Models in Non-regular Regions and the Use of Standard Desings for Generalized Linear Models." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28208.

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The Design of an experiment involves selection of levels of one or more factor in order to optimize one or more criteria such as prediction variance or parameter variance criteria. Good experimental designs will have several desirable properties. Typically, one can not achieve all the ideal properties in a single design. Therefore, there are frequently several good designs and choosing among them involves tradeoffs. This dissertation contains three different components centered around the area of optimal design: developing a new graphical evaluation technique, discussing designs for non-regu
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33

Dima, Ute [Verfasser], and Arnd [Akademischer Betreuer] Rösch. "Regularization in fractional order Sobolev spaces for a parameter identification problem / Ute Dima ; Betreuer: Arnd Rösch." Duisburg, 2017. http://d-nb.info/1147681287/34.

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34

Naeem, Usra. "Estimating dead space ventilation : a computational modelling approach towards evaluation of clinical estimates of dead space fraction in critically ill patients." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51774/.

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Dead space is the part of tidal volume that does not participate in gas exchange and represents wasted ventilation. It is often increased in pulmonary diseases. Quantification of dead space by the original Bohr’s equation requires measuring mean alveolar pressure of CO2 (PACO2) and mixed expired partial pressure of CO2 (PĒCO2). Because of the difficulties and technical issues related with measuring PACO2 and PĒCO2, alternative methods have been proposed for the estimation of dead space. This thesis attempts to explore the performance of some methods proposed for the estimation of dead space
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Davis, Michael S. "Evaluation of clinical methods of pulmonary gas exchange assessment in the standing horse." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-01242009-063110/.

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36

Yu, Sai Hung. "The origin of the lipopolysaccharide in the periplasmic space fraction of Alteromonas haloplanktis 214 /." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55685.

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37

Krafczyk, Matthew Scott. "A precision measurement of the cosmic ray positron fraction on the International Space Station." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107043.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 118-128).<br>AMS-02 is a precision particle physics experiment in space aiming to study dark matter, antimatter, and properties of cosmic rays to the TeV energy scale. This thesis presents a study of the cosmic ray positron fraction in AMS-02 data covering an energy range of 0.5 GeV to 500 GeV, and identifies 10.3 x 106 electron and 650 x 101 positron events. The results show that the positron fraction increases with energy a
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Victor, Stéphane. "Identification par modèle non entier pour la poursuite robuste de trajectoire par platitude". Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14115/document.

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Les études menées permettent de prendre en main un système depuis l’identification jusqu’à la commande robuste des systèmes non entiers. Les principes de la platitude permettent de parvenir à la planification de trajectoire à condition de connaître le modèle du système, d’où l’intérêt de l’identification des paramètres du système. Les principaux travaux de cette thèse concernent l’identification de système par modèles non entiers, la génération et la poursuite robuste de trajectoire par l’application des principes de la platitude aux systèmes non entiers.Le chapitre 1 rappelle les définitions et pr
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39

Brauer, Uwe, and Lavi Karp. "Local existence of classical solutions for the Einstein-Euler system using weighted Sobolev spaces of fractional order." Universität Potsdam, 2006. http://opus.kobv.de/ubp/volltexte/2009/3017/.

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We prove the existence of a class of local in time solutions, including static solutions, of the Einstein-Euler system. This result is the relativistic generalisation of a similar result for the Euler-Poisson system obtained by Gamblin [8]. As in his case the initial data of the density do not have compact support but fall off at infinity in an appropriate manner. An essential tool in our approach is the construction and use of weighted Sobolev spaces of fractional order. Moreover, these new spaces allow us to improve the regularity conditions for the solutions of evolution equations. The deta
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40

Arnesen, Mathias Nikolai. "An Introduction to Distributions and Sobolev Spaces, and a Study of the Fractional Partial Differential Operator1+ (-Δ)s⁄2." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for matematiske fag, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23895.

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In this thesis we derive the basic theory for distributions, fractional and classical Sobolevspaces and the direct method of variations, and apply this theory to discuss solutions of the dirichlet problem for a fractional operator related to the laplacian on both bounded open sets and the whole space, for any dimension. We use both the direct methods of variations and Lax-Milgram to find solutions. We also discuss the spectrum of the operator and give a characterisation of all eigenvalues and eigenfunctions onbounded open sets.
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Macedo, Bruno Vicente Marchi de. "Caracterização de espaços de potência fracionária por meio de operadores pseudodiferenciais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-01092016-105238/.

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Neste trabalho mostramos uma caracterização para os espaços de potência fracionária associados ao operador 1 - &Delta;p, em que &Delta;p representa o fecho do operador laplaciano em Lp(Rn), usando o fato de que o mesmo pode ser visto como um operador pseudodiferencial com símbolo a(&xi;) = 1+4&pi;2|&xi;|2. No processo para obter essa caracterização representamos de maneira concreta a solução abstrata u : [0;+ &infin;) &rarr; Lp(Rn), obtida através da teoria de operadores setoriais e semigrupos analíticos, da equação u - &Delta;pu = 0 em (0;+&infin;) com condição inicial u(0) = f &isin; Lp(Rn)
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42

Cesbron, Ludovic. "On the derivation of non-local diffusion equations in confined spaces." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/270355.

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The subject of the thesis is the derivation of non-local diffusion equations from kinetic models with heavy-tailed equilibrium in velocity. We are particularly interested in confining the kinetic equations and developing methods that allow us, from the confined kinetic models, to derive confined versions of non-local diffusion equations.
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43

Terzi, Marina. "LOCAL WELL POSEDNESS, REGULARITY, AND STABILITY FOR THE TIME-FRACTIONAL BURGERS PIDES ON THE WHOLE ONE, TWO, AND THREE DIMENSIONAL SPACES." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1595780869268506.

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44

Algervik, Robert. "Embedding Theorems for Mixed Norm Spaces and Applications." Licentiate thesis, Karlstad : Faculty of Technology and Science, Mathematics, Karlstads universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2874.

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45

Herlemont, Basile. "Differential calculus on h-deformed spaces." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0377/document.

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L'anneau $\Diff(n)$ des opérateurs différentiels $\h$-déformés apparaît dans la théorie des algèbres de réduction.Dans cette thèse, nous construisons les anneaux des opérateurs différentiels généralisés sur les espaces vectoriels $\h$-déformés de type $\gl$. Contrairement aux espaces vectoriels $q$-déformés pour lequel l'anneau des opérateurs différentiels est unique \`a isomorphisme pr\`es, l'anneau généralisé des opérateurs différentiels $\h$-déformés $\Diffs(n)$ est indexée par une fonction rationnelle $\sigma$ en $n$ variables, solution d'un syst\`eme d\'eg\'en\'er\'e d'\'equations aux dif
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46

Asimenou, Monika. "L’art à Chypre de 1974 à 2014 : de l’espace fractionné au lieu symbolique." Thesis, Paris 10, 2015. http://www.theses.fr/2015PA100028.

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En 1974, l’île de Chypre s’est vue contrainte à la partition suite à une intervention militaire turque. Plus d’un tiers du territoire chypriote est encore occupé – en 2014 – par l’armée turque tandis qu’une ligne de démarcation, dite zone morte, protégée par les Casques bleus des Nations Unies, sépare les habitants de l’île entre d’un côté – au sud – les chypriotes grecs et de l’autre – au nord – les chypriotes turcs et les colons turcs.Le lieu symbolique que crée l’art à Chypre – ce territoire balafré – reproduit-il la dualité territoriale et les conséquences de la partition de l’île ? Objets
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47

Siddiqui, Muniza. "The Use of Pulmonary Dead Space Fraction to Identify Risk of Prolonged Mechanical Ventilation in Children after Cardiac Surgery." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/623533.

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A Thesis submitted to The University of Arizona College of Medicine - Phoenix in partial fulfillment of the requirements for the Degree of Doctor of Medicine.<br>Children with prolonged mechanical ventilation after cardiac surgery have a higher risk for poor outcome due to a variety of ventilator‐associated morbidities. It therefore becomes essential to identify these children at higher risk of prolonged mechanical ventilation as well as find methods to identify children ready to be extubated as early as possible to avoid these complications. One physiological variable, the pulmonary dead spac
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48

Hiroi, Kazuo. "X-ray Studies of Space Density and Obscured Fraction of Active Galactic Nuclei in Local and High-Redshift Universe." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175124.

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49

Basara, Laurent. "Performance of the Electromagnetic Calorimeter of AMS-02 on the International Space Station ans measurement of the positronic fraction in the 1.5 – 350 GeV energy range." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY012/document.

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L'expérience AMS-02 est un détecteur de particules installé sur la station spatiale internationale (ISS) depuis mai 2011, date à partir de laquelle il mesure les caractéristiques des rayons cosmiques afin d'apporter des réponses aux problématiques soulevées par la physique des astroparticules depuis quelques décennies, en particulier l'étude indirecte de la matière sombre et la recherche d'antimatière. Les aspects phénoménologiques de la physique des rayons cosmiques sont revus dans la première partie. Une deuxième décrit les performances en vol des différents sous-détecteurs d'AMS-02, en part
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50

Fadiga, Lamine. "Commande h∞ à base de modèles non entiers." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0090/document.

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Les études menées permettent d’étendre la méthodologie de commande H∞ aux modèles décrits par des équations différentielles faisant intervenir des ordres de dérivation non entiers. Deux approches sont proposées. La première consiste à réécrire le modèle non entier comme un modèle entier incertain afin de pouvoir utiliser les méthodes de commande H∞ développées pour les modèles entiers. La seconde approche consiste à développer des conditions LMI spécifiques aux modèles non entiers à partir de leur pseudo représentation d’état. Ces deux approches sont appliquées à l’isolation vibratoire d’un po
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