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Dissertations / Theses on the topic 'Differential transformations'

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1

Guthrie, Graeme Alexander. "Miura transformations and symmetry groups of differential equations." Thesis, University of Canterbury. Mathematics, 1993. http://hdl.handle.net/10092/7960.

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The main aim of this work is to develop a generalization of the Miura transformation based on symmetry groups of differential equations. Some applications of the resulting transformations are presented. The central idea is a construction, called an HC-projection, which will generalize the well known Hopf-Cole transformation. With every differential equation there will be associated certain geometric objects which can be represented by new differential equations. These new differential equations inherit symmetries from the original differential equation. The reductions of these new differentia
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Voepel, Tammy. "Variable transformations for difference equations /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841344.

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3

Lindblom, Ove. "Painlevé analysis and transformations for nonlinear partial differential equations /." Luleå, 2001. http://epubl.luth.se/1402-1544/2001/16/index.html.

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4

Lindblom, Ove. "Painlevé analysis and transformations for nonlinear partial differential equations." Doctoral thesis, Luleå tekniska universitet, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16794.

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Nonlinear partial differential equations play a fundamental role in the description of many physical models. In order to get a complete understanding of the phenomena which are modeled it is important to obtain exact analytic solutions. In this thesis several methods are investigated to construct analytic solutions and to classify nonlinear partial differential equations with respect to those methods. The main emphasis is on the Painlevé analysis and transformations of partial differential equations (PDEs). The Painlevé analysis for PDEs was introduced by a group of American Mathematicians in
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5

Ligo, Richard G. "Conformal transformations, curvature, and energy." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5550.

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Space curves have a variety of uses within mathematics, and much attention has been paid to calculating quantities related to such objects. The quantities of curvature and energy are of particular interest to us. While the notion of curvature is well-known, the Mobius energy is a much newer concept, having been first defined by Jun O'Hara in the early 1990s. Foundational work on this energy was completed by Freedman, He, and Wang in 1994, with their most important result being the proof of the energy's conformal invariance. While a variety of results have built those of Freedman, He, and Wang,
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6

May, Lee Clayton. "A solution-giving transformation for systems of differential equations." Thesis, University of North Texas, 1990. https://digital.library.unt.edu/ark:/67531/metadc332496/.

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7

李達明 and Tad-ming Lee. "Isospectral transformations between soliton-solutions of the Korteweg-de Vries equation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B29866261.

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Lee, Tad-ming. "Isospectral transformations between soliton-solutions of the Korteweg-de Vries equation /." [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1359753X.

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9

Marfai, Frank S. "Hyperbolic transformations on cubics in H²." CSUSB ScholarWorks, 2003. https://scholarworks.lib.csusb.edu/etd-project/142.

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The purpose of this thesis is to study the effects of hyperbolic transformations on the cubic that is determined by locus of centroids of the equilateral triangles in H² whose base coincides with the line y=0, and whose common vertex is at the origin. The derivation of the formulas within this work are based on the Poincaré disk model of H², where H² is understood to mean the hyperbolic plane. The thesis explores the properties of both the untransformed cubic (the original locus of centroids) and the transformed cubic (the original cubic taken under a linear fractional transformation).
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von, Schwerin Erik. "Adaptivity for Stochastic and Partial Differential Equations with Applications to Phase Transformations." Doctoral thesis, KTH, Numerisk Analys och Datalogi, NADA, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4477.

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his work is concentrated on efforts to efficiently compute properties of systems, modelled by differential equations, involving multiple scales. Goal oriented adaptivity is the common approach to all the treated problems. Here the goal of a numerical computation is to approximate a functional of the solution to the differential equation and the numerical method is adapted to this task. The thesis consists of four papers. The first three papers concern the convergence of adaptive algorithms for numerical solution of differential equations; based on a posteriori expansions of global errors in th
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Schwerin, Erik von. "Adaptivity for stochastic and partial differential equations with applications to phase transformations /." Stockholm : Numerisk analys och datalogi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4477.

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12

Tråsdahl, Øystein. "High order methods for partial differential equations: geometry representation and coordinate transformations." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for matematiske fag, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-17077.

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13

Souici, Zobida. "Transformations holomorphiquement projectives des espaces symétriques complexes." Lyon 1, 1988. http://www.theses.fr/1988LYO11758.

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Ce travail est consacre a l'etude des proprietes h-projectives des espaces symetriques complexes. Dans le chapitre i (preliminaire) on rappelle quelques definitions et resultats sur les courbes holomorphiquement planaites, les transformations h-projectives, le tenseur de weyl h-projectif et les espaces symetriques complexes. On construit et on etudie dans le chapitre ii, deux familles de domaines symetriques de l'espace projectif complexe et on demontre que ce sont les seuls domaines symetriques. La construction effectuee au chapitre ii est utilisee, dans le chapitre iii pour obtenir une class
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14

Jones, Paul. "Unitary double products as implementors of Bogolubov transformations." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/14306.

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This thesis is about double product integrals with pseudo rotational generator, and aims to exhibit them as unitary implementors of Bogolubov transformations. We further introduce these concepts in this abstract and describe their roles in the thesis's chapters. The notion of product integral, (simple product integral, not double) is not a new one, but is unfamiliar to many a mathematician. Product integrals were first investigated by Volterra in the nineteenth century. Though often regarded as merely a notation for solutions of differential equations, they provide a priori a multiplicative an
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Della, Porta Francesco M. G. "Selection mechanisms for microstructures and reversible martensitic transformations." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:085f0e90-6d07-4cb6-9bb9-13517de1b65e.

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The work in this thesis is inspired by the fabrication of Zn<sub>45</sub>Au<sub>30</sub>Cu<sub>25</sub>. This is the first alloy undergoing ultra-reversible martensitic transformations and closely satisfying the cofactor conditions, particular conditions of geometric compatibility between phases, which were conjectured to influence reversibility. With the aim of better understanding reversibility, in this thesis we study the martensitic microstructures arising during thermal cycling in Zn<sub>45</sub>Au<sub>30</sub>Cu<sub>25</sub>, which are complex and different in every phase transformation
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Morris, Owen Christopher. "On a class of one-parameter operator semigroups with state space Rn x Zm generated by pseudo-differential operators." Thesis, Swansea University, 2013. https://cronfa.swan.ac.uk/Record/cronfa42779.

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The thesis shows that, under suitable conditions, a pseudo-differential operator, defined on some "nice" set of functions on Rn x Zm, with continuous negative definite symbol q(x,xi,o) extends to a generator of a Feller semigroup. Sections 1-5 are the preliminary sections, these sections discuss some harmonic analysis concerning locally compact Abelian groups. The essence of this thesis are Sections 6-13, which deals with obtaining the estimates required for the fulfilment of the conditions of the Hille-Yosida-Ray theorem.
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Allen, Matthew S. "Seraphs Or Snakes: Consciousness Transformations in a Normal Sample, and Implications for Differential Diagnosis in “Spiritual Emergency”." Connect to this document online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1090266509.

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Thesis (M.A.)--Miami University, Dept. of Psychology, 2004.<br>Title from first page of PDF document. Document formatted into pages; contains [1], iii, 54 p. Includes bibliographical references (p. 33-37).
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Masike, Kakanyo Knowledge. "The required ansatz to construct Lie point transformations and the symmetries of a first-order stochastic differential equation." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/14145.

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In this thesis we demonstrate how to obtain the required ansatz to determine Lie point transformations of evolution-type equations from the contact transformation approach. We indicate that the Lie point transformations of the Fokker-Planck equation (FPE), which is a second-order linear parabolic partial differential equation (PDE), are projectable by using the ansatz. We further obtain the symmetries of a stochastic ordinary differential equation (SODE) which corresponds to those of the FPE. This is possible because there exists a relationship between an SODE and the associated (deterministic
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Abell, K. A. "Analysis and computation of the dynamics of spatially discrete phase transition equations." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.344064.

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Smith, Beverly. "Investigating Thermal Transformations of Ligand-Stabilized Gold Nanoparticles: Influence of the Structural Attributes of the Nanoparticle and Its Environment on Thermal Stability." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19259.

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Ligand-stabilized metal nanoparticles (LSNPs) have garnered significant attention for use in applications including sensing, catalysis, and thin film fabrication. Many uses rely on the size-dependent properties of the metal nanoparticle core. Therefore, preservation of nanoparticle core size is of paramount importance. In other uses, the low processing temperatures afforded by metal LSNPs make them attractive as precursors for conductive thin films. In these distinctly different applications, understanding nanoparticle thermal stability is crucial. A key finding of this research is that na
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Doghraji, Salma. "Caractérisation de la géométrie locale et globale de textures directionnelles par reconstruction d'hypersurfaces et transformations d'espace : application à l'analyse stratigraphique des images sismiques." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0814/document.

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Les textures directionnelles forment la classe particulière des images texturées représentant des hypersurfaces (lignes dermiques, fibres de matériaux, horizons sismiques, etc.). Pour ce type de textures, la reconstruction d'hypersurfaces permet ainsi d'en décrire la géométrie et la structure. À partir du calcul préalable du champ d'orientation, des reconstructions peuvent être obtenues au moyen de la minimisation d'une équation aux dérivées partielles sous contraintes, linéarisée et résolue itérativement de manière optimale dans le domaine de Fourier.Dans ce travail, les reconstructions d'hyp
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22

Komendarczyk, Rafal. "Nodal sets and contact structures." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-05192006-231553/.

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Thesis (Ph. D.)--Mathematics, Georgia Institute of Technology, 2007.<br>Belegradek, Igor, Committee Member ; Ghrist, Robert, Committee Chair ; Harrell, Evans, Committee Member ; Etnyre, John, Committee Member ; Symington, Margaret, Committee Co-Chair.
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Ozdemir, Nilufer A. "The method of moments solution of a nonconformal volume integral equation via the IE-FFT algorithm for electromagnetic scattering from penetrable objects." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1182258230.

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24

Гусинін, Андрій Вячеславович, та Andrii V. Gusynin. "Методи розв’язання нелінійних задач оптимального керування рухом літальних апаратів на основі диференціальних перетворень". Thesis, Національний авіаційний університет, 2021. https://er.nau.edu.ua/handle/NAU/48739.

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Дисертаційна робота присвячена розвитку методів розв’язання нелінійних задач оптимального керування рухом літальних апаратів (ЛА) на основі диференціальних перетворень та їх застосуванню до оптимізації багатоетапного виведення автономних безпілотних літальних апаратів (БЛА) у задані термінальні умови. Розвинута наукова та методична база для забезпечення розв’язання нелінійних задач оптимального керування рухом ЛА на основі математичного апарату диференціальних перетворень. Розвинуті та розроблені нові методи розв’язання нелінійних звичайних диференціальних рівнянь, нелінійних крайових
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Gorgone, Matteo. "Symmetries, Equivalence and Decoupling of First Order PDE's." Doctoral thesis, Università di Catania, 2017. http://hdl.handle.net/10761/3901.

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The present Ph.D. Thesis is concerned with first order PDE's and to the structural conditions allowing for their transformation into an equivalent, and somehow simpler, form. Most of the results are framed in the context of the classical theory of the Lie symmetries of differential equations, and on the analysis of some invariant quantities. The thesis is organized in 5 main sections. The first two Chapters present the basic elements of the Lie theory and some introductory facts about first order PDE's, with special emphasis on quasilinear ones. Chapter 3 is devoted to investigate equivalence
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Silva, Jonatan Floriano da. "Unicidade de hipersuperfÃcies tipo-espaÃo com curvatura mÃdia de ordem superior constante em espaÃo-tempo de Robertson-Walker generalizado." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4119.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Estudaremos, de acordo com Alias e Colares em [11], o problema de unicidade para hipersuperfÃcies tipo-espaÃo com curvatura mÃdia de ordem superior constante em um espaÃo-tempo de Robertson-Walker generalizado (GRW). Em particular, consideraremos a seguinte pergunta: Sob quais condiÃÃes deve uma hipersuperfÃcie tipo-espaÃo compacta com curvatura mÃdia de ordem superior constante em um espaÃo-tempo GRW espacialmente fechado ser uma fatia tipo-espaÃo? Provaremos que isto ocorre, essencialmente, sob a entÃo chamada condiÃÃo de conve
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Valencia, Guevara Julio Cesar 1985. "Uma abordagem via transformada de Fourier para as equações de Navier-Stokes = boa-colocação e comportamento assintótico." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307597.

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Orientador: Lucas Catão de Freitas Ferreira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática, Estatística e Computação Científica<br>Made available in DSpace on 2018-08-19T19:21:09Z (GMT). No. of bitstreams: 1 ValenciaGuevara_JulioCesar_M.pdf: 664823 bytes, checksum: 0c43bba776e592ed44fad0d1bc2f6998 (MD5) Previous issue date: 2012<br>Resumo: Estudamos existência, unicidade, dependência contínua nos dados e comportamento assint ótico de soluções globais das equações de Navier-Stokes (com n >= 3), sob condições de pequenez no dado inicial e na força extern
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Sophocleous, Christodoulos. "Transformation methods in the study of nonlinear partial differential equations." Thesis, University of Nottingham, 1991. http://eprints.nottingham.ac.uk/11133/.

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Transformation methods are perhaps the most powerful analytic tool currently available in the study of nonlinear partial differential equations. Transformations may be classified into two categories: category I includes transformations of the dependent and independent variables of a given partial differential equation and category II additionally includes transformations of the derivatives of the dependent variables. In part I of this thesis our principal attention is focused on transformations of the category I, namely point transformations. We mainly deal with groups of transformations. Thes
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Ghate, Aditée. "The opioid system and differential gene expression." Université Louis Pasteur (Strasbourg) (1971-2008), 2006. http://www.theses.fr/2006STR13019.

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Le système opioïde consiste en trois sous-types de récepteurs opioïdes (delta, mu et kappa) appartenant à la famille des récepteurs couplés aux protéines G, qui sont activés soit par une famille de peptides endogènes, soit par des ligands exogènes. Les récepteurs opioïdes médient les propriétés renforçantes de la morphine et de ses dérivés. L’administration répétée d’opiacés modifie le niveau de transcription de certains gènes dans certaines régions du cerveau de rongeurs, un effet qui serait une des bases moléculaires possibles de la plasticité neuronale associée au comportement addictif. La
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Ngounda, Edgard. "Numerical Laplace transformation methods for integrating linear parabolic partial differential equations." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2735.

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Thesis (MSc (Applied Mathematics))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: In recent years the Laplace inversion method has emerged as a viable alternative method for the numerical solution of PDEs. Effective methods for the numerical inversion are based on the approximation of the Bromwich integral. In this thesis, a numerical study is undertaken to compare the efficiency of the Laplace inversion method with more conventional time integrator methods. Particularly, we consider the method-of-lines based on MATLAB’s ODE15s and the Crank-Nicolson method. Our studies include
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Zhou, Chen. "Genome-informed studies on Penicillium marneffei horizontal gene transfer survey and differential secretomics /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41633672.

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Avelino, Simone Venturi. "Transformada Z." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1887.

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Nesse trabalho utiliza-se a transformada Z como método de resoluções de equações de diferenças, visando modelos matemáticos discretos, com o principal objetivo desenvolver um material didático, em língua portuguesa, tendo em vista que grande parte das referências encontradas estão em língua inglesa. Tem como etapas: definição da transformada Z unilateral, condição de existência, propriedades, transformada Z inversa, incluindo demonstrações, exemplos e exercícios propostos. O material proposto serve de base para o estudo da matemática discreta, direcionado a professores e alunos na disciplina
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Richards, Pamela Jane Childs. "Group analysis of equations arising in ocean acoustics." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/28846.

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Kuběnová, Monika. "Příprava a martenzitické transformace slitin na bázi NiTi." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-233380.

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Cíle této práce jsou: (i) vyhodnocení vlivu Y2O3 kelímku na kontaminaci indukčně tavené NiTi slitiny obohacené niklem, (ii) optimalizace podmínek, při kterých jsou tavby uskutečněny a (iii) získání nových DSC a 3D AP dat o vlivu vodíkové atmosféry na martenzitickou transformaci a na strukturu NiTi slitin obohacené niklem s tvarovou pamětí. Byly provedeny následující experimenty: – Pět taveb bylo navrženo a provedeno tak, aby byla snížena maximální tavící teplota. – Pět přetaveb bylo uskutečněno při teplotě 1500 C s dobou výdrže 2, 10 a 20 minut a při teplotách 1450 C a 1550 C s 20 minutovou do
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Hussein, Mudhafar Saber. "Modelling and analysing adaptive networks : from graph transformation system to ordinary differential equation." Thesis, University of Leicester, 2017. http://hdl.handle.net/2381/40123.

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Online social networks pose particular challenges to designing effective algorithms and protocols. Apart from their distributed nature, their behaviour depends on user behaviour and is difficult to test at a realistic scale. Stochastic graph transformation systems can model the operation of such networks but due to the inherent complexity they are hard to analyse. Techniques such as model checking and simulation, which can be used to verify a range of quantitative properties, do not scale well to systems with large graphs and state spaces. Aiming for an efficient alternative, we propose to der
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Watkinson, Jonathan I. "Characterization of two genes, trehalose-6-phosphate synthase/phosphatase and nucleotide binding protein, shown to be differentially regulated in roots of Cypripedium parviflorum var. pubescens grown with a mycorrhizal fungus Thanatephorus pennatus." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27467.

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The analysis of gene changes associated with formation of the mycorrhizal symbiosis between orchid and fungi could have broad implications for plant pathogen interactions. Fungi associated with North American terrestrial orchids were once included in the pathogenic genus Rhizoctonia. This suggests that orchids are able to overcome or utilize normally pathogenic pathways to establish symbioses. A differential display technique was employed to analyze gene changes in orchid in response to a fungus. Samples of RNA from roots of Cypripedium parviflorum var. pubescens (CyPP) grown in the presenc
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Navarro, Quiles Ana. "COMPUTATIONAL METHODS FOR RANDOM DIFFERENTIAL EQUATIONS: THEORY AND APPLICATIONS." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/98703.

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Desde las contribuciones de Isaac Newton, Gottfried Wilhelm Leibniz, Jacob y Johann Bernoulli en el siglo XVII hasta ahora, las ecuaciones en diferencias y las diferenciales han demostrado su capacidad para modelar satisfactoriamente problemas complejos de gran interés en Ingeniería, Física, Epidemiología, etc. Pero, desde un punto de vista práctico, los parámetros o inputs (condiciones iniciales/frontera, término fuente y/o coeficientes), que aparecen en dichos problemas, son fijados a partir de ciertos datos, los cuales pueden contener un error de medida. Además, pueden existir factores exte
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Abdeljabbar, Alrazi. "Wronskian, Grammian and Pfaffian Solutions to Nonlinear Partial Differential Equations." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/3939.

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It is significantly important to search for exact soliton solutions to nonlinear partial differential equations (PDEs) of mathematical physics. Transforming nonlinear PDEs into bilinear forms using the Hirota differential operators enables us to apply the Wronskian and Pfaffian techniques to search for exact solutions for a (3+1)-dimensional generalized Kadomtsev-Petviashvili (KP) equation with not only constant coefficients but also variable coefficients under a certain constraint (ut + α 1(t)uxxy + 3α 2(t)uxuy)x +α 3 (t)uty -α 4(t)uzz + α 5(t)(ux + α 3(t)uy) = 0. However, bilinear equations
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Flack, Elizabeth F. "The differential characteristics between transformational change experiences and volitional change in recovering substance dependent individuals." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-1/flacke/elizabethflack.pdf.

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Zhang, Jin. "Some innovative numerical approaches for pricing American options." Access electronically, 2007. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080915.125545/index.html.

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Önnegren, Anna. "Feldetektering för diagnos med differentialgeometriska metoder -en implementering i Mathematica." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2519.

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<p>Diagnosis means detection and isolation of faults. A model based diagnosis system is built on a mathematical model of the system. The difficulty when constructing the diagnosis system depends om how the model is formulated. In this report, a method is described that rewrites the model on such a form that the construction of the diagnosis algoritm is easy. The model is transformed by two state space transformations and the result will be a system on state space form where one part of the system becomes easy to supervise. </p><p>The main part of the report describes the procedure to create th
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Garimella, Venkatalakshmi Gayatri. "Théorèmes de Paley-Wiener - opérateurs differentiels invariants sur les groupes de Lie nilpotents." Poitiers, 1997. http://www.theses.fr/1997POIT2277.

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Soient une fonction mesurable sur r#n, et sa transformee de fourier. Une caracterisation de la transformee de fourier de est donnee par le theoreme de paley-wiener pour r#n. Une version faible de ce theoreme dit que si la fonction est mesurable, bornee et a support compact, sa transformee de fourier se prolonge en une fonction holomorphe sur c#n, ce qui permet de conclure que = 0 si est nulle sur un ensemble dont la mesure de plancherel est strictement positive. On generalise cette version du theoreme de paley-wiener aux groupes de lie nilpotents simplement connexes. Cette propriete est conjec
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Meyer, Christoph. "Algorithmic transformation of multi-loop Feynman integrals to a canonical basis." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/18763.

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Die Auswertung von Mehrschleifen-Feynman-Integralen ist eine der größten Herausforderungen bei der Berechnung präziser theoretischer Vorhersagen für die am LHC gemessenen Wirkungsquerschnitte. In den vergangenen Jahren hat sich die Nutzung von Differentialgleichungen bei der Berechnung von Feynman-Integralen als sehr erfolgreich erwiesen. Es wurde dabei beobachtet, dass die von den Feynman-Integralen erfüllte Differentialgleichung oftmals in eine sogenannte kanonische Form transformiert werden kann, welche die Integration der Differentialgleichung mittels iterierter Integrale wesentlich verein
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44

Boșnak, Büke [Verfasser], and Thomas [Akademischer Betreuer] Diez. "Differential transformation of civil society in Turkey : interplay between the EU and historical legacies / Büke Boșnak ; Betreuer: Thomas Diez." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1197695192/34.

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45

Batard, Thomas. "Géométrie différentielle des fibrés vectoriels et algèbres de Clifford appliquées au traitement d'images multicanaux." Phd thesis, Université de La Rochelle, 2009. http://tel.archives-ouvertes.fr/tel-00684250.

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Le sujet de cette thèse est l'apport d'applications du formalisme des algèbres de Clifford au traitement d'images multicanaux. Nous y introduisons également l'utilisation du cadre des fibrés vectoriels en traitement d'image. La Partie 1 est consacrée à la segmentation d'images multicanaux. Nous généralisons l'approche de Di Zenzo pour la détection de contours en construisant des tenseurs métriques adaptés au choix de la segmentation. En utilisant le cadre des fibrés en algèbres de Clifford, nous montrons que le choix d'une segmentation d'une image est directement lié au choix d'une métrique, d
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46

Osman, Abdusslam. "Smoothness of invariant densities for certain classes of dynamical systems." Thesis, Connect to online version, 1996. http://0-wwwlib.umi.com.mercury.concordia.ca/cr/concordia/fullcit?pMQ90889.

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47

Kennah, Erin. "Identification of differentially expressed genes in AHI-1-mediated leukemic transformation in cutaneous t-cell lymphoma." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/962.

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The oncogene Ahi-1 was recently identified through provirus insertional mutagenesis in murine leukemias and lymphomas. Its involvement in human leukemogenesis is demonstrated by gross perturbations in its expression in several leukemic cells lines, particularly in cutaneous T-cell lymphoma (CTCL) cell lines (Hut 78 and Hut 102). Hut 78 is derived from a patient with Sezary syndrome, a common leukemic variant of the human CTCL mycosis fungoides. Aberrant expression of AHI-1 mRNA and protein has been found in CD4⁺CD7⁻ leukemic Sezary cells from patients with Sezary syndrome. Moreover, stable
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48

Zhang, Jianing. "Non-standard backward stochastic differential equations and multiple optimal stopping problems with applications to securities pricing." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2013. http://dx.doi.org/10.18452/16713.

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Zentraler Gegenstand dieser Dissertation ist die Entwicklung von mathematischen Methoden zur Charakterisierung und Implementierung von optimalen Investmentstrategien eines Kleininvestors auf einem Finanzmarkt. Zur Behandlung dieser Probleme ziehen wir als Hauptwerkzeug Stochastische Rückwärts-Differenzialgleichungen (BSDEs) mit nicht-linearen Drifts heran. Diese Nicht-Lineariäten ordnen sie außerhalb der Standardklasse der Lipschitz-stetigen BSDEs ein und treten häufig in finanzmathematischen Kontrollproblemen auf. Wir charakterisieren das optimale Vermögen und die optimale Investmentstrategie
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Brown, Thomas John. "The theory of integrated empathies." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-08242006-120817.

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50

Zeynelgil, Pakize Neval Paşaoğlu Bilender. "Singüler adi diferansiyel denklemler için sınır değer problemleri /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2008. http://tez.sdu.edu.tr/Tezler/TF01252.pdf.

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