Tesis sobre el tema "Nonlocal order"
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Liu, Weian. "Monotone method for nonlocal systems of first order". Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2009/2979/.
Texto completoMa, Ding Henderson Johnny. "Uniqueness implies uniqueness and existence for nonlocal boundary value problems for fourth order differential equations". Waco, Tex. : Baylor University, 2005. http://hdl.handle.net/2104/3577.
Texto completoGray, Michael Jeffery Henderson Johnny L. "Uniqueness implies uniqueness and existence for nonlocal boundary value problems for third order ordinary differential equations". Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4185.
Texto completoTapdigoglu, Ramiz. "Inverse problems for fractional order differential equations". Thesis, La Rochelle, 2019. http://www.theses.fr/2019LAROS004/document.
Texto completoIn this thesis, we are interested in solving some inverse problems for fractional differential equations. An inverse problem is usually ill-posed. The concept of an ill-posed problem is not new. While there is no universal formal definition for inverse problems, Hadamard [1923] defined a problem as being ill-posed if it violates the criteria of a well-posed problem, that is, either existence, uniqueness or continuous dependence on data is no longer true, i.e., arbitrarily small changes in the measurement data lead to indefinitely large changes in the solution. Most difficulties in solving ill-posed problems are caused by solution instability. Inverse problems come into various types, for example, inverse initial problems where initial data are unknown and inverse source problems where the source term is unknown. These unknown terms are to be determined using extra boundary data. Fractional differential equations, on the other hand, become an important tool in modeling many real-life problems and hence there has been growing interest in studying inverse problems of time fractional differential equations. The Non-Integer Order Calculus, traditionally known as Fractional Calculus is the branch of mathematics that tries to interpolate the classical derivatives and integrals and generalizes them for any orders, not necessarily integer order. The advantages of fractional derivatives are that they have a greater degree of flexibility in the model and provide an excellent instrument for the description of the reality. This is because of the fact that the realistic modeling of a physical phenomenon does not depend only on the instant time, but also on the history of the previous time, i.e., calculating timefractional derivative at some time requires all the previous processes with memory and hereditary properties
Lee, Haewon. "Nolinear Evolution Equations and Optimization Problems in Banach Spaces". Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1127498683.
Texto completoDebroux, Noémie. "Mathematical modelling of image processing problems : theoretical studies and applications to joint registration and segmentation". Thesis, Normandie, 2018. http://www.theses.fr/2018NORMIR02/document.
Texto completoIn this thesis, we study and jointly address several important image processing problems including registration that aims at aligning images through a deformation, image segmentation whose goal consists in finding the edges delineating the objects inside an image, and image decomposition closely related to image denoising, and attempting to partition an image into a smoother version of it named cartoon and its complementary oscillatory part called texture, with both local and nonlocal variational approaches. The first proposed model addresses the topology-preserving segmentation-guided registration problem in a variational framework. A second joint segmentation and registration model is introduced, theoretically and numerically studied, then tested on various numerical simulations. The last model presented in this work tries to answer a more specific need expressed by the CEREMA (Centre of analysis and expertise on risks, environment, mobility and planning), namely automatic crack recovery detection on bituminous surface images. Due to the image complexity, a joint fine structure decomposition and segmentation model is proposed to deal with this problem. It is then theoretically and numerically justified and validated on the provided images
Sánchez, de la Peña David Verfasser], Carsten [Akademischer Betreuer] [Honerkamp y Michael M. [Akademischer Betreuer] Scherer. "Competing orders in honeycomb Hubbard models with nonlocal Coulomb interactions : a functional renormalization group approach / David Sánchez de la Peña ; Carsten Honerkamp, Michael M. Scherer". Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1191901653/34.
Texto completoSánchez, de la Peña David [Verfasser], Carsten [Akademischer Betreuer] Honerkamp y Michael M. [Akademischer Betreuer] Scherer. "Competing orders in honeycomb Hubbard models with nonlocal Coulomb interactions : a functional renormalization group approach / David Sánchez de la Peña ; Carsten Honerkamp, Michael M. Scherer". Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1191901653/34.
Texto completoJunior, Vanderley Alves Ferreira. "Equações de quarta ordem na modelagem de oscilações de pontes". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-07072016-165823/.
Texto completoFourth order differential equations appear naturally when modeling oscillations in elastic structures such as those observed in suspension bridges. Two models describing oscillations in the roadway of a bridge are considered. In the one-dimensional model we study finite space blow up of solutions for a class of fourth order differential equations. The results answer a conjecture presented in [F. Gazzola and R. Pavani. Wide oscillation finite time blow up for solutions to nonlinear fourth order differential equations. Arch. Ration. Mech. Anal., 207(2):717752, 2013] and imply the nonexistence of beam oscillation given by traveling wave profile with low speed propagation. In the two-dimensional model we analyze a nonlocal equation for a thin narrow prestressed rectangular plate where the two short edges are hinged and the two long edges are free. We prove existence and uniqueness of weak solution and we study its asymptotic behavior under viscous damping. We also study the stability of simple modes of oscillations which are classified as longitudinal or torsional.
Nguyen, Thi Tuyen. "Comportement en temps long des solutions de quelques équations de Hamilton-Jacobi du premier et second ordre, locales et non-locales, dans des cas non-périodiques". Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S089/document.
Texto completoThe main aim of this thesis is to study large time behavior of unbounded solutions of viscous Hamilton-Jacobi equations in RN in presence of an Ornstein-Uhlenbeck drift. We also consider the same issue for a first order Hamilton-Jacobi equation. In the first case, which is the core of the thesis, we generalize the results obtained by Fujita, Ishii and Loreti (2006) in several directions. The first one is to consider more general operators. We first replace the Laplacian by a general diffusion matrix and then consider a non-local integro-differential operator of fractional Laplacian type. The second kind of extension is to deal with more general Hamiltonians which are merely sublinear
Nachawaty, Abir. "Propriétés électroniques du graphène épitaxié proche de point de neutralité de charge". Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS095/document.
Texto completoLocal and nonlocal magnetoresistances measurements on monolayer graphene grown on the silicon face of silicon carbide (SiC) are reported. The purpose of this work is to understand the physical phenomena appearing close to the charge neutrality point in these monolayers. The first issue to overcome was that graphene is generally strongly doped with electrons due to the interaction with the substrate. The control of the Fermi level has been realised using the corona discharge method. The disorder amplitude has been evaluated in these structures by : (i) fitting the resistivity dependence curve of the Hall coefficient obtained at room temperature; (ii) fitting the temperature dependence of the Hall density for samples that were prepared near the charge neutrality point. All these analyses gave a disorder strength equal to (20 ± 10) meV. It is then shown that for samples with low hole doping, the Hall resistance exhibits an ambipolar behavior as a function of the magnetic field. This behavior is accompanied by the appearance of a local maximum in the longitudinal resistance.This behavior is been explained by a charge transfer model between regions of different doping in graphene. Nevertheless, the microscopic origin of these regions is poorly known. Finally, nonlocal measurements carried out on these samples showed the appearance of important nonlocal resistances which in some cases exceed the corresponding longitudinal resistances. The analysis of these results shows that the contribution of spin current and thermal effects on the occurrence of these nonlocal voltages is neglegible. In contrast, the experimental data are reproduced quite well by a model based on counter-propagating edge states backscattered by the bulk
Modzelewski, Henryk. "Investigation into nonlocal turbulence-closure at higher statistical order". Thesis, 2004. http://hdl.handle.net/2429/16085.
Texto completoScience, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
Edelstein, R. M. "A classification of second order equations via nonlocal transformations". Thesis, 2000. http://hdl.handle.net/10413/3694.
Texto completoThesis (M.Sc.)-University of Natal, Durban, 2000.
Jiang, Jiann Sheng y 江鑑聲. "Nonlocal Effects Induced by Homogenization of 2nd order O.D.E". Thesis, 1994. http://ndltd.ncl.edu.tw/handle/83478361345378900188.
Texto completoJiang, Jian-Sheng y 江鑑聲. "Nonlocal effects induced by homogenization of 2nd order O. D. E". Thesis, 1994. http://ndltd.ncl.edu.tw/handle/04050942536109208140.
Texto completoCHING-YI, YANG y 楊靜儀. "Existence of Solutions of a Nonlinear Nth Order Boundary Value Problem with Nonlocal Conditions". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/rt6nk2.
Texto completo國立臺北教育大學
數學暨資訊教育學系(含數學教育碩士班)
96
We consider the existence of positive solutions of a nonlinear n-th order boundary value problem. In particular, we establish the existence of at least one positive solution if f is “superlinear” by applying the fixed point theorem in cones due to Krasnoselkiˇı and Guo.