Дисертації з теми "Neumann boundary control problems"
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Pfefferer, Johannes [Verfasser], Thomas [Akademischer Betreuer] Apel, and Arnd [Akademischer Betreuer] Rösch. "Numerical analysis for elliptic Neumann boundary control problems on polygonal domains / Johannes Pfefferer. Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften. Gutachter: Thomas Apel ; Arnd Rösch. Betreuer: Thomas Apel." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2014. http://d-nb.info/1054706824/34.
Повний текст джерелаLu, Xing. "La contrôlabilité frontière exacte et la synchronisation frontière exacte pour un système couplé d’équations des ondes avec des contrôles frontières de Neumann et des contrôles frontières couplés de Robin." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAD013/document.
Повний текст джерелаThis thesis studies the widespread natural phenomenon of synchronization, which was first observed by Huygens en 1665. On the basis of the results on the exact boundary controllability, for a coupled system of wave equations with Neumann boundary controls, we consider its exact boundary synchronization (by groups), as well as the determination of the state of synchronization. Then, we consider the exact boundary controllability and the exact boundary synchronization (by groups) for the coupled system with coupled Robin boundary controls. Due to difficulties from the lack of regularity of the solution, we have to face a bigger challenge. In order to overcome this difficulty, we take advantage of the regularity results for the mixed problem with Neumann boundary conditions (Lasiecka and Triggiani) to discuss the exact boundary controllability, and by the method of compact perturbation, to obtain the non-exact controllability for the system
Winkler, Max [Verfasser], Thomas [Akademischer Betreuer] Apel, Olaf [Akademischer Betreuer] Steinbach, and Roland [Akademischer Betreuer] Herzog. "Finite Element Error Analysis for Neumann Boundary Control Problems on Polygonal and Polyhedral Domains / Max Winkler. Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften. Betreuer: Thomas Apel. Gutachter: Thomas Apel ; Olaf Steinbach ; Roland Herzog." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2015. http://d-nb.info/1077773129/34.
Повний текст джерелаAlsaedy, Ammar, and Nikolai Tarkhanov. "Normally solvable nonlinear boundary value problems." Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2013/6507/.
Повний текст джерелаYang, Xue. "Neumann problems for second order elliptic operators with singular coefficients." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/neumann-problems-for-second-order-elliptic-operators-with-singular-coefficients(2e65b780-df58-4429-89df-6d87777843c8).html.
Повний текст джерелаOrey, Maria de Serpa Salema Reis de. "Factorization of elliptic boundary value problems by invariant embedding and application to overdetermined problems." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/8677.
Повний текст джерелаThe purpose of this thesis is the factorization of elliptic boundary value problems defined in cylindrical domains, in a system of decoupled first order initial value problems. We begin with the Poisson equation with mixed boundary conditions, and use the method of invariant embedding: we embed our initial problem in a family of similar problems, defined in sub-domains of the initial domain, with a moving boundary, and an additional condition in the moving boundary. This factorization is inspired by the technique of invariant temporal embedding used in Control Theory when computing the optimal feedback, for, in fact, as we show, our initial problem may be defined as an optimal control problem. The factorization thus obtained may be regarded as a generalized block Gauss LU factorization. From this procedure emerges an operator that can be either the Dirichlet-to-Neumann or the Neumann-to-Dirichlet operator, depending on which boundary data is given on the moving boundary. In any case this operator verifies a Riccati equation that is studied directly by using an Yosida regularization. Then we extend the former results to more general strongly elliptic operators. We also obtain a QR type factorization of the initial problem, where Q is an orthogonal operator and R is an upper triangular operator. This is related to a least mean squares formulation of the boundary value problem. In addition, we obtain the factorization of overdetermined boundary value problems, when we consider an additional Neumann boundary condition: if this data is not compatible with the initial data, then the problem has no solution. In order to solve it, we introduce a perturbation in the original problem and minimize the norm of this perturbation, under the hypothesis of existence of solution. We deduce the normal equations for the overdetermined problem and, as before, we apply the method of invariant embedding to factorize the normal equations in a system of decoupled first order initial value problems.
López, Ríos Juan Carlos. "Water-wave equations and free boundary problems: inverse problems and control." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/135179.
Повний текст джерелаEn este trabajo se aborda el problema de existencia de algunos tipos de soluciones para las ecuaciones de ondas en el agua así como la relación que existe entre estas soluciones y la forma de un fondo impermeable sobre la que se desliza el fluido. Empezamos por describir las ecuaciones que modelan el fenómeno físico a partir de las leyes de conservación; el modelo general de las ecuaciones de ondas en el agua, escrito para la restricción de la velocidad potencial a la superficie libre, es \begin{equation*} \left\{ \begin{aligned} &\partial_t\zeta-G(\zeta,b)\psi=0, \\ &\partial_t\psi+g\zeta+\frac{1}{2}|\nabla_X\psi|^2-\frac{1}{2(1+|\nabla_X\zeta|^2)}(G(\zeta,b)\psi+\nabla_X\zeta\cdot\nabla_X\psi)^2=0, \end{aligned} \right. \end{equation*} donde $G=G(\zeta,b)\psi$ es el operador Dirichlet-Neumann, el cual contiene la información del fondo $b$, \begin{equation*} G(\zeta,b)\psi:=-\sqrt{1+|\nabla_X\zeta|^2}\partial_n\phi|_{y=\zeta(t,X)}, \end{equation*} y \begin{equation*} \left\{ \begin{array}{rl} & \Delta\phi=0, \quad \R\times(b,\zeta), \\ & \phi|_{y=\zeta}=\psi, \quad \partial_n \phi|_{y=b(X)}=0. \end{array} \right. \end{equation*} Después de describir las condiciones para un teorema de existencia y unicidad de soluciones de las ecuaciones de ondas en el agua, en espacios de Sobolev, nos preguntamos sobre el mínimo de datos necesarios, sobre la superficie libre, para identificar el fondo de manera única. Por la relación que existe entre el operador Dirichlet-Neumann y la velocidad dentro del fluido y utilizando la propiedad de continuación única de las funciones armónicas hemos probado que basta conocer el perfil, la velocidad potencial y la velocidad normal en un instante de tiempo dado y un abierto de $\R$, aún cuando nuestro sistema es de evolución. En la segunda parte se estudia la existencia de soluciones en forma de salto hidráulico para las ecuaciones estacionarias de ondas en el agua, en dimensión dos y su relación con la velocidad aguas arriba, caracterizada por un parámetro adimensional, llamado el número de Froude, $F$, como consecuencia de la existencia de ramas de bifurcación de la solución trivial para el problema \begin{equation*} \mathcal{F}(\eta,F)=\eta+F\widetilde{\psi}_{y^{\prime }}+\frac{\epsilon}{2}(% \widetilde{\psi}_{x^{\prime }}^2+\widetilde{\psi}_{y^{\prime }}^2)-\epsilon^2\eta_x\widetilde{\psi}_{x^{\prime }}\widetilde{\psi}% _{y^{\prime }}+\frac{\epsilon^3}{2}\eta_x^2\widetilde{\psi}_{y^{\prime }}^2; \end{equation*} donde \begin{equation*} \left\{ \begin{aligned} &\Delta\widetilde{\psi}=\epsilon G, && (-L,L)\times(0,1), \\ &\widetilde{\psi}_{x'}=0, && x'=-L,L, \\ &\widetilde{\psi}=0, && y'=0, \\ &\widetilde{\psi}=-F\eta, && y'=1. \end{aligned} \right. \end{equation*}
PERROTTA, Antea. "Differential Formulation coupled to the Dirichlet-to-Neumann operator for scattering problems." Doctoral thesis, Università degli studi di Cassino, 2020. http://hdl.handle.net/11580/75845.
Повний текст джерелаKulkarni, Mandar S. "Multi-coefficient Dirichlet Neumann type elliptic inverse problems with application to reflection seismology." Birmingham, Ala. : University of Alabama at Birmingham, 2009. https://www.mhsl.uab.edu/dt/2010r/kulkarni.pdf.
Повний текст джерелаTitle from PDF t.p. (viewed July 21, 2010). Additional advisors: Thomas Jannett, Tsun-Zee Mai, S. S. Ravindran, Günter Stolz, Gilbert Weinstein. Includes bibliographical references (p. 59-64).
Kamyad, A. V. "Boundary control problems for the multi-dimensional diffusion equation." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382023.
Повний текст джерелаWahbi, Wassim. "Contrôle stochastique sur les réseaux." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLED072.
Повний текст джерелаThis thesis consists of three parts which deal with quasi linear parabolic PDE on a junction, stochastic diffusion on a junction and stochastic control on a junction with control at the junction point. We begin in the first Chapter by introducing and studying a new class of non degenerate quasi linear parabolic PDE on a junction, satisfying a Neumann (or Kirchoff) non linear and non dynamical condition at the junction point. We prove the existence and the uniqueness of a classical solution. The main motivation of studying this new mathematical object is the analysis of stochastic control problems with control at the junction point, and the characterization of the value function of the problem in terms of Hamilton Jacobi Bellman equations. For this end, in the second Chapter we give a proof of the existence of a diffusion on a junction. The process is characterized by its local time at the junction point, whose quadratic approximation is centrally related to the ellipticty assumption of the second order terms around the junction point.We then provide an It's formula for this process. Thanks to the previous results, in the last Chapter we study a problem of stochastic control on a junction, with control at the junction point. The set of controls is the set of the probability measures (admissible rules) satisfying a martingale problem. We prove the compactness of the admissible rules and the dynamic programming principle
Goldberg, H., and F. Tröltzsch. "On a SQP-multigrid technique for nonlinear parabolic boundary control problems." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801210.
Повний текст джерелаFernando, Chathuri [Verfasser]. "Optimal Control of Free Boundary Value Problems in Thermoelasticity / Chathuri Fernando." München : Verlag Dr. Hut, 2018. http://d-nb.info/1164294075/34.
Повний текст джерелаBenincasa, Tommaso <1981>. "Analysis and optimal control for the phase-field transition system with non-homogeneous Cauchy-Neumann boundary conditions." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3066/1/benincasa_tommaso_tesi.pdf.
Повний текст джерелаBenincasa, Tommaso <1981>. "Analysis and optimal control for the phase-field transition system with non-homogeneous Cauchy-Neumann boundary conditions." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3066/.
Повний текст джерелаLakhany, Asif. "Finite element recovery techniques in adaptive error control." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262505.
Повний текст джерелаBrancati, Alessandro. "Boundary element method for fast solution of acoustic problems : active and passive noise control." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6139.
Повний текст джерелаChierici, Andrea <1992>. "Mathematical and Numerical Models for Boundary Optimal Control Problems Applied to Fluid-Structure Interaction." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9856/1/thesis_chierici.pdf.
Повний текст джерелаCoco, Armando. "Finite-Difference Ghost-Cell Multigrid Methods for Elliptic problems with Mixed Boundary Conditions and Discontinuous Coefficients." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/1107.
Повний текст джерелаZhang, Jindong. "Nonlinear dynamic analysis and optimal control of shallow shells by field-boundary-element approach." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/32961.
Повний текст джерелаSchuhmann, Patrick [Verfasser]. "On some Two-Dimensional Singular Stochastic Control Problems and their Free-Boundary Analysis / Patrick Schuhmann." Bielefeld : Universitätsbibliothek Bielefeld, 2021. http://d-nb.info/1238780865/34.
Повний текст джерелаO'Donoghue, Padraic Eimear. "Boundary integral equation approach to nonlinear response control of large space structures : alternating technique applied to multiple flaws in three dimensional bodies." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/20685.
Повний текст джерелаJohn, Christian [Verfasser], and Fredi [Akademischer Betreuer] Tröltzsch. "Optimal Dirichlet boundary control problems of high-lift configurations with control and integral state constraints / Christian John. Betreuer: Fredi Tröltzsch." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://d-nb.info/1014971624/34.
Повний текст джерелаGao, Guangyue. "Some Controllability and Stabilization Problems of Surface Waves on Water with Surface tension." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64377.
Повний текст джерелаPh. D.
Frenander, Hannes. "High-order finite difference approximations for hyperbolic problems : multiple penalties and non-reflecting boundary conditions." Doctoral thesis, Linköpings universitet, Beräkningsmatematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134127.
Повний текст джерелаRaymond, Jean-Pierre, and Fredi Tröltzsch. "Second Order Sufficient Optimality Conditions for Nonlinear Parabolic Control Problems with State Constraints." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801014.
Повний текст джерелаTröltzsch, F. "Lipschitz stability of solutions to linear-quadratic parabolic control problems with respect to perturbations." Universitätsbibliothek Chemnitz, 1998. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-199801229.
Повний текст джерелаSchmitt, Johann Michael [Verfasser]. "Optimal Control of Initial-Boundary Value Problems for Hyperbolic Balance Laws with Switching Controls and State Constraints / Johann Michael Schmitt." München : Verlag Dr. Hut, 2019. http://d-nb.info/1188516450/34.
Повний текст джерелаKasnakoglu, Cosku. "Reduced order modeling, nonlinear analysis and control methods for flow control problems." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195629380.
Повний текст джерелаHegarty-Cremer, Solene G. "Spatial control and cell guidance in evolving biological tissues." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207246/1/Solene_Hegarty-Cremer_Thesis.pdf.
Повний текст джерелаAlves, Michele de Oliveira. "Um problema de extensão relacionado a raiz quadrada do Laplaciano com condição de fronteira de Neumann." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/45/45132/tde-19012011-231320/.
Повний текст джерелаIn this work we define the non-local operator, square root of the Laplacian with Neumann boundary condition, using the method of harmonic extension. The study was done with the aid of Fourier series in bounded domains, as the interval, the square and the ball. Subsequently, we apply our study, the nonlinear elliptic problems involving non-local operator square root of the Laplacian with Neumann boundary condition.
CISTERNINO, MARCO. "A parallel second order Cartesian method for elliptic interface problems and its application to tumor growth model." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2497156.
Повний текст джерелаCisternino, Marco. "A parallel second order Cartesian method for elliptic interface problems and its application to tumor growth model." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2012. http://tel.archives-ouvertes.fr/tel-00690743.
Повний текст джерелаRogovs, Sergejs [Verfasser], Thomas [Akademischer Betreuer] Apel, Thomas [Gutachter] Apel, Olaf [Gutachter] Steinbach, and Dmitriy [Gutachter] Leykekhman. "Pointwise Error Estimates for Boundary Control Problems on Polygonal Domains / Sergejs Rogovs ; Gutachter: Thomas Apel, Olaf Steinbach, Dmitriy Leykekhman ; Akademischer Betreuer: Thomas Apel ; Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2018. http://d-nb.info/1193497329/34.
Повний текст джерелаRogovs, Sergejs [Verfasser], Thomas [Akademischer Betreuer] Apel, Thomas Gutachter] Apel, Olaf [Gutachter] [Steinbach, and Dmitriy [Gutachter] Leykekhman. "Pointwise Error Estimates for Boundary Control Problems on Polygonal Domains / Sergejs Rogovs ; Gutachter: Thomas Apel, Olaf Steinbach, Dmitriy Leykekhman ; Akademischer Betreuer: Thomas Apel ; Universität der Bundeswehr München, Fakultät für Bauingenieurwesen und Umweltwissenschaften." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2018. http://nbn-resolving.de/urn:nbn:de:bvb:706-6144.
Повний текст джерелаCekić, Mihajlo. "The Calderón problem for connections." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267829.
Повний текст джерелаSantos, Simão Pedro Silva. "Calculus of variations of Herglotz type." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22503.
Повний текст джерелаWe consider several problems based on Herglotz’s generalized variational problem. We dedicate two chapters to extensions on Herglotz’s generalized variational problem to higher-order and first-order problems with time delay, using a variational approach. In the last four chapters, we rewrite Herglotz's type problems in the optimal control form and use an optimal control approach. We prove generalized higher- order Euler-Lagrange equations, first without and then with time delay; higher-order natural boundary conditions; Noether's first theorem for the first-order problem of Herglotz with time delay; Noether's first theorem for higher-order problems of Herglotz without and with time delay; and existence of Noether currents as a version of Noether's second theorem of optimal control.
Consideramos vários problemas com base no problema variacional generalizado de Herglotz. Dois capítulos são dedicados à extensão do problema variacional generalizado de Herglotz para ordem superior e para problemas de primeira ordem com atraso no tempo, utilizando uma abordagem variacional. Nos últimos quatro capítulos, reescrevemos os problemas de Herglotz na forma do controlo ótimo e usamos essa abordagem. Demonstramos equações generalizadas de Euler-Lagrange de ordem superior, inicialmente sem e depois com atraso no tempo; condições de fronteira de ordem superior; o primeiro teorema de Noether para o problema de Herglotz de primeira ordem com atraso no tempo; o primeiro teorema de Noether para problemas de ordem superior de Herglotz sem e com atraso no tempo; e a existência de leis de conservação de Noether numa versão do segundo teorema de Noether do controlo ótimo.
Chowdhury, Sudipto. "Finite Element Analysis of Interior and Boundary Control Problems." Thesis, 2016. http://etd.iisc.ernet.in/2005/3717.
Повний текст джерелаSardar, Bidhan Chandra. "Study of Optimal Control Problems in a Domain with Rugose Boundary and Homogenization." Thesis, 2016. http://hdl.handle.net/2005/2883.
Повний текст джерелаJeng, Bor-Wen, and 鄭博文. "Exploiting Symmetries for Semilinear Elliptic Problems with Neumann Boundary Conditions." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/84015655255280839989.
Повний текст джерела國立中興大學
應用數學系
85
We exploit symmetries in certain semilinear elliptic eigenvalue problems withNeumann boundary conditions for the continuation of solution curves. We showthat symmetry makes the problem decomposable into small ones, and thediscretization matrix obtained via central differences associated to theLaplacian is similar to a symmetric one. Furthermore, the discrete problemspreserve some basic properties on eigenvalues of the continuous problems.Thus the continuation-Lanczos algorithm can be adapted to trace the solutioncurves of the reduced problems. Sample numerical results are reported.
Lippi, Edoardo Proietti. "Nonlocal Neuman boundary conditions: properties and problems." Doctoral thesis, 2022. http://hdl.handle.net/2158/1270261.
Повний текст джерела"Boundary control of quasi-linear hyperbolic initial boundary-value problems." Université catholique de Louvain, 2004. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-09242004-170922/.
Повний текст джерелаRavi, Prakash *. "Homogenization of Optimal Control Problems in a Domain with Oscillating Boundary." Thesis, 2013. http://hdl.handle.net/2005/2807.
Повний текст джерелаKrumbiegel, Klaus [Verfasser]. "Numerical concepts and error analysis for elliptic Neumann control problems with pointwise state and control constraints / von Klaus Krumbiegel." 2009. http://d-nb.info/994128479/34.
Повний текст джерелаCOKER, ESTELLE MATHILDA. "SEQUENTIAL GRADIENT-RESTORATION ALGORITHM FOR OPTIMAL CONTROL PROBLEMS WITH CONTROL INEQUALITY CONSTRAINTS AND GENERAL BOUNDARY CONDITIONS." Thesis, 1985. http://hdl.handle.net/1911/15889.
Повний текст джерелаYan, Yan. "Smooth and Robust Solutions for Dirichlet Boundary Control of Fluid-Solid Conjugate Heat Transfer Problems." Thesis, 2015. https://doi.org/10.7916/D8H70DNK.
Повний текст джерела(9838208), David Sturgess. "Using genetic and evolutionary algorithms to solve boundary control problems in soil-water-plant interaction." Thesis, 2002. https://figshare.com/articles/thesis/Using_genetic_and_evolutionary_algorithms_to_solve_boundary_control_problems_in_soil-water-plant_interaction/13429310.
Повний текст джерелаKo, Shuh-Hung. "Comparison of gradient-restoration algorithms for optimal control problems with nondifferential constraints and general boundary conditions." Thesis, 1994. http://hdl.handle.net/1911/13854.
Повний текст джерелаSchwarz, Christian [Verfasser]. "Computation of confluent hypergeometric functions and application to parabolic boundary control problems / vorgelegt von Christian Schwarz." 2004. http://d-nb.info/971747660/34.
Повний текст джерелаBai, Xiaoli. "Modified Chebyshev-Picard Iteration Methods for Solution of Initial Value and Boundary Value Problems." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8240.
Повний текст джерела