Tesis sobre el tema "Linear and non-linear problems"
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Minne, Andreas. "Non-linear Free Boundary Problems". Doctoral thesis, KTH, Matematik (Avd.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178110.
Texto completoQC 20151210
Wokiyi, Dennis. "Non-linear inverse geothermal problems". Licentiate thesis, Linköpings universitet, Matematik och tillämpad matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-143031.
Texto completoEdlund, Ove. "Solution of linear programming and non-linear regression problems using linear M-estimation methods /". Luleå, 1999. http://epubl.luth.se/1402-1544/1999/17/index.html.
Texto completoToutip, Wattana. "The dual reciprocity boundary element method for linear and non-linear problems". Thesis, University of Hertfordshire, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369302.
Texto completoMcKay, Barry. "Wrinkling problems for non-linear elastic membranes". Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307187.
Texto completoBaek, Kwang-Hyun. "Non-linear optimisation problems in active control". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243131.
Texto completoGarcia, Francisco Javier. "THREE NON-LINEAR PROBLEMS ON NORMED SPACES". Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1171042141.
Texto completoSorour, Ahmed El-Sayed. "Some problems in non-linear open loop systems". Thesis, University of Kent, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279420.
Texto completoShikongo, Albert. "Numerical Treatment of Non-Linear singular pertubation problems". Thesis, Online access, 2007. http://etd.uwc.ac.za/usrfiles/modules/etd/docs/etd_gen8Srv25Nme4_3831_1257936459.pdf.
Texto completoRuggeri, Felipe. "A higher order time domain panel method for linear and weakly non linear seakeeping problems". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-09122016-074844/.
Texto completoEssa tese aborda o desenvolvimento de um método de Rankine de ordem alta no domínio do tempo (TDRPM) para o estudo de problemas lineares e fracamente não lineares, incluindo o efeito de corrente, envolvendo sistemas flutuantes. O método de ordem alta desenvolvido considera a geometria do corpo como descrita pelo padrão Non-uniform Rational Basis Spline (NURBS), que está disponível em diverso0s softwares de Computed Aided Design (CAD) disponíveis, sendo as diversas funções (potencial de velocidades, elevação da superfície-livre e outros) descritos usando B-splines de grau arbitrário. O problema é formulado considerando interações onda-corrente-estrutura para efeitos de até segunda ordem, os de ordem superior sendo calculados considerando as interações somente dos termos de ordem inferior. Para garantir a estabilidade numérica, o problema de contorno com valor inicial é formulado0 com relação ao potencial de velocidade e de parcela local do potencial de acelerações, este para garantir cálculos precisos da pressão dinâmica. O problema de ordem zero é resolvido usando a linearização de corpo-duplo ao invés da linearização de Neumman-Kelvin para permitir a análise de corpos rombudos, o que requer o cálculo de termos-m de grande complexidade. O método adota fontes de Rankine como funções de Green, que são integradas através de quadratura de Gauss-Legendre no domínio todo, exceto com relação aos termos de auto-influência que adotasm um procedimento de dessingularização. O método numérico é inicialmente verificado considerando corpos de geometria simplificada (esfera e cilindro), considerando efeitos de primeira e segunda ordens, com e sem corrente. As derivadas do potencial de velocidade são verificadas comparando os termos-m obtidos numericamente com soluções analíticas disponíveis para a esfera em fluído infinito. As forças de deriva média e dupla-frequência são calculadas para estruturas fixas e flutuantes, sendo as funções calculadas (elevação da superfície, campo de velocidade) comparadas com resultados disponíveis na literatura, incluindo o movimento da esfera flutuante sob a ação de corrente e ondas. São também estudados dois casos de aplicação prática, a resposta de segunda ordem de uma plataforma semi-submersível e o efeito de wave-drift damping para o ângulo de equilíbrio de uma plataforma FPSO ancorada através de sistema turred. No caso da semi-submersível, os ensaios foram projetados e realizados em tanque de provas.
Jonsson, Karl. "Two Problems in non-linear PDE’s with Phase Transitions". Licentiate thesis, KTH, Matematik (Avd.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223562.
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Yagoob, Muhammad Moeen. "Computationally efficient algorithms for non-linear target tracking problems". Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499109.
Texto completoSustar, Tomaz. "A solution approach to non-linear multi-field problems". Thesis, Swansea University, 2002. https://cronfa.swan.ac.uk/Record/cronfa42573.
Texto completoRay, Aparna. "Some Non-linear Problems of thin Plates and Shells". Thesis, University of North Bengal, 1998. http://hdl.handle.net/123456789/1614.
Texto completoMayger, E. M. "Superspace calculations and techniques for non-linear field theories". Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384546.
Texto completoBai, Xianglan. "Non-Krylov Non-iterative Subspace Methods For Linear Discrete Ill-posed Problems". Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1627042947894919.
Texto completoKuang, Jinbo. "Finite element analysis of transient non-linear coupled field problems". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0016/NQ53723.pdf.
Texto completoDrexler, Michael. "Newton's method as a global solver for non-linear problems". Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360197.
Texto completoAbdulaziz, Ali Ahmed. "Neural-based controller development for solving non-linear control problems". Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260976.
Texto completoHan, F. S. "Non-linear free surface problems using the boundary element method". Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378300.
Texto completoLoines, J. "Boundary integral equation methods for problems in non-linear magnetostatics". Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37768.
Texto completoJohnson, I. W. "Moving finite elements for diffusion problems". Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373470.
Texto completoAl-Edani, Ameen Ahmed Nassar. "Efficient fracture mechanics programming system for linear and non-linear problems using finite-element and boundary-element methods". Thesis, Cranfield University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276169.
Texto completoGreven, Sonja. "Non-standard problems in inference for additive and linear mixed models". Göttingen Cuvillier, 2007.
Buscar texto completoVogt, Pascal. "Catalytic superprocesses, collision local times and non-linear boundary value problems". Thesis, University of Bath, 2003. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426145.
Texto completoKumar, Manish. "Converting some global optimization problems to mixed integer linear problems using piecewise linear approximations". Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Kumar_09007dcc803c8e68.pdf.
Texto completoVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed December 7, 2007) Includes bibliographical references (p. 28).
Tu, Zhiqi. "Enhancements of the Non-linear Knapsack Cryptosystem". Thesis, University of Canterbury. Computer Science and Software Engineering, 2006. http://hdl.handle.net/10092/1080.
Texto completoYaakub, Abdul Razak Bin. "Computer solution of non-linear integration formula for solving initial value problems". Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/25381.
Texto completoCroxton, Keely L., Bernard Gendon y Thomas L. Magnanti. "A Comparison of Mixed-Integer Programming Models for Non-Convex Piecewise Linear Cost Minimization Problems". Massachusetts Institute of Technology, Operations Research Center, 2002. http://hdl.handle.net/1721.1/5233.
Texto completoEspinoza, García Juan Carlos. "Robust optimization for discrete structures and non-linear impact of uncertainty". Thesis, Cergy-Pontoise, Ecole supérieure des sciences économiques et commerciales, 2017. http://www.theses.fr/2017ESEC0004/document.
Texto completoWe address decision problems under uncertain information with non-linear structures of parameter variation, and devise solution methods in the spirit of Bertsimas and Sim’s Γ-Robustness approach. Furthermore, although the non-linear impact of uncertainty often introduces discrete structures to the problem, for tractability, we provide the conditions under which the complexity class of the nominal model is preserved for the robust counterpart. We extend the Γ-Robustness approach in three avenues. First, we propose a generic case of non-linear impact of parameter variation, and model it with a piecewise linear approximation of the impact function. We show that the subproblem of determining the worst-case variation can be dualized despite the discrete structure of the piece-wise function. Next, we built a robust model for the location of new housing where the non-linearity is introduced by a choice model, and propose a solution combining Γ-Robustness with a scenario-based approach. We show that the subproblem is tractable and leads to a linear formulation of the robust problem. Finally, we model the demand in a Location Problem through a Poisson Process inducing, when demands are uncertain, non-linear structures of parameter variation. We propose the concept of Nested Uncertainty Budgets to manage uncertainty in a tractable way through a hierarchical structure and, under this framework, obtain a subproblem that includes both continuous and discrete deviation variables
Ang, W. T. "Some crack problems in linear elasticity /". Title page, table of contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09pha581.pdf.
Texto completoHigham, N. J. "Nearness problems in numerical linear algebra". Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374580.
Texto completoAustin, D. M. "On two problems in linear elasticity". Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378026.
Texto completoYodpinyanee, Anak. "Sub-linear algorithms for graph problems". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120411.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 189-199).
In the face of massive data sets, classical algorithmic models, where the algorithm reads the entire input, performs a full computation, then reports the entire output, are rendered infeasible. To handle these data sets, alternative algorithmic models are suggested to solve problems under the restricted, namely sub-linear, resources such as time, memory or randomness. This thesis aims at addressing these limitations on graph problems and combinatorial optimization problems through a number of different models. First, we consider the graph spanner problem in the local computation algorithm (LCA) model. A graph spanner is a subgraph of the input graph that preserves all pairwise distances up to a small multiplicative stretch. Given a query edge from the input graph, the LCA explores a sub-linear portion of the input graph, then decides whether to include this edge in its spanner or not - the answers to all edge queries constitute the output of the LCA. We provide the first LCA constructions for 3 and 5-spanners of general graphs with almost optimal trade-offs between spanner sizes and stretches, and for fixed-stretch spanners of low maximum-degree graphs. Next, we study the set cover problem in the oracle access model. The algorithm accesses a sub-linear portion of the input set system by probing for elements in a set, and for sets containing an element, then computes an approximate minimum set cover: a collection of an approximately-minimum number of sets whose union includes all elements. We provide probe-efficient algorithms for set cover, and complement our results with almost tight lower bound constructions. We further extend our study to the LP-relaxation variants and to the streaming setting, obtaining the first streaming results for the fractional set cover problem. Lastly, we design local-access generators for a collection of fundamental random graph models. We demonstrate how to generate graphs according to the desired probability distribution in an on-the-fly fashion. Our algorithms receive probes about arbitrary parts of the input graph, then construct just enough of the graph to answer these probes, using only polylogarithmic time, additional space and random bits per probe. We also provide the first implementation of random neighbor probes, which is a basic algorithmic building block with applications in various huge graph models.
by Anak Yodpinyanee.
Ph. D.
Chonev, Ventsislav. "Reachability problems for linear dynamical systems". Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:e73d1a5b-edce-4e1d-a593-fd8df7e2a817.
Texto completoJulius, Hayden. "Nonstandard solutions of linear preserver problems". Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1626101272174819.
Texto completoSchülke, Christophe. "Statistical physics of linear and bilinear inference problems". Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC058.
Texto completoThe recent development of compressed sensing has led to spectacular advances in the under standing of sparse linear estimation problems as well as in algorithms to solve them. It has also triggered anew wave of developments in the related fields of generalized linear and bilinear inference problems. These problems have in common that they combine a linear mixing step and a nonlinear, probabilistic sensing step, producing indirect measurements of a signal of interest. Such a setting arises in problems such as medical or astronomical Imaging. The aim of this thesis is to propose efficient algorithms for this class of problems and to perform their theoretical analysis. To this end, it uses belief propagation, thanks to which high-dimensional distributions can be sampled efficiently, thus making a bayesian approach to inference tractable. The resulting algorithms undergo phase transitions that can be analyzed using the replica method, initially developed in statistical physics of disordered systems. The analysis reveals phases in which inference is easy, hard or impossible, corresponding to different energy landscapes of the problem. The main contributions of this thesis can be divided into three categories. First, the application of known algorithms to concrete problems : community detection, superposition codes and an innovative imaging system. Second, a new, efficient message-passing algorithm for blind sensor calibration, that could be used in signal processing for a large class of measurement systems. Third, a theoretical analysis of achievable performances in matrix compressed sensing and of instabilities in bayesian bilinear inference algorithms
Placidi, Luca. "Solution of St.-Venant's and Almansi-Michell's Problems". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35451.
Texto completoMaster of Science
Haught, Damon. "On the Existence of Solutions to Discrete, Two Point, Non-linear Boundary Value Problems". Youngstown State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1299522079.
Texto completo羅恩妮 y Yan-nei Law. "Some additive preserver problems". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31222912.
Texto completoLaw, Yan-nei. "Some additive preserver problems /". Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22054820.
Texto completoStoth, Barbara E. E. Jiang Song. "On periodic solutions of linear thermostat problems". Bonn : [s.n.], 1989. http://catalog.hathitrust.org/api/volumes/oclc/19990668.html.
Texto completoTsang, Siu Chung. "Preconditioners for linear parabolic optimal control problems". HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/464.
Texto completoJamieson, Alan C. "Linear-time algorithms for edge-based problems". Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1193079463/.
Texto completo馮漢國 y Hon-kwok Fung. "Some linear preserver problems in system theory". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B3121227X.
Texto completoNoble, Raymond Keith. "Some problems associated with linear differential operators". Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238160.
Texto completoGANDOLPHO, ANDRE ALVES. "METHODOLOGY FOR SOLVING FUZZY LINEAR PROGRAMMING PROBLEMS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8070@1.
Texto completoEsta tese propõe uma metodologia para obter uma solução para problemas de programação linear fuzzy. A metodologia aqui descrita apresenta um conjunto de soluções em que tanto os valores das variáveis quanto o valor ótimo para a função de custo, ou função objetivo, possuem uma faixa de valores possíveis. Assim, é possível fornecer um conjunto de soluções factíveis que atendam a diferentes cenários, além de fornecer ao tomador de decisões uma ferramenta de análise mais útil, permitindo que sejam analisadas outras soluções possíveis antes de se escolher uma solução em particular. O problema é resolvido de forma iterativa, tornando mais simples e de fácil aplicação a metodologia desenvolvida.
This work proposes an approach to obtain a solution to linear fuzzy programming problems. The approach described here presents a solution set in where both the variables values and the cost function optimun value to have an associated membership function. Thus, it is possible to provided not only a feasible solution set applicable to different scenarios but also to supply the decision maker with a more powerful tool for the analysis of other possible solutions. The problem is solved in an interactive way, so that the developed is approach easily applicable and simple to handle
Spence, Euan Alastair. "Boundary value problems for linear elliptic PDEs". Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609476.
Texto completoChen, Shang. "Reachability problems for systems with linear dynamics". Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/22331.
Texto completoCzornik, Adam. "On control problems for jump linear systems". Praca habilitacyjna, Wydawnictwo Politechniki Śląskiej, 2003. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=8802.
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