Дисертації з теми "Problem of the many"
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Nagy, Gabor. "Heuristic methods for the many-to-many location-routing problem." Thesis, University of Birmingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268969.
Повний текст джерелаWoods, Evan T. "The Problems of the Many." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563318642660876.
Повний текст джерелаGuertler, Siegfried. "Large scale computer-simulations of many-body Bose and Fermi systems at low temperature." Thesis, Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40887741.
Повний текст джерелаDale, Edward Robert. "Visualizing the inner structure of n-body data using splatting and skeletonization /." Link to online version, 2006. https://ritdml.rit.edu/dspace/handle/1850/2071.
Повний текст джерелаFritsch, Stefan. "Chiral dynamics and the nuclear many-body problem." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973410205.
Повний текст джерелаGifford, Christopher S. "All bar one : the problem of the many." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659104.
Повний текст джерелаDyhdalo, Alexander. "Aspects of the Many-Body Problem in Nuclear Physics." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524186564591926.
Повний текст джерелаMeng, Tan Chee. "Infinitely Many Radial Solutions to a Superlinear Dirichlet Problem." Scholarship @ Claremont, 2007. https://scholarship.claremont.edu/hmc_theses/202.
Повний текст джерелаPeres, Nuno Miguel Machado Reis. "The Many-Electron Problem In Novel Low-Dimensional Materials." Doctoral thesis, Universidade de Évora, 1998. http://hdl.handle.net/10174/11018.
Повний текст джерелаHampton, Marshall. "Concave central configurations in the four-body problem /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5728.
Повний текст джерелаSteiger, Don. "Numerical n-body methods in computational chemistry /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924930.
Повний текст джерелаStadel, Joachim Gerhard. "Cosmological N-body simulations and their analysis /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/5449.
Повний текст джерелаD'Amico, Irene. "Some aspects of the dynamics of many-body systems /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9988653.
Повний текст джерелаJames, Alan John. "Solving the many electron problem with quantum Monte-Carlo methods." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309224.
Повний текст джерелаKhan, Imran. "QUANTUM THEORY OF MANY BOSE ATOM SYSTEMS." Connect to Online Resource-OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=Toledo1195507917.
Повний текст джерелаHarvey, Michael. "Diophantine problems in many variables." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529849.
Повний текст джерелаMoghrabi, Kassem. "Beyond-mean-field corrections and effective interactions in the nuclear many-body problem." Phd thesis, Paris 11, 2013. http://tel.archives-ouvertes.fr/tel-00908607.
Повний текст джерелаAlbertsson, Martin. "Analysis of the Many-Body Problem in One Dimension with Repulsive Delta-Function Interaction." Thesis, Uppsala universitet, Teoretisk fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226119.
Повний текст джерелаYang, C. J., M. Grasso, K. Moghrabi, and Kolck U. van. "Renormalizability of the nuclear many-body problem with the Skyrme interaction beyond mean field." AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/624477.
Повний текст джерелаDereziński, Jan. "Existence and analyticity of many body scattering amplitudes at low energies." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/53870.
Повний текст джерелаPh. D.
Bröcker, Peter [Verfasser], Simon [Gutachter] Trebst, and David [Gutachter] Gross. "Disentangling and machine learning the many-fermion problem / Peter Bröcker ; Gutachter: Simon Trebst, David Gross." Köln : Universitäts- und Stadtbibliothek Köln, 2018. http://d-nb.info/1163728357/34.
Повний текст джерелаMarsden, David Charles. "An investigation of the Tucson-Melbourne three-nucleon force in the nuclear many-body problem." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/289793.
Повний текст джерелаKorattiyil, Thomas. "Many poor and many religions toward a theology of liberative dialogue of religions /." Theological Research Exchange Network (TREN), 1997. http://www.tren.com.
Повний текст джерелаGardner, Jeffrey P. "Numerical simulations of galaxy formation in a cosmological context /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5416.
Повний текст джерелаAlkurtass, B. "A quantum information approach to many-body problems." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1469005/.
Повний текст джерелаCampbell, Luke. "Inelastic losses in x-ray absorption theory /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/9711.
Повний текст джерелаLi, Miqing. "Evolutionary many-objective optimisation : pushing the boundaries." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/11778.
Повний текст джерелаDinh, Thi Hanh Physics Faculty of Science UNSW. "Application of many-body theory methods to atomic problems." Publisher:University of New South Wales. Physics, 2009. http://handle.unsw.edu.au/1959.4/43734.
Повний текст джерелаAl-Saedi, Ahmed Eid. "The orbits of periodic solutions of many body problems." Thesis, Swansea University, 2001. https://cronfa.swan.ac.uk/Record/cronfa42792.
Повний текст джерелаSvensson, Carl Edward. "Collectivity in A ~ 60 nuclei : superdeformed and smoothly terminating rotational bands /." *McMaster only, 1998.
Знайти повний текст джерелаFuruhashi, Takeshi, Tomohiro Yoshikawa, and Shun Otake. "A Study on Aggregation of Objective Functions in MaOPs Based on Evaluation Criteria." 日本知能情報ファジィ学会, 2010. http://hdl.handle.net/2237/20688.
Повний текст джерелаSCIS & ISIS 2010, Joint 5th International Conference on Soft Computing and Intelligent Systems and 11th International Symposium on Advanced Intelligent Systems. December 8-12, 2010, Okayama Convention Center, Okayama, Japan
Scarlatella, Orazio. "Driven-Dissipative Quantum Many-Body Systems." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS281/document.
Повний текст джерелаMy PhD was devoted to the study of driven-dissipative quantum many-body systems. These systems represent natural platforms to explore fundamental questions about matter under non-equilibrium conditions, having at the same time a potential impact on emerging quantum technologies. In this thesis, we discuss a spectral decomposition of single-particle Green functions of Markovian open systems, that we applied to a model of a quantum van der Pol oscillator. We point out that a sign property of spectral functions of equilibrium systems doesn't hold in the case of open systems, resulting in a surprising ``negative density of states", with direct physical consequences. We study the phase transition between a normal and a superfluid phase in a prototype system of driven-dissipative bosons on a lattice. This transition is characterized by a finite-frequency criticality corresponding to the spontaneous break of time-translational invariance, which has no analog in equilibrium systems. Later, we discuss the mean-field phase diagram of a Mott insulating phase stabilized by dissipation, which is potentially relevant for ongoing experiments. Our results suggest that there is a trade off between the fidelity of the stationary phase to a Mott insulator and robustness of such a phase at finite hopping. Finally, we present some developments towards using dynamical mean field theory (DMFT) for studying driven-dissipative lattice systems. We introduce DMFT in the context of driven-dissipative models and developed a method to solve the auxiliary problem of a single impurity, coupled simultaneously to a Markovian and a non-Markovian environment. As a test, we applied this novel method to a simple model of a fermionic, single-mode impurity
Seewald, Nadiane Cristina Cassol [UNESP]. "Método do hamiltoniano termodinamicamente equivalente para sistemas de muitos corpos." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/102540.
Повний текст джерелаFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O objetivo da Tese é investigar a aplicabilidade e propor extensões do método do hamiltoniano termodinamicamente equivalente (MHTE) para sistemas de muitos corpos descritos por uma teoria de campos. Historicamente, o MHTE tem sua origem na teoria quântica de muitos corpos para descrever o fenômeno da supercondutividade. O método consiste na observação de que o hamiltoniano de um sistema pode ser diagonalizado exatamente através de uma transformação unitária quando um número finito de momentos transferidos que contribuem para a interação é levado em conta no limite termodinâmico. Essa transformação unitária depende explicitamente de funções de gap que podem ser determinadas através do método variacional de Gibbs. Na presente Tese, extensões do método são feitas visando aplicações em sistemas de muitos corpos em diferentes situações, tais como: transições de fase estáaticas, evolução temporal de parâmetros de ordem descrita por equações dinâmicas estocásticas do tipo Ginzburg-Landau-Langevin (GLL), teorias quânticas de campos escalares relativísticos e teorias de muitos corpos para sistemas fermiônicos não relativísticos. Mostra-se, em particular, que o MHTE é um esquema de aproximação sistemático e controlável que permite incorporar acoplamentos de componentes de Fourier de parâmetros de ordem além do modo zero, da mesma forma que em teorias quânticas relativísticas ou não relativísticas ele incorpora correlações não perturbativas entre as partículas além daquelas levadas em conta pelas tradicionais aproximações de campo médio. Métodos são desenvolvidos para obtermos soluções numéricas explícitas com o objetivo de avaliar a aplicabilidade do MHTE em alguns casos específicos. Particular atenção é dedicada ao controle de divergências de Rayleigh-Jeans nas simulações numéricas de equações de GLL
The general objective of the Thesis is to apply the Method of the Thermodynamically Equivalent Hamiltonian (MTEH) to many-body systems described by a field theory. Historically, the MTEH has its origins in the quantum theory of manybody systems to describe the phenomenon of superconductivity. The method is based on the observation that the Hamiltonian of the system can be diagonalized exactly with a unitary transformation when a finite number of transfer momenta of the interaction are taken into account in the thermodynamic limit. This unitary transformation depends explicitly on gap functions that can be determined with the use of the Gibbs variational principle. In the present Thesis, extensions of the method are made envisaging applications in many-body systems in different situations, like: static phase transitions, time evolution of order parameters described by dynamic stochastic Ginzburg-Landau-Langevin equations, relativistic quantum scalar field theories, and many-body theories for nonrelativistic fermionic systems. It is shown that the MTEH is a systematic and controllable approximation scheme that in the theory of phase transitions allows to incorporate Fourier modes of the order parameter beyond the zero mode, in the same way that in the relativistic and nonrelativistic theories it incorporates particle nonperturbative correlations beyond those taken into account by the traditional mean field approximation. Methods are developed to obtain explicit numerical solutions with the aim to assess the applicability of the MTEH in specific situations. Particular attention is devoted to the control of Rayleigh-Jeans ultraviolet divergences in the numerical simulations of Ginzburg-Landau-Langevin equations
Seewald, Nadiane Cristina Cassol. "Método do hamiltoniano termodinamicamente equivalente para sistemas de muitos corpos /." São Paulo, 2012. http://hdl.handle.net/11449/102540.
Повний текст джерелаBanca: Marcus Benghi Pinto
Banca: Ney Lemke
Banca: Sandra dos Santos Padula
Banca: Yogiro Hama
Resumo: O objetivo da Tese é investigar a aplicabilidade e propor extensões do método do hamiltoniano termodinamicamente equivalente (MHTE) para sistemas de muitos corpos descritos por uma teoria de campos. Historicamente, o MHTE tem sua origem na teoria quântica de muitos corpos para descrever o fenômeno da supercondutividade. O método consiste na observação de que o hamiltoniano de um sistema pode ser diagonalizado exatamente através de uma transformação unitária quando um número finito de momentos transferidos que contribuem para a interação é levado em conta no limite termodinâmico. Essa transformação unitária depende explicitamente de funções de gap que podem ser determinadas através do método variacional de Gibbs. Na presente Tese, extensões do método são feitas visando aplicações em sistemas de muitos corpos em diferentes situações, tais como: transições de fase estáaticas, evolução temporal de parâmetros de ordem descrita por equações dinâmicas estocásticas do tipo Ginzburg-Landau-Langevin (GLL), teorias quânticas de campos escalares relativísticos e teorias de muitos corpos para sistemas fermiônicos não relativísticos. Mostra-se, em particular, que o MHTE é um esquema de aproximação sistemático e controlável que permite incorporar acoplamentos de componentes de Fourier de parâmetros de ordem além do modo zero, da mesma forma que em teorias quânticas relativísticas ou não relativísticas ele incorpora correlações não perturbativas entre as partículas além daquelas levadas em conta pelas tradicionais aproximações de campo médio. Métodos são desenvolvidos para obtermos soluções numéricas explícitas com o objetivo de avaliar a aplicabilidade do MHTE em alguns casos específicos. Particular atenção é dedicada ao controle de divergências de Rayleigh-Jeans nas simulações numéricas de equações de GLL
Abstract: The general objective of the Thesis is to apply the Method of the Thermodynamically Equivalent Hamiltonian (MTEH) to many-body systems described by a field theory. Historically, the MTEH has its origins in the quantum theory of manybody systems to describe the phenomenon of superconductivity. The method is based on the observation that the Hamiltonian of the system can be diagonalized exactly with a unitary transformation when a finite number of transfer momenta of the interaction are taken into account in the thermodynamic limit. This unitary transformation depends explicitly on gap functions that can be determined with the use of the Gibbs variational principle. In the present Thesis, extensions of the method are made envisaging applications in many-body systems in different situations, like: static phase transitions, time evolution of order parameters described by dynamic stochastic Ginzburg-Landau-Langevin equations, relativistic quantum scalar field theories, and many-body theories for nonrelativistic fermionic systems. It is shown that the MTEH is a systematic and controllable approximation scheme that in the theory of phase transitions allows to incorporate Fourier modes of the order parameter beyond the zero mode, in the same way that in the relativistic and nonrelativistic theories it incorporates particle nonperturbative correlations beyond those taken into account by the traditional mean field approximation. Methods are developed to obtain explicit numerical solutions with the aim to assess the applicability of the MTEH in specific situations. Particular attention is devoted to the control of Rayleigh-Jeans ultraviolet divergences in the numerical simulations of Ginzburg-Landau-Langevin equations
Doutor
Tran, Nhan Thanh. "Numerical methods for solving wave scattering problems." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32508.
Повний текст джерелаDepartment of Mathematics
Alexander G. Ramm
In this thesis, the author presents several numerical methods for solving scalar and electromagnetic wave scattering problems. These methods are taken from the papers of Professor Alexander Ramm and the author, see [1] and [2]. In Chapter 1, scalar wave scattering by many small particles of arbitrary shapes with impedance boundary condition is studied. The problem is solved asymptotically and numerically under the assumptions a << d << λ, where k = 2π/λ is the wave number, λ is the wave length, a is the characteristic size of the particles, and d is the smallest distance between neighboring particles. A fast algorithm for solving this wave scattering problem by billions of particles is presented. The algorithm comprises the derivation of the (ORI) linear system and makes use of Conjugate Orthogonal Conjugate Gradient method and Fast Fourier Transform. Numerical solutions of the scalar wave scattering problem with 1, 4, 7, and 10 billions of small impedance particles are achieved for the first time. In these numerical examples, the problem of creating a material with negative refraction coefficient is also described and a recipe for creating materials with a desired refraction coefficient is tested. In Chapter 2, electromagnetic (EM) wave scattering problem by one and many small perfectly conducting bodies is studied. A numerical method for solving this problem is presented. For the case of one body, the problem is solved for a body of arbitrary shape, using the corresponding boundary integral equation. For the case of many bodies, the problem is solved asymptotically under the physical assumptions a << d << λ, where a is the characteristic size of the bodies, d is the minimal distance between neighboring bodies, λ = 2π/k is the wave length and k is the wave number. Numerical results for the cases of one and many small bodies are presented. Error analysis for the numerical method are also provided.
Fritsche, Gian Mauricio. "Hyper-heuristic based particle swarm optimization for many-objective problems." reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/41790.
Повний текст джерелаDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 29/02/2016
Inclui referências : f. 81-87
Resumo: O algoritmo de Otimização por Enxame de Partículas (PSO) e uma meta-heurística inspirada no comportamento de bandos de aves a procura de alimento. Os bons resultados obtidos por esta técnica na otimização de problemas mono-objetivo incentivaram o estudo de variações para problemas multi- objetivo (MOPSO), que também alcançaram bons resultados. Para a adaptação do PSO para problemas multi-objetivo algumas modificações foram necessárias, tais como o uso de um operador para seleção de líder e a aplicação de um operador de arquivamento. Entretanto, a qualidade do algoritmo diminui conforme o aumento do numero de objetivos. Encontrar, dentre os diferentes operadores de selecao de líder e de arquivamento, propostos na literatura, os mais apropriado para determinada instância de um problema permite amenizar esta perda de qualidade. Porem esta tarefa não é uma tarefa trivial. Em trabalhos anteriores o uso de hiper-heurística para a seleção de uma combinação apropriada destes operadores e proposta. Hiper-heurísticas são técnicas para a seleção, ou geração, de heurísticas para problemas de busca. Estas técnicas visam a seleção, ou geração, de uma heurística apropriada para determinada instancia de um problema ou estágio da busca. Neste trabalho foi abordada a hipótese de que, o uso de métodos de seleção mais avançados poderiam melhorar desempenho do MOPSO baseado em Hiper-heurística (H-MOPSO). Para investigar esta hipótese quatro métodos de seleção foram avaliados e comparados a um algoritmo multi-objetivo estado da arte. Nos resultados apresentados o H-MOPSO obteve melhores resultados na maioria dos problemas.
Abstract: Multi-objective Particle Swarm Optimization (MOPSO) is a promising meta-heuristic to solve Many-Objective Problems (MaOPs), however, its performance decreases as the number of objective functions increases. Selecting a good combination of leader and archiving methods helps the algorithm to deal with the challenges caused by this increase in the number of objectives, but finding the most appropriate combination for a given problem is a hard task. To deal with this issue, previous works proposed the use of a simple hyper-heuristic to select dynamically a good combination of leader and archiving methods and achieved promising results. In this work, we hypothesize that by using more advanced heuristic selection methods we could further improve the performance of the algorithm. To investigate this hypothesis we conducted experimental studies comparing four heuristic selection methods. After selecting the best performing variant from this study, we conducted a second empirical study to compare this variant to a state-of-the- art optimizer, where the resulting algorithm outperformed it in most of the problems investigated.
Johnson, Cory. "Suggestions for Deontic Logicians." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/19221.
Повний текст джерелаMaster of Arts
Mathews, Susann Miller. "The effect of using as many variables as are needed to solve word problems on the problem-solving skills and attitudes of students in Algebra I /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487853913101401.
Повний текст джерелаMolari, Marco. "Statistical mechanics of polymer models: rigorous results and applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10429/.
Повний текст джерелаNakib, Protik H. "The Multiconfiguration Time Dependent Hartree-Fock Method for Cylindrical Systems." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26297.
Повний текст джерелаLuu, Thomas C. "Effective interactions within an oscillator basis /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9803.
Повний текст джерелаGibson, Peter C. "Moment problems for Jacobi matrices and inverse problems for systems of many coupled oscillators." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ49497.pdf.
Повний текст джерелаXie, Zhifu. "On the N-body Problem." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1444.pdf.
Повний текст джерелаOlsson, Emma. "Many-body Problems in the Theory of Stellar Collapse and Neutron Stars." Doctoral thesis, Uppsala University, The Uppsala Astronomical Observatory, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4704.
Повний текст джерелаWhen modelling the collapse of massive stars leading to supernova explosions and the cooling of neutron stars, understanding the microphysical processes, such as the interaction of neutrinos within a dense medium are of vital importance. The interaction of neutrinos with nucleons (neutrons and protons) is altered by the presence of the medium, compared to the same process with free nucleons. Neutrino scattering and production processes may be characterized in terms of the excitations that are created or destroyed in the nuclear medium. One way to analyse the effects of the medium is by using Landau's theory of normal Fermi liquids. This theory gives simple relationships between physical quantities such as the spin susceptibility or the response to a weak interaction probe in terms of Landau parameters, that are measures of the interaction between quasiparticles. One problem when using Landau Fermi liquid theory for nucleon matter is that the interaction has a tensor component. The tensor interaction does not conserve the total spin and, as a consequence, there are generally contributions to long-wavelength response functions from states that have more than one quasiparticle-quasihole pair in the intermediate state. Such contributions cannot be calculated in terms of Landau parameters alone, since in the usual formulation of Landau theory, only singlepair excitations are considered. In this thesis three problems are addressed. First, we obtain bounds on the contributions from more than one quasiparticle-quasihole pair by using sum-rule arguments. Second, we derive expressions for static response functions allowing for the tensor components of the interaction. We analyse which the most important effects are on the static response of nucleon matter, and find that the major contributions comes from renormalization of coupling constants and transitions to states with more than one quasiparticle-quasihole pair. Third, we show how contributions to the dynamical response coming from states containing two quasiparticle-quasihole pairs may be evaluated in terms of Landau theory if one allows for the effect of collisions in the Landau kinetic equation. We consider the case of asymmetric nuclear matter, and our work goes beyond earlier works in that they contain the effects of collisions in addition to those of the mean field.
Gmys, Jan. "Heterogeneous cluster computing for many-task exact optimization : application to permutation problems." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10142/document.
Повний текст джерелаBranch-and-Bound (B&B) is a frequently used tree-search exploratory method for the exact resolution of combinatorial optimization problems (COPs). However, in practice, only small problem instances can be solved on a sequential computer, as B&B generates often generates a huge amount of subproblems to be evaluated. In order to solve large COPs, we revisit the design and implementation of massively parallel B&B on top of large heterogeneous clusters, integrating multi-core CPUs, many-core processors and GPUs. For the efficient storage and management of subproblems an original data structure (IVM) dedicated to permutation problems is used. Because of the highly irregular and unpredictable shape of the B&B tree, dynamic load balancing between parallel exploration processes is one of the main issues addressed in this thesis. Based on a compact encoding of the search space in the form of intervals, work stealing strategies for multi-core and GPU are proposed, as well as hierarchical approaches for load balancing in distributed memory multi-CPU/multi-GPU systems. Three permutation problems, the Flowshop Scheduling Problem (FSP), the Quadratic Assignment Problem (QAP) and the n-Queens puzzle problem are used as test-cases. The resolution, in 9 hours, of a FSP instance with an estimated sequential execution time of 22 years demonstrates the scalability of the proposed algorithms on a cluster composed of 36 GPUs
Song, Chang Liang. "An improved procedure for calculating effective interactions and operators /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/9643.
Повний текст джерелаAbreu, Bruno Ricardi de 1990. "Matriz densidade a baixas temperaturas para sistemas com interação de pares." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276983.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Made available in DSpace on 2018-08-24T13:18:32Z (GMT). No. of bitstreams: 1 Abreu_BrunoRicardide_M.pdf: 1928743 bytes, checksum: 32226a9b6b2fe6d0ce77dbb9efc50309 (MD5) Previous issue date: 2014
Resumo: A matriz densidade é um objeto fundamental na mecânica estatística de sistemas de muitos corpos quânticos. Através dela pode ser encontrado o valor esperado de qualquer observável do sistema de interesse. Neste trabalho calculamos a matriz densidade a baixas temperaturas para sistemas de muitos corpos que interagem via um potencial de pares através de convolucões da matriz densidade a altas temperaturas, onde é possível utilizar aproximações semi-clássicas
Abstract: The density matrix is a fundamental object in statistical mechanics of quantum many-body systems. Through it the observed value of any observable of a quantum mechanical system of interest can be found. In this work we calculate the density matrix at low temperatures of manybody systems that interact through pairwise potentials using a convolution procedure of the density matrix at high temperatures, where is possible to apply semi-classical approximations
Mestrado
Física
Mestre em Física
Stevenson, Paul. "Nuclear structure calculations using many-body perturbation theory with a separable interaction." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312333.
Повний текст джерелаDuro, Joao A. "Machine learning based decision support for a class of many-objective optimisation problems." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8260.
Повний текст джерелаHoltz, Susan Lady. "Liouville resolvent methods applied to highly correlated systems." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49795.
Повний текст джерела