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Dissertations / Theses on the topic 'Equation of beam movement'

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Published: 28 May 2022
Last updated: 31 July 2025

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1

Негрич, М. П. "Періодична крайова задача для рівняння руху балки із нежорстким закріпленням кінців". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65390.

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2

Li, Ziteng. "Stochastic beam equation of jump type : existence and uniqueness." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/stochastic-beam-equation-of-jump-typeexistence-and-uniqueness(52f3f1d1-a64d-45da-85d4-b827b0525bc2).html.

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This thesis explores one kind of equation used to model the physics behind one beam with two ends fixed. Initially, Woinowsky Krieger sets a nonlinear partial differential equation (PDE) model by attaching one nonlinear term to the classic linear beam equation. From Zdzislaw Brezezniak, Bohdan Maslowski, Jan Seidler, they demonstrate this model mixed with one Brownian motion term describing random fluctuation. After stochastic modifications, this model becomes more accurate to the behaviors of beam vibrations in reality, and theoretically, the solution has better properties. In this thesis, th
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Wik, Niklas, David Niemelä, and Zethrin Valter Wagner. "Numerical simulations of the Dynamic Beam Equation in discontinuous media." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-416818.

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The study examines the Projection method and the simultaneousapproximation-term (SAT) method as boundary treatment for the dynamic beam equation using summation-by-parts (SBP) operators for handling the inner domain. The methods are examined for both the homogeneous constant coefficient case, and the inhomogeneous piecewise constant coefficient case with a coupled interface. The outer boundaries are handled by SAT or Projection, the coupled interfaced is handled by Projection or a mix between Projection and SAT. Solutions are integrated in time with finite central difference schemes and compar
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4

LaPean, James William. "Beam scanning offset Casegrain reflector antennas by subreflector movement." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06302009-040304/.

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5

Quiroga, Gonzáles Cruz Sonia, Juan Límaco, and Rioco K. Barreto. "The penalty method and beam evolution equations." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/96079.

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6

Stiernström, Vidar. "Numerical simulation of the Dynamic Beam Equation using the SBP-SAT method." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-227121.

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A stable boundary treatment of the dynamic beam equation (DBE) with two different sets of boundary conditions has been conducted using the summation-by-parts-simultaneous-approximation-term (SBP-SAT) method. As the DBE involves a fourth derivative in space the numerical boundary treatment is highly non-trivial. Using SBP-SAT operators together with suitable time integration schemes the DBE has been simulated and a convergence study has been made. The results show that the SBP-SAT method produces a stable discretistation that is accurate enough to capture the dispersive nature of the dynamic be
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7

Hsia, Wei-Kung 1958. "DOUBLE ANGLE CONNECTION MOMENTS (RICHARD EQUATION, PRYING FORCE, BEAM-LINE THEORY, MOMENT ROTATION CURVE)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/291892.

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8

Huang, Jeffrey. "Numerical solutions of continuous wave beam in nonlinear media." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3742.

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Deformation of a Gaussian beam is observed when it propagates through a plasma. Self-focusing of the beam may be observed when the intensity of the laser increases the index of refraction of plasma gas. Due to the difficulties in solving the nonlinear partial differential equation in Maxwell's wave equation, a numerical technique has been developed in favor of the traditional analytical method. Result of numerical solution shows consistency with the analytical method. This further suggests the validity of the numerical technique employed. A three dimensional graphics package was used to depict
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9

Gkortzas, Panagiotis. "Study on optimal train movement for minimum energy consumption." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-21234.

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The presented thesis project is a study on train energy consumption calculation and optimal train driving strategies for minimum energy consumption. This study is divided into three parts; the first part is a proposed model for energy consumption calculation for trains based on driving resistances. The second part is a presentation of a method based on dynamic programming and the Hamilton-Jacobi-Bellman equation (Bellman’s backward approach) for obtaining optimal speed and control profiles leading to minimum energy consumption. The third part is a case study for a Bombardier Transportation cas
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10

Rydström, Sara. "Regularization of Parameter Problems for Dynamic Beam Models." Licentiate thesis, Växjö University, School of Mathematics and Systems Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-7367.

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<p>The field of inverse problems is an area in applied mathematics that is of great importance in several scientific and industrial applications. Since an inverse problem is typically founded on non-linear and ill-posed models it is a very difficult problem to solve. To find a regularized solution it is crucial to have <em>a priori</em> information about the solution. Therefore, general theories are not sufficient considering new applications.</p><p>In this thesis we consider the inverse problem to determine the beam bending stiffness from measurements of the transverse dynamic displacement. O
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11

Patra, Ramakanta. "A model for Hybrid Dynamic Beam Movement with Specific Application to Wind Energy Units." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/76847.

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The aim of this thesis is to present a structural model for a wind turbine and its supporting pylon, to analyze and simulate attendant vibration phenomena and to suggest and simulate an appropriate control procedure. A wind turbine can be described as an elastic system consisting of distributed parameter, beam and rod type, elements coupled to a rotating lumped mass generator/turbine component at one end. We allow for both lateral and torsional movements of the beam. Solution methods for related vibration and control problems are suggested and analyzed. Results of computations for sample probl
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Bara, Richard J. "Rupture point movement in journal bearings." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0607104-105624/.

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13

Brilot, Axel F. "Studies of Beam-Induced Movement of Single Particles in Vitrified Ice, and, Studies of Heterogeneous Ribosomal Complexes." Thesis, Brandeis University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3622223.

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<p> Electron cryomicroscopy (cryo-EM) techniques allow for the determination of cellular structures in three dimensions. The single-particle reconstruction (SPR) technique uses images of biological macromolecular complexes in a thin vitreous ice layer to generate three-dimensional (3D) reconstructions of them, and is capable of yielding structures of complexes ranging in size from hundreds of kilodaltons to tens of megadaltons.</p><p> Beam-induced motion (BIM) is one of the major causes of a decrease in the signal-to-noise ratio (SNR) in images obtained in electron cryomicroscopy. BIM is sho
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14

Birindelli, Gabriele. "Entropic model for dose calculation in external beam radiotherapy and brachytherapy." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0057.

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Ce travail est dédié au développement et à la validation d'un nouvel algorithme de résolution de l’équation de Boltzmann sur une grille cartésienne pour le transport et le dépôt d'énergie de particules énergétiques et de rayons X dans les tissus humains. Ce modèle basé sur une fermeture entropique fournit un outil mathématique efficace permettant de calculer la dose délivrée avec une précision comparable à celle des codes référents de Monte Carlo (MC) en un temps de calcul fortement réduit et sans exigence de puissance de calcul.Contrairement aux méthodes basées sur une discrétisation angulair
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15

Ruzek, Michal. "Identification expérimentale de l'équation du mouvement de milieux vibroacoustique." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0153/document.

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Ce travail répond à la question de l’identification de l'équation du mouvement à partir des mesures expérimentales. Les structures considérées ont soit une soit deux dimensions. La méthode présentée utilise les méthodes inverses locales qui se basent sur les mesures du champs vibratoire stationnaire. Ces méthodes sont indépendantes des conditions aux limites qui sont inconnues pour l'observateur. Deux méthodes de sélection des modèles sont utilisées pour choisir l'équation du mouvement la plus adaptée parmi un ensemble des modèles a priori. La méthode est appliquée a des nombreux cas expérimen
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Воропай, Алексей Валериевич, П. А. Егоров та Евгений Сергеевич Малахов. "Нестационарное деформирование балок и пластин при наличии дополнительных опор и ребер жесткости". Thesis, Харьковский национальный университет им. В. Н. Каразина, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41156.

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Non-stationary vibrations of complex mechanical systems that can be considered in the form of beams and plates with various mechanical features are investigated. Modeling of features (concentrated masses, additional supports and stiffeners) is made by replacing their influence with non-stationary concentrated forces (reactions), which are determined from the solution of Volterra integral equations using Tikhonov's regularizing algorithm.
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17

Tovar, Anthony Alan. "Off-axis multimode light beam propagation in tapered lenslike media including those with spatial gain or loss variation." PDXScholar, 1988. https://pdxscholar.library.pdx.edu/open_access_etds/3839.

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The propagation of light beams in inhomogeneous dielectric media is considered. The derivation begins with first principles and remains general enough to include off-axis asymmetric multimode input beams in tapered lenslike media with spatial variations of gain or loss. The tapering of lenslike media leads to a number of important applications. A parabolic taper is proposed as a model for a heated axially stretched fiber taper, and beams in such media are fully characterized. Other models are proposed by the concatenation of a parabola with other taper functions.
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18

Johnson, Craig L. "Standing on the Toes of Giants: Social Movement Theory and the Case of the Learning Organisation." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5143.

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The thesis examines two interrelated topics; the perception of management theory in general, and the efficacy of the learning organisation in particular. The purpose of this thesis, therefore, is to compare the rhetoric espoused in the learning organisation literature with a survey of senior managers in large, commercial organisations. The results revealed a positive disposition towards business and management theory in general. The survey also demonstrated that leadership is considered the most important variable in the success of a company. This is facilitated through the attraction and ret
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19

Tonzani, Giulio Maria. "Free Vibrations Analysis of Timoshenko Beams on Different Elastic Foundations via Three Alternative Models." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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The scope of the research is to provide a simpler and more consistent equation for the analysis of the natural frequencies of a beam with respect to the widely used one introduced by Timoshenko in 1916. To this purpose, the free vibrations of a beam resting on Winkler or/and Pasternak elastic foundations are analyzed via original Timoshenko theory as well as two of its truncated versions, which have been proposed by Elishakoff in recent years to overcome the mathematical difficulties associated with the fourth-order time derivative of the deflection. Former equation takes into account for both
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20

Algarawi, Mohammed. "Non-linear discrete-time observer design by sliding mode." Thesis, Brunel University, 2007. http://bura.brunel.ac.uk/handle/2438/5072.

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Research into observer design for non-linear discrete-time systems has produced many design methods. There is no general design method however and that provides the motivation to search for a new simple and realizable design method. In this thesis, an observer for non-linear discrete-time systems is designed using the sliding mode technique. The equation of the observer error is split into two parts; the first part being a linearized model of the system and the second part an uncertain vector. The sliding mode technique is introduced to eliminate the uncertainty caused by the uncertain vector
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21

Johnson, Craig Laurence. "Standing on the toes of giants : social movement theory and the case of the learning organisation." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5143.

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The thesis examines two interrelated topics; the perception of management theory in general, and the efficacy of the learning organisation in particular. The purpose of this thesis, therefore, is to compare the rhetoric espoused in the learning organisation literature with a survey of senior managers in large, commercial organisations. The results revealed a positive disposition towards business and management theory in general. The survey also demonstrated that leadership is considered the most important variable in the success of a company. This is facilitated through the attraction and rete
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22

Evans, Katie Allison. "Reduced Order Controllers for Distributed Parameter Systems." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11063.

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Distributed parameter systems (DPS) are systems defined on infinite dimensional spaces. This includes problems governed by partial differential equations (PDEs) and delay differential equations. In order to numerically implement a controller for a physical system we often first approximate the PDE and the PDE controller using some finite dimensional scheme. However, control design at this level will typically give rise to controllers that are inherently large-scale. This presents a challenge since we are interested in the design of robust, real-time controllers for physical systems. Therefore,
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23

Menezes, Carolina Carmo de. "Relação entre o movimento ortodôntico vestibular dos incisivos inferiores e características do osso alveolar vestibular e lingual: avaliação por meio da tomografia computadorizada cone-beam." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-11042015-085359/.

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Introdução: O objetivo principal desta pesquisa foi avaliar as características do osso alveolar vestibular e lingual, na região ântero-inferior, em pacientes que realizaram tratamento ortodôntico corretivo não cirúrgico da má oclusão de Classe II. Material e Métodos: A amostra foi constituída de 32 pacientes divididos de acordo com a inclinação vestibular dos incisivos inferiores em dois grupos: Grupo Experimental que protruíram ou inclinaram os incisivos para vestibular em 1,5 mm e/ou 10o ou mais e Grupo Controle que protruíram ou inclinaram os incisivos para vestibular menos de 1,5 mm e/ou
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24

Larsson, Karl. "Finite Element Methods for Thin Structures with Applications in Solid Mechanics." Doctoral thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-79297.

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Thin and slender structures are widely occurring both in nature and in human creations. Clever geometries of thin structures can produce strong constructions while requiring a minimal amount of material. Computer modeling and analysis of thin and slender structures have their own set of problems, stemming from assumptions made when deriving the governing equations. This thesis deals with the derivation of numerical methods suitable for approximating solutions to problems on thin geometries. It consists of an introduction and four papers. In the first paper we introduce a thread model for use i
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25

Cimentepe, Ahmet Guray. "Evaluation Of Structural Analysis Methods Used For The Design Of Tbm Segmental Linings." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612795/index.pdf.

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Contrary to the linings of conventionally driven tunnels, the linings of tunnels bored by tunnel boring machines (TBMs) consist of precast concrete segments which are articulated or coupled at the longitudinal and circumferential joints. There are several analytical and numerical structural analysis methods proposed for the design of TBM segmental linings. In this thesis study, different calculation methods including elastic equation method and two dimensional (2D) and three dimensional (3D) beam &ndash<br>spring methods are compared and discussed. This study shows that in addition to the char
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26

Крутась, Ю. С., та Д. С. Микиша. "Влияние жесткости дополнительной опоры в статически неопределимой балке при ударной нагрузке". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40237.

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Рассматривается статически неопределимая консольная балка, конец которой опирается на пружину с заданной жесткостью. Для раскрытия ее статической неопределимости используется метод сил, когда за основную систему принимается балка, левый конец который заделан, а правый свободен.
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27

Fridlund, Olivia. "Omfattning av rörelse och volymförändringar i tumörområdet under strålbehandling av cervikal cancer : En litteraturstudie." Thesis, Umeå universitet, Institutionen för omvårdnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-135387.

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Bakgrund Extern strålbehandling är en viktig del av processen för behandling av cervikal cancer. Målet med denna typ av behandling är att bestråla tumörområdet med så hög dos som möjligt och omkringliggande frisk vävnad med så lite dos som möjligt. Ett problem som upptäckts är att rörelser i tumörområdet under behandling kan påverka precisionen av strålfältet. Syfte Syftet med litteraturstudien var att beskriva omfattning av rörelse och volymförändring i tumörområdet under strålbehandling av cervikal cancer. Metod                  Nio artiklar med kvantitativ design kvalitetsgranskades och res
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Bassam, Maya. "Étude de la stabilité de quelques systèmes d'équations des ondes couplées sur des domaines bornés et non bornés." Thesis, Valenciennes, 2014. http://www.theses.fr/2014VALE0034/document.

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La thèse est portée essentiellement sur la stabilisation indirecte d’un système de deux équations des ondes couplées et sur la stabilisation frontière de poutre de Rayleigh.Dans le cas de la stabilisation d’un système d’équations d’onde couplées, le contrôle est introduit dans le système directement sur le bord du domaine d’une seule équation dans le cas d’un domaine borne ou à l’intérieur d’une seule équation mais dans le cas d’un domaine non borné. La nature du système ainsi couplé dépend du couplage des équations et de la nature arithmétique des vitesses de propagations, et ceci donne diver
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29

Csonka, Gábor. "Tvarování vyzařovací charakteristiky optického vysílače." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218322.

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This work deals with questions of space assembling of several optics beams. There are mentioned the base features and values of space distribution of beam intensity in laser beam. The forms of diffusion of space localized light that is described by beam optics. There is a characterization of Gaussian beam, and diffraction of several beams. There is mentioned a simulation an assembling of two and more beams. It contains model of assembling incoherent beams. The work also includes suggestion of final layout of laser beams, which form optical transmitter with radiating characteristics, resistant
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Ndiaye, Moctar. "Stabilisation et simulation de modèles d'interaction fluide-structure." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30323/document.

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L'objet de cette thèse est l'étude de la stabilisation de modèles d'interaction fluide-structure par des contrôles de dimension finie agissant sur la frontière du domaine fluide. L'écoulement du fluide est décrit par les équations de Navier-Stokes incompressibles tandis que l'évolution de la structure, située à la frontière du domaine fluide, satisfait une équation d'Euler-Bernoulli avec amortissement. Dans le chapitre 1, nous étudions le cas où le contrôle est une condition aux limites de Dirichlet sur les équations du fluide (contrôle par soufflage/aspiration). Nous obtenons des résultats de
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Nascimento, Júnior Paulo Cavalcante do. "Análise estática e dinâmica de vigas laminadas pelo Método dos Elementos de Contorno." Universidade Federal da Paraí­ba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/5363.

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Made available in DSpace on 2015-05-08T14:59:51Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2509612 bytes, checksum: f63968d7b069e4d6a16ca4bafd49aa7b (MD5) Previous issue date: 2013-07-26<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The laminated composite beams are structural components which have aroused great interest in mechanical industry due to providing components of high strength-to-weight ratio, which make them particularly suitable to the automotive and aerospace industry. In recent decades the solutions of mathematical models for laminated beam ha
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Casanova, Jean-Jérôme. "Analyse et contrôle de systèmes fluide-structure avec conditions limites sur la pression." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30073/document.

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Le sujet de la thèse porte sur l'étude (existence, unicité, régularité) et le contrôle de problèmes fluide-structure possédant des conditions limites sur la pression. Le système étudié couple une partie fluide, décrite par les équations de Navier-Stokes incompressibles dans un domaine 2D et une partie structure, décrite par une équation 1D de poutre amortie située sur une partie du bord du domaine fluide. Dans le Chapitre 2, on étudie l'existence de solutions fortes pour ce modèle. Nous démontrons des résultats de régularité optimale pour le système de Stokes avec conditions de bord mixtes sur
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Schwartz, João Paulo. "Avaliação tomográfica das alterações dentárias induzidas pelo aparelho Herbst /." Araraquara, 2018. http://hdl.handle.net/11449/157151.

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Orientador: Dirceu Barnabé Ravelli<br>Resumo: Este estudo avaliou quantitativamente as alterações dentárias induzidas pelo aparelho Herbst imediatamente após o tratamento. Amostra composta por 23 indivíduos brasileiros (12 do gênero masculino e 11 do gênero feminino), média de idade 15,76 ± 1,75, Padrão II com deficiência mandibular, apresentando má oclusão Classe II, divisão 1. Alterações na inclinação dos incisivos inferiores, no trespasse horizontal, no trespasse vertical, na inclinação dos caninos inferiores, na distância intercanino inferior, no perímetro, no comprimento e na largura das
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Teo, Hhih-Ting, and h. teo@griffith edu au. "Tidal Dynamics in Coastal Aquifers." Griffith University. School of Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030729.155028.

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The prediction of coastal groundwater movement is necessary in coastal management. However, the study in this field is still a great challenge due to the involvement of tidal-groundwater interactions and the phenomena of hydrodynamic dispersion between salt-fresh water in the coastal region. To date, numerous theories for groundwater dynamic have been made available in analytical, numerical and also experimental forms. Nevertheless, most of them are based on the zeroth-order shallow flow, i.e. Boussinesq approximation. Two main components for coastal unconfined aquifer have been completed in t
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Teo, Hhih-Ting. "Tidal Dynamics in Coastal Aquifers." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/365678.

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The prediction of coastal groundwater movement is necessary in coastal management. However, the study in this field is still a great challenge due to the involvement of tidal-groundwater interactions and the phenomena of hydrodynamic dispersion between salt-fresh water in the coastal region. To date, numerous theories for groundwater dynamic have been made available in analytical, numerical and also experimental forms. Nevertheless, most of them are based on the zeroth-order shallow flow, i.e. Boussinesq approximation. Two main components for coastal unconfined aquifer have been completed in t
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Amorim, David. "Etude de l'instabilité de couplage des modes transverses dans le Grand Collisionneur de Hadrons du CERN." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAY041.

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Le projet de LHC Haute Luminosité sera une amélioration majeure de l'accélérateur visant à accroître ses performances et son potentiel de découvertes.L'intensité du faisceau sera multipliée par deux pour augmenter la luminosité du collisionneur.À de telles intensités, les effets collectifs et en particulier l'impédance de couplage du faisceau sont une limitation possible des performances du LHC.Après une introduction à la physique des accélérateurs et aux effets des champs électromagnétiques induits, deux codes de simulation des effets cohérents du faisceau seront détaillés : PyHEADTAIL, un co
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Junior, 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/.

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Equações diferenciais de quarta ordem aparecem naturalmente na modelagem de oscilações de estruturas elásticas, como aquelas observadas em pontes pênseis. São considerados dois modelos que descrevem as oscilações no tabuleiro de uma ponte. No modelo unidimensional estudamos blow up em espaço finito de soluções de uma classe de equações diferenciais de quarta ordem. Os resultados apresentados solucionam uma conjectura apresentada em [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):71
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Lupatini, Paula Moraes. "Avaliação da dimensão fractal da estrutura dentária e do osso alveolar adjacente de incisivos maxilares com e sem reabsorção radicular do mesmo pacienteo ortodôntico." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/6488.

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Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-03-23T12:12:30Z No. of bitstreams: 1 paulamoraeslupatini.pdf: 2954241 bytes, checksum: 79130d300f2b4037e5c633836842bf06 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-03-23T12:20:52Z (GMT) No. of bitstreams: 1 paulamoraeslupatini.pdf: 2954241 bytes, checksum: 79130d300f2b4037e5c633836842bf06 (MD5)<br>Made available in DSpace on 2018-03-23T12:20:52Z (GMT). No. of bitstreams: 1 paulamoraeslupatini.pdf: 2954241 bytes, checksum: 79130d300f2b4037e5c633836842bf06 (MD5) Previous issue da
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Pigott, Jeffrey Scott. "Exploration of Earth's Deep Interior by Merging Nanotechnology, Diamond-Anvil Cell Experiments, and Computational Crystal Chemistry." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1435154850.

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Campos, Marcio José da Silva. "Avaliação da densidade mineral óssea e radicular de incisivos superiores com e sem diagnóstico de reabsorção radicular apical em indivíduos submetidos a tratamento ortodôntico." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4951.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-06-14T19:54:45Z No. of bitstreams: 1 marciojosedasilvacampos.pdf: 1176643 bytes, checksum: 1457c82026f6f668987773e0e28443e4 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-29T12:17:33Z (GMT) No. of bitstreams: 1 marciojosedasilvacampos.pdf: 1176643 bytes, checksum: 1457c82026f6f668987773e0e28443e4 (MD5)<br>Made available in DSpace on 2017-06-29T12:17:33Z (GMT). No. of bitstreams: 1 marciojosedasilvacampos.pdf: 1176643 bytes, checksum: 1457c82026f6f668987773e0e28443e4 (MD5) Pr
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Johnson, William Richard. "Active Structural Acoustic Control of Clamped and Ribbed Plates." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4011.

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A control metric, the weighted sum of spatial gradients (WSSG), has been developed for use in active structural acoustic control (ASAC). Previous development of WSSG [1] showed that it was an effective control metric on simply supported plates, while being simpler to measure than other control metrics, such as volume velocity. The purpose of the current work is to demonstrate that the previous research can be generalized to plates with a wider variety of boundary conditions and on less ideal plates. Two classes of plates have been considered: clamped flat plates, and ribbed plates. On clamped
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Maia, Cibelle Dias de Carvalho Dantas. "Flexão e estabilidade de barras usando o modelo de Bickford-Reddy: uma abordagem pelo método dos elementos de contorno." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/9110.

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Submitted by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2017-07-18T12:41:11Z No. of bitstreams: 1 arquivototal.pdf: 2094299 bytes, checksum: 783d6f9949086fb75e4a51fc3adbd48a (MD5)<br>Made available in DSpace on 2017-07-18T12:41:11Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 2094299 bytes, checksum: 783d6f9949086fb75e4a51fc3adbd48a (MD5) Previous issue date: 2016-04-22<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>In this work, new solutions based on the Boundary Element Method (BEM) are established for the linear analysis of bending and stability pro
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Delmon, Vivien. "Recalage déformable de projections de scanner X à faisceau conique." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0128/document.

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Évaluer quantitativement les mouvements d'un patient lors d'un traitement par radiothérapie est un enjeu majeur. En effet, ces mouvements et ces déformations anatomiques induisent une incertitude balistique conduisant les thérapeutes à augmenter les marges de sécurité, ce qui peut empêcher de délivrer une dose suffisante à la région tumorale. Dans le cadre de cette thèse, nous nous sommes intéressés à l'estimation de ces mouvements dans les images obtenues juste avant le traitement par le scanner à faisceau conique. Pour cela, nous avons utilisé des algorithmes de recalage déformable. Dans un
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44

Šabartová, Zuzana. "Prostorová dekompozice úloh stochastického programování s omezeními ve tvaru diferenciálních rovnic." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230116.

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Rozsáhlá třída inženýrských optimalizačních úloh vede na modely s omezeními ve tvaru obyčejných nebo parciálních diferenciálních rovnic (ODR nebo PDR). Protože diferenciálních rovnice je možné řešit analyticky jen v nejjednodušších případech, bylo k řešení použito numerických metod založených na diskretizaci oblasti. Zvolili jsme metodu konečných prvků, která umožňuje převod omezení ve tvaru diferenciálních rovnic na omezení ve tvaru soustavy lineárních rovnic. Reálné problémy jsou často velmi rozsáhlé a přesahují dostupnou výpočetní kapacitu. Výpočetní čas lze snížit pomocí progressive hedgin
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Rizzo, Carmelo. "Symmetry Energy Effects in Low Energy Heavy Ion Collisions with Exotic Beams." Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/124.

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We investigate the reaction path followed by Heavy Ion Collisions with exotic nuclear beams at low energies. The evolution of the system is described by a Stochastic Mean Field transport equation (SMF), where two parameterizations for the density dependence of symmetry energy (Asysoft and Asystiff) are implemented, allowing one to explore the sensitivity of the results to this ingredient of the nuclear interaction. We report the properties of the prompt dipole radiation, produced via a collective bremsstrahlung mechanism, in fusion reactions with exotic beams. We show that the gamma yield is s
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46

Dalibard, Jean. "Le rôle des fluctuations dans la dynamique d'un atome couple au champ électromagnétique." Paris 6, 1986. http://www.theses.fr/1986PA066393.

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Etude de la dynamique atomique interne; possibilité de séparer la contribution des fluctuations du vide et de la réaction du rayonnement pour differents processus radiatifs (émission spontanée, déplacement de Lamb, etc. ). Etude de la dynamique atomique externe en partant de l'analogie entre ce problème et celui du mouvement brownien; établissement d'une équation de Fokker-Planck-Kramers pour l'évolution de la fonction de Wigner atomique, avec termes de force stationnaire, force de frottement etc. Etude détaillée du mouvement atomique dans une onde laser stationnaire intense: refroidissement,
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Дорошенко, Ю. І. "Оцінювання впливу місцевих опорів на гідравлічну енерговитратність поліетиленових газових мереж". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2011. http://elar.nung.edu.ua/handle/123456789/1959.

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Дисертацію присвячено оцінюванню впливу місцевих опорів на гідравлічну енерговитратність поліетиленових газових мереж. Досліджено і проаналізовано практику проектування газових мереж. Проведені теоретичні та експериментальні дослідження динаміки руху газу терморезисторними з’єднаннями поліетиленових трубопроводів та визначені коефіцієнти їх місцевих опорів. Визначено коефіцієнти еквівалентної довжини залежно від типу та кількості місцевих опорів на 1 км довжини газових мереж. Розроблені рекомендації з удосконалення розрахунків газових мереж із поліетиленових труб, удосконалення конструкції тер
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Streng, Christoph. "Wachstumsanalyse amorpher dicker Schichten und Schichtsysteme." Doctoral thesis, [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972086544.

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49

Li, Xiaodong. "Observation et commande de quelques systèmes à paramètres distribués." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00456850.

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L'objectif principal de cette thèse consiste à étudier plusieurs thématiques : l'étude de l'observation et la commande d'un système de structure flexible et l'étude de la stabilité asymptotique d'un système d'échangeurs thermiques. Ce travail s'inscrit dans le domaine du contrôle des systèmes décrits par des équations aux dérivées partielles (EDP). On s'intéresse au système du corps-poutre en rotation dont la dynamique est physiquement non mesurable. On présente un observateur du type Luenberger de dimension infinie exponentiellement convergent afin d'estimer les variables d'état. L'observateu
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50

Beckstein, Pascal. "Methodenentwicklung zur Simulation von Strömungen mit freier Oberfläche unter dem Einfluss elektromagnetischer Wechselfelder." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232474.

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Im Bereich der industriellen Metallurgie und Kristallzüchtung treten bei zahlreichen Anwendungen, wo magnetische Wechselfelder zur induktiven Beeinflussung von leitfähigen Werkstoffen eingesetzt werden, auch Strömungen mit freier Oberfläche auf. Das Anwendungsspektrum reicht dabei vom einfachen Aufschmelzen eines Metalls in einem offenen Tiegel bis hin zur vollständigen Levitation. Auch der sogenannte RGS-Prozess, ein substratbasiertes Kristallisationsverfahren zur Herstellung siliziumbasierter Dünnschichtmaterialien, ist dafür ein Beispiel. Um bei solchen Prozessen die Interaktion von Magnetf
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