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Dissertations / Theses on the topic 'Stability dynamics'

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1

Hughes, Jonathan L. "Applications of Stability Analysis to Nonlinear Discrete Dynamical Systems Modeling Interactions." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3819.

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Many of the phenomena studied in the natural and social sciences are governed by processes which are discrete and nonlinear in nature, while the most highly developed and commonly used mathematical models are linear and continuous. There are significant differences between the discrete and the continuous, the nonlinear and the linear cases, and the development of mathematical models which exhibit the discrete, nonlinear properties occurring in nature and society is critical to future scientific progress. This thesis presents the basic theory of discrete dynamical systems and stability analysis
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2

Hsia, Chun-Hsiung. "Bifurcation and stability in fluid dynamics and geophysical fluid dynamics." [Bloomington, Ind.] : Indiana University, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3223038.

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Thesis (Ph.D.)--Indiana University, Dept. of Mathematics, 2006.<br>"Title from dissertation home page (viewed June 28, 2007)." Source: Dissertation Abstracts International, Volume: 67-06, Section: B, page: 3165. Adviser: Shouhong Wang.
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3

Currier, Patrick Norman. "A Method for Modeling and Prediction of Ground Vehicle Dynamics and Stability in Autonomous Systems." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27632.

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A future limitation of autonomous ground vehicle technology is the inability of current algorithmic techniques to successfully predict the allowable dynamic operating ranges of unmanned ground vehicles. A further difficulty presented by real vehicles is that the payloads may and probably will change with unpredictably time as will the terrain on which it is expected to operate. To address this limitation, a methodology has been developed to generate real-time estimations of a vehicleâ s instantaneous Maneuvering Manifold. This approach uses force-moment method techniques to create an adaptive
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4

Van, Ke Sum. "Dynamics and stability of curved pipes conveying fluid." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66108.

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5

Bünte, Matthias. "Dynamics and stability of solar magnetic fields /." [S.l.] : [s.n.], 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10357.

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6

Wirosoetisno, Djoko. "Balance dynamics and stability of vortical flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0007/NQ41342.pdf.

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7

Cheng, Bin. "Long time stability of rotational Euler dynamics." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7155.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2007.<br>Thesis research directed by: Applied Mathematics and Scientific Computation Program. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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8

Park, Jungho. "Bifurcation and stability problems in fluid dynamics." [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3274924.

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Thesis (Ph.D.)--Indiana University, Dept. of Mathematics, 2007.<br>Source: Dissertation Abstracts International, Volume: 68-07, Section: B, page: 4529. Adviser: Shouhong Wang. Title from dissertation home page (viewed Apr. 22, 2008).
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9

Müller, Steffen. "Linearized wheel-rail dynamics : stability and corrugation /." Düsseldorf : VDI-Verl, 1998. http://www.gbv.de/dms/bs/toc/265578795.pdf.

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10

Kallos, George B. "Flow dynamics and stability in severe rainbands." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/25735.

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11

Varley, Paul G. "The stability and dynamics of phosphoglycerate kinases." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293563.

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12

Gao, Shu. "Sediment dynamics and stability of tidal inlets." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387108.

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13

Morrison, Richard Alan. "Dynamics and stability of parametrically excited oscillators." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203874.

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Parametric excitation is a fundamental feature of dynamical systems arising across the applied sciences. In this thesis we study the structure of parametric res- onance and its in uence of the global nonlinear dynamics in a number of oscillating systems which arise in engineering contexts. The parametrically excited Helmholtz oscillator and the elliptically excited pen- dulum are two systems where the interaction of regular and parametric excitation are important for a complete understanding of the dynamics. We examine the resonance structure of the Helmholtz oscillator and use the Melnikov fu
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14

Prinzessin, zu Erbach-Schoenberg Elisabeth. "Dynamics and stability of small social networks." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/365890/.

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The choices and behaviours of individuals in social systems combine in unpredictable ways to create complex, often surprising, social outcomes. The structure of these behaviours, or interactions between individuals, can be represented as a social network. These networks are not static but vary over time as connections are made and broken or change in intensity. Generally these changes are gradual, but in some cases individuals disagree and as a result \fall out" with each other, i.e. , actively end their relationship by ceasing all contact. These \fallouts" have been shown to be capable of fra
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15

MIAO, PEIZHI. "MODELING, STABILITY AND DYNAMICS OF REACTIVE DISTILLATION." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin974208955.

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16

Kim, Hakin. "Dynamics of ceramic grinding: Regeneration and stability." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187059.

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In the present work, the process of grinding is represented through the dynamic interactions of the workpiece with the abrasive grits of the grinding wheel. A mathematical model (grinding dynamic model with wheel and workpiece-GDMWW) based on the resulting instantaneous depth of cut is then developed. The proposed model utilizes the governing equations of motions for both the wheel and the workpiece in a multi-grit grinding process. The cutting action is represented through the interactions of the wheel and the workpiece motions on each other. The parameters for the proposed multi-body dynamic
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17

Zhang, Chang-Hua. "Stability and surface dynamics of metal nanowires." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290097.

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In this thesis, we have systematically investigated the stability, surface dynamics, electronic transport, and growth of metal nanowires using a semiclassical free energy functional based on the mean-field interacting electron model, which is simple and general enough. In this model, the ionic degrees of freedom of the wire are modeled as an incompressible fluid, and the conducting electrons are treated as a Fermi gas confined within the wire with Dirichlet boundary conditions. In equilibrium, we prove that the electron-electron interaction is a second-order effect to the total grand canonical
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18

Conn, Justin J. A. "Stability and dynamics of anti-surfactant solutions." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28432.

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We formulate a fluid-dynamical model describing the behaviour of solutions consisting of a fluid solvent and a dissolved solute, and whose surface tension depends on the concentration of the solute. By considering the surface excess of the dissolved solute, this model can describe the Marangoni-driven flow both of fluids in which there is a surfactant present (which decreases surface tension) and of fluids in which there is an anti-surfactant present (which increases surface tension). By investigating the linear stability of an initially quiescent fluid layer, we predict a novel instability th
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19

Barros, Ceres. "Etude de la stabilité des écosystèmes à plusieurs échelles spatiales et trophiques." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV013/document.

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Dans un contexte de changement global qui continue de menacer les espèces et l’intégrité des écosystèmes à travers le monde, l’étude de la stabilité des écosystèmes n’a jamais été aussi importante. Jusqu’à aujourd’hui, la plupart des études sur la stabilité des écosystèmes se sont centrées sur des écosystèmes simples et des perturbations individuelles, en focalisant généralement sur le comportement de propriétés écosystémiques particulières, comme les indices de productivité et de diversité. Cependant, les écosystèmes sont soumis simultanément à de multiples perturbations. De plus, à grande éc
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20

Kaiser, Thomas. "Impact of Flow Rotation on Flame Dynamics and Hydrodynamic Stability." Thesis, Toulouse, INPT, 2019. http://oatao.univ-toulouse.fr/24115/1/Kaiser_Thomas.pdf.

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This thesis investigates large scale flow rotation in two configurations. In the first, the effect of flow rotation on a laminar flame is investigated. The flame is anchored in the wake of a cylindrical bluff body. The flow rotation is introduced by turning the cylinder along its axis. It is shown by Direct Numerical Simulation (DNS), that the cylinder rotation breaks the symmetry of both flame branches. Flame Transfer Function (FTF) measurements performed by the Wiener-Hopf Inversion suggest, that low rotation rates lead to deep gaps in the gain and the flame becomes almost insensitive to aco
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21

Adhynugraha, Muhammad Ilham. "Longitudinal dynamics of wing in ground effect craft in waves." Thesis, Cranfield University, 2017. http://dspace.lib.cranfield.ac.uk/handle/1826/13095.

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An assessment of the longitudinal motion of a hybrid configuration called the aerodynamically alleviated marine vehicle (AAMV) with the presence of waves, is demonstrated in the thesis. The development of this type of vehicle requires a mathematical framework to characterise its dynamics with the influence of external forces due to the waves’ motion. An overview of the effect of waves towards the models of dynamics developed for wing in ground effect (WIGE) craft and high-speed marine vehicles (planing craft) is carried out. However, the overview only leads to a finding that the longitudinal s
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22

Ramasubramaniam, Ashwin. "Dynamics and stability of nanostructures on crystal surfaces /." View online version; access limited to Brown University users, 2005. http://wwwlib.umi.com/dissertations/fullcit/3174661.

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23

Taylor, Graham K. "Animal flight dynamics : mechanics of stability and control." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270179.

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24

Law, Mohit. "Position-dependent dynamics and stability of machine tools." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44804.

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Machine tool’s productivity and ability to produce a component of the required quality is directly influenced by its dynamic stiffness at the tool center point. Lack of dynamic stiffness may lead to unstable regenerative chatter vibrations which are detrimental to the performance. The chatter vibrations are influenced by the changing structural dynamics of the machine as the tool moves along the tool path, resulting in position-varying machining stability of the system. Evaluation of these varying dynamics at the design stage is a complex process, often involving the use of large order finite
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25

Budu, Paula. "Conditional and unconditional nonlinear stability in fluid dynamics." Thesis, Durham University, 2002. http://etheses.dur.ac.uk/3938/.

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In this thesis we examine some of the interesting aspects of stability for some convection problems. Specifically, the first part of the thesis deals with the Bénard problem for various Non-Newtonian fluids, whereas the second part develops a stability analysis for convection in a porous medium. The work on stability for viscoelastic fluids includes nonlinear stability analyses for the second grade fluid, the generalised second grade fluid, the fluid of dipolar type and the fluid of third grade. It is worth remarking that throughout the work the viscosity is supposed to be any given function o
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26

Calvo, David C. (David Christopher). "Dynamics and stability of gravity-capillary solitary waves." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/88871.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.<br>Includes bibliographical references (leaves 137-143).<br>Over the past several years, it has been recognized that a new class of solitary waves can propagate in nonlinear dispersive wave systems if the phase speed of linear waves attains a local extremum at some finite wavenumber. Near such a point, solitary waves in the form of small-amplitude wavepackets can be obtained for which the phase speed of the carrier oscillations matches the group speed of their envelope. Such an extremum is found in th
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27

Doolin, Samuel. "The dynamics, stability and manifestation of circumbinary orbits." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:e820507f-5cd6-49a1-a5f7-8199c1236544.

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I numerically investigate the dynamics of orbits in 3D circumbinary phase-space as a function of binary eccentricity and mass fraction. I find that inclined circumbinary orbits in the elliptically-restricted three-body problem display a nodal libration mechanism in the longitude of the ascending node and in the inclination to the plane of the binary. I analyse and quantify the behaviour of these orbits and investigate their stability over time. This work is the first dynamically aware analysis of the stability of circumbinary orbits across both binary mass fraction and binary eccentricity. Thi
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28

Кузьменко, Ольга Віталіївна, Ольга Витальевна Кузьменко, Olha Vitaliivna Kuzmenko, and О. В. Козьменко. "Modeling the dynamics stability of Ukrainian banking system." Thesis, Українська академія банківської справи Національного банку України, 2013. http://essuir.sumdu.edu.ua/handle/123456789/59089.

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The work is stressed on the stability indicator of the banking system as binary variable, which takes a single value in unstable condition and non-zero value otherwise. It is offered to explore stability dynamics of Ukrainian banking system as time series, suggested to perform stability indicator on the basis of stationary time series verification by adaptation of the Forster-Stewart method to the peculiarities of the research subject. In the article it is relevant to identify the main factors of stability indicator formation, realize decomposition of a system-forming components of the variabl
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29

Sim, Woo-Gun. "Stability of a flexible cylinder in axisymmetrically confined flow." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63838.

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30

Nikishkov, Yuri G. "Computational stability analysis of dynamical systems." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/12149.

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31

Demir, Huseyin. "The stability properties of some rheological flows." Thesis, University of South Wales, 1996. https://pure.southwales.ac.uk/en/studentthesis/the-stability-properties-of-some-rheological-flows(7f0fad05-8228-4494-90be-375d16e0eab4).html.

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The stability of wall driven and thermally driven cavity flow is investigated for a wide range of viscous and viscoelastic fluids. The effect of inertia, elasticity, temperature gradients, viscous heating and Biot boundary conditions are of particular interest. Both destabilisation and bifurcation phenomenon are found. For Newtonian constant viscosity flow the instabilities are characterised by a critical Reynolds number which represents the ratio of inertial forces to viscous forces, and instability occurs when the inertial forces become large. For non-Newtonian viscoelastic fluids the instab
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32

Plotka, Hanna. "The structure, stability and interaction of geophysical vortices." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3729.

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This thesis examines the structure, stability and interaction of geophysical vortices. We do so by restricting our attention to relative vortex equilibria, or states which appear stationary in a co-rotating frame of reference. We approach the problem from three different perspectives, namely by first studying the single-vortex, quasi-geostrophic shallow-water problem, next by generalising it to an (asymmetric) two-vortex problem, and finally by re-visiting the single-vortex problem, making use of the more realistic, although more complicated, shallow-water model. We find that in all of the sys
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33

Loiseau, Jean-Christophe. "Dynamics and global stability analysis of three-dimensional flows." Thesis, Paris, ENSAM, 2014. http://www.theses.fr/2014ENAM0016/document.

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Comprendre, prédire et finalement retarder la transition vers la turbulence dans les écoulements sont d'importants problèmes posés aux scientifiques depuis les travaux pionniers d'Osborne Reynolds en 1883. Ces questions ont été principalement adressées à l'aide de la théorie des instabilités hydrodynamiques. A cause des ressources informatiques limitées, les analyses de stabilité linéaire reposent essentiellement sur d'importantes hypothèses simplificatrices telles que celle d'un écoulement parallèle. Dans ce cadre, connu sous le nom de stabilité locale, seule la stabilité d'écoulement ayant u
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34

Chatterjee, P. "Protein thermal stability, conformational dynamics and solvent properties: insights with atomistic molecular dynamics simulations." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2015. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2242.

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35

Sheard, Gregory John. "The stability and characteristics of the flow past rings." Monash University, Dept. of Mechanical Engineering, 2004. http://arrow.monash.edu.au/hdl/1959.1/9609.

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36

Gopalakrishnan, Shyam Sunder. "Dynamics and Stability of Flow through Abdominal Aortic Aneurysms." Doctoral thesis, Université de Lyon 1, Ecole Centrale de Lyon, Lyon, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/245358.

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37

Tyc, George. "Dynamics and stability of spinning flexible space tether systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0008/NQ32028.pdf.

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38

Chakraborty, Symphony. "Dynamics and stability of a non-Newtonian falling film." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00828305.

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On étudie la dynamique d'un film mince d'un fluide non-newtonien s'écoulant sur un plan incliné sous l'action de la gravité en tenant compte des effets d'une rhéologie complexe sur la dynamique des ondes de surface. Au chapitre 3, les propriétés des ondes solitaires, qui organisent la dynamique désordonnée d'un film Newtonien, sont considérées. Des simulations numériques directes (DNSs) d'ondes solitaires ont été effectués et comparés aux résultats d'un modèle à quatre équations formulé dans [112]. Au chapitre 5, l'évolution d'un film de fluide en loi de puissance film est modélisée au moyen d
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39

Fahrenkopf, Max A. "Optimization, Dynamics and Stability of Non-Linear Separation Processes." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/390.

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In this thesis we develop a non convex non-linear programming problem that determines the minimum run time of a rapid, gel-free DNA separation technique called micelle end-labeled free solution electrophoresis (ELFSE). Micelle ELFSE is typically performed in capillary electrophoresis where the capillary length, electric field strength, and micelle drag tag size are the primary tuning variables. Using optimization, we demonstrate that capillary electrophoresis can be used to separate up to 600 bases in under 50 minutes. A significant improvement in performance is then shown to be achievable by
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40

Bookless, John Paterson. "Dynamics, stability and control of displaced non-Keplerian orbits." Thesis, University of Glasgow, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433121.

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41

Iyalla, Ibiyekariwaripiribo. "Computational fluid dynamics modelling of pipeline on-bottom stability." Thesis, Robert Gordon University, 2017. http://hdl.handle.net/10059/2721.

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Subsea pipelines are subjected to wave and steady current loads which cause pipeline stability problems. Current knowledge and understanding on the pipeline on-bottom stability is based on the research programmes from the 1980’s such as the Pipeline Stability Design Project (PIPESTAB) and American Gas Association (AGA) in Joint Industry Project. These projects have mainly provided information regarding hydrodynamic loads on pipeline and soil resistance in isolation. In reality, the pipeline stability problem is much more complex involving hydrodynamic loadings, pipeline response, soil resistan
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42

Bayley, James Michael. "Observations of the dynamics and stability of Z pinches." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46669.

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43

Chakroun, Nadim Walid. "Dynamics, stability and scaling of turbulent methane oxy-combustion." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115722.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 203-216).<br>Carbon capture and storage (CCS) is an important strategy for reducing CO₂ emissions, with oxy-fuel combustion being one of the most promising technologies because of it is high efficiency and low cost. In oxy-combustion, CH₄/O₂/CO₂ mixtures burn at low temperatures (~~1700 K), high pressures (~~40 bar), where laminar burning velocities are about 7 times lower than in traditional CH₄ /Air mixtures.
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44

Xu, Yeyin. "STABILITY AND BIFURCATION DYNAMICS OF JOURNAL BEARING ROTOR SYSTEMS." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1835.

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In this dissertation, the mechanical models of 2-DOF and 4-DOF nonlinear journal bearing rotor systems are established. A more accurate model of oil film forces is derived from Reynolds equations. The periodic motions in such nonlinear journal bearing systems are obtained through discrete mapping method. Such a semi-analytical method constructs an implicit discrete mapping structure for periodic motions by discretization of the continuous journal bearing rotor differential equations. Stable and unstable periodic solutions of periodic motions are obtained with prescribed accuracy. The bifurcati
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45

Danczak, Robert E. "Dynamics in Microbial Ecology Across an Environmental Stability Gradient." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1530878203337741.

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46

Rawat, Umang. "Essays on macroeconomic dynamics, credit intermediation and financial stability." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275970.

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This dissertation consists of three chapters. In the first chapter, we study the role of financial frictions on the demand side of the economy. In particular, we study the interaction between firm and household credit constraints over the business cycle. We construct a real business cycle model with explicit modeling of price and quantity side of housing. This allows us to include both firm and household financing frictions. The model is estimated for the U.S economy using quarterly data on key macroeconomic variables over the period 1970 - 2006. Household and firm financial accelerators opera
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47

Kassoul, Myriam. "Essays on Market Dynamics and Stability in Decentralized Finance." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAX021.

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Cette thèse se concentre sur la compréhension et l'évaluation de la stabilité de la Finance Décentralisée, dans le but de renforcer l'ensemble de l'écosystème financier.Le premier chapitre explore les Automated Market Makers (AMM), soulignant leur évolution depuis les marchés de prédiction vers les Constant Function Market Makers (CFMMs), et examine leur compétitivité par rapport aux plateformes d'échange centralisées. Il aborde également la valeur maximale extractible (MEV) et ses implications pour les DEXs.Le deuxième chapitre se penche sur la microstructure des DEXs, en particulier Uniswap,
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48

Öster, Michael. "Stability and Mobility of Localized and Extended Excitations in Nonlinear Schrödinger Models." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8091.

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This thesis is mainly concerned with the properties of some discrete nonlinear Schrödinger equations. These naturally arise in many different physical contexts as the limiting form of general dynamical lattice equations that incorporate nonlinearity and coupling. Interest is focused on theoretical models of coupled optical waveguides constructed from materials with a nonlinear index of refraction. In arrays of waveguides the overlap of the evanescent electric field of the modes in neighbouring waveguides provides a coupling and the nonlinearity of the material provides a mechanism to halt the
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49

Gay, Sebastien Emmanuel. "Contactless magnetic brake for automotive applications." [College Station, Tex. : Texas A&M University, 2005. http://hdl.handle.net/1969.1/ETD-TAMU-1005.

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50

Halatchev, Iordan Atanassov. "Hydrodynamic stability of boundary-layer flows in the presence of mass transfer." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phh157.pdf.

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Bibliography: leaves 201-207. This thesis presents studies of the non-linear mass-transfer kinetics and a linear analysis of the hydrodynamic stability of systems under conditions of intense interfacial mass transfer.
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