Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"chaotic oscillations"”.
-
A computational framework for similarity estimation and stimulus reconstruction of Hodgkin-Huxley neural responses
Periodic stimuli are known to induce chaotic oscillations in the squid giant axon for a certain range of frequencies, a behaviour modelled by the Hodgkin-Huxley equations. Inthe presence of chaotic oscillations, similarity between neural responses depends on their temporal nature as firing times …
-
Nonlinear thermoacoustic oscillations of a ducted laminar premixed flame
… Nonlinear systems can have quasi-periodic and chaotic oscillations. This thesis examines the different types of oscillation in a numerical model of a ducted premixed flame, the bifurcations that lead to these oscillations and the influence of external forcing on these oscillations. Criteria for …
-
Investigation into the Local and Global Bifurcations of the Whirling Planar Pendulum
… bifurcations lead to two independent types of chaotic oscillations which are induced by sinusoidal excitations. The types of chaos are each associated with one of two homoclinic orbits in the system's phase portraits. The onset of each type of chaos is investigated through Melnikov's Method …
-
Fluid Mechanics for Biomedical Applications: Weakly Viscoelastic Electrospray, Flow Focusing and Collapsible Channel Models
… Flow Focusing for some applications (e.g. XFEL), chaotic oscillations on the jet, known as whipping, must be avoided. A stability map for axisymmetric and lateral perturbation modes was obtained and compared to previous experimental data, examining the effect of different nozzle geometries on the …
-
Optimisation of chaotic thermoacoustics
… into acoustic energy, which may generate loud oscillations. If uncontrolled, these acoustic oscillations, also known as thermoacoustic instabilities, can cause mechanical vibrations, fatigue and structural failure. An important objective of manufacturers is to design systems that are linearly …
-
Asymmetric Structures in Systems of Non-equilibrium Bose-Einstein Condensates
… revealing the transition from periodic to chaotic oscillations. Following this, we introduce a more complex model that includes reservoir dynamics and present a series of bifurcation diagrams showing regions of parameter space in which asymmetric dyads form. We then show that asymmetric …
-
Mathematical problems arising in interfacial electrohydrodynamics
… waves and complex nonlinear dynamics including chaotic interfacial oscillations. It is established that a sufficiently high electric field will drive the system to chaotic oscillations, even when the Reynolds number is smaller than the critical value below which the non-electrified problem is …
-
Phase dynamics of irregular oscillations
In der vorliegenden Dissertation wird eine Beschreibung der Phasendynamik irregulärer Oszillationen und deren Wechselwirkungen vorgestellt. Hierbei werden chaotische und stochastische Oszillationen autonomer dissipativer Systeme betrachtet. Für eine Phasenbeschreibung stochastischer Oszillationen …