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 20 of 317 for “"Nonlinear dynamics"”.
-
Problems in nonlinear dynamics
Three types of problems in nonlinear dynamics are studied. First, we use a complex-variable invariant-manifold approach to determine the nonlinear normal modes of weakly nonlinear discrete systems with one-to-one and three-to-one internal resonances. Cubic geometric nonlinearities are considered. …
-
Nonlinear Dynamics In Musical Interactions
This thesis examines nonlinear dynamical processes in musical tools, identifying certain roles that they play in creative interactions with existing tools, and investigates the roles they might play in digital tools. Nonlinear dynamical processes are fundamental in the everyday physical world. They …
-
Nonlinear dynamics in power systems
… by the so-called swing equation, which is a nonlinear second-order ordinary-differential equation with additive and multiplicative harmonic terms having the frequency Ω. When Ω≈ω₀, and Ω≈2ω₀, where ω₀ is the linear natural frequency of the machine, we use digital-computer simulations to …
-
Investigating multiphoton phenomena using nonlinear dynamics
… systems can display extraordinarily complex dynamics which has been studied and uncovered through nonlinear dynamical theory. The leitmotif of this thesis is changing phase-space structures and their (linear or nonlinear) stabilities by adding control functions (which act on the system as …
-
Nonlinear Dynamics of Warped Astrophysical Discs
… relevant regime of large warp amplitudes wherein nonlinear effects and hydrodynamic instabilities significantly modify the warp evolution -- both of which we aim to elucidate in this work. In the first part of this thesis, we construct a novel analytical model which proffers a flexible …
-
Learning Nonlinear Dynamics: Methods and Applications
… scalable, and interpretable methods for learning nonlinear ordinary differential equations (ODEs) and partial differential equations (PDEs) directly from data, with a particular emphasis on applications in fluid dynamics. In Chapter 2, we introduce a novel methodology for learning arbitrary …
-
Nonlinear Dynamics of Energy Harvesting Ocean Buoys
… buoys can be improved by intentionally inserting nonlinearities into the system. The goal is to maximize the amount of energy that is extracted from ocean waves across a broad range of environmental conditions. First, the bifurcation and stability behavior of inhomogeneous floating bodies is …
-
Applications of nonlinear dynamics to information processing
The reported results are direct applications of nonlinear dynamics to information processing or are relevant for the applications. In the second chapter we describe a simple method for estimating the embedding dimension that can be used as a first step in constructing nonlinear models. The method …
-
Applications of nonlinear dynamics to information processing
The reported results are direct applications of nonlinear dynamics to information processing or are relevant for the applications. In the second chapter we describe a simple method for estimating the embedding dimension that can be used as a first step in constructing nonlinear models. The method …
-
Nonlinear dynamics of three-dimensional solitary waves
… waves, often referred to as "lumps"; these are nonlinear disturbances that propagate at speeds below cmin without change of shape owing to a perfect balance between the opposing effects of wave dispersion and nonlinear steepening. Moreover, Cmin is a critical forcing speed, as the linear …
-
Nonlinear dynamics of simple and compound drops
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1985.
-
Advanced Modelling of Helicopter Nonlinear Dynamics and Aerodynamics
… that builds rigid body systems, solves the nonlinear equations of motion and generates the time histories of the corresponding state variables of the vehicle under study. VehicleSim is able to provide the linearised equations of motion in a Matlab file and the symbolic state-space model. …
-
Nonlinear Dynamics of Electrostatically and Magnetically Actuated MEMS
… The simulation tool is used to explore new nonlinear dynamic properties of electrostatic MEMS devices in this work. Complex nonlinear oscillations and the period doubling route to chaos are observed under superharmonic excitations. The presence of U-sequence in MEMS is reported for the first …
-
Nonlinear dynamics and statistical physics of excitable systems
… either excitable system behavior or oscillator dynamics, depending on a control parameter. Since the neurons are microscopic objects in a fluctuating environment, it is important to add noise to the Bonhoeffer-Van der Pol dynamics in order to achieve a realistic description of neuronal behavior. …
-
Linear and nonlinear dynamics in stratified shear flows
… layer below, are ubiquitous in geophysical fluid dynamics. These are often found to be unstable if the non-dimensional Richardson number Ri, quantifying the strength of stratification to shear, is sufficiently low. This is of particular importance in oceanography, where shear instabilities are …
-
Nonlinear dynamics of two-dimensional Josephson junction arrays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
-
Nonlinear dynamics of viscoelastic flows in complex geometries
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1991.
-
Nonlinear dynamics of one-dimensional Josephson junction arrays
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1995.
-
Nonlinear dynamics of three dimensional fluid flow separation
… steady flows. In this thesis we develop a nonlinear theory for separation and attachment of steady and unsteady three-dimensional fluid flows on no-slip curved moving boundaries. The theory provides analytic criteria for locating the separation line and approximating the shape of separation …
Page 1 of 16