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Showing 1 to 20 of 92 for “"Stability Properties."”.
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The Stability Properties of Some Rheological Flows
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 …
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Scattering and stability properties of nonlinear wave equations on asymptotically flat spacetimes
… was introduced to classify systems regarding the stability of their trivial solution. This chapter presents a new heuristic approach to the study of systems of coupled semilinear wave equations in Minkowski space. The non rigorous analysis suggests a condition related to stability for systems of …
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Naked singularities in self-similar gravitational collapse: Stability properties of the Cauchy horizon
The background of this thesis is the cosmic censorship hypothesis, which states that the gravitational collapse of physically reasonable matter should not result in the formation of naked singularities. In the absence of a proof of this hypothesis, much effort has been directed towards examining …
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Parallel methods for the numerical solution of ordinary differential equations
… of nonstiff ordinary differential equations. Stability and accuracy are the two main considerations in deriving good numerical o.d.e. methods. However, existing parallel methods have poor stability properties in that their stability regions are smaller than those of good sequential methods of …
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Approximation Based Safety and Stability Verification of Hybrid Systems
… system. We consider two important classes of properties that are required of hybrid systems in practice, namely, ""safety"" and ""stability"". Intuitively, safety properties are used to express the fact that something bad does not happen during the execution of the system; and stability is …
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SARK: a type-insensitive Runge-Kutta code
… Runge-Kutta (BRK) methods have very desirable stability properties which make them efficient for solving a certain class of ODE which are not solved adequately by current methods. These stability properties arise from applying a numerical method to the standard test problem and analysing the …
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Passivity Methods for the Stabilization of Closed Sets in Nonlinear Control Systems
… of G2, and assuming that G1 enjoys certain stability properties relative to G2, under what conditions does G1 enjoy the same stability properties with respect to the whole state space? We develop reduction principles for stability, asymptotic stability, and attractivity which are applicable …
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Control of mechanically stable movement by spinalized frogs
… the spinal cord could be dictated by mechanical stability requirements for interacting with the environment or by particular performance advantages. Previous work in frogs and cats has shown that the isometric forces measured during movements evoked by intraspinal stimulation converge to a stable …
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Approximate Explicit MPC and Closed-loop Stability: Analysis based on PWA Lyapunov Functions
… e.g., in FPGA. To ensure that closed-loop stability properties are guaranteed, a stability analysis tool is proposed which exploits suitable and possibly discontinuous PWA Lyapunov-like functions. The tool requires solving offline a linear programming problem. Moreover, the tool is able to …
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Modeling and analysis of market share dynamics in a duopoly subject to affine feedback advertising policies and delays
… equilibria in identical locations, with the same stability properties. The introduction of a third set of undecided clients also motivates the introduction of a more elaborate model of market share dynamics based on the replicator-mutator model from evolutionary game theory. This is done by …
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A study of the feasibility of detecting primordial microscopic black hole remnants with the NOvA far detector
… Neutrino Experiment (DUNE). The origin, stability, properties, and energy loss mechanism of such objects are examined. The signals produced from the detectors should allow for discrimination between these microscopic black holes and other particles traversing the detector. Potential …
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ΕΠΙΔΡΑΣΗ ΤΗΣ ΥΓΡΑΣΙΑΣ ΣΤΑ ΚΥΜΑΤΑ ΒΑΡΥΤΗΤΑΣ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΟ ΔΙΑΤΜΗΤΙΚΟ ΣΤΡΩΜΑ
THE STABILITY PROPERTIES OF HYPERBOLIC TANGENT VELOCITY PROFILE IN A STRATIFIED BAUSSINESQ FLUID, ARE INVESTIGATED IN THE PRESENCE OF UNSTABLE MOISTURE LAYERS. NEW UNSTABLE MODES IN THE RANGE OF LARGE HORIZONTAL WAVELENGTHS ARE FOUNDWITH RESPECT TO THE CASE WHERE NO UNSTABLE MOISTURE LAYER EXSTS. …
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Stability results for constrained dynamical systems
… purpose of this dissertation is to investigate stability properties of two important classes of DAEs. We consider some special cases of Linear Time Invariant (LTI) DAEs with control inputs and outputs, and also a special class of Linear switched DAEs. In the first part of the thesis, we consider …
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Stability and efficiency properties of implicit Runge-Kutta methods
… two sections. The first section examines certain stability properties of implicit Runge-Kutta methods. In particular, a new stability property is defined, which is a modification to non-autonomous problems of A-stability, and its relation to B-stability is considered. A Runge-Kutta method is …
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The Production of Recombinant Immunoglobulin Superfamily Proteins in the Yeast Saccharomyces Cerevisiae
… they have very distinct expression and stability behaviors. In fact, in order to develop an efficient scTCR production strategy like that developed for scFvs, it was necessary to alter the characteristics of the protein itself to improve its processing and stability characteristics. …
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Gravitational Lensing and the Maximum Number of Images
… of observational verification, we analyze the stability properties of the symmetric maximal lensing configurations. Finally, for the cases of n=4, 5, and 6 point-mass lenses, we study asymmetric maximal lensing configurations and compare their stability properties against the symmetric case.
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The effects of thermal radiation on dry convection
… theoretical and numerical analyses of the stability properties, and various analyses of the weakly nonlinear convecting state. We prove that in these models, convection arises as monotonically growing cells, not as an oscillatory instability. That is, we prove exchange of stabilities. We …
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Asymptotic Analysis of Perturbations to Travelling Wave Solutions of Nonlinear Advection-Reaction-Diffusion Equations of Fisher Type
… equations of Fisher type. First we discuss the stability properties of the equations by writing each nonlinear equation as a system of two ordinary different equations and then analyzing the stability of their equilibrium solutions and plotting their trajectories in phase portraits. We then …
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