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 13 of 13 for “"Unstable Systems"”.
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Iterative Rational Krylov Algorithm for Unstable Dynamical Systems and Genaralized Coprime Factorizations
Generally, large-scale dynamical systems pose tremendous computational difficulties when applied in numerical simulations. In order to overcome these challenges we use several model reduction techniques. For stable linear models these techniques work very well and provide good approximations for …
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A finite state machine framework for robust analysis and control of hybrid systems
Hybrid systems, describing interactions between analog and discrete dynamics, are pervasive in engineered systems and pose unique, challenging performance verification and control synthesis problems. Existing approaches either lead to computationally intensive and sometimes undecidable problems, or …
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Investigating the redispersibility of calcium carbonate
… The removal of the organic dispersant produced unstable systems supported by rheological evidence of shear thickening at high shear rates. The agglomerate strengths weakened with the removal of the organic. The particle size distribution analysis supports this but the rheological evidence tends …
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Emulsão : uma revisão bibliográfica
Emulsions are dispersed systems composed of at least two immiscible liquid phases and an emulsifying agent to stabilize the same. The dispersed phase is known as the internal phase and external phase as the dispersing form, however, are thermodynamically unstable systems. Although an ancient …
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Investigating the Relationships Between Disorder, Structure, and Dynamics in Amorphous Systems
… to investigate structural properties of active systems, we develop a novel method to generate static, finite packings in an artificial potential that reproduce the packing structures observed in a class of point-of-interest active self-propelled particle simulations. This allows us to compute …
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Equipartition and mass segregation : simulations of star clusters with two mass-components
… critical boundary between Spitzer-stable and -unstable systems is demonstrated in direct N-body models.
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Avaliação da estabilidade física de emulsões contendo limoneno
… This raises the emulsions are thermodynamically unstable systems comprised of microscopic droplets dispersed in anot her liquid having polarities different from each other, stabilized by one or more surfactant . The study conditions for the optimal balance of the proportion of surfactant used in …
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Fast stochastic model predictive control under parametric uncertainties
… the fast stochastic MPC can be used to control unstable systems The thesis also shows the applicability of linear input-output formulations of MPC to control a highly integrated nonlinear continuous crystallization process
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An approach for nonlinear control design via approximate dynamic programming
… for designing controllers for nonlinear dynamic systems. We are interested in state feedback controllers (policies) that stabilize the state in a given region around an equilibrium point while minimizing a cost functional that captures the performance of the closed loop system. The optimal …
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NLP in Education: Enhancing Teacher Wellbeing and Professional Practice
… sustainability within complex and often unstable systems. Neuro-Linguistic Programming (NLP) has a growing presence in practitioner-led coaching and wellbeing sectors internationally; however, its potential to support teacher sustainability in education remains under-examined and …
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Properties of the Merozygotes Associated with a Sulfonamide-Resistant Mutation in Pneumococcus
<p>Unstable prokaryotic strains arise occasionally under a variety of circumstances and with a variety of properties which make them amenable to genetic and physiological analysis at different levels of precision. A review of a number of such unstable systems, initially identified on the basis of a …
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Validated global multiobjective optimization of trajectories in nonlinear dynamical systems
… trajectories in continuous nonlinear dynamical systems that can provide rigorous, arbitrarily tight bounds on the objective values and state paths realized by (Pareto-)optimal trajectories. By controlling all sources of error, our resulting method is the first global trajectory optimization …
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Bus service design and schedule control
… impact the design and schedule of public transit systems (e.g. physical/geographical constraints, socio-economic and environmental conditions, stochastic events). Specifically, as a result from specialization and pursuit of economies of scale, the distribution of passengers origins and …