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 898 for “"Time scales"”.
-
Time Scales, Coherency, and Weak Coupling
In this thesis we study a relation between time scales and structural properties of a class of systems represented by power systems. First, the time scale decomposition of linear time invariant systems is studied. The properties of the time scale decomposition are shown to be defined by properties …
-
Extension of gyrokinetics to transport time scales
… assumed to be constant for turbulence saturation times, and only the turbulent electromagnetic fluctuations are calculated. Due to the success of these models, new massive simulations are being built to self-consistently determine the radial profiles of density and temperature. However, these new …
-
Synchronization in complex systems with multiple time scales
… in complex dynamical systems exhibiting multiple time scales have been analyzed. Multiple time scales can be active in different manners. Three different systems have been analyzed with different methods from data analysis. The first system studied is a large heterogenous network of bursting …
-
Opial's Inequality on Time Scales and an Application
… theory of calculus for dynamic equations on time scales (which unifies discrete and continuous systems), in this project we give some basic Opial type dynamic Inequalities. We discuss the background developed for Opial Inequalities which have many important applications both in the continuous …
-
Opial's Inequality on Time Scales and an Application
… theory of calculus for dynamic equations on time scales (which unifies discrete and continuous systems), in this project we give some basic Opial type dynamic Inequalities. We discuss the background developed for Opial Inequalities which have many important applications both in the continuous …
-
Characterization of precipitation events on different space-time scales
We have highligthed the importance of meteorological measurements,using a unseen instrument:Pludix, that is a Present Weather Sensor working in the modern forecast way called 'now casting', that is a very short-term forecasting based on remote sensing.Being a unseen instrument, to value the good …
-
Stability of non-diagonalizable switched linear systems on time scales.
… the stability of switched linear systems on time scales using Lyapunov stability theory. First, we focus on the most general case, nondiagonalizable systems with arbitrary switching. Subsequently, a constrained switching case is investigated. Several examples are given for both cases. …
-
Time-scales of passive tracers in the ocean with paleoapplications
Quantifying time-responses of the ocean to passive and active tracers is critical when interpreting paleodata from sediment cores. Surface-injected tracers are not spreading instantaneously or uniformly throughout the ocean. To obtain insights into these time-scales, a transition matrix is used to …
-
Space and time scales of low frequency variability in the ocean
… be derived from observations: (i) satellite altimetry measurements yield the surface eddy kinetic energy wavenumber and frequency spectra and the geographic distribution of surface eddy kinetic energy magnitude, (ii) XBT measurements yield the temperature wavenumber spectra, (iii) current meter …
-
Modeling larger length and time scales in machine learning force fields
… describe the collective motion of atoms over time, enabling the study of fundamental processes across physics, chemistry, and biology. This has established molecular dynamics as a cornerstone of modern science and improving its accuracy has a long standing history in the computational …
-
Calculus of Variations on Time Scales and Its Applications to Economics
The goal of time scale research is to progress the development of a harmonized theory that is all encompassing of the more commonly known specialized forms. The main results of this paper is the presentation of the Ramsey model which can be written using both the A and V operators, and solved using …
-
Asymptotic expansions and stability of hybrid systems with two-time scales
… the main ingredients of our models is the two-time-scale formulation. Under broad conditions, asymptotic expansions are developed for the solutions of the systems of backward equations for switching diffusion in two classes of models, namely, fast switching systems and fast diffusion systems. …
-
Anterior Cingulate Function Across Multiple-Time Scales Shapes Learning and Memory
… (ACC),has critical functions across multiple time-scales,from minutes to days-long learning,to weeks-long memory consolidation.The prefrontal cortex, and particularly the ACC portion, is known to be important for goal-directed learning, especially as the relationship between our actions …
-
Denudation processes in a tectonically active rift on different time scales
… the low-strain rift on centennial to millennial timescales, it may be hypothesized that erosion and sedimentation processes impacted by climate shifts associated with pronounced changes in the availability in moisture may have left important imprints in the landscape. In this thesis I combined …
-
Probability theory on time scales and applications to finance and inequalities
… dissertation, the recently discovered concept of time scales is applied to probability theory, thus unifying discrete, continuous and many other cases. A short introduction to the theory of time scales is provided. Following this preliminary overview, the moment generating function is derived …
-
Decomposition of Time Scales in Linear Systems and Markovian Decision Processes
… thesis we establish how systems having this "two-time-scale" property can use singular perturbation modeling to make this property explicit enabling various reduced order analysis and design techniques to be applied. For deterministic linear time-invariant systems, various techniques for obtaining …
-
Improving the anticipation of potential tornado intensity across different time scales
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
-
Space and time scales of low frequency variability in the ocean
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998.
-
Asymptotic Properties Of Markov Modulated Sequences With Fast And Slow Time Scales
… of Markov modulated random processes having two-time scales. The model contains a number of mixing sequences modulated by a switching process that is a discrete-time Markov chain. The motivation of our study stems from applications in manufacturing systems, communication networks, and economic …
-
A general linear systems theory on time scales : transforms, stability, and control.
… examine linear systems theory in the arbitrary time scale setting by considering Laplace transforms, stability, controllability, and realizability. In particular, we revisit the definition of the Laplace transform by Bohner and Peterson in [10]. We provide sufficient conditions for a given …
Page 1 of 45