Results 11 to 20 of about 2,965,478 (248)
Avoidance Control on Time Scales [PDF]
Journal of Optimization Theory and Applications, 2010 We consider dynamic systems on time scales under the control of two agents. One of the agents desires to keep the state of the system out of a given set regardless of the other agent's actions. Leitmann's avoidance conditions are proved to be valid for dynamic systems evolving on an arbitrary time scale.
Pawłuszewicz, E., Torres, D.F.M.
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Symmetric differentiation on time scales [PDF]
Applied Mathematics Letters, 2013 We define a symmetric derivative on an arbitrary nonempty closed subset of the real numbers and derive some of its properties. It is shown that real-valued functions defined on time scales that are neither delta nor nabla differentiable can be symmetric differentiable.
Brito da Cruz, A. M. C. +2 more
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The variational calculus on time scales [PDF]
International Journal for Simulation and Multidisciplinary Design Optimization, 2010 15 pages; Published in: Int. J. Simul. Multidisci. Des. Optim.
Delfim F.M. Torrest, Malinowska
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Liquidity crises on different time scales [PDF]
, 2015 We present an empirical analysis of the microstructure of financial markets and, in particular, of the static and dynamic properties of liquidity. We find that on relatively large time scales (15 min) large price fluctuations are connected to the failure
Corradi, Francesco +2 more
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Time scales in nuclear giant resonances [PDF]
, 2009 We propose a general approach to characterise fluctuations of measured cross sections of nuclear giant resonances. Simulated cross sections are obtained from a particular, yet representative self-energy which contains all information about fragmentations.
A. Bohr +11 more
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Time scales in cognitive neuroscience [PDF]
Frontiers in Physiology, 2013 Cognitive neuroscience boils down to describing the ways in which cognitive function results from brain activity. In turn, brain activity shows complex fluctuations, with structure at many spatio-temporal scales. Exactly how cognitive function inherits the physical dimensions of neural activity, though, is highly non-trivial, and so are generally the ...
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The Time Scale of Evolutionary Innovation
PLoS Computational Biology, 2014 A fundamental question in biology is the following: what is the time scale that is needed for evolutionary innovations? There are many results that characterize single steps in terms of the fixation time of new mutants arising in populations of certain size and structure.
Chatterjee, Krishnendu +3 more
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A Hierarchy of Time-Scales and the Brain
PLoS Computational Biology, 2008 In this paper, we suggest that cortical anatomy recapitulates the temporal hierarchy that is inherent in the dynamics of environmental states. Many aspects of brain function can be understood in terms of a hierarchy of temporal scales at which representations of the environment evolve. The lowest level of this hierarchy corresponds to fast fluctuations
Kiebel, SJ, Daunizeau, J, Friston, KJ
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Pair plasma relaxation time scales
, 2010 By numerically solving the relativistic Boltzmann equations, we compute the time scale for relaxation to thermal equilibrium for an optically thick electron-positron plasma with baryon loading. We focus on the time scales of electromagnetic interactions.
A. G. Aksenov +9 more
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Discounting in Games across Time Scales [PDF]
, 2010 We introduce two-level discounted games played by two players on a perfect-information stochastic game graph. The upper level game is a discounted game and the lower level game is an undiscounted reachability game.
A. Condon +11 more
core +4 more sources