Results 261 to 270 of about 568,915 (313)
Harmonic Control of Dynamical Freezing in Programmable Rydberg Atom Arrays
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Double excitations in finite systems
The Journal of Chemical Physics, 2009Time-dependent density-functional theory (TDDFT) is widely used in the study of linear response properties of finite systems. However, there are difficulties in properly describing excited states, which have double- and higher-excitation characters, which are particularly important in molecules with an open-shell ground state.
Romaniello, Pina +6 more
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Generator Excitation Loss Detection on Various Excitation Systems and Excitation System Failures
2020Generating steadiness of synchronous generator is highly dependent on their exciter as the direct current from excitation system sustains stator and rotor windings magnetically coupled. But generator loss of excitation weakens stator and rotor coupling which result in mechanical and electrical power imbalance and rotor speed rise beyond synchronous ...
Alganesh Ygzaw +2 more
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On the role of frustration in excitable systems
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2010We study the role of frustration in excitable systems that allow for oscillations either by construction or in an induced way. We first generalize the notion of frustration to systems whose dynamical equations do not derive from a Hamiltonian. Their couplings can be directed or undirected; they should come in pairs of opposing effects like attractive ...
Pablo, Kaluza, Hildegard, Meyer-Ortmanns
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Amplidyne main exciter excitation system
Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1961The amplidyne exciter combines the basic characteristics of a conventional commutator-type exciter with the buckboost amplidyne features presently used for voltage regulators. The power required to control this exciter is small, permitting new types of voltage regulators to be used and additional, previously impossible exciter functions to be performed.
L. M. Harvey +3 more
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Adiabatic excitation of multilevel systems
Physical Review A, 1985We derive and discuss the behavior of several multilevel models relevant to the problem of molecular multiphoton excitation under the action of a quasimonochromatic laser field, the amplitude of which rises slowly and falls rapidly on a certain internal time scale.
, Peterson, , Cantrell
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Emulation of IEEE Excitation System Models Using Micro-Alternator’s Excitation System
2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), 2020This paper proposes an approach to emulate the behaviour of different IEEE excitation system models or industry provided excitation system models using a micro-alternator in the laboratory. An IGBT based buck converter is used as an exciter for the alternator.
Tanmay Mishra, Gurunath Gurrala
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Controllability of Excitable Systems
Bulletin of Mathematical Biology, 2001Mathematical models of cell electrical activity typically consist of a current balance equation, channel activation (or inactivation) variables and concentrations of regulatory agents. These models can be thought of as nonlinear filters whose input is some applied current I (possibly zero) and output is a membrane potential V. A natural question to ask
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Solitonlike excitations in biological systems
Physical Review A, 1985A model for solitonlike excitation in DNA is presented and assessed in the context of previous models of collective excitations in other biological systems. A qualitative analysis describes the mechanisms of some DNA function, in particular opening of DNA base pairs to initiate protein synthesis.
, Balanovski, , Beaconsfield
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