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Wyszukujesz frazę "perturbation bound" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Ergodicity and perturbation bounds for inhomogeneous birth and death processes with additional transitions from and to the origin
Autorzy:
Zeifman, A.
Korotysheva, A.
Satin, Y.
Korolev, V.
Shorgin, S.
Razumchik, R.
Powiązania:
https://bibliotekanauki.pl/articles/331214.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
inhomogeneous birth process
inhomogeneous death process
ergodicity bound
perturbation bound
Opis:
Service life of many real-life systems cannot be considered infinite, and thus the systems will be eventually stopped or will break down. Some of them may be re-launched after possible maintenance under likely new initial conditions. In such systems, which are often modelled by birth and death processes, the assumption of stationarity may be too strong and performance characteristics obtained under this assumption may not make much sense. In such circumstances, time-dependent analysis is more meaningful. In this paper, transient analysis of one class of Markov processes defined on non-negative integers, specifically, inhomogeneous birth and death processes allowing special transitions from and to the origin, is carried out. Whenever the process is at the origin, transition can occur to any state, not necessarily a neighbouring one. Being in any other state, besides ordinary transitions to neighbouring states, a transition to the origin can occur. All possible transition intensities are assumed to be non-random functions of time and may depend (except for transition to the origin) on the process state. To the best of our knowledge, first ergodicity and perturbation bounds for this class of processes are obtained. Extensive numerical results are also provided.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 4; 787-802
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Weakly Bound States in Heterogeneous Waveguides: A Calculation to Fourth Order
Autorzy:
Amore, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032586.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
trapped modes
bound states
deformed waveguide
perturbation theory
Opis:
We have extended a previous calculation of the energy of a weakly heterogeneous waveguide to fourth order in the density perturbation, deriving its general expression. For particular configurations where the second and third orders both vanish, we discover that the fourth order contribution lowers in general the energy of the state, below the threshold of the continuum. In these cases the waveguide possesses a localized state. We have applied our general formula to a solvable model with vanishing second and third orders reproducing the exact expression for the fourth order.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1351-1357
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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