Temat: 05.10.-a - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dynamics of the Belief Propagation for the Ising Model
Autorzy:: Siudem, G.
Świątek, G.
Powiązania:: https://bibliotekanauki.pl/articles/1388282.pdf
Data publikacji:: 2015-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.10.-a
05.45.-a
89.65.-s
Opis:: The Belief Propagation algorithm is a popular technique of solving inference problems for different graph-like structures. We present a discussion of the dynamics of that algorithm for the Ising model on the square lattice. Our main goal was to describe limit fixed points for that algorithm, which are strictly connected with the marginal probabilities and stationary points of the Bethe Free Energy. Analytical considerations provide an exact analysis of a class of symmetrical points while numerical simulations confirm that for small lattices there are no non-symmetrical points. Notwithstanding the prevalent use of the Belief Propagation as an inference tool we present a sociophysical interpretation of its dynamics. In that case our considerations may be viewed as an investigation of the possible fixed points of the social dynamics.
Źródło:: Acta Physica Polonica A; 2015, 127, 3A; A-145-A-149
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Fatigue Test with Stochastic Differential Equation Modeling
Autorzy:: Eroglu, E.
Guney, I.
Gunes, I.
Powiązania:: https://bibliotekanauki.pl/articles/1490739.pdf
Data publikacji:: 2012-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.10.Gg
81.40.Np
05.45.-a
Opis:: In this study, a mathematically polymeric insulator material is modeled which is used as a solid insulator in the industry. ASTM D 2303 in inclined plane test method is utilized in order to observe mechanical effect of vibration. The materials have different deformation times before they are fatigued or not fatigued. Our goal is the mathematical model which has materials at progressive times.
Źródło:: Acta Physica Polonica A; 2012, 121, 1; 36-38
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Intrinsic Rhythmic Fluctuation of Membrane Voltage Evoked by Membrane Noise in the Hodgkin-Huxley System
Autorzy:: Kuang, S.
Wang, J.
Zeng, T.
Powiązania:: https://bibliotekanauki.pl/articles/1538607.pdf
Data publikacji:: 2010-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.45.-a
87.10.-e
Opis:: We study the influence of membrane noise on the fluctuations of membrane voltage in the Hodgkin-Huxley neuronal system for the giant axon of squids. We find that the resting potentials of membrane patches in the absence of any external stimulus, exhibit apparent rhythmic fluctuation behaviors. The intrinsic fluctuation frequencies of membrane voltage, due to channel noise, thermal noise, or both, roughly share the same frequency ranges, despite that the fluctuations arisen from the former noise are overwhelmingly larger in amplitude than that from the latter. We also show that the rhythmic fluctuations can help enhance the encoding of weak signals within the rhythmic frequencies ranges and thus contribute positively to the information processing in the nervous system.
Źródło:: Acta Physica Polonica A; 2010, 117, 3; 435-438
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Chaotic Dynamics of a Linear Chain of Periodically Stimulated Neurons with Random Synaptic Connections
Autorzy:: Kosiński, R. A.
Krawiecki, A.
Sukiennicki, A.
Powiązania:: https://bibliotekanauki.pl/articles/2027444.pdf
Data publikacji:: 2001-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.10.+e
05.45.-a
Opis:: Dynamics of a neural network in the form of a linear chain of artificial neurons S$\text{}_{i}$∈(-1,1) influenced by an external sinusoidal stimulation is investigated as a function of the range k of synaptic connections with random values. Time evolution of the network is periodic for small k, however, clusters of neurons oscillating with a triple period of external stimulation, with quasiperiodic or with chaotic time evolution may occur. For increasing k the number and width of the chaotic clusters increase and for k >4 the chaotic motion occurs in the whole network. A route to chaos in the considered system is discussed.
Źródło:: Acta Physica Polonica A; 2001, 100, 1; 89-99
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Asymmetry Coefficients as Indicators of Chaos
Autorzy:: Wąż, P.
Bielińska-Wąż, D.
Powiązania:: https://bibliotekanauki.pl/articles/1584980.pdf
Data publikacji:: 2009-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.70.Rr
95.10.Fh
05.45.-a
05.45.Gg
05.45.Tp
Opis:: The aim of this paper is to present a new simple indicator of chaos derived from the dynamics of the motion. For this purpose statistical methods are used. A function describing the motion of the analyzed system (in the example under consideration, the time dependence of the angle of a damped driven pendulum, ω(t)) is recorded in time intervals t∊〈 $T_{s}$, $T_{f_{k}}$〉, k = 1, 2,...K, with $T_{f_{k}}$ > $T_{f_{k-1}}$. Each of the recorded functions is considered as a statistical distribution. The asymmetry coefficients of the set of distributions form a series and their behavior in periodic and chaotic regions is compared. It is shown that the behavior of this series in the chaotic and in the periodic regimes is entirely different. The changes of the asymmetry coefficients for the periodic cases are very regular and for the chaotic ones - random. In periodic cases, the coefficients converge to zero when the length of the distribution increases.
Źródło:: Acta Physica Polonica A; 2009, 116, 6; 987-991
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: Asymmetry Coefficients as Indicators of Chaos: Hyperchaotic Qi System
Autorzy:: Wąż, P.
Bielińska-Wąż, D.
Powiązania:: https://bibliotekanauki.pl/articles/1400122.pdf
Data publikacji:: 2013-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 02.70.Rr
95.10.Fh
05.45.-a
05.45.Gg
05.45.Tp
Opis:: Statistical properties of the hyperchaotic Qi system are studied. The theory, recently formulated and applied for the damped driven pendulum, is used in this investigation. Asymmetry coefficients, related to the statistical moments of distributions composed from the time-series, are shown to behave in a different way for periodic, chaotic and hyperchaotic solutions and are proposed as indicators of chaos and hyperchaos.
Źródło:: Acta Physica Polonica A; 2013, 123, 4; 647-650
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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