Temat: exit time - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Estimates for the distribution of the first exit time of α-stable processes
Autorzy:: Cupała, Wiesław
Powiązania:: https://bibliotekanauki.pl/articles/729864.pdf
Data publikacji:: 2002
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: first exit time
α-stable processes
Opis:: The Varopoulos-Hardy-Littlewood theory and the spectral analysis are used to estimate the tail of the distribution of the first exit time of α-stable processes.
Źródło:: Discussiones Mathematicae Probability and Statistics; 2002, 22, 1-2; 53-59
1509-9423
Pojawia się w:: Discussiones Mathematicae Probability and Statistics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Heaping Effect in the Survey Data on the Number of Friends
Autorzy:: Nawojczyk, M.
Stojkow, M.
Żuchowska-Skiba, D.
Krawczyk, M.
Kułakowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/1029538.pdf
Data publikacji:: 2018-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: social systems
random walk
exit time
incomplete knowledge
Opis:: The number of acquaintances is relevant for modeling social networks. Here we consider the data on the declared number of friends, as collected in 2000, 2007 and 2015 from Polish respondents above the age of 50. We demonstrate that the answers on the number of friends show sharp maxima at 10, 15, 20 and sometimes 30, which accompany a broader peak between 0 and 8. These results do not change qualitatively with sex and age of the respondents. The effect, known as data heaping, can be detected as a deviation from the Benford law.
Źródło:: Acta Physica Polonica A; 2018, 133, 6; 1417-1420
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Water-exit process modeling and added-mass calculation of the submarine-launched missile
Autorzy:: Yang, J.
Feng, J.
Li, Y.
Liu, A.
Hu, J.
Ma, Z.
Powiązania:: https://bibliotekanauki.pl/articles/260251.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: submarine-launched missile
fluid-structure interaction
water-exit dynamic model
time-varying added-mass
numerical simulation
Opis:: In the process that the submarine-launched missile exits the water, there is the complex fluid solid coupling phenomenon. Therefore, it is difficult to establish the accurate water-exit dynamic model. In the paper, according to the characteristics of the water-exit motion, based on the traditional method of added mass, considering the added mass changing rate, the water-exit dynamic model is established. And with help of the CFX fluid simulation software, a new calculation method of the added mass that is suit for submarine-launched missile is proposed, which can effectively solve the problem of fluid solid coupling in modeling process. Then by the new calculation method, the change law of the added mass in water-exit process of the missile is obtained. In simulated analysis, for the water-exit process of the missile, by comparing the results of the numerical simulation and the calculation of theoretical model, the effectiveness of the new added mass calculation method and the accuracy of the water-exit dynamic model that considers the added mass changing rate are verified.
Źródło:: Polish Maritime Research; 2017, S 3; 152-164
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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