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Wyszukujesz frazę "Bayram, U." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Tolerance Analysis with Multiple Surrogate Models
Autorzy:
Bayram, U.
Acar, E.
Powiązania:
https://bibliotekanauki.pl/articles/1402505.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
02.70.-c
Opis:
Design and analysis of modern engineering systems are complicated, mostly relying on computational analyses codes and hence often computationally expensive. Meanwhile, improved computer-aided design and numerical simulation methods are used extensively in the design process. Even continuing growth of computing power and speed, computationally cheap and reliable models or simulation techniques are not available, at least as ready-to-use computer analysis codes. The necessity of tolerance analysis takes important place at the same time with improved CAD and computer based process planning, because of high quality production requirements, and reduces manufacturing costs. Simulation based design and optimization becomes the only option to meet the specifications, and improves the system reliability. In the last few decades, the use of surrogate models has achieved significant advantages, because they provide fast computation and design investigation as they replace computationally expensive to run computer analyses with cheap to run approximations. Surrogate models also simplify the integration of analyses codes to optimization and reliability assessment studies. In this paper, response surface and Kriging surrogate models are used within a Monte Carlo simulation framework for tolerance analysis. As an illustrative example problem, tolerance analyses of a clutch assembly with nonlinear objection function are used. The effects of the surrogate model parameters (e.g., the use of different regression polynomials) and the number of training points on tolerance analysis are explored.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-447-B-449
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluoride Levels in the Eastern Black Sea Basin Streams, Turkey
Autorzy:
Bayram, A.
Satilmiş, U.
Nas, S.
Kemer, B.
Powiązania:
https://bibliotekanauki.pl/articles/1031272.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
92.40.Qk
92.40.qf
Opis:
The aim of this study is to monitor the fluoride ion (F¯), as well as chloride ion (Cl¯), variation in the Eastern Black Sea Basin streams, and to evaluate drinking water quality of these streams, with reference to national and international directives and guidelines. The water samples (240) were semimonthly collected from three surface water resources, namely from the Değirmendere and Galyan streams in Trabzon Province, the biggest city on the Southeastern Black Sea Coast with a total population of 768 417, and the Harşit Stream in Gümüşhane and Giresun provinces. The monitoring results have revealed that the average F¯ concentration had varied between 0.154 and 0.200 mg/l in the Değirmendere Stream and between 0.156 and 0.163 mg/l in the Galyan Stream, respectively. However, the treated stream waters had lower F¯ concentrations, varying between 0.010 and 0.080 mg/l, than the untreated stream waters. In the Harşit Stream, the average F¯ concentrations were at relatively higher values, which ranged from 0.211 to 0.296 mg/l, in the uppermost stations, however showed a steadily decreasing trend throughout the lowermost stations and fell from 0.230 to 0.141 mg/l due to the hydropower dam reservoirs, namely Torul, Kürtün, and Akköy, operated in the watershed. The average Cl¯ concentrations have varied between 2.00 and 6.48 mg/l. On the one hand, the waters from the Değirmendere, Galyan, and Harşit streams are classified as high quality, considering the upper threshold values of 1.5 mg F¯/l and 250 mg Cl¯/l. On the other hand, these streams can be regarded as the fluoride-poor water resources.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 861-865
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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