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Wyszukujesz frazę "Dwornicka, Renata" wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Tribological properties of oxide coatings produced on en aw-5251 alloy using different distances between electrodes
Autorzy:
Bara, Marek
Dwornicka, Renata
Powiązania:
https://bibliotekanauki.pl/articles/104094.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
anodic oxide coating
distance between electrodes
tribological properties
anodowa powłoka tlenkowa
odległość między elektrodami
właściwości trybologiczne
Opis:
The subject of the presented work was the analysis of the influence of the distance between the electrodes using in the coating process on the tribological properties of oxide coatings. Oxide coatings were prepared on EN AW-5251 aluminum alloy samples. The samples surfaces were subjected to hard anodizing process in a multicomponent electrolyte based on sulfuric acid with an addition of organic acids. Anodizing was carried out with a constant electric charge density of 180 A•min/dm2 . The distances between the electrodes for subsequent samples increased every 0.125 m up to 1 m. The tribological partner in a sliding couple with oxide layers was pin of PEEK/BG. Tribological tests were conducted on a T-17 tester in reciprocating motion, in technically dry friction conditions. Before and after tribological test, examination of the geometrical structure of counter-specimens’ surface was carried out using the Form Talysurf contact profilographometer, via a 3D method. The most satisfactory tribological parameters were obtained for the PEEK/BG association with the coating produced at a distance between the electrodes equal to 0.25 m.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 400-405
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The smoothed bootstrap fine-tuning
Autorzy:
Dwornicka, Renata
Goroshko, Andrii
Pietraszek, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/88564.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
smoothed bootstrap
statistic
design of experiments
numerical simulation
projektowanie eksperymentów
statystyka
symulacja numeryczna
Opis:
The bootstrap method is a well-known method to gather a full probability distribution from the dataset of a small sample. The simple bootstrap i.e. resampling from the raw dataset often leads to a significant irregularities in a shape of resulting empirical distribution due to the discontinuity of a support. The remedy for these irregularities is the smoothed bootstrap: a small random shift of source points before each resampling. This shift is controlled by specifically selected distributions. The key issue is such parameter settings of these distributions to achieve the desired characteristics of the empirical distribution. This paper describes an example of this procedure.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 716-723
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability of variability source detection in Shainins component search procedure
Autorzy:
Pietraszek, Jacek
Dwornicka, Renata
Goroshko, Andrii
Powiązania:
https://bibliotekanauki.pl/articles/104061.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
Component Search
bootstrap
Red X
Shainin method
wyszukiwanie komponentów
metoda Shainin
Opis:
Shainin's component search procedure uses variability source detection based on specific median test. This approach has only two triple subsets and the certainty of inference can be weak for this reason. This paper checks this approach by series of numerical simulations.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 358-362
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design Principles of Horizontal Drum Machines with Low Vibration
Autorzy:
Drach, Ilona
Goroshko, Andrii
Dwornicka, Renata
Powiązania:
https://bibliotekanauki.pl/articles/2023826.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
stiffness
imbalance
rotary drum machine
washing machine
vibration activity
self-balancing device
Opis:
Using the example of washing machines using the linear theory of vibrations, the dynamics of horizontal rotary drum machines is investigated and the basic requirements for their layout are formulated to reduce vibration activity. The mathematical equations of vibrations of the multiply connected system tub-drum on elastic suspensions are compiled for main types of washing machines and centrifuges with horizontal axis of rotation. The problem is solved in a linear setting based on the Lagrange equation of the second kind. The accuracy and adequacy of the mathematical model was tested directly on a full-scale object by measuring noise, vibrations, support forces and stress distribution in individual elements and units of the washing machine in the entire range of drum rotation frequencies. Investigations of the nature of system vibrations depending on changes in the position and attachment points of elastic and damping elements were carried out using simulation in the Simulink environment. As a result of the research, the basic requirements for the layout of horizontal rotary drum machines were experimentally confirmed. Experimental verification was carried out to confirm the results obtained. It has been experimentally proven that the improvement of the experimental setup to reduce its vibration activity increases the efficiency of using direct-acting liquid autobalancers.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 258--268
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The bootstrap method as a tool to improve the design of experiments
Autorzy:
Dwornicka, Renata
Radek, Norbert
Pietraszek, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/88607.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
bootstrap
statistics
design of experiments
numerical simulation
statystyka
projektowanie eksperymentów
symulacje numeryczne
Opis:
The paper considers the use of the bootstrap method to improve the determination of confidence intervals identified by the DOE (design of experiment) procedure. Two different approaches have been used: one that is appropriate for factorial designs and the other one relevant to the methodology of the response surface. Both approaches were tested on the real experiment datasets and compared with the results obtained from the classical statistical expressions based on well known asymptotic formulas derived from the distribution.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 724-729
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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