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Wyświetlanie 1-3 z 3
Tytuł:
Power flows in a hydrostatic-mechanical transmission of a mining locomotive during the braking process
Autorzy:
Samorodov, Vadym
Bondarenko, Anatoliy
Taran, Igor
Klymenko, Iryna
Powiązania:
https://bibliotekanauki.pl/articles/1841202.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transmission
mine diesel locomotive
power flows
braking process
transmisja
górnicza lokomotywa spalinowa
przepływy mocy
proces hamowania
Opis:
This paper considers the braking process of a mine diesel locomotive with hydrostatic mechanical transmission (HSMT) operating according to the “input differential” scheme. Braking process modeling involves four implementation methods. Identification and systematization of basic regularities in the distribution of power flows within a closed transmission contour in the process of braking have been performed with the help of software support developed by means of MatLab/Simulink. The simulation results of braking due to the hydrostatic transmission and the braking system during the movement of a diesel locomotive in the transport and traction ranges are presented in the form of graphical correlations. The process of theoretical studies of the braking process of a diesel locomotive with HSMT operating according to the “input differential” scheme has helped determine that, in terms of deceleration at the expense of a hydrostatic drive (HSD) and braking system while preserving kinematic engine-wheels connection, it is not permitted to implement this method of braking process as it is followed by excess of the allowable value of working pressure differential within HSD up to 2.8 times.
Źródło:
Transport Problems; 2020, 15, 3; 17-28
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges to Ukraine’s Innovative Development in a Digital Environment
Autorzy:
Voronenko, Iryna
Klymenko, Nataliia
Nahorna, Olena
Powiązania:
https://bibliotekanauki.pl/articles/2201160.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovation
digitalization
evaluation
statistical data
competitiveness
statistical methodology
GII
DEA
Opis:
The purpose of the paper is to analyze the positioning of Ukraine in the global indices of innovative development and competitiveness, to evaluate the indicators of innovation activity and, based on the outcomes of the research, to determine the place of Ukraine in the global innovation space. The dynamics of innovation activity on an international scale based on the consolidated indicators of the Global Innovation Index are presented. Ukraine’s position in it and progress in achieving goals to better understand the processes that stimulate or constrain innovation are determined. Econometric methods to generalize the positioning of Ukraine in the global innovation space and the DEA method to study the relative individual effectiveness of the innovation environment and innovation activities in Europe are used.
Źródło:
Management and Production Engineering Review; 2022, 13, 4; 48--58
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local Wastewater Treatment by Effective Coagulants Based on Wastes
Autorzy:
Kyrii, Svitlana
Dontsova, Tetiana
Kosogina, Iryna
Astrelin, Ihor
Klymenko, Nataliya
Nechyporuk, Daria
Powiązania:
https://bibliotekanauki.pl/articles/124144.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
red mud
waste utilization
effective coagulant
coagulation
local wastewater treatment
adsorption
Opis:
The purpose of the research was to synthesize new effective and cheap coagulants from industrial wastes (red mud) and study their coagulation properties on model water of textile industries, as well as develop a closed scheme of local wastewater treatment using the synthesized coagulants. Liquid coagulants, synthesized with the simple method, have better performance than commercial FeCl3, since not only iron but also aluminum and titanium compounds are present in the synthesized liquid coagulants, which makes them more effective. For the synthesized coagulants with a dose of 10 mg/l, the removal efficiency of the dyes mixture from the water was 99.7%, while for the commercial FeCl3, with a 2.5 times higher dose – only 95.4%. In the case of creating closed scheme of treatment and usage of the treated water with the coagulation method, an additional sorption purification step from the trace concentrations of pollutants was proposed. The usage of the new coagulants, synthesized from the wastes of alumina production in the proposed scheme will not only help reduce the environmental burden by minimizing the wastewater discharges into sewerage, but also recycle the accumulated environmentally hazardous “red mud” waste into commercial products.
Źródło:
Journal of Ecological Engineering; 2020, 21, 5; 34-41
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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