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Tytuł:
Neural network approach to compressor modelling with surge margin consideration
Autorzy:
Loryś, Sergiusz Michał
Orkisz, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2091364.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modelling
compressor map
neural-network
Opis:
Artificial neural networks are gaining popularity thank to their fast and accurate response paired with low computing power requirements. They have been proven as a method for compressor performance prediction with satisfactory results. In this paper a new approach of artificial neural networks modelling is evaluated. The auxiliary parameter of ‘relative stability margin Z’ was introduced and used in learning process. This approach connects two methods of compressor modelling such as neural networks and auxiliary parameter utilization. Two models were created, one with utilization of the ‘relative stability margin Z’ as a direct indication of surge margin of any estimated condition, and other with standard compressor parameters. The results were compared by determination of fitting, interpolation and extrapolation capabilities of both approaches. The artificial neural networks used during the process was a two-layer feed-forward neural-network with Levenberg–Marquardt algorithm with Bayesian regularization. The experimental data was interpolated to increase the amount of learning data for the neural network. With the two models created, capabilities of this relatively simple type of neural-network to approximate compressor map was also assessed.
Źródło:
Archives of Thermodynamics; 2022, 43, 1; 89--108
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Models of the reference departure and arrival ifr procedures for the purpose of research in RPAS integration in controlled airspace
Autorzy:
Lichoń, Daniel
Orkisz, Marek
Powiązania:
https://bibliotekanauki.pl/articles/243095.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
RPAS integration
SID
STAR
unmanned aviation
controlled airspace
controlled airports
Opis:
The air operations in controlled airspace performed according to Instrument Flight Rules (IFR) are composed of three main flight phases, i.e. departure, cruise, arrival. Controlled airspace is divided into the terminal area and en-route airspace. The terminal area encloses the departure and arrival phases while the en-route airspace encloses the cruise phase. The IFR procedures are designed for manned aviation to ensure the safety of air operations. Development of the aviation concerns among others the increase in the number of unmanned aviation operations. Currently, on the European level, there is an on-going, long-term program of integration of the unmanned aviation in the uniform (non-segregated) airspace. This work concerns the research in the integration of the Remotely Piloted Aircraft Systems (RPAS) in the IFR procedures of the controlled airports. The objective was to build the reference models of Standard Instrument Departure and Arrival Procedures (SID and STAR). Basing on the procedure design guidelines the models of procedural nominal track, tolerance area, obstacle clearance area, climb or descend gradient, manoeuvres in SID and STAR were done. The guidelines describe the operational minima thus the statistics of existing procedures was done to select the suitable procedure parameters such as a number of navigational points, segments lengths, altitudes, climb or descent gradients. Reference models of SID include straight departure and turning departure procedures. Reference models of STAR include non-precision approach procedures according to used navigational aids, i.e. GNSS, VOR. The reference procedures were numerically implemented which will be used in the further works on RPAS integration problem by simulations of the RPAS ability to execute of the SID and STAR.
Źródło:
Journal of KONES; 2019, 26, 3; 121-128
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteorologiczna osłona działań lotnictwa
Autorzy:
Jafernik, Henryk.
Wilczek, Zygmunt.
Ziarko, Janusz.
Współwytwórcy:
Orkisz, Marek. Recenzja
Data publikacji:
2000
Wydawca:
Warszawa
Tematy:
Meteorologia wojskowa lotnicza i satelitarna podręcznik recenzja
Lotnictwo wojskowe działania bojowe zabezpieczenie meteorologiczne podręcznik recenzja
Opis:
Recenzja podręcznika płk. dr. inż. Henryka Jafernika, ppłk. dr. Zygmunta Wilczaka i dr. inż. Janusza Ziarko pod tytułem "Meteorologiczna osłona działań lotnictwa".
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Influence of Adriblastin and Bleomycin on Wistar rat mothers and fetus development
Autorzy:
Sęk-Mastej, Anna
Galiniak, Sabina
Krawczyk-Marć, Izabela
Balawender, Krzysztof
Szymczak, Artur
Kaniewski, Maciej
Leksa, Natalia
Biesiadecki, Marek
Orkisz, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/454733.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
pregnancy
foetus
congenital defect
teratogen
Opis:
Introduction. Gestation is a very sensitive time both to mother and child. Any substance, factor, or environmental condition disturbing homeostasis may cause congenital defects, anomalies or even death. Teratology evaluates those potential factors and their influence. Also, medicinal products used during pregnancy may be teratogenic. Adriblastin, also known as Doxorubicin, and Bleomycin are widely used cytostatic drugs in oncology. Aim. Aim of this study was to evaluate the embryotoxic effects of Doxorubicin and Bleomycin in an animal model. Materials and methods. Fertilised Wistar rat females were given each drug intraperitoneally between the 8th and 15th gestation day, and compared to control group receiving placebo (distilled water, 0.9% NaCl). Another group received acetyl salicylic acid, as a model, well known teratogen. Changes in mothers’ weight from baseline, implantation of embryos, any discrepancies in mothers wombs and health as well as defects in fetuses were evaluated and compared. Fetus skeletons were stained by Dowson’s method to visualise bone defects. Results and conclusion. Both Adriblastin and Bleomycin were teratogenic, producing significantly more embryo absorptions, and fetal defects compared to placebo. The effects of the two cytostatics were similar to the model teratogen acetyl salicylic acid.
Źródło:
European Journal of Clinical and Experimental Medicine; 2018, 2; 85-91
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 28

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