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Wyszukujesz frazę "Szumski, P." wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Optimization of the position of the local distribution centre of the regional post logistics network
Autorzy:
Droździel, P.
Wińska, A.
Madleňák, R.
Szumski, P.
Powiązania:
https://bibliotekanauki.pl/articles/375506.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
vehicle routing problem
postal network
optimization
p-median problem
sieć pocztowa
optymalizacja
Opis:
The phenomenon of the present postal services is the fact that, customers expect the lowest price while maintaining the availability, security and on time delivery of mail items. We can find that, the costs associated with transport of the postal substrate is one of the most important factors affecting the total cost of the postal services. These transport costs depend on various factors such as the investment in vehicles purchase, operational costs of the postal vehicles (costs of maintenance, repairs, fuel costs of the vehicle, etc.) labour costs of the drivers and so on. For this reason, it is important to find such an operational - organizational solutions that can reduce the costs associated with the transportation of postal shipments, resulting in reducing the total cost of postal services. One option to do this is to minimize the length of postal transportation routes. This article presents the approach based on the application of graph theory to optimize existing connections of postal logistics network. Published results is oriented to revaluate existing position of local centre and find a location for the new local distribution centre potentially. New location of local distribution centre can to optimize (minimize) the total transport costs of the local postal transportation network in area of the Lublin Province.
Źródło:
Transport Problems; 2017, 12, 3; 43-50
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of air cooling and air-jet vortex generator on flow structure in turbine passage
Autorzy:
Szwaba, R.
Flaszyński, P.
Szumski, J. A.
Doerffer, P.
Powiązania:
https://bibliotekanauki.pl/articles/1938634.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska
Tematy:
shock wave
separation control
air-jet vortex generator
blade cooling
Opis:
The paper concerns the experimental investigations and numerical simulations of a high loaded model of a turbine blade. An increase in the blade load leads to enlargement of a local supersonic zone terminated by a shock wave on the suction side. The Mach number upstream of the shock reaches up to 1.6. The interaction of the shock wave with a boundary layer at such a high Mach number leads to a strong separation. Streamwise vortices generated by air-jets were used for the interaction control. The work presents the experimental and numerical results of the application of an air-jets vortex generator on the suction side of cooled turbine blades. Very interesting results were obtained in the context of the air cooling and air-jet vortex generator influence on the flow structure in the turbine passage.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 2; 153-166
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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