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Wyszukujesz frazę "Sładkowski, Aleksander" wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Application of local exhaust systems to reduce pollution concentration near the road
    Autorzy:
    Biliaiev, Mykola
    Pshinko, Oleksandr
    Rusakova, Tetiana
    Biliaieva, Viktoriia
    Sładkowski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/1841237.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    automobile transport
    pollution concentration
    two-level exhaust system
    transport samochodowy
    stężenie zanieczyszczeń
    dwupoziomowy układ wydechowy
    Opis:
    In this study, the methodological foundations of the technology for the local reduction of chemical pollution from vehicles were improved through the use of twolevel suction units and guide plates of various lengths installed on the nozzles of the suction devices. A program has been developed for the numerical calculation of the carbon monoxide concentration field for evaluating the efficiency of using two-level exhaust systems with different lengths of guide plates on the gas flow selection pipes. The solution of the equations of hydrodynamics and mass transfer is carried out on the basis of finite-difference methods. A number of physical and computational experiments have been carried out; it has been established that the concentration of carbon monoxide in the zone of two-level suctions location decreases by 46-68%.
    Źródło:
    Transport Problems; 2020, 15, 4, cz. 1; 137-148
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computing model for simulation of the pollution dispersion near the road with solid barriers
    Autorzy:
    Biliaiev, Mykola
    Pshinko, Oleksandr
    Rusakova, Tetiana
    Biliaieva, Viktoriia
    Sładkowski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2098117.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    automobile transport
    pollution concentration
    solid barrier
    transport samochodowy
    koncentracja zanieczyszczeń
    stała bariera
    Opis:
    In this study, a numerical model is proposed for calculating pollution zones near the road, taking into account the geometry of the automobile transport meteorological conditions, the location of the barriers and their height, and the chemical transformation of nitrogen oxides in the atmospheric air. The numerical solution is based on the integration of the mass transfer equations using the finite-difference method. To determine the components of the air flow velocity vector, a two-dimensional model of the potential flow is used, where the Laplace equation for the velocity potential is the modeling equation. Based on this numerical model, a software package has been developed that allows computational experiments and does not require large expenditures of computer time. Based on the results obtained, an assessment was made of the effectiveness of the use of barriers to reduce the level of air pollution near highways. It has been established that the use of barriers of different heights reduces the level of pollution behind the road by approximately 20-50%.
    Źródło:
    Transport Problems; 2021, 16, 2; 73--86
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical modeling of the aeroion mode in a car
    Autorzy:
    Biliaiev, Mykola
    Pshinko, Oleksandr
    Rusakova, Tetiana
    Biliaieva, Viktoriia
    Sładkowski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2203882.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    negative ions
    car ionizer
    mathematical modeling
    car passenger
    comfort
    jony ujemne
    jonizator samochodowy
    modelowanie matematyczne
    pasażer
    komfort
    Opis:
    In this study, a mathematical method is proposed for calculating the concentration field of air ions of different polarities and dust levels in the passenger compartment, taking into account the geometry of the passenger compartment and seats, shelves, and other internal elements of the passenger compartment. The method also takes into account changes in the rate of the air flow ventilation, the location and number of ionizers, and sources of positive ions and dust, taking into account their different intensities and locations. On the basis of a numerical model for this method, software has been developed that allows users to carry out computational experiments without requiring much time for calculation. Based on the results, the optimal location of the ionizer in the passenger compartment of the car was determined to ensure comfortable conditions for the stay of passengers, which favorably affects their health. It has been found that the presence of two ionizers is optimal for creating comfort in the car with an ionization intensity of Qn= 0.47 ×1010 ions/s located at the top of the car. If there is one ionizer located on the dashboard or at the top of the car with a higher ionization rate than ions/s, it is not possible to simultaneously provide optimal ionization parameters for passengers in the front and rear seats of the car.
    Źródło:
    Transport Problems; 2022, 17, 2; 19--32
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozmieszczenie zapasów w magazynie z uwzględnieniem czasu transportu
    Locating Goods in Warehouse Taking into Account the Transport Time
    Autorzy:
    Mrówczyńska, Bogna
    Sładkowski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/590900.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Gospodarka magazynowa
    Magazynowanie
    Zarządzanie magazynem
    Inventory management
    Storage
    Warehouse management
    Opis:
    The paper deals with a problem of proper distribution of goods on warehouse shelves. There is formulated the task of minimising the travel time of forklift from the shelves where goods are stored to release zone. The evolutionary algorithm was used to solve it.
    Źródło:
    Studia Ekonomiczne; 2013, 143; 301-31
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing logistic factors and forecasting their impact on economic growth: the example of Kazakhstan
    Autorzy:
    Raimbekov, Zhanarys
    Sharipbekova, Kunduz
    Syzdykbayeva, Bakyt
    Turginbayeva, Ardak
    Sładkowski, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/2203876.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Opis:
    This article assesses the impact of the development of logistics systems (LS) on the efficiency of the economy. A multi-level methodology for assessing the impact of LS on the economy consisting of six stages (transport, investment, economic, information, material and technical, labor and infrastructure) is proposed using a dynamic structural model for a group of macroeconomic logistical factors for the period 2009-2020 for the republic and the regions of Kazakhstan. Their close relationship with economic growth has been established. Based on the results of factorial and index methods of analysis, mechanisms of differentiation in the management of the regional economy are proposed based on the level of development of logistics and their impact on the growth of the regional economy. Four groups of regions are identified according to the level of development of logistics and their impact on the economy, and directions for their further development are proposed. The forecast is based on the studied factors up to 2030. In particular, it has been established that for the long-term development of the economy of Kazakhstan, the development of agriculture and industry, investment in fixed assets, freight turnover, the availability of vehicles, wages, communication services, and the density of the railway network are important factors.
    Źródło:
    Transport Problems; 2022, 17, 4; 41--54
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Failure Mode and Effect Analysis of Air Cargo Freight Services Provider
    Autorzy:
    Sładkowski, Aleksander
    Cieśla, Marian
    Powiązania:
    https://bibliotekanauki.pl/articles/503816.pdf
    Data publikacji:
    2018
    Wydawca:
    Międzynarodowa Wyższa Szkoła Logistyki i Transportu
    Tematy:
    Transport
    Opis:
    In the theoretical part, this article presents the basic conditions for the organization of air transport cargo divided into different types of cargo shipments. Then the analysis of the Polish market of air cargo shipments is presented, taking into account the type of companies, airlines and airports that support them. In the research part, an FMEA analysis of an entity providing air cargo transport organization services was made, presenting several disadvantages and possible remedial actions that contribute to the improvement of the quality of services.
    Źródło:
    Logistics and Transport; 2018, 38, 2; 69-76
    1734-2015
    Pojawia się w:
    Logistics and Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increasing the resource of milling cutters used to process the locomotive wheelsets. Part 2: Study of stressed-deformed state
    Autorzy:
    Sładkowski, Aleksander
    Proydak, Yuriy
    Ruban, Vladislav
    Powiązania:
    https://bibliotekanauki.pl/articles/1841204.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    locomotive wheelsets
    milling machine
    finite element analysis
    cylindrical cutting tools
    milling cutter
    zestaw kołowy lokomotywy
    frezarka
    analiza elementów skończonych
    cylindryczne narzędzie skrawające
    frez
    Opis:
    The article deals with the stress-strain state of the cutters used in the mills of a new design for the restoration of the working surfaces of locomotive wheels. A comparative analysis of stresses in the cutters was carried out using the finite element method, which showed a significant advantage of the new technical solution, the novelty of which is confirmed by the patent.
    Źródło:
    Transport Problems; 2020, 15, 3; 139-151
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-criteria choice of the region for the construction of a logistics center based on AHP: case study for Kazakhstan
    Autorzy:
    Sładkowski, Aleksander
    Teltayev, Bagdat
    Izteleuova, Madina
    Powiązania:
    https://bibliotekanauki.pl/articles/1841186.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    logistics center
    transportation infrastructure
    territorial location
    priority field
    AHP
    centrum logistyczne
    infrastruktura transportu
    lokalizacja terytorialna
    obszary priorytetowe
    Opis:
    The current state of the regional market of transport and logistics services in Kazakhstan is characterized by a disparity between the increasing demand for Logistics services and the lack of logistics capacity. In this article, the authors propose a method for determining the most promising areas of the Republic of Kazakhstan for the construction of a logistics center, based on the Analytic Hierarchy Process (AHP).
    Źródło:
    Transport Problems; 2020, 15, 2; 119-131
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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