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    Wyświetlanie 1-3 z 3
    Tytuł:
    Analysis of the Possibility of Using Dynamic Methods for Assessment of Investment Projects in the Domestic Foundry Industry
    Autorzy:
    Szymszal, J.
    Lis, T.
    Gajdzik, B.
    Kliś, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380393.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computer-aided foundry production
    dynamic methods for assessment
    investment projects
    efficiency calculus
    odlewnia
    komputerowe wspomaganie produkcji
    projekty inwestycyjne
    rachunek efektywności
    Opis:
    A comparative analysis involving the evaluation of the effectiveness of investment projects can be based on various rules indicating selection of the most favorable decisions. The dynamic methods for assessment of investment projects discussed in this article, which consider the possibility of modifying the predetermined investment options, are quite complex and difficult to implement. They are used both in the construction phase of the new company, as well as in its subsequent modernization. The assessments should be characterized by a high coefficient of the economic efficiency. The, observed in practice, high dynamic variability of both the external and internal conditions under which the company operates is the reason why in the process of calculating the economic efficiency of investment projects, there is a significant number of random parameters affected by high uncertainty and risk. Investments in the metallurgical industry are characterized by a relatively long cycle of implementation and operation. These are capital-intensive projects and often mistakenly taken investment decisions end in failure of the investment project and, consequently, in the collapse of the company. In addition, the applied methods of risk assessment of investment projects, especially the dynamic ones, should be fully understood by managerial staff and constitute an easy to use, yet accurate tool for improving the efficiency of the company.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 103-106
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Use of Modern Statistical Methods to Optimize Production Systems in Foundries
    Autorzy:
    Szymszal, J.
    Gajdzik, B.
    Kaczmarczyk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/379769.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    production of computer-aided
    foundry production
    quality of castings
    statistical methods
    forecasting
    wytwarzanie wspomagane komputerem
    produkcja w odlewni
    jakość odlewów
    metody statystyczne
    prognozowanie
    Opis:
    Conducting reliable and credible evaluation and statistical interpretation of empirical results related to the operation of production systems in foundries is for most managers complicated and labour-intensive. Additionally, in many cases, statistical evaluation is either ignored and considered a necessary evil, or is completely useless because of improper selection of methods and subsequent misinterpretation of the results. In this article, after discussing the key elements necessary for the proper selection of statistical methods, a wide spectrum of these methods has been presented, including regression analysis, uni- and multivariate correlation, one-way analysis of variance for factorial designs, and selected forecasting methods. Each statistical method has been illustrated with numerous examples related to the foundry practice.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 115-120
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Application of Numerical Methods to Evaluate the Viscosity of the Coating Using the Model Extraction Iida
    Autorzy:
    Biernat, S.
    Bydałek, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381499.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computer aided manufacturing
    numerical methods
    viscosity
    Iida model
    program SLAG-PROP
    refining capacity
    coating Using
    komputerowe wspomaganie produkcji
    metody numeryczne
    lepkość
    model Iida
    rafinacja
    powlekanie
    Opis:
    The article presents a reflection on the viscosity of the coating extraction using numerical methods. The viscosity of the coating slag is a factor affecting a high degree on the quality of the ongoing process of refining. Too high a viscosity will restrict the diffusion of impurities from the metal to the slag, in turn, too low a viscosity will cause spreading of slag in the vicinity of the furnace wall, and thus exposing the mirror of the liquid metal which may result in adverse effects of an oxidizing atmosphere. You should also remember that too low a viscosity can increase the loss of metal in the slag as well as hinder its recovery during casting. Using the materials database and numerical methods it is possible to determine the level of selected blends of slag viscosity. Additionally, in order to determine their usefulness in refining the values obtained can be confronted with laboratory tests using derivatograph. On the basis of the designated energy index Ew and mass index r can determine the suitability of a mixture of slag and its impact oxidizing or reducing agents.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3 spec.; 85-89
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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