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Wyszukujesz frazę "Gurgul, P." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Hypergrammar-based parallel multi-frontal solver for grids with point singularities
    Autorzy:
    Gurgul, P.
    Paszyński, M.
    Paszyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/305343.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    hypergraph grammar
    direct solver
    h-adaptive finite element method
    NVIDIA CUDA GPU
    Opis:
    This paper describes the application of hypergraph grammars to drive a linear computational cost solver for grids with point singularities. Such graph grammar productions are the first mathematical formalisms used to describe solver algorithms, and each indicates the smallest atomic task that can be executed in parallel, which is very useful in the case of parallel execution. In particular,the partial order of execution of graph grammar productions can be found, and the sets of independent graph grammar productions can be localized. They can be scheduled set by set into a shared memory parallel machine. The graph-grammar-based solver has been implemented with NVIDIA CUDA for GPU. Graph grammar productions are accompanied by numerical results for a 2D case. We show that our graph-grammar-based solver with a GPU accelerator is, by order of magnitude, faster than the state-of-the-art MUMPS solver.
    Źródło:
    Computer Science; 2015, 16 (1); 75-102
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of a hyper-graph grammar system in adaptive finite-element computations
    Autorzy:
    Gurgul, P.
    Jopek, K.
    Pingali, K.
    Paszyńska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/331397.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    adaptive finite element method
    hypergraph grammar
    mesh-based computations
    metoda elementów skończonych
    gramatyka hipergrafu
    siatka obliczeniowa
    Opis:
    This paper describes application of a hyper-graph grammar system for modeling a three-dimensional adaptive finite element method. The hyper-graph grammar approach allows obtaining a linear computational cost of adaptive mesh transformations and computations performed over refined meshes. The computations are done by a hyper-graph grammar driven algorithm applicable to three-dimensional problems. For the case of typical refinements performed towards a point or an edge, the algorithm yields linear computational cost with respect to the mesh nodes for its sequential execution and logarithmic cost for its parallel execution. Such hyper-graph grammar productions are the mathematical formalism used to describe the computational algorithm implementing the finite element method. Each production indicates the smallest atomic task that can be executed concurrently. The mesh transformations and computations by using the hyper-graph grammar-based approach have been tested in the GALOIS environment. We conclude the paper with some numerical results performed on a shared-memory Linux cluster node, for the case of three-dimensional computational meshes refined towards a point, an edge and a face.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 569-582
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-dimensional hp-adaptive algorithm for continuous approximations of material data using space projection
    Autorzy:
    Gurgul, P.
    Sieniek, M.
    Paszyński, M.
    Madej, Ł.
    Collier, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/305268.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    adaptive finite element method
    projection operator
    digital material representation
    Opis:
    In this paper we utilize the concept of the L 2 and H 1 projections used to adaptively generate a continuous approximation of an input material data in the finie element (FE) base.This approximation, along with a corresponding FE mesh, can be used as material data for FE solvers. We begin with abrief theoretical background, followed by description of the hp -adaptive algorithm adopted here to improve gradually quality of the projections. We investigate also a few distinct sample problems, apply the aforementioned algorithms and conclude with numerical results evaluation.
    Źródło:
    Computer Science; 2013, 14 (1); 97-112
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Innovation technology for the production of massive slag ladles at the Krakodlew S.A. Foundry. Presentation of design works on research and development
    Autorzy:
    Paszkiewicz, M.
    Guzik, E.
    Kopyciński, D.
    Kalandyk, B.
    Burbelko, A.
    Gurgul, D.
    Sobula, S.
    Ziółko, A.
    Piotrowski, K.
    Bednarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840919.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    slag ladles
    ductile cast iron
    cast steel
    large castings
    massive castings
    kadzie żużlowe
    żeliwo sferoidalne
    staliwo
    odlewy wielkogabarytowe
    Opis:
    This article is a description of the progress of research and development in the area of massive large-scale castings - slag ladles implemented in cooperation with the Faculty of Foundry Engineering of UST in Krakow. Slag ladles are the one of the major castings that has been developed by the Krakodlew (massive castings foundry) for many years. Quality requirements are constantly increasing in relation to the slag ladles. Slag ladles are an integral tool in the logistics of enterprises in the metallurgical industry in the process of well-organized slag management and other by-products and input materials. The need to increase the volume of slag ladles is still growing. Metallurgical production is expected to be achieved in Poland by 2022 at the level of 9.4 million Mg/year for the baseline scenario - 2016 - 9 million Mg/year. This article describes the research work carried out to date in the field of technology for the production of massive slag ladles of ductile cast iron and cast steel.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 67-71
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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