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Wyszukujesz frazę "Janicki, Zbigniew." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Approximation of stochastic differential equations driven by α-stable Lévy motion
    Autorzy:
    Janicki, Aleksander
    Michna, Zbigniew
    Weron, Aleksander
    Powiązania:
    https://bibliotekanauki.pl/articles/1339273.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    α-stable Lévy motion
    convergence of approximate schemes
    stochastic differential equations with jumps
    stochastic modeling
    Opis:
    In this paper we present a result on convergence of approximate solutions of stochastic differential equations involving integrals with respect to α-stable Lévy motion. We prove an appropriate weak limit theorem, which does not follow from known results on stability properties of stochastic differential equations driven by semimartingales. It assures convergence in law in the Skorokhod topology of sequences of approximate solutions and justifies discrete time schemes applied in computer simulations. An example is included in order to demonstrate that stochastic differential equations with jumps are of interest in constructions of models for various problems arising in science and engineering, often providing better description of real life phenomena than their Gaussian counterparts. In order to demonstrate the usefulness of our approach, we present computer simulations of a continuous time α-stable model of cumulative gain in the Duffie-Harrison option pricing framework.
    Źródło:
    Applicationes Mathematicae; 1996-1997, 24, 2; 149-168
    1233-7234
    Pojawia się w:
    Applicationes Mathematicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ domieszkowania halogenkami metali alkalicznych na właściwości warstw perowskitowych w ogniwach słonecznych
    The impact of alkali metal halide doping on the properties of perovskite layers in solar cells
    Autorzy:
    Szwanda, Agata
    Starowicz, Zbigniew
    Janicki, Jarosław
    Fryczkowski, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/24964490.pdf
    Data publikacji:
    2023-12
    Wydawca:
    Uniwersytet Bielsko-Bialski
    Tematy:
    perowskity
    ogniwa słoneczne
    halogenki metali
    domieszkowanie
    perovskite
    solar cells
    metal halides
    doping
    Opis:
    Perovskite cells are a new generation of solar cells that have gained significant attention in the field of photovoltaics due to their unique properties and potential benefits. Perovskites are a class of materials that have a characteristic crystal structure known as the perovskite structure. The typical chemical formula of perovskite is ABX3, where 'A' and 'B' are cations that differ in size, and 'X' is an anion, most often halogen. Doping with alkali metals in perovskite materials has shown a significant improvement in the efficiency of the solar cell, which is confirmed by numerous scientific studies. The addition of rubidium bromide and other alkali metals, such as lithium, sodium and potassium, affects the microstructure, electronic and optical properties of perovskites, which is crucial for the efficiency and stability of solar cells. The paper presents research results on doping with alkali metals for inorganic perovskite cells based on CsPbBr3. The process of doping with alkali metals was carried out in various stages of creating a Perovskite cell. The work presents the influence of the dopant on the structure of the perovskite and the obtained cell, as well as its optical and electrical properties. The conducted research indicates a positive effect of the addition of rubidium bromide, both in the phase of creating the lead bromide layer and during the application of cesium bromide. The most promising is the admixture of 9% rubidium bromide in the cesium bromide layer. In this way, the applied dopant is located in the perovskite structure, changing its optical and electrical properties.
    Źródło:
    Polish Journal of Materials and Environmental Engineering; 2023, 6(26); 66-78
    2720-1252
    Pojawia się w:
    Polish Journal of Materials and Environmental Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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