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    Wyświetlanie 1-4 z 4
    Tytuł:
    Diffusion Path in Ternary One-Phase Systems: An Overview
    Autorzy:
    Serafin, D.
    Nowak, W. J.
    Wierzba, P.
    Wędrychowicz, S.
    Wierzba, Bartek
    Powiązania:
    https://bibliotekanauki.pl/articles/175705.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inter-diffusion
    up-hill diffusion
    diffusion path
    Opis:
    In this article, the fundamental questions concerning the diffusion path, in particular, what is the shape of diffusion path in ternary systems and how to approximate it from the initial concentration profile, will be answered. The new rules were found which allow for determining the diffusion path from a known initial concentration of the components. This approximation will allow for designing new materials without a time-consuming numerical simulation of the full system of equations. It is shown that the difference in intrinsic diffusion coefficients determines the up-hill diffusion.
    Źródło:
    Advances in Manufacturing Science and Technology; 2020, 44, 1; 1-8
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat path characterization of high-k HfO2-Ta2O5 capacitor in Verilog-A
    Autorzy:
    Masana, F. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/398138.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    opór cieplny
    ścieżka cieplna
    dyfuzja
    droga dyfuzji
    efuzyjność
    thermal impedance
    heat path
    diffusion
    diffusion length
    effusivity
    Opis:
    Thermal impedance measurement of semiconductor devices is one of the standard and well established methods of characterization. From such measurements can be obtained not only behavioral information in the form of graphs or models for thermal simulation, but also structural information about the thermal path involved, from source to sink, that can be very useful in device assembly process characterization and control. Structural information, however, usually requires many processing steps of measured data with its associated calculation burden and numerical errors. This work proposes a method to extract structural information from measured data in a straightforward way, with very few and elementary calculations, thus providing a useful analysis tool.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2011, 2, 3; 100-104
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Path planning for an autonomous underwater vehicle in a cluttered underwater environment based on the heat method
    Autorzy:
    Sun, Kaiyue
    Liu, Xiangyang
    Powiązania:
    https://bibliotekanauki.pl/articles/1838202.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    autonomous underwater vehicle
    path planning
    heat method
    heat diffusion
    cost function
    autonomiczny pojazd podwodny
    planowanie trasy
    dyfuzja ciepła
    funkcja kosztu
    Opis:
    This paper proposes a novel autonomous underwater vehicle path planning algorithm in a cluttered underwater environment based on the heat method. The algorithm calculates the isotropic and anisotropic geodesic distances by adding the direction and magnitude of the currents to the heat method, which is named the anisotropy-based heat method. Taking account of the relevant influence of the environment on the cost functions, such as currents, obstacles and turn of the vehicle, an efficient collision-free and energy-optimized path solution can be obtained. Simulation results show that the anisotropy-based heat method is able to find a good trajectory in both static and dynamic clutter fields (including uncertain obstacles and changing currents). Compared with the fast marching (FM) algorithm, the anisotropy-based heat method is not only robust, flexible, and simple to implement, but it also greatly saves time consumption and memory footprint in a time-variant environment. Finally, the evaluation criteria of paths are proposed in terms of length, arrival time, energy consumption, and smoothness.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 289-301
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Path planning for an autonomous underwater vehicle in a cluttered underwater environment based on the heat method
    Autorzy:
    Sun, Kaiyue
    Liu, Xiangyang
    Powiązania:
    https://bibliotekanauki.pl/articles/1838198.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    autonomous underwater vehicle
    path planning
    heat method
    heat diffusion
    cost function
    pojazd podwodny autonomiczny
    planowanie trasy
    dyfuzja ciepła
    funkcja kosztu
    Opis:
    This paper proposes a novel autonomous underwater vehicle path planning algorithm in a cluttered underwater environment based on the heat method. The algorithm calculates the isotropic and anisotropic geodesic distances by adding the direction and magnitude of the currents to the heat method, which is named the anisotropy-based heat method. Taking account of the relevant influence of the environment on the cost functions, such as currents, obstacles and turn of the vehicle, an efficient collision-free and energy-optimized path solution can be obtained. Simulation results show that the anisotropy-based heat method is able to find a good trajectory in both static and dynamic clutter fields (including uncertain obstacles and changing currents). Compared with the fast marching (FM) algorithm, the anisotropy-based heat method is not only robust, flexible, and simple to implement, but it also greatly saves time consumption and memory footprint in a time-variant environment. Finally, the evaluation criteria of paths are proposed in terms of length, arrival time, energy consumption, and smoothness.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 289-301
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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