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Wyszukujesz frazę "fractal structure" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Delivery-flow routing and scheduling subject to constraints imposed by vehicle flows in fractal-like networks
Autorzy:
Bocewicz, G.
Banaszak, Z.
Nielsen, I.
Powiązania:
https://bibliotekanauki.pl/articles/229533.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transport network
fractal structure
declarative modeling
multimodal processes
delivery flow
vehicles flow
Opis:
The problems of designing supply networks and traffic flow routing and scheduling are the subject of intensive research. The problems encompass the management of the supply of a variety of goods using multi-modal transportation. This research also takes into account the various constraints related to route topology, the parameters of the available fleet of vehicles, order values, delivery due dates, etc. Assuming that the structure of a supply network, constrained by a transport network topology that determines its behavior, we develop a declarative model which would enable the analysis of the relationships between the structure of a supply network and its potential behavior resulting in a set of desired delivery-flows. The problem in question can be reduced to determining sufficient conditions that ensure smooth flow in a transport network with a fractal structure. The proposed approach, which assumes a recursive, fractal network structure, enables the assessment of alternative delivery routes and associated schedules in polynomial time. An illustrative example showing the quantitative and qualitative relationships between the morphological characteristics of the investigated supply networks and the functional parameters of the assumed delivery-flows is provided.
Źródło:
Archives of Control Sciences; 2017, 27, 2; 135-150
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compact coplanar-fed tree-shaped antenna
Autorzy:
Malinowska, Małgorzata
Kitliński, Marek
Powiązania:
https://bibliotekanauki.pl/articles/226372.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
broadband antenna
fractal antenna
reflection coefficient,
defected ground structure
coplanar waveguide
Opis:
The paper presents the concept of a fully planar tree-shaped antenna with quasi-fractal geometry. The shape of the proposed radiator is based on a multi-resonant structure. Developed planar tree has symmetrical branches with different length and is fed by a coplanar waveguide (CPW) with modified edge of the ground plane. The antenna of size 29 mm x25 mm has been designed on Taconic - RF-35 substrate (er = 3.5, tgde= 0.0018, h = 0.762 mm). The paper shows simulated and measured characteristics of return loss, as well as measured radiation patterns. The proposed antenna could be a good candidate for broadband applications (for instance: wideband imaging for medical application and weather monitoring radars in satellite communication etc.)
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 2; 175-180
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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