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    Wyświetlanie 1-5 z 5
    Tytuł:
    A pore scale study on fluid flow through two dimensional dual scale porous media with small number of intraparticle pores
    Autorzy:
    Sabet, S.
    Mobedi, M.
    Ozgumus, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/778637.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    pore level numerical analysis
    dual scale porous media
    interparticle permeability
    intraparticle
    permeability
    bulk permeability
    Opis:
    In the present study, the fluid flow in a periodic, non-isotropic dual scale porous media consisting of permeable square rods in inline arrangement is analyzed to determine permeability, numerically. The continuity and Navier-Stokes equations are solved to obtain the velocity and pressure distributions in the unit structures of the dual scale porous media for flows within Darcy region. Based on the obtained results, the intrinsic inter and intraparticle permeabilities and the bulk permeability tensor of the dual scale porous media are obtained for different values of inter and intraparticle porosities. The study is performed for interparticle porosities between 0.4 and 0.75 and for intraparticle porosities from 0.2 to 0.8. A correlation based on Kozeny-Carman relationship in terms of inter and intraparticle porosities and permeabilities is proposed to determine the bulk permeability tensor of the dual scale porous media.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 1; 80-92
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic behavior of buried pipelines subjected to reverse fault moti
    Autorzy:
    Sabet, S. A.
    Nayyeri, S. M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/103033.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    finite element method
    reverse fault
    normal fault
    buried pipeline
    Opis:
    Network of buried pipelines is one of the critical elements in infrastructure of today's modern cities that cover large geographic distances. That is why they face a variety of natural hazards due to permanent ground replacements or wave emissions. Reports suggest that the main cause of damage to these lines is not seismic vibrations but large and permanent ground deformations are major causes of infrastructures' demolition. Most recent studies are related to lines crossing the strike-slip faults, and only a few researchers have tried to study the behavior of structures against the reverse fault. This article discusses the behavior and response of structures and infrastructures against the movements of reverse faults using the finite elements method. In this study, the interaction between soil-soil and soil-pipe has been considered in modeling terms. By using Abacus finite element analysis software version 6.11, pipe as shell element and the material behavior as elastoplastic as well as the soil around the pipeline as a continuous volumetric elements were designed and analyzed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 30; 84-88
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prediction of littoral drift with adaptive neuro-fuzzy inference system
    Ocena dryfu morskiego z wykorzystaniem systemu ANFIS [Adaptive Neuro-Fuzzy Inference System]
    Autorzy:
    Sabet, M S
    Naseri, M.A.
    Sabet, H.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/81613.pdf
    Data publikacji:
    2010
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    littoral sand drift
    coastal zone
    adaptive neuro-fuzzy inference system
    validation
    physical process
    database
    Opis:
    The amount of sand moving parallel to a coastline forms a prerequisite for many harbor design projects. Such information is currently obtained through various empirical formulae. Despite so many works in the past, an accurate and reliable estimation of the rate of sand drift has still remained a problem. It is a non-linear process and can be described by chaotic time-series. The current study addresses this issue through the use of Adaptive Neuro-Fuzzy Inference System (ANFIS). ANFIS is about taking an initial fuzzy inference system (FIS) and tuning it with a back propagation algorithm based on the collection of input-output data. ANFIS was developed to predict the sand drift from a variety of causative variables. The structure and algorithm of ANFIS for predicting the rate of sand drift is described. The Adaptive Neuro-Fuzzy Inference System was validated by confi rming its consistency with a database of specifi ed physical process.
    W artykule przedstawiono adaptację systemu ANFIS do oceny wielkości dryfu fal piaskowych poruszających się wzdłuż wybrzeża morskiego. Pomimo wielu informacji o charakterze ilościowym oraz jakościowym zebranych w badaniach terenowych oraz opracowanych wzorów empirycznych opisujących analizowane zjawisko, autorzy widzą potrzebę stosowania symulacji zjawiska za pomocą metod numerycznych. Takie możliwości daje omówiony w pracy system ANFIS.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 159-167
    0208-5771
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An experimental study on drying characteristics and kinetics of figs (Ficus carica)
    Autorzy:
    Sarvestani, F. Sabet
    Rahimi, A.
    Hatamipour, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/779372.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    drying kinetics
    figs
    effective diffusivity
    equilibrium moisture content
    drying
    Opis:
    In this study, the thin-layer drying characteristics of Figs (Ficus carica) are investigated in a pilot scale forced convective dryer. Experiments carried out under various operating conditions including air temperature (40, 50, 60, 70°C), air velocity (0.65, 2.1, 3.45, 4.85 m/s) and air humidity (0.005, 0.010, 0.015 kg/kg) and the effects of these operating conditions on the drying kinetics and the drying time determined. The obtained kinetics data are fitted into a conceptually developed model. The equilibrium moisture content of the dried figs is determined at different values of temperature and relative humidity of air. The values of effective moisture diffusivity (Deff) are obtained from the Fick’s second law and a temperature-dependent relation is proposed for this parameter.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 4; 60-65
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production, quality control and initial imaging studies of [82mRb]RbCl for PET studies
    Autorzy:
    Rowshanfarzad, P.
    Jalilian, A.
    Kiyomarsi, M.
    Sabet, M.
    Karimian, A.
    Moradkhani, S.
    Mirzaii, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146165.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    rubidium-82m
    quality control
    animal study
    cyclotron
    Opis:
    Rubidium-82m was prepared via 15.4 MeV proton irradiation of a krypton-82 gaseous target (30% enrichment). Washing the target chamber with hot water yielded a Rb-82m containing solution, which was further purified using short column chromatography in order to remove organic/inorganic impurities. The flowthrough was formulated in normal saline for injection. Radionuclide, radiochemical and chemical purity tests were performed prior to administration to rats for imaging (radiochemical yield: 95-97%, radiochemical purity > 97%). Preliminary dual-head coincidence studies were performed to determine the distribution of [82mRb]Rb in normal rats. For biodistribution studies, Rb-81 was injected to rats and tracer accumulation in heart, GI and bladder was determined after sacrification in time intervals. A yield of 1.3 GBq at EOB, 235.7 MBq/mAh was obtained.
    Źródło:
    Nukleonika; 2006, 51, 4; 209-215
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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