يعرض 681 - 700 نتائج من 969 نتيجة بحث عن '(( 50 ((nn decrease) OR (a decrease)) ) OR ((( 1 11 decrease ) OR ( a systematic decrease ))))*', وقت الاستعلام: 0.20s تنقيح النتائج
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    Structural and magnetic properties of Ni1-xZnxFe 2O4 (x=0, 0.5 and 1) nanopowders prepared by sol-gel method حسب Gao P.

    منشور في 2013
    "…A series of nanostructured Ni-Zn ferrites Ni1-xZn xFe2O4 (x=0, 0.5 and 1) with a grain size from 24 to 65 nm have been prepared with a sol-gel method. …"
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    Synthesis of silica supported ni and cu catalyst for carbon dioxide methanation reaction حسب Aheed, Ahmed

    منشور في 2019
    "…The activity and product selectivity and stability for methanation reaction on Ni/SiO2 and Cu/SiO2 catalysts have been evaluated using a flow reactor between 50ºC - 650ºC. The as-synthesized catalysts were characterized using XRD, SEM, TEM to understand the structural properties. …"
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    Measurements of laminar flame speeds of alternative gaseous fuel mixtures حسب Ibrahim, Ahmed S.

    منشور في 2015
    "…Measurements of SL of CH4/LPG-air mixtures have found to be about 56cm/s at ø=1.1 with 60% LPG in the mixture, which is higher than SL of both pure fuels at the same ø. …"
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  16. 696

    Simulation and Optimization of an LNG Plant Cold Section حسب Katebah, Mary Anna

    منشور في 2018
    "…Among all the available cycles, the propane pre-cooled mixed refrigerant (C3MR) system is the leading one in the LNG industry. Therefore, this research focuses on decreasing the energy consumption of C3MR and NGL recovery system with helium extraction (producing approximately 60 mol% crude helium) and nitrogen rejection units. …"
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    Fluid-Structure-Acoustic coupling analysis for external laminar and turbulent fluid flows حسب Tohid, Adibi

    منشور في 2023
    "…The results indicate that the transmission loss is 27% more at the elastic plate’s highest position. By decreasing the length of the elastic plate by 50%, the mean transmission loss is reduced by 9%. …"
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