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Wyszukujesz frazę "UCS" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Development and Research Power-Supply System Model with TCT UCS
    Autorzy:
    Sosnina, E.
    Bedretdinov, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/115714.pdf
    Data publikacji:
    2013
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    power supply system
    power distribution system
    TCT UCS
    simulation model
    voltage regulation
    Opis:
    Problem of upgrading the power quality for household consumers electricity has been considered. It was recommended to use the noncontact thyristor controlled transformer with unidirectional current switches. We conducted a set of calculating the power supply system parameters. This allowed to perform of power supply system elements model tests and to create electric power distribution system simulation model in the program Matlab (Simulink). We conducted research of received model and completed the analysis of modeling results.
    Źródło:
    Challenges of Modern Technology; 2013, 4, 3; 41-47
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Artificial intelligence-based modeling for the estimation of Q-Factor and elastic young’s modulus of sandstones deteriorated by a wetting-drying cyclic process
    Autorzy:
    Rashid, Hafiz Muhammad Awais
    Ghazzali, Muhammad
    Waqas, Umer
    Malik, Adnan Anwar
    Abubakar, Muhammad Zubair
    Powiązania:
    https://bibliotekanauki.pl/articles/2073878.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    przepuszczalność skał
    współczynnik Q
    piaskowiec
    wetting and drying cycles
    rock permeability
    dynamic elastic Young’s modulus
    Q-factor
    UCS
    Opis:
    In this study, a series of destructive and non-destructive tests were performed on sandstone samples subjected to wetting-drying cycles. A total of 25 Wet-Dry cycles were provided to investigate any significant change in the engineering properties of sandstones in terms of their porosity, permeability, water absorption, density, Q-factor, elastic modulus (E), and unconfined compressive strength (UCS). The overall reduction in the values of density, E, Q-factor, and UCS was noted as 3-4%, 42-71%, 34-62%, and 26-70% respectively. Whereas, the overall appreciation in the values of porosity, permeability, and water absorption was recorded as 24-50%, 31-64%, and 25-50% respectively. The bivariate analysis showed that the physical parameters had a strong relationship with one another and their Pearson’s correlation value (R) ranged from 0.87-0.99. In prediction modeling, Q-factor and E were regressed with the contemplated physical properties. The linear regression models did not provide satisfactory results due to their multicollinearity problem. Their VIF (variance inflation factor) value was found much greater than the threshold limit of 10. To overcome this problem, the cascade-forward neural network technique was used to develop significant prediction models. In the case of a neural network modeling, the goodness of fit between estimated and predicted values of the Q-factor (R2 = 0.86) and E (R2 = 0.91) was found much better than those calculated for the Q-factor (R2 = 0.30) and E (R2 = 0.36) in the regression analysis.
    Źródło:
    Archives of Mining Sciences; 2021, 66, 4; 635--658
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Waste Glass Powder on Subgrade Soil Improvement
    Autorzy:
    Javed, Syed Aaqib
    Chakraborty, Sudipta
    Powiązania:
    https://bibliotekanauki.pl/articles/1030256.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    California Bearing Ratio (CBR)
    Liquid Limit (LL)
    Maximum Dry Density (MDD)
    Optimum Moisture Content (OMC)
    Plastic Limit (PL)
    Soil Stabilization
    Unconfined Compression Strength (UCS)
    Waste Glass Powder
    Opis:
    The weak soil is largely distributed worldwide and creates problems in constructing pavements, roadways, structures, irrigation systems and foundation works due to low shear strength and bearing capacity. The ways of improving soil is known as soil stabilization. Various soil stabilization techniques are using but none of them are cost effective and environmentally friendly way. The present study aims to effect of soil stabilization with waste glass powder which will reduce the cost and is environmentally friendly. To investigate the effect of glass powder in cohesive soil different types of index and geotechnical engineering tests are conducted and compared with the virgin soil. Glass powder was mixed with the soil samples by 2%, 4%, 6%, 8% and 10% of dry weight of soil to conduct the tests and to determine the optimum percentage of glass powder. The Liquid Limit (LL), Plastic Limit (PL) and Plasticity Index (PI) continuously decreased and found 33.9%, 18.4% and 15.5% respectively at 10% of glass powder. Maximum dry density (MDD) was increasing and found constant and Optimum Moisture Content (OMC) was decreasing when added glass powder. The both Unsoaked and Soaked California Bearing Ratio (CBR) was increasing with the addition of glass powder and found maximum value 22.5% and 10.4% respectively. Unconfined compressive strength (UCS) was increasing up to 8% of glass powder and found to 133.5 KN/m2 and then decreased to 119.7 KN/m2 when added 10% of glass powder. Shear strength parameter also increases with the increase of glass powder. The study found that the optimum percentage of glass powder is 8% of dry weight of soil.
    Źródło:
    World Scientific News; 2020, 144; 30-42
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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