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    Wyświetlanie 1-6 z 6
    Tytuł:
    Experiment and prediction of water content of sour natural gas with an modified cubic plus association equation of state
    Autorzy:
    Liu, Y.
    Zhu, Y.
    Zhu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/779356.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    water content
    sour natural gas
    CPA-EoS
    binary interaction parameter
    PR
    Opis:
    In this work, new experimental value for water content in sour natural gas were reported. In addition, to predict the water content in sour natural gas, a modified cubic plus association equation of state (CPA-EoS) was also proposed. In this model, a new energy parameter a was proposed to make an accurate description of saturated liquid density. Additionally, a temperature dependent binary interaction parameter kij for six binary systems was also obtained. Lastly, a comparison between the prediction results of the modified CPA-EoS and the experimental data was presented, and the results showed that the modifi ed CPA-EoS could predict the water content in sour natural gas with high accuracy, which has an AAD of 3.6722% with experimental data in literatures and an AAD of 1.946% for experimental data reported in this work.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 2; 98-106
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new simulation-optimization approach for the circulation facilities design at urban rail transit station
    Autorzy:
    Khattak, A.
    Jiang, Y.
    Zhu, J.
    Hu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/223467.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    urban rail transit station
    facilities design
    genetic algorithm
    simulation optimisation
    stacja transportu miejskiego
    projektowanie obiektów
    algorytm genetyczny
    symulacja optymalizacji
    Opis:
    Width design of the urban rail transit stations circulation facilities is a vital issue. The existing width design approach failed in fully considering the essential factors such as fluctuation in passengers’ arrival process, fluctuation and state-dependence in passengers walking speed and the blocking when passengers’ demand exceeds the capacity of facilities. For this purpose, a PH-based simulation-optimization approach is proposed that fully considers the fluctuation, the state-dependence, Level of Service (LOS) and blocking effect. This novel approach provides automatic reconfiguration of the widths of circulation facilities by a concurrent implementation of a PH-based Discrete-Event Simulation (DES) model and the Genetic Algorithm (GA). The proposed PH-based simulation-optimization approach and the existing design approaches based on the exponential and deterministic models are applied to design the widths of circulation facilities. The results reveal that the circulation facilities designed by the proposed approach have larger widths. Similarly, increase in the SCV of arrival interval results in increasing the widths designed by the proposed approach increase while the widths of the other two approaches stay the same. The width designed of the proposed approach increase at faster rate than that of the other two approach when the passengers’ arrival rate increases.
    Źródło:
    Archives of Transport; 2017, 43, 3; 69-90
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous removal of NH4+ and PO43- from simulated reclaimed waters by modified natural zeolite. Preparation, characterization and thermodynamics
    Autorzy:
    Alshameri, A.
    He, H.
    Dawood, A. S.
    Zhu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/207387.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Langmuir isotherm
    struvite crystallization
    nitrogen
    izoterma Langmuira
    krystalizacja struwitu
    azot
    Opis:
    Natural zeolite was modified by NaCl, AlCl3 and thermal treatment for the removal of NH4+ and PO43− ions. The characteristics of the modified zeolite (AlZ) and its mechanism for the NH4 + and PO43− removal were studied and compared. The results showed that the surface area and the Na+ and Al3+ content increased whereas the content of Ca2+, K+ and Mg2+ decreased after zeolite modification. On natural zeolite when activated with the 1 M NaCl and 10 cm3 /g of pillaring dosage, high adsorption efficiencies for the NH4 + (97.80%) PO43− (98.60%) were obtained. The results of various analyses indicated that the Na+ exchange is the main mechanism for NH4 + removal whereas the adsorption mechanism for PO43− followed the complexation with Al–OH groups present in the AlZ. In addition, the kinetics study showed that the adsorption of NH4+ and PO43− followed pseudo-second order model while the adsorption isotherm of NH4 + and PO43− is consistent with the Langmuir isotherm model. Moreover, the Gibbs free energy change for the simultaneous removal of the ions indicates that NH4 + is adsorbed faster compared to PO43−. The simultaneous removal of NH4 + and PO43− by AlZ adsorbent is cost effective in water treatment at low ion concentrations.
    Źródło:
    Environment Protection Engineering; 2017, 43, 4; 73-92
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic and Thermodynamic Properties of Anti-Perovskite Type Superconductor $MCNi_3$ (M = Zn, Cd)
    Autorzy:
    Duan, M.
    Tan, J.
    Ji, G.
    Chen, X.
    Zhu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535766.pdf
    Data publikacji:
    2010-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    62.20.D-
    91.60.Gf
    Opis:
    The elastic and thermodynamic properties of the anti-perovskite superconductor $ZnCNi_3$ and $CdCNi_3$ are investigated by first-principles calculations. With the local density approximation as well as the generalized gradient approximation for exchange and correlation, the ground state properties and equation of state are obtained, which agree well with other theoretical calculations and experiments. Furthermore, by the elastic stability criteria, we predict that $ZnCNi_3$ and $CdCNi_3$ are not stable above 98.1 GPa and 196.5 GPa, respectively. The dependences of the heat capacity, thermal expansion coefficient, the Grüneisen parameter and bulk modulus ($B_{T}$ and $B_{S}$) on pressure and temperature for $ZnCNi_3$ and $CdCNi_3$ are also obtained successfully.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 4; 652-658
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An ant-based filtering random-finite-set approach to simultaneous localization and mapping
    Autorzy:
    Li, D.
    Zhu, J.
    Xu, B.
    Lu, M.
    Li, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/329854.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    simultaneous localization
    simultaneous mapping
    random finite set
    probability hypothesis density
    ant colony
    lokalizacja jednoczesna
    mapowanie jednoczesne
    algorytm mrówkowy
    Opis:
    Inspired by ant foraging, as well as modeling of the feature map and measurements as random finite sets, a novel formulation in an ant colony framework is proposed to jointly estimate the map and the vehicle trajectory so as to solve a feature-based simultaneous localization and mapping (SLAM) problem. This so-called ant-PHD-SLAM algorithm allows decomposing the recursion for the joint map-trajectory posterior density into a jointly propagated posterior density of the vehicle trajectory and the posterior density of the feature map conditioned on the vehicle trajectory. More specifically, an ant-PHD filter is proposed to jointly estimate the number of map features and their locations, namely, using the powerful search ability and collective cooperation of ants to complete the PHD-SLAM filter time prediction and data update process. Meanwhile, a novel fast moving ant estimator (F-MAE) is utilized to estimate the maneuvering vehicle trajectory. Evaluation and comparison using several numerical examples show a performance improvement over recently reported approaches. Moreover, the experimental results based on the robot operation system (ROS) platform validate the consistency with the results obtained from numerical simulations.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 3; 505-519
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation of micro-encapsulated strawberry fragrance and its application in the aromatic wallpaper
    Autorzy:
    Xiao, Z.
    Zhang, Y.
    Zhu, G.
    Niu, Y.
    Xue, Z.
    Zhu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/778533.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    micro-encapsulation
    fragrance
    wallpaper
    controlled release
    Opis:
    Micro-encapsulated strawberry fragrance was successfully prepared with wall materials including maltodextrin, sodium octenylsuccinate and gum Arabic. The micro-capsule was added to wallpaper and aromatic wallpaper with strawberry characteristics was obtained. The particle distribution, surface morphology, chemical structure, thermal property and controlled release performance of micro-encapsulated fragrance and aromatic wallpaper were investigated using laser particle size analyzer, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-TR), thermal gravity analysis (TGA) and chromatography-mass spectrometer (GC-MS). The results showed that the average diameter of micro-capsule was 2 μm and the particles mainly distributed in the tissues of wallpaper. The result of TGA showed that the micro-capsule had a good stability. Meanwhile, the aromatic wallpaper had strawberry aroma more than 3 months and took on excellent controlled release performance.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 1; 89-94
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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