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    PHYSICAL FIELDS OF CIRCULAR CYLINDRICAL PIEZOCERAMIC RECEIVER IN PRESENCE OF A FLAT ACOUSTIC SOFT SCREEN by A. V. Derepa, A. G. Leiko, O. N. Pozdniakova

    Published 2017-06-01
    “…The design model of the «transducer–creen» system was formulated taking into account the interaction of acoustic, mechanical and electric fields in the process of energy conversion, the interaction of a cylindrical transducer with a flat screen and the interaction of a converter with elastic media outside and inside it. The physical fields of the system under consideration were determined by following solutions: the wave equation; equations of motion of thin piezoceramic cylindrical shells in displacements; equations of stimulated electrostatics for piezoceramics for given boundary conditions, conditions for coupling fields at interfaces and electrical conditions.A general conclusion was made concerning solving of an infinite system of linear algebraic equations with respect to the unknown coefficients of the expansion of the fields. …”
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    Copper Adsorption Using Hydroxyapatite Derived from Bovine Bone by Lingchang Kong, Xin Liu, Guocheng Lv, Tianming Liu, Peijun Zhang, Yuxin Li, Bin Chen, Libing Liao

    Published 2022-01-01
    “…Low cost, seepage stability, and great longevity are considered within PRB reactive media. In this paper, hydroxyapatite derived from bovine bone was proven to be a suitable adsorbent owing to cost-effectiveness, great adsorption capacity, and longevity. …”
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    Effect of quenching medium, solution treatment, and aging parameters on mechanical properties of Aluminum alloy 6061 by Pshtiwan Karim, Rekawt Amin, Hawre Amin, Abbas Khwakaram, Omer Mahmood

    Published 2025-01-01
    “…To select an optimal quenching medium from three distinct quenching media (corn, sunflower, and sesame oil), solution heat treatment was conducted on three impact test samples at 545 ℃ for 2 hours, and then quenching was conducted in the mentioned quenching medium. …”
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