Results 21 to 30 of about 2,251,211 (322)
Active Reconfigurable Intelligent Surface-Aided Wireless Communications [PDF]
IEEE Transactions on Wireless Communications, 2021 Reconfigurable Intelligent Surface (RIS) is a promising solution to reconfigure the wireless environment in a controllable way. To compensate for the double-fading attenuation in the RIS-aided link, a large number of passive reflecting elements (REs) are
Ruizhe Long +3 more
semanticscholar +1 more source
HARDENING BY HARD CHROMING (ELECTROLYTIC) [PDF]
Fiabilitate şi Durabilitate, 2023 The deposition of a layer of chrome on the surface of a part, through hard (electrolytic) chrome plating, is applied in order to increase the hardness and wear resistance of the surface layer of the working surfaces of the active elements of the punch.
STĂNCIOIU A, STĂNCIOIU E.L.
doaj
On modification of eutectic cast iron graphite
Литьë и металлургия, 2023 It has been shown that elementary crystalline cells of graphite and basic products of iron modification do not correspond to the principle of structural and dimensional correspondence of Dankov –Konobeevsky. Modifying elements Al, Ca, Mg, Ba, Ce increase
E. I. Marukovich +2 more
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ISAC system assisted by RIS with sparse active elements
EURASIP Journal on Advances in Signal Processing, 2023 In this paper, we consider an integrated sensing and communications system assisted by a reconfigurable intelligent surface (RIS). A small number of sparsely placed active sensors are applied in the RIS to perform effective channels and, thereby, enable ...
Mirza Asif Haider +2 more
semanticscholar +1 more source
Active-Passive IRS Aided Wireless Communication: New Hybrid Architecture and Elements Allocation Optimization [PDF]
IEEE Transactions on Wireless Communications, 2022 Intelligent reflecting surface (IRS) has emerged as a promising technology to enhance the wireless communication network coverage and capacity by dynamically controlling the radio signal propagation environment.
Zhenyu Kang, Changsheng You, Rui Zhang
semanticscholar +1 more source
Use of nanostructured and modified TiO2 as a gas sensing agent
Cerâmica, 2021 Titanium dioxide (TiO2) has attracted interest for sensory applications due to its high surface area and the high density of active adsorption sites. This review shows the effect of the nanostructure, synthesis technique, operating temperature, target ...
R. Alves Junior +5 more
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On the stability of aluminum oxide in carbon steel melts
Литьë и металлургия, 2023 It is shown that hydrogen atoms in carbon steel melts are surface‑active elements for aluminum oxide microcrystals. Adsorbed hydrogen atoms reduce the interfacial surface energy and increase the resistance of small aluminum oxide microcrystals to ...
E. I. Marukovich +2 more
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NANOSTRUCTURIZATION IN FOUNDRY PROCESSES
Литьë и металлургия, 2018 It is shown that at crystallization of alloys the sophisticated nanostructural processes have place. The nanocrystals of phases, their atoms, the centers of crystallization of dendrites, surface-active elements, gases, modifying elements, poorly soluble ...
E. I. Marukovich, V. Yu. Stetsenko
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Full Gradient Stabilized Cut Finite Element Methods for Surface Partial Differential Equations [PDF]
, 2016 We propose and analyze a new stabilized cut finite element method for the Laplace-Beltrami operator on a closed surface. The new stabilization term provides control of the full $\mathbb{R}^3$ gradient on the active mesh consisting of the elements that ...
Burman, Erik +4 more
core +2 more sources
Solutions of the scientific problem of modifying of foundry alloys
Литьë и металлургия, 2019 For a solution of the problem of modification of a microstructure of cast alloys it is necessary to accept admission that crystallization centers of crystals of phases are the crystalline buildups consisting of nanocrystals of phases.
E. I. Marukovich, V. Yu. Stetsenko
doaj +1 more source