Results 11 to 20 of about 2,251,211 (322)

Capacity Improvement for Intelligent Reflecting Surface-Assisted Wireless Systems With a Small Portion of Active Elements

open access: yesIEEE Access, 2022
In this study, the use of intelligent reflecting surfaces (IRSs) to improve the capacity of a multi-user multiple-input-single-output downlink system is investigated.
Jung-Chieh Chen
doaj   +2 more sources

Measurements of Liquid AISI 304L Steel Density and Surface Tension, and Influence of Surface‐Active Elements at High Temperatures

open access: yessteel research international, 2022
Within the framework of the welding of steel components in pressurized water reactors, the optimization of the weld pool penetration is a major issue. The thermal‐hydraulics of the molten steel pool can be driven by Marangoni flows at the free surface.
Delacroix, Jules   +6 more
openaire   +3 more sources

Effects of surface active elements on weld pool formation using TIG arcs

open access: yesWelding International, 2005
Abstract A-TIG welding is the welding process where powdered activating flux (welding facilitating agent) with oxides such as TiO2 and Cr2O3 as the main constituents is dissolved by volatile solvent, such as methyl ethyl ketone and acetone and is applied using a brush, in advance, on the base metal surface which is then subjected to TIG welding.1 A ...
Manabu Tanaka
openaire   +3 more sources

Channel Estimation for Reconfigurable Intelligent Surface With a Few Active Elements [PDF]

open access: yesIEEE Transactions on Vehicular Technology, 2023
In this paper, a channel estimation technique for reconfigurable intelligent surface (RIS)-aided multi-user multiple-input single-output communication systems is proposed. By deploying a small number of active elements at the RIS, the RIS can receive and
Gyoseung Lee   +4 more
semanticscholar   +1 more source

Wireless Communication Aided by Intelligent Reflecting Surface: Active or Passive? [PDF]

open access: yesIEEE Wireless Communications Letters, 2021
In this letter, we consider an intelligent reflecting surface (IRS)-aided wireless communication system, where an active or passive IRS is employed to assist the communication between an access point and a user.
Changsheng You, Rui Zhang
semanticscholar   +1 more source

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