Kinematic and dynamic characteristics' analysis of a scissor multi-rod ring deployable mechanism [PDF]
Mechanical Sciences, 2023 In this paper, the authors developed a double-layer ring truss deployable antenna mechanism (RTDAM) based on a scissor unit, which can be used as the deployment and support mechanism in large-aperture satellite antenna. Firstly, three configuration state
B. Han +9 more
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Analysis and Design of a Metamaterial Lens Antenna Using the Theory of Characteristic Modes
International Journal of Antennas and Propagation, 2018 A new single-layer metamaterial lens antenna aimed to operate at 10 GHz is proposed in this paper. The lens antenna consists of twelve capacitively coupled unit cells distributed along a ring and illuminated by an open-ended circular waveguide with a ...
Daniel Santillán-Haro +3 more
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Effects of inter-resonator coupling in split ring resonator loaded metamaterial transmission lines [PDF]
, 2014 This paper investigates the effects of inter-resonator coupling in metamaterial transmission lines loaded with split ring resonators (SRRs). The study is performed from Bloch mode theory applied to the multiport equivalent circuit model of the unit cell ...
Fernández-Prieto, Armando +4 more
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Construction of Complex Lattice Codes via Cyclotomic Fields
Trends in Computational and Applied Mathematics, 2022 Through algebraic number theory and Construction $A$ we extend an algebraic procedure which generates complex lattice codes from the polynomial ring \mathbb{F}_{2}[x]/(x^{n}-1), where \mathbb{F}_{2}=\{0,1\}, by using ideals from the generalized ...
E. D. Carvalho +3 more
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ACS Omega, 2021 Using the first-principles theory, this paper studies the Rh-doping behavior on the ZnO monolayer and investigates the adsorption and sensing behaviors of a Rh-doped ZnO (Rh–ZnO) monolayer to NO2 and O3 to explore its potential as a gas sensor to ...
Yan Wang, Xin Yang, Cong Hu, Tian Wu
semanticscholar +1 more source
Vertex and region colorings of planar idempotent divisor graphs of commutative rings.
Iraqi Journal for Computer Science and Mathematics, 2022 The idempotent divisor graph of a commutative ring R is a graph with vertices set in R* = R-{0}, and any distinct vertices x and y are adjacent if and only if x.y = e, for some non-unit idempotent element e2 = e ? R, and is denoted by ?(R).
Mohammed Authman +2 more
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Gap-Size-Dependent Effective Phase Transition in Metasurfaces of Closed-Ring Resonators
Crystals, 2021 We theoretically investigate a metal-to-insulator transition in artificial two-dimensional (2D) crystals (i.e., metasurfaces) of tightly coupled closed-ring resonators.
Seojoo Lee, Ji-Hun Kang
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Quasi-Regular Graphs Associated with Commutative Rings
Journal of Mathematics, 2022 One of the most important branches of mathematics is algebraic graph theory, which solves graph problems with algebraic methods. In graph theory, several algebraic properties of a ring can be represented.
Nasr Zeyada +2 more
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Stabilizing a metalloid {Zn12} unit within a polymetallide environment in [K2Zn20Bi16]6−
Nature Communications, 2020 The access to molecules comprising direct Zn–Zn bonds has become very topical in recent years for various reasons. Low-valent organozinc compounds show remarkable reactivities, and larger Zn–Zn-bonded gas-phase species exhibit a very unusual coexistence ...
Armin R Eulenstein +5 more
semanticscholar +1 more source
Epimerization of trans-Cycloalkenes with the X–C=C–SeR*-Unit – The Steric Demand of X = H, F, Cl, Br, I, Me, Et and CF3 [PDF]
, 2023 Trans-cycloalkenes with the X–C=C–SeR*-unit and ring sizes from 9 to 20 have been synthesized. Bond the selenium atom is the chiral (S)-o-(1-Methoxypropyl)phenyl-residue R*, and X = H, F, Cl, Br, I, Me, Et and CF3. The planar-chiral trans-cycloalkenes in
Achazi, Andreas J. +2 more
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