Results 21 to 30 of about 64,724 (310)
Orthogonal polynomials for exponential weights x2α(1 – x2)2ρe–2Q(x) on [0, 1)
Open Mathematics, 2020 Let Wα,ρ = xα(1 – x2)ρe–Q(x), where α > –12$\begin{array}{} \displaystyle \frac12 \end{array}$ and Q is continuous and increasing on [0, 1), with limit ∞ at 1.
Liu Rong
doaj +1 more source
UCA-Based OAM Non-Orthogonal Multi-Mode Multiplexing
IEEE Open Journal of Antennas and Propagation, 2021 Electromagnetic waves carrying orbital angular momentum (OAM) can improve the spectral efficiency of communication systems by multiplexing a number of OAM modes.
Rui Chen +4 more
doaj +1 more source
Alexandria Engineering Journal, 2023 This paper presents an innovative technique to synthesize a virtual antenna array (VAA) that consumes less energy than conventional antenna arrays that are used in mobile communications systems.
Mohammad Alibakhshikenari +8 more
doaj +1 more source
Hilbert Bases for Orthogonal Arrays [PDF]
Journal of Statistical Theory and Practice, 2007 In this paper, we relate the problem of generating all 2-level orthogonal arrays of given dimension and force, i.e. elements in OA$(n,m)$, where $n$ is the number of factors and $m$ the force, to the solution of an Integer Programming problem involving rational convex cones. We do not restrict the number of points in the array, i.e. we admit any number
CARLINI, ENRICO, PISTONE, Giovanni
openaire +3 more sources
Robust approaches to remote calibration of a transmitting array [PDF]
, 2010 We consider the problem of estimating the gains and phases of the RF channels of a M-element transmitting array, based on a calibration procedure where M orthogonal signals are sent through M orthogonal beams and received on a single antenna.
Bidon, Stéphanie +2 more
core +1 more source
The Annals of Mathematical Statistics, 1966 It was shown in [11] that one can construct orthogonal arrays $(\lambda 2^3, k + 1, 2, 3)$ from arrays $(\lambda 2^2, k, 2, 2)$ with the maximum number of constraints $k + 1$ provided that $k$ is the maximum number of constraints for the arrays of strength two. This result is generalized here to construction of arrays $(\lambda 2^{t + 1}, k + 1, 2, t +
Seiden, Esther, Zemach, Rita
openaire +2 more sources
METODE TAGUCHI UNTUK OPTIMALISASI PRODUK PADA RANCANGAN FAKTORIAL
Media Statistika, 2009 Taguchi methods represent the effort quality improvement which known as off-line quality control method because the method design quality into every appropriate process and product. Taguchi methods is represent quality repair with attempt “new” methods,
Triastuti Wuryandari +2 more
doaj +1 more source
Millimeter-wave multi-mode circular antenna array for uni-cast multi-cast and OAM communication
Scientific Reports, 2021 This paper investigates uni-/multi-cast and orbital angular momentum (OAM) mode data transmission in orthogonal directions by the utilization of a new circular antenna array, operating at 28 GHz.
Stylianos D. Assimonis +2 more
doaj +1 more source
Orthogonal methods based ant colony search for solving continuous optimization problems [PDF]
, 2008 Research into ant colony algorithms for solving continuous optimization problems forms one of the most significant and promising areas in swarm computation.
Jun Zhang +5 more
core +1 more source