Results 51 to 60 of about 55,699 (240)
A generalized Walsh system for arbitrary matrices
Demonstratio Mathematica, 2019 In this paper we study in detail a variation of the orthonormal bases (ONB) of L2[0, 1] introduced in [Dutkay D. E., Picioroaga G., Song M. S., Orthonormal bases generated by Cuntz algebras, J. Math. Anal.
Harding Steven N., Picioroaga Gabriel
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Unveil Fundamental Graph Properties for Neural Architecture Search
Advanced Science, EarlyView.This paper proposes NASGraph, a graph‐based framework that represents neural architectures as graphs whose structural properties determine performance. By revealing structure–performance relationships, NASGraph enables efficient neural architecture search with significantly reduced computation.
Zhenhan Huang +4 more
wiley +1 more source
Legendre pairs of lengths ℓ ≡ 0 (mod 5)
Special Matrices, 2023 By assuming a type of balance for length ℓ=87\ell =87 and nontrivial subgroups of multiplier groups of Legendre pairs (LPs) for length ℓ=85\ell =85, we find LPs of these lengths. We then study the power spectral density (PSD) values of mm compressions of
Kotsireas Ilias S. +5 more
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Searching for partial Hadamard matrices [PDF]
, 2010 Three algorithms looking for pretty large partial Hadamard ma- trices are described. Here “large” means that hopefully about a third of a Hadamard matrix (which is the best asymptotic result known so far, [8]) is achieved.
Armario Sampalo, José Andrés +6 more
core
Almost Hadamard matrices: the case of arbitrary exponents
, 2012 In our previous work, we introduced the following relaxation of the Hadamard property: a square matrix $H\in M_N(\mathbb R)$ is called "almost Hadamard" if $U=H/\sqrt{N}$ is orthogonal, and locally maximizes the 1-norm on O(N).
Banica, Teodor, Nechita, Ion
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Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI
Advanced Science, EarlyView.ABSTRACT 2D cine phase contrast (CPC) MRI provides quantitative information on blood velocity and flow within the human vasculature. However, data acquisition is time‐consuming, motivating the reconstruction of the velocity field from undersampled measurements to reduce scan times. In this work, neural fields are proposed as a continuous spatiotemporal
Pablo Arratia +7 more
wiley +1 more source
Generation of strongly regular graphs from quaternary complex Hadamard matrices
Ceylon Journal of Science, 2018 A strongly regular graph with parameters (v, k, μ, λ) is a regular graph G with v vertices and k degree in which every two adjacent vertices have λ common neighbors and every two non-adjacent vertices have μ common neighbors. In this paper, we propose an
W. V. Nishadi +3 more
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Polychromatic speckle reduction in laser pico-projectors using stationary dual Hadamard diffusers [PDF]
Journal of the European Optical Society-Rapid Publications, 2014 Speckle from coherent light sources continues to be a limiting factor in the design and manufacturing of laser projectors. Utilizing diffractive diffusers has been an effective method for reducing monochromatic speckle contrast.
Thomas W., Middlebrook C.
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Systems of mutually unbiased Hadamard matrices containing real and complex matrices [PDF]
, 2013 We use combinatorial and Fourier analytic arguments to prove various non-existence results on systems of real and com- plex unbiased Hadamard matrices.
Matolcsi, Máté +2 more
core
Matrix vitrages and regular Hadamard matrices
Information and Control Systems, 2021 Introduction: The Kronecker product of Hadamard matrices when a matrix of order n replaces each element in another matrix of order m, inheriting the sign of the replaced element, is a basis for obtaining orthogonal matrices of order nm. The matrix insertion operation when not only signs but also structural elements (ornamental patterns of matrix ...
openaire +2 more sources