Results 11 to 20 of about 97,608 (251)

A note on linear compositions of the Mellin convolution operators in the weighted Mellin-Lebesgue spaces

Demonstratio Mathematica
In this article, we express a numerical form of the convergence using the suitable modulus of smoothness for linear compositions of the Mellin convolution operators.
Ozsarac Firat
doaj   +2 more sources

GLAGC: Adaptive Dual-Gamma Function for Image Illumination Perception and Correction in the Wavelet Domain

Sensors, 2021
Low-contrast or uneven illumination in real-world images will cause a loss of details and increase the difficulty of pattern recognition. An automatic image illumination perception and adaptive correction algorithm, termed as GLAGC, is proposed in this ...
Wenyong Yu, Haiming Yao, Dan Li, Gangyan Li, Hui Shi   +4 more
doaj   +1 more source

Complete Approximations by Multivariate Generalized Gauss-Weierstrass Singular Integrals

Moroccan Journal of Pure and Applied Analysis, 2021
This research and survey article deals exclusively with the study of the approximation of generalized multivariate Gauss-Weierstrass singular integrals to the identity-unit operator.
Anastassiou George A.
doaj   +1 more source

Hyperspectral Image Superresolution Using Global Gradient Sparse and Nonlocal Low-Rank Tensor Decomposition With Hyper-Laplacian Prior

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
This article presents a novel global gradient sparse and nonlocal low-rank tensor decomposition model with a hyper-Laplacian prior for hyperspectral image (HSI) superresolution to produce a high-resolution HSI (HR-HSI) by fusing a low-resolution HSI (LR ...
Yidong Peng, Weisheng Li, Xiaobo Luo, Jiao Du   +3 more
doaj   +1 more source

Spectral Generalized Multi-Dimensional Scaling [PDF]

, 2013
Multidimensional scaling (MDS) is a family of methods that embed a given set of points into a simple, usually flat, domain. The points are assumed to be sampled from some metric space, and the mapping attempts to preserve the distances between each pair ...
Aflalo, Yonathan, Dubrovina, Anastasia, Kimmel, Ron   +2 more
core   +1 more source

Regularity of the Einstein Equations at Future Null Infinity [PDF]

, 2009
When Einstein's equations for an asymptotically flat, vacuum spacetime are reexpressed in terms of an appropriate conformal metric that is regular at (future) null infinity, they develop apparently singular terms in the associated conformal factor and ...
Andersson L, Buchman L Pfeiffer H, Christodoulou D, Frauendiener J, Geroch R, Moncrief V, Oliver Rinne, Penrose R, Rinne O, Vincent Moncrief, Zenginoğlu A   +10 more
core   +1 more source

Exploratory Analysis of Functional Data via Clustering and Optimal Segmentation [PDF]

, 2010
We propose in this paper an exploratory analysis algorithm for functional data. The method partitions a set of functions into $K$ clusters and represents each cluster by a simple prototype (e.g., piecewise constant).
Abraham, Auger, Bellman, Bernard Hugueney, Coifman, Cottrell, Cottrell, Devroye, Fabrice Rossi, Frappart, Georges Hébrail, Healey, Huber, Jackson, Krier, Lin, Picard, Ramsay, Rose, Rossi, Saito, Stone, Tikhonov, Yves Lechevallier   +23 more
core   +3 more sources

Global Smoothness and Shape Preserving Interpolation by Classical Operators

, 2005
S. Gal
openaire   +2 more sources

Discrete mechanics and optimal control: An analysis [PDF]

, 2009
The optimal control of a mechanical system is of crucial importance in many application areas. Typical examples are the determination of a time-minimal path in vehicle dynamics, a minimal energy trajectory in space mission design, or optimal motion ...
Junge, Oliver, Marsden, Jerrold E., Ober-Blöbaum, Sina   +2 more
core   +3 more sources

No interactions for a collection of Weyl gravitons intermediated by a scalar field [PDF]

, 2006
The cross-couplings among several Weyl gravitons (described in the free limit by a sum of linearized Weyl actions) in the presence of a scalar field are studied with the help of the deformation theory based on local BRST cohomology.
A. C. LUNGU, C. BIZDADEA, E. M. CIOROIANU, Henneaux M.   +3 more
core   +2 more sources