Results 41 to 50 of about 2,945,859 (241)
Non-local gradient dependent operators
Advances in Mathematics, 2012 AbstractIn this paper we study a general class of “quasilinear non-local equations” depending on the gradient which arises from tug-of-war games. We establish a Cα/C1,α/C2,α regularity theory for these equations (the kind of regularity depending on the assumptions on the kernel), and we construct different non-local approximations of the p-Laplacian.
Clayton Bjorland +2 more
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Density-dependence tips the change of plant–plant interactions under environmental stress
Nature Communications, 2020 Density-dependence is rarely accounted for in plant-plant facilitation studies. Here the authors develop a framework that incorporates density-dependence in the stress-gradient hypothesis, and test it first through modeling and then empirically on ...
Ruichang Zhang, Katja Tielbörger
doaj +1 more source
Range dependent phase gradient autofocus [PDF]
IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174), 1998 The Phase Gradient Autofocus (PGA) algorithm has been widely used in spotlight synthetic aperture radar (SAR) to remove motion-induced blurs in the images. The PGA algorithm has been proven to be a superior autofocus method. PGA assumes a narrow beam, which is valid for most SAR systems.
A.E. Robertson +4 more
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Location of Nodal Solutions for Quasilinear Elliptic Equations with Gradient Dependence
, 2017 Existence and regularity results for quasilinear elliptic equations driven by \begin{document}$(p, q)$\end{document} -Laplacian and with gradient dependence are presented.
D. Motreanu +2 more
semanticscholar +1 more source
Advances in Materials Science and Engineering, 2022 Gravity is the primary load source in geotechnical engineering, and its effect becomes extremely important in these cases such as lunar research station construction and in situ resource utilization. However, at the current stage, the study on the effect
Ruilin Li +4 more
doaj +1 more source
An isogeometric analysis approach to gradient‐dependent plasticity [PDF]
International Journal for Numerical Methods in Engineering, 2017 SummaryGradient‐dependent plasticity can be used to achieve mesh‐objective results upon loss of well‐posedness of the initial/boundary value problem because of the introduction of strain softening, non‐associated flow, and geometric nonlinearity.
Kolo, I., de Borst, R.
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Magnetic Resonance in Medicine, 2019 Oscillating gradient spin‐echo (OGSE) diffusion MRI provides information about the microstructure of biological tissues by means of the frequency dependence of the apparent diffusion coefficient (ADC).
A. Arbabi, J. Kai, Ali R. Khan, C. Baron
semanticscholar +1 more source
Dispersive properties of gradient-dependent and rate-dependent media
Mechanics of Materials, 1994 The dispersive behaviour of waves propagating in gradient-dependent and rate-dependent media is investigated analytically and numerically. Attention is focused on the proper modelling of dynamic strain localisation and the crucial role that dispersion plays in this.
de R René Borst, Lambertus J. Sluys
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Color Gradients in Early-Type Galaxies in Clusters at the Redshift from 0.37 to 0.56 [PDF]
, 2000 Color gradients in elliptical galaxies in distant clusters ($z=0.37-0.56$) are examined by using the archival deep imaging data of Wide Field Planetary Camera 2 (WFPC2) on-board the Hubble Space Telescope (HST). Obtained color gradients are compared with the two model gradients to examine the origin of the color gradients.
arxiv +1 more source
Smoothed Gradient Clipping and Error Feedback for Decentralized Optimization under Symmetric Heavy-Tailed Noise [PDF]
arXiv, 2023 Motivated by understanding and analysis of large-scale machine learning under heavy-tailed gradient noise, we study decentralized optimization with gradient clipping, i.e., in which certain clipping operators are applied to the gradients or gradient estimates computed from local nodes prior to further processing.
arxiv