Results 21 to 30 of about 137,938 (302)

Quantifying the Opportunity Limits of Automatic Residential Electric Load Shaping

open access: yesEnergies, 2019
Electric utility residential demand response programs typically reduce load a few times a year during periods of peak energy use. In the future, utilities and consumers may monetarily and environmentally benefit from continuously shaping load by ...
Robert Cruickshank   +4 more
doaj   +1 more source

REPRESENTATION OF GRADIENTS OF A SCALAR FIELD ON THE SPHERE USING A 2D FOURIER EXPRESSION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Representation of data on the sphere is conventionally done using spherical harmonics. Making use of the Fourier series of the Legendre function in the SH representation results in a 2D Fourier expression.
M. A. Sharifi, K. Ghobadi-Far
doaj   +1 more source

Distributed nonstationary control system synthesis on a basis of spectral representation in space-time domain

open access: yesВестник Самарского государственного технического университета. Серия: Технические науки, 2022
It is proposed, based on the spectral representation of the system, to solve the problem of synthesis of a distributed control plant described by PDE, using LMI technique. The system is described by a spectral characteristic vector with the amplitudes of
Vladimir A. Koval’   +2 more
doaj   +1 more source

A survey of kernel and spectral methods for clustering [PDF]

open access: yes, 2007
Clustering algorithms are a useful tool to explore data structures and have been employed in many disciplines. The focus of this paper is the partitioning clustering problem with a special interest in two recent approaches: kernel and spectral methods ...
Masulli, F.   +11 more
core   +1 more source

An interhemispheric, statistical study of nightside spectral width distributions from coherent HF scatter radars [PDF]

open access: yes, 2002
International audienceA statistical investigation of the Doppler spectral width parameter routinely observed by HF coherent radars has been conducted between the Northern and Southern Hemispheres for the nightside ionosphere.
Milan, S. E.   +16 more
core   +1 more source

bsamGP: An R Package for Bayesian Spectral Analysis Models Using Gaussian Process Priors

open access: yesJournal of Statistical Software, 2019
The Bayesian spectral analysis model (BSAM) is a powerful tool to deal with semiparametric methods in regression and density estimation based on the spectral representation of Gaussian process priors. The bsamGP package for R provides a comprehensive set
Seongil Jo   +3 more
doaj   +1 more source

Robust Spectral Clustering via Low-Rank Sample Representation

open access: yesApplied Computational Intelligence and Soft Computing, 2022
Traditional clustering methods neglect the data quality and perform clustering directly on the original data. Therefore, their performance can easily deteriorate since real-world data would usually contain noisy data samples in high-dimensional space. In
Hao Liang   +3 more
doaj   +1 more source

The ellipsoidal representation of spectral sensitivity

open access: yesVision Research, 1990
When plotted in three-dimensional color-space, thresholds of colored lights fall on or near the surface of an ellipsoid. Using data reported in the literature, we estimate the deviation between sets of spectral threshold measurements and the ellipsoid that passes closest to the data. Seventy-three percent of the reported spectral thresholds fall within
A B, Poirson, B A, Wandell
openaire   +2 more sources

A Novel Spatial-Spectral Sparse Representation for Hyperspectral Image Classification Based on Neighborhood Segmentation

open access: yes, 2016
Traditional hyperspectral image classification algorithms focus on spectral' information application, however, with the increase of spatial resolution of hyperspectral remote sensing images, hyperspectral imaging presents clustering properties on ...
Wang, HW   +11 more
core   +1 more source

Frequency-Domain Vision Transformers: Architectures, Applications, and Open Challenges

open access: yesApplied Sciences
Vision Transformers (ViTs) have achieved strong performance in computer vision but suffer from limited inductive bias, high data requirements, and reduced sensitivity to high-frequency visual details.
Muhammet Fatih Aslan   +2 more
doaj   +1 more source

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