Results 31 to 40 of about 322,666 (307)

2-([1,2,4]triazolo[1,5-c]quinazoline-2-yl-)alkyl-(alkaryl-,aryl-)-amines and their derivatives. Message 2. The synthesis of (3Н-quinazoline-4-ylidene)hydrazides N-protected aminoacids, using a variety of amine-protecting approaches. Physical-chemical prop

open access: yesZaporožskij Medicinskij Žurnal, 2018
The synthetic potential of (3H-quinazoline-4-ylidene)hydrazides of carboxylic acids is significant in the context of new s-triazoloquinazolines creation and the obtained data of biological activity is a valid reason for the development of new methods of ...
Yu. V. Martynenko   +6 more
doaj   +1 more source

Hyperspectral Image Classification via Information Theoretic Dimension Reduction

open access: yesRemote Sensing, 2023
Hyperspectral images (HSIs) are one of the most successfully used tools for precisely and potentially detecting key ground surfaces, vegetation, and minerals.
Md Rashedul Islam   +4 more
doaj   +1 more source

A Novel Approach to Unsupervised Change Detection Based on Hybrid Spectral Difference

open access: yesRemote Sensing, 2018
The most commonly used features in unsupervised change detection are spectral characteristics. Traditional methods describe the degree of the change between two pixels by quantifying the difference in spectral values or spectral shapes (spectral curve ...
Li Yan, Wang Xia, Zhan Zhao, Yanran Wang
doaj   +1 more source

Novel spectral features of nanoelectromechanical systems [PDF]

open access: yesScientific Reports, 2014
Electron transport through a quantum dot or single molecule coupled to a quantum oscillator is studied by the Keldysh nonequilibrium Green's function formalism to obtain insight into the quantum dynamics of the electronic and oscillator degrees of freedom.
Tahir, Muhammad   +2 more
openaire   +3 more sources

awesome-spectral-indices/awesome-spectral-indices: 0.4.0

open access: yes, 2023
Awesome Spectral Indices v0.4.0 :rocket: :artificial_satellite: :seedling: Improvements The G1 (Green 1) standard was created (this standard matches B11 from MODIS). The T (Thermal Infrared) standard was created (this standard matches B6 from Landsat TM/
David Montero Loaiza   +3 more
core   +1 more source

A Cloud Detection Method Based on Spectral and Gradient Features for SDGSAT-1 Multispectral Images

open access: yesRemote Sensing, 2022
Due to the limited penetration of visible bands, optical remote sensing images are inevitably contaminated by clouds. Therefore, cloud detection or cloud mask products for optical image processing is a very important step.
Kaiqiang Ge   +4 more
doaj   +1 more source

Modification of spectral features by nonhuman primates [PDF]

open access: yesBehavioral and Brain Sciences, 2014
AbstractAckermann et al. discuss the lack of evidence for vocal control in nonhuman primates. We suggest that nonhuman primates may be capable of achieving greater vocal control than previously supposed. In support of this assertion, we discuss new evidence that nonhuman primates are capable of modifying spectral features in their vocalizations.
Daniel J, Weiss   +2 more
openaire   +2 more sources

Nonlinear spectral unmixing of hyperspectral images using Gaussian processes [PDF]

open access: yes, 2012
This paper presents an unsupervised algorithm for nonlinear unmixing of hyperspectral images. The proposed model assumes that the pixel reflectances result from a nonlinear function of the abundance vectors associated with the pure spectral components ...
Altmann, Yoann   +5 more
core   +1 more source

Fuzzy spectral and spatial feature integration for classification of nonferrous materials in hyperspectral data [PDF]

open access: yes, 2009
Hyperspectral data allows the construction of more elaborate models to sample the properties of the nonferrous materials than the standard RGB color representation.
Iriondo, Pedro M.   +4 more
core   +1 more source

A spectral and spatial transformer for hyperspectral remote sensing image super-resolution

open access: yesInternational Journal of Digital Earth
Due to the generally low spatial resolution of hyperspectral images (HSIs), early multispectral images lacked corresponding panchromatic bands, and as a result, fusion methods could not be used to enhance resolution.
Bingqian Wang   +5 more
doaj   +1 more source

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