Results 21 to 30 of about 263,982 (264)

BATSE evidence for GRB spectral features [PDF]

open access: yesFourth Huntsville gamma-ray burst symposium, 1998
We have developed an automatic search procedure to identify low-energy spectral features in GRBs. We have searched 133,000 spectra from 117 bright bursts and have identified 12 candidate features with significances ranging from our threshold of P = 5E-5 to P = 1E-7.
Briggs, M. S.   +5 more
openaire   +2 more sources

Driving drowsiness detection using spectral signatures of EEG-based neurophysiology

open access: yesFrontiers in Physiology, 2023
Introduction: Drowsy driving is a significant factor causing dire road crashes and casualties around the world. Detecting it earlier and more effectively can significantly reduce the lethal aftereffects and increase road safety.
Saad Arif, Saba Munawar, Hashim Ali
doaj   +1 more source

Compressive spectral feature sensing

open access: yesIET Image Processing, 2019
To reduce the size of spectral data, compressive sensing imaging systems are developed to sample fewer measurements than the Nyquist‐rate ones, from which the original data can be recovered by the optimisation model and algorithm. However, this is not a cheap option for the case where the real‐time acquisition of spectral information is required.
Zelong Wang, Jubo Zhu
openaire   +1 more source

Small-size spectral features for machine learning in voice signal analysis and classification tasks

open access: yesInformatika, 2023
Objectives. The problem of developing a method for calculating small-sized spectral features that increases the efficiency of existing machine learning systems for analyzing and classifying voice signals is being solved.Methods.
D. S. Likhachov   +3 more
doaj   +1 more source

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

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

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