Results 11 to 20 of about 180,935 (266)

Joint Characterization of the Cryospheric Spectral Feature Space

open access: yesFrontiers in Remote Sensing, 2022
Multispectral and hyperspectral feature spaces are useful for a variety of remote sensing applications ranging from spectral mixture modeling to discrete thematic classification.
Christopher Small, Daniel Sousa
doaj   +1 more source

Distribution of Artisanal and Small-Scale Gold Mining in the Tapajós River Basin (Brazilian Amazon) over the Past 40 Years and Relationship with Water Siltation

open access: yesRemote Sensing, 2016
An innovative remote sensing approach that combines land-use change and water quality information is proposed in order to investigate if Artisanal and Small-scale Gold Mining (ASGM) area extension is associated with water siltation in the Tapajós River ...
Felipe de Lucia Lobo   +3 more
doaj   +1 more source

On the second spectrum of lattice modules

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2017
The second spectrum Specs(M) is the collection of all second elements of M. In this paper, we study the topology on Specs(M), which is a generalization of the Zariski topology on the prime spectrum of lattice modules. Besides some properties, Specs(M) is
Phadatare Narayan   +2 more
doaj   +1 more source

Effects of Small-Scale Gold Mining Tailings on the Underwater Light Field in the Tapajós River Basin, Brazilian Amazon

open access: yesRemote Sensing, 2017
Artisanal and Small-scale Gold Mining (ASGM) within the Amazon region has created several environmental impacts, such as mercury contamination and changes in water quality due to increased siltation. This paper describes the effects of water siltation on
Felipe de Lucia Lobo   +3 more
doaj   +1 more source

Joint Sparse Representation Hyperspectral Image Classification Based on Independent Space-spectrum Residual Fusion [PDF]

open access: yesJisuanji gongcheng, 2019
Aiming at the problem of spatial information and spectral information fusion in hyperspectral image classification,a joint sparse representation hyperspectral image classification algorithm based on independent space-spectrum residual fusion is proposed ...
LU Jia,BAO Wenxing
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 spectral quadruple for de Sitter space [PDF]

open access: yesJournal of Mathematical Physics, 2002
A set of data supposed to give possible axioms for spacetimes with a sufficient number of isometries in spectral geometry is given. These data are shown to be sufficient to obtain 1+1 dimensional de Sitter spacetime. The data rely at the moment somewhat on the guidance given by a required symmetry, in part to allow explicit calculations in a specific ...
Kopf, Tomáš, Paschke, Mario
openaire   +2 more sources

On the Asymptotic Optimality of Spectral Coarse Spaces

open access: yes, 2022
This paper is concerned with the asymptotic optimality of spectral coarse spaces for two-level iterative methods. Spectral coarse spaces, namely coarse spaces obtained as the span of the slowest modes of the used one-level smoother, are known to be very efficient and, in some cases, optimal.
Ciaramella G., Vanzan T.
openaire   +4 more sources

Ground-Based Doppler Asymmetric Spatial Heterodyne Interferometer: Instrument Performance and Thermospheric Wind Observations

open access: yesRemote Sensing
The thermosphere serves as a pivotal region for Sun–Earth interactions, and thermospheric winds are of great scientific importance for deepening insights into atmospheric dynamics, climate formation mechanisms, and space environment evolution. This study
Zhenqing Wen   +8 more
doaj   +1 more source

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