Results 41 to 50 of about 2,120,250 (297)
Spectral Simplicity and Asymptotic Separation of Variables [PDF]
Communications in Mathematical Physics, 2011 We describe a method for comparing the real analytic eigenbranches of two families of quadratic forms that degenerate as t tends to zero. One of the families is assumed to be amenable to `separation of variables' and the other one not. With certain additional assumptions, we show that if the families are asymptotic at first order as t tends to 0, then ...
Hillairet, Luc, Judge, Chris
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Editorial for Special Issue “Hyperspectral Imaging and Applications”
Remote Sensing, 2019 Due to advent of sensor technology, hyperspectral imaging has become an emerging technology in remote sensing. Many problems, which cannot be resolved by multispectral imaging, can now be solved by hyperspectral imaging.
Chein-I Chang +3 more
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Study on Spectral Interference in the Determination of Vanadium by ICP-OES
, 2020 Vanadium is an important scarce resource and strategic metal, and often coexists with a variety of complex metals in the form of secondary mineral phases in nature.
Zhang Yi +7 more
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Remote Sensing, 2023 In hyperspectral unmixing (HU), spectral variability in hyperspectral images (HSIs) is a major challenge which has received a lot of attention over the last few years.
Burkni Palsson +2 more
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Spectral Characteristics of Common Reed Beds: Studies on Spatial and Temporal Variability
Remote Sensing, 2016 Reed beds are the second largest producer of biomass in Olkiluoto Island. Quantitative information on the extent and amount of reed stands is an integral part of the biosphere assessment related to long-term safety analysis of nuclear fuel repository ...
Jyrki Tuominen, Tarmo Lipping
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OPTICAL MICROVARIABILITY IN QUASARS: SPECTRAL VARIABILITY [PDF]
The Astrophysical Journal, 2010 We present a method that we developed to discern where the optical microvariability (OM) in quasars originates: in the accretion disk (related to thermal processes) or in the jet (related to non-thermal processes). Analyzing nearly simultaneous observations in three different optical bands of continuum emission, we are able to determine the origin of ...
Ramirez, A. +2 more
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Quadratic Clustering-Based Simplex Volume Maximization for Hyperspectral Endmember Extraction
Applied Sciences, 2022 The existence of intra-class spectral variability caused by differential scene components and illumination conditions limits the improvement of endmember extraction accuracy, as most endmember extraction algorithms directly find pixels in the ...
Xiangyue Zhang, Yueming Wang, Tianru Xue
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Spectral asymptotics for $V$-variable Sierpinski gaskets [PDF]
Annales de l'Institut Henri Poincaré, Probabilités et Statistiques, 2017 The family of $V$-variable fractals provides a means of interpolating between two families of random fractals previously considered in the literature; scale irregular fractals ($V=1$) and random recursive fractals ($V=\infty$). We consider a class of $V$-variable affine nested fractals based on the Sierpinski gasket with a general class of measures. We
Freiberg, U. +2 more
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Spectral analysis of heart period variability in anorexia nervosa [PDF]
Vojnosanitetski Pregled, 2005 The aim of this study was to investigate the response of autonomic cardiac control to postural change using spectral analysis, in patients with anorexia nervosa.
Platiša Mirjana M. +2 more
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Spectral variability of the particulate backscattering ratio
Optics Express, 2007 The spectral dependency of the particulate backscattering ratio is relevant in the fields of ocean color inversion, light field modeling, and inferring particle properties from optical measurements. Aside from theoretical predictions for spherical, homogeneous particles, we have very limited knowledge of the actual in situ spectral variability of the ...
Whitmire, A. L. +3 more
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