Results 21 to 30 of about 1,143,033 (294)
Ecological Indicators, 2021 The accurate classification of wetland vegetation is essential for rapid assessment and management. The Honghe National Nature Reserve (HNNR), located in Northeast China, was studied.
Man Liu +7 more
doaj +1 more source
Quasars and the Big Blue Bump [PDF]
, 2004 We investigate the ultraviolet-to-optical spectral energy distributions (SEDs) of 17 active galactic nuclei (AGNs) using quasi-simultaneous spectrophotometry spanning 900-9000 Angstrom (rest frame).
Anuradha Koratkar +19 more
core +1 more source
Non-destructive monitoring of amylose content in rice by UAV-based hyperspectral images
Frontiers in Plant Science, 2022 Amylose content (AC) is an important indicator for rice quality grading. The rapid development of unmanned aerial vehicle (UAV) technology provides rich spectral and spatial information on observed objects, making non-destructive monitoring of crop ...
Fumin Wang +8 more
doaj +1 more source
Spectral Stability of Unitary Network Models
, 2015 We review various unitary network models used in quantum computing, spectral analysis or condensed matter physics and establish relationships between them. We show that symmetric one dimensional quantum walks are universal, as are CMV matrices.
Asch, Joachim +2 more
core +3 more sources
Consistency of spectral clustering in stochastic block models [PDF]
, 2014 We analyze the performance of spectral clustering for community extraction in stochastic block models. We show that, under mild conditions, spectral clustering applied to the adjacency matrix of the network can consistently recover hidden communities ...
Lei, Jing, Rinaldo, Alessandro
core +1 more source
Running of the spectral index and inflationary dynamics of F(R) gravity
Physics Letters B, 2022 In this work we shall provide a model-independent general calculation of the running of the spectral index for vacuum F(R) gravities. We shall exploit the functional form of the spectral index and of the tensor-to-scalar ratio in order to present a ...
S.D. Odintsov, V.K. Oikonomou
doaj +1 more source
Standard GRB Spectral Models “Misused”?
The Astrophysical Journal, 2022 Abstract The standard model characterizing the gamma-ray burst (GRB) spectrum invokes a four-parameter empirical function, the so-called the BAND model. An alternative model named cutoff power law (COMP) implements a power law with an exponential cutoff.
openaire +2 more sources
Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
, 2008 We study non-Gaussianity, the spectral index of primordial scalar fluctuations and tensor modes in models where fluctuations from the inflaton and the curvaton can both contribute to the present cosmic density fluctuations.
A. A. Starobinsky +5 more
core +2 more sources
База данных параметров базисных мод и коэффициентов cпектральных моделей геодинамо
Vestnik KRAUNC: Fiziko-Matematičeskie NaukiСпектральные модели геодинамо строятся на основании конечного набора базисных стационарных полей (мод). Поля скорости, температуры и магнитной индукции представляются в моделях в виде линейных комбинаций базисных мод с коэффициентами (амплитудами ...
Водинчар, Г.М. +2 more
doaj +1 more source
A Comparison of Frequency Downshift Models of Wave Trains on Deep Water
, 2018 Frequency downshift (FD) in wave trains on deep water occurs when a measure of the frequency, typically the spectral peak or the spectral mean, decreases as the waves travel down a tank or across the ocean.
Butterfield, Isabelle +2 more
core +1 more source