Results 61 to 70 of about 235,909 (235)

Nonaxisymmetric stability in the shearing sheet approximation

open access: yes, 2006
Aims: To quantify the transient growth of nonaxisymmetric perturbations in unstratified magnetized and stratified non-magnetized rotating linear shear flows in the shearing sheet approximation of accretion disc flows.
A. Brandenburg   +27 more
core   +4 more sources

ωk algorithm for multi-receiver synthetic aperture sonar based on exact analytical two-dimensional spectrum

open access: yesThe Journal of Engineering, 2019
Based on the method of deriving two-dimensional wavenumber spectrum by using instantaneous Doppler wavenumber in bistatic synthetic aperture radar, the analytical solution of two-dimensional wavenumber spectrum of multi-receiver synthetic aperture sonar (
Jinbo Wang, Jinsong Tang, Zhen Tian
doaj   +1 more source

Wavenumber-4 spectral component extracted from TIMED/SABER observations

open access: yesEarth and Planetary Physics, 2020
The wavenumber spectral components WN4 at the mesosphere and low thermosphere (MLT) altitudes (70–10 km) and in the latitude range between ±45° are obtained from temperature data (T) observed by the Sounding of the Atmosphere using Broadband Emission ...
Xing Li   +3 more
doaj   +1 more source

Random Diffusion Model with Structure Corrections

open access: yes, 2010
The random diffusion model is a continuum model for a conserved scalar density field driven by diffusive dynamics where the bare diffusion coefficient is density dependent.
David D. McCowan   +5 more
core   +1 more source

Sequence-based genome-wide association study of individual milk mid-infrared wavenumbers in mixed-breed dairy cattle

open access: yesGenetics Selection Evolution, 2021
Background Fourier-transform mid-infrared (FT-MIR) spectroscopy provides a high-throughput and inexpensive method for predicting milk composition and other novel traits from milk samples.
Kathryn M. Tiplady   +11 more
doaj   +1 more source

Low‐wavenumber Raman scattering in glycerol [PDF]

open access: yesJournal of Raman Spectroscopy, 2001
Analysis of the low-wavenumber Raman data of glycerol as a function of temperature is presented. For temperatures lower than the glass transition temperature the scattering intensity is interpreted on the basis of a model starting from the analogies between the density of vibrational states for the crystalline and the glassy phases and taking into ...
Moura, C., Zwick, A.
openaire   +2 more sources

Range Localization of a Moving Source Based on Synthetic Aperture Beamforming Using a Single Hydrophone in Shallow Water

open access: yesApplied Sciences, 2020
To localize a moving source in shallow water with a single hydrophone, a passive range localization method based on synthetic aperture beamforming is proposed.
Jin-Yan Du, Zong-Wei Liu, Lian-Gang Lü
doaj   +1 more source

wavenumber

open access: yes, 2014
Citation: 'wavenumber' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.W06664 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Wavenumber selection via spatial parameter jump [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2018
The Swift–Hohenberg equation describes an instability which forms finite-wavenumber patterns near onset. We study this equation posed with a spatial inhomogeneity; a jump-type parameter that renders the zero solution stable for x <0 and unstable for x >0.
Arnd Scheel, Jasper Weinburd
openaire   +3 more sources

Impact imaging of aircraft composite structure based on a model-independent spatial-wavenumber filter.

open access: yesUltrasonics, 2016
The spatial-wavenumber filtering technique is an effective approach to distinguish the propagating direction and wave mode of Lamb wave in spatial-wavenumber domain. Therefore, it has been gradually studied for damage evaluation in recent years.
Lei Qiu, B. Liu, S. Yuan, Z. Su
semanticscholar   +1 more source

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