Results 21 to 30 of about 1,897,301 (192)

A new view of nonlinear water waves: the Hilbert spectrum [PDF]

open access: yes, 1999
We survey the newly developed Hilbert spectral analysis method and its applications to Stokes waves, nonlinear wave evolution processes, the spectral form of the random wave field, and turbulence.
Huang, Norden E.   +2 more
core   +1 more source

Prospects of microwave-induced thermoacoustic imaging

open access: yesJournal of Electronic Science and Technology, 2023
Microwave-induced thermoacoustic imaging (MTAI) has advantages including the large imaging depth, high imaging resolution, high imaging contrast, and fast imaging speed.
Xing-Hua Wang, Huan Qin
doaj   +1 more source

xkl: A legacy software for detailed acoustic analysis of speech made modern

open access: yesSoftwareX, 2023
The determination of the fundamental properties of speech relies on a fine and precise estimation of temporal and spectral properties of speech segments.
Luca De Nardis   +3 more
doaj   +1 more source

Preliminary Spectral Analysis of SN 1994I [PDF]

open access: yes, 1995
We present optical spectra of the Type Ic supernova 1994I in M51 and preliminary non-LTE analysis of the spectra. Our models are not inconsistent with the explosions of C+O cores of massive stars.
Baron, E.   +4 more
core   +3 more sources

Improved Cheeger's Inequality: Analysis of Spectral Partitioning Algorithms through Higher Order Spectral Gap [PDF]

open access: yes, 2013
Let \phi(G) be the minimum conductance of an undirected graph G, and let 0=\lambda_1
Gharan, Shayan Oveis   +4 more
core   +3 more sources

Convolutional Edge Constraint-Based U-Net for Salient Object Detection

open access: yesIEEE Access, 2019
The salient object detection is receiving more and more attention from researchers. An accurate saliency map will be useful for subsequent tasks. However, in most saliency maps predicted by existing models, the objects regions are very blurred and the ...
Le Han, Xuelong Li, Yongsheng Dong
doaj   +1 more source

EXAMINATION OF SPECTRAL TRANSFORMATIONS ON SPECTRAL MIXTURE ANALYSIS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
While many spectral transformation techniques have been applied on spectral mixture analysis (SMA), few study examined their necessity and applicability.
Y. Deng, C. Wu
doaj   +1 more source

Fast Spectral Clustering for Unsupervised Hyperspectral Image Classification

open access: yesRemote Sensing, 2019
Hyperspectral image classification is a challenging and significant domain in the field of remote sensing with numerous applications in agriculture, environmental science, mineralogy, and surveillance.
Yang Zhao, Yuan Yuan, Qi Wang
doaj   +1 more source

Visual Analysis of Carbendazim Residues in Carrot Tubers via Postionization Mass Spectrometry Imaging

open access: yesApplied Sciences
Carbendazim (CBZ) residues in food are a severe threat to food safety, and their detection is a challenging problem in food science. We introduce here a new method based on laser desorption postionization mass spectrometry imaging (LDPI-MSI) for ...
Tianyu Wang, He Zhang, Yongjun Hu
doaj   +1 more source

Spectral Analysis of Percolation Hamiltonians

open access: yes, 2004
We study the family of Hamiltonians which corresponds to the adjacency operators on a percolation graph. We characterise the set of energies which are almost surely eigenvalues with finitely supported eigenfunctions.
Adachi   +22 more
core   +4 more sources

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