Results 11 to 20 of about 263,982 (264)

Research Progress of Electromagnetic Emissions Prediction Technology for Coal and Rock Fracture

open access: yesMeikuang Anquan, 2020
Electromagnetic emission method is an advanced technology to predict coal and gas outburst, rock burst and other dynamic disasters of coal and rock. It can realize non-contact, non-destructive and real-time monitoring, but its accuracy and efficiency ...
QIAO Zhen, GAO Jianning
doaj   +1 more source

Assessing Potential Spontaneous Combustion of Coal Gangue Dumps after Reclamation by Simulating Alfalfa Heat Stress Based on the Spectral Features of Chlorophyll Fluorescence Parameters

open access: yesRemote Sensing, 2022
The spontaneous combustion of coal gangue dumps after reclamation causes severe harm to the ecological environment surrounding mining areas. Using remote sensing technology to determine vegetation heat stress levels is an important way to evaluate the ...
Qiyuan Wang   +4 more
doaj   +1 more source

On the Relevance of Spectral Features for Instrument Classification [PDF]

open access: yes2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007
Automatic knowledge extraction from music signals is a key component for most music organization and music information retrieval systems. In this paper, we consider the problem of instrument modelling and instrument classification from the rough audio data.
Andreas Brinch Nielsen   +3 more
openaire   +2 more sources

Investigating the rate of turbidity impact on underwater spectral reflectance detection

open access: yesFrontiers in Marine Science, 2023
Spectral reflectance detection of the targeted object is considered a vital inherent optical property for its potential to provide abundant spectral information, which is crucial in underwater spectral imaging.
Hong Song   +7 more
doaj   +1 more source

Estimation of the Underlying F0 Range of a Speaker from the Spectral Features of a Brief Speech Input

open access: yesApplied Sciences, 2022
From a very brief speech, human listeners can estimate the pitch range of the speaker and normalize pitch perception. Spectral features which inherently involve both articulatory and phonatory characteristics were speculated to play roles in this process,
Wei Zhang   +4 more
doaj   +1 more source

Spectral features of the proximity effect

open access: yesPhysica B: Condensed Matter, 2000
We calculate the local density of states (LDOS) of a superconductor-normal metal sandwich at arbitrary impurity concentration. The presence of the superconductor induces a gap in the normal metal spectrum that is proportional to the inverse of the elastic mean free path $l$ for rather clean systems.
Pilgram, S., Belzig, W., Bruder, C.
openaire   +2 more sources

Spectral Embedding of Feature Hypergraphs [PDF]

open access: yes, 2008
In this paper we investigate how to establish a hypergraph model for characterizing object structures and how to embed this model into a low-dimensional pattern space. Each hyperedge of the hypergraph model is derived from a seed feature point of the object and embodies those neighbouring feature points that satisfy a similarity constraint. We show how
Peng Ren 0001   +2 more
openaire   +1 more source

The statistics of the BATSE spectral features

open access: yesFourth Huntsville gamma-ray burst symposium, 1998
The absence of a BATSE line detection in a gamma-ray burst spectrum during the mission's first six years has led to a statistical analysis of the occurrence of lines in the BATSE burst database; this statistical analysis will still be relevant if lines are detected.
Band, D.   +5 more
openaire   +2 more sources

A double-layer model for improving the estimation of wheat canopy nitrogen content from unmanned aerial vehicle multispectral imagery

open access: yesJournal of Integrative Agriculture, 2023
The accurate and rapid estimation of canopy nitrogen content (CNC) in crops is the key to optimizing in-season nitrogen fertilizer application in precision agriculture. However, the determination of CNC from field sampling data for leaf area index (LAI),
Zhen-qi LIAO   +7 more
doaj   +1 more source

Spectral features: how to reduce them [PDF]

open access: yesSPIE Proceedings, 2009
Spectral features are introduced by the diffuser that is used during on-board sun calibration. New findings are presented on how to reduce the size of these spectral features. Reduction can be obtained via optical design of the calibration unit, but also in creating a better diffuser.
Brug, H. van   +4 more
openaire   +1 more source

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