Single photon scatter compensation by photopeak energy distribution analysis

1992 ◽  
Vol 11 (2) ◽  
pp. 161-164 ◽  
Author(s):  
K.W. Logan ◽  
W.D. McFarland
Keyword(s):  
Energy Distribution ◽  
Single Photon ◽  
Distribution Analysis ◽  
Scatter Compensation

Adsorption of levofloxacin onto mechanochemistry treated zeolite: Modeling and site energy distribution analysis

2019 ◽  
Vol 222 ◽  
pp. 30-34 ◽  
Author(s):  
Zhen Chen ◽  
Wei Ma ◽  
Guang Lu ◽  
Fanqing Meng ◽  
Shibo Duan ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Distribution Analysis ◽  
Site Energy

Site-energy distribution analysis of humic acids adsorption by zeolitic tuff

2007 ◽  
Vol 14 (3) ◽  
pp. 363-368 ◽  
Author(s):  
S. Capasso ◽  
S. Salvestrini ◽  
E. Coppola ◽  
A. Buondonno ◽  
C. Colella
Keyword(s):  
Energy Distribution ◽  
Humic Acids ◽  
Distribution Analysis ◽  
Zeolitic Tuff ◽  
Site Energy

Photochemistry with high power ultraviolet lasers

1983 ◽  
Vol 61 (5) ◽  
pp. 1023-1026 ◽  
Author(s):  
R. J. Donovan ◽  
C. Fotakis ◽  
A. Hopkirk ◽  
C. B. McKendrick ◽  
A. Torre
Keyword(s):  
Energy Distribution ◽  
High Power ◽  
Single Photon ◽  
Laser Induced Fluorescence ◽  
Multiphoton Excitation ◽  
Dissociation Process ◽  
Two Photon ◽  
Photon Excitation ◽  
Ultraviolet Lasers ◽  
Two Photon Excitation

Rotationally resolved photofragment fluorescence from OH(A2Σ+) following the coherent two-photon excitation of H2O with a KrF laser (248 nm), is reported and the dynamics of the dissociation process are discussed. Fluorescence from CN(B2Σ+) following two-photon excitation of ICN is also described. In both cases the energy distribution in the photofragments is shown to differ significantly from that observed with single-photon excitation at closely similar energies.Two further examples of multiphoton excitation, involving CS2 and SO2, are briefly discussed. In these cases absorption of a further photon, by fragments produced in the primary step, gives rise to strong laser-induced fluorescence.

Copula-Based Time-Frequency Distribution Analysis for Planetary Gearbox Fault Detection

2017 ◽  
Author(s):  
Libin Liu ◽  
Ming J. Zuo
Keyword(s):  
Fault Detection ◽  
Energy Distribution ◽  
Simulated Data ◽  
Frequency Resolution ◽  
Data Sets ◽  
Distribution Analysis ◽  
Frequency Distributions ◽  
Copula Theory ◽  
Planetary Gearbox ◽  
Time Frequency

Linear and bilinear time-frequency distributions (TFDs) have been employed in planetary gearbox fault diagnosis. For linear TFDs, there is a trade-off between the time localization and frequency resolution and the spectrogram may not have correct energy marginals. For bilinear TFDs, they cannot be interpreted as an energy distribution because of the existence of possible negative values even though they are designed for energy density representation. To overcome these shortcomings, TFDs based on copula theory have been reported in the literature. In this paper, we analyze two simulated data sets using linear TFD and copula-based TFD. The results show that the constructed copula-based TFD has desirable properties of being positive, free from cross-term interference, having high time-frequency resolution and matching well with true marginals. The copula-based TFD is also able to locate fault-induced impulses by vertical lines over a certain frequency range in the time-frequency domain. Consequently, this study confirms the advantages of the copula-based TFD as an energy distribution and its capability in fault detection for planetary gearboxes.

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