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1
Novel Ultrasound Signal Processing Methods for Attenuation ...
block power spectrum refers to the power spectrum obtained from the averaging of individual Fourier spectra ... Selection of the dimensions of an appropriate block size for calculating the power spectrum is an important step in attenuation ...
2
POF - Polymer Optical Fibers for Data Communication - 301페이지
Due to the wide spectral width of the LED of approximately 20 nm and more, it is possible that a filter effect occurs in combination with the attenuation spectrum. This is particularly conspicuous in the window around 650 nm, since the edges of ...
Olaf Ziemann, Jürgen Krauser, Peter E. Zamzow, 2013
3
The Radio Noise Spectrum - 117페이지
There is good agreement with respect to the source of energy —that is, radiation from atmospherics, radiation which undergoes only a small amount of attenuation. Using both a loop and a vertical whip antenna, Holzer and Deal18 have taken ...
Donald Howard Menzel, 1960
4
Deep Seismic Sounding of the Earth’s Crust and Upper Mantle
If it is considered that the observed frequency for deep waves is close to the peak frequency of the shot spectrum, then in order to avoid the effect of attenuation, it is necessary to assume that the spectral response functions for deep boundaries ...
Irina P. Kosminskaya, 2012
5
Handbook of Medical Imaging: Physics and psychophysics - 36페이지
1.2.4.2 Polyenergetic versus monoenergetic attenuation As Figures 1.24, 1.25, and 1.26 illustrate, attenuation ... For an x-ray spectrum consisting of many different energies (a polyenergetic spectrum), the attenuation curve (solid line on Figure ...
Jacob Beutel, Harold L. Kundel, Richard L. Van Metter, 2000
6
Autism Spectrum Disorders - 656페이지
Underlying neurons fire synchronously when an individual is at rest, but during the execution and observation of an action, the underlying neurons activate, and this results in the attenuation of the mu rhythm amplitude. This attenuation pattern ...
David Amaral, Geraldine Dawson, Daniel Geschwind, 2011
7
Electrical Spectrum & Network Analyzers: A Practical Approach
Therefore, for the example spectrum analyzer, a commercially available attenuator was used. A lO-dB-per-step ... The required attenuation range may be calculated from the noise floor and the maximum power the attenuator can handle.
8
Earthquake Source Mechanics - 37호 - 317페이지
[1982] pointed out that under cases of uncorrected attenuation, one may be prone to choose a steeper slope for the high ... bars is the same as the shape of a magnitude M— 1 spectrum with Act = 3.2 bars, except for a multiplication constant.
Shamita Das, John Boatwright, Christopher H. Scholz, 1986
9
Quantitative Ultrasound in Soft Tissues - 72페이지
The total attenuation is the effective attenuation along the propagation path from the source thru the intervening tissue layers ... In this chapter, we will review how the attenuation impacts the backscattered power spectrum as well as summarize ...
Jonathan Mamou, Michael L. Oelze, 2013
10
Encyclopedia of Computer Science and Technology: Volume 41 ...
Early optical fibers had a simple attenuation spectrum. with an attenuation minimum around 0.8 lim. Corresponding to the leftmost "valley" in Figure 5. optical attenuation at this global minimum was around 2 dB/km. which translates into the ...
Allen Kent, James G. Williams, 1999
