Results 271 to 280 of about 1,396,897 (310)

Zero-crossing rate of differentiated speckle intensity

Journal of the Optical Society of America A, 1994
The zero-crossing rate of differentiated speckle whose intensity is governed by a negative exponential probability-density function (i.e., fully developed speckle) is evaluated in closed form with the use of an exact expression for the joint probability-density function of the intensity and its first two derivatives.
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Zero-crossing rates of functions of Gaussian processes

IEEE Transactions on Information Theory, 1991
Summary: Formulas for the expected zero-crossing rates of random processes that are monotone transformations of Gaussian processes can be obtained using two different techniques. The first technique involves the derivation of the expected zero-crossing rate for discrete-time processes and extends the result to the continuous-time case by using an ...
Barnett, John T., Kedem, Benjamin
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On the average crossing rates in selection diversity

IEEE Transactions on Wireless Communications, 2007
This letter presents new results on the average crossing rate of the combined signal of a selection diversity in Rayleigh fading channels. Exact closed-form expressions are derived for the inphase zero crossing rate, inphase rate of maxima, phase zero crossing rate, and the instantaneous frequency zero crossing rate of the output of the selection ...
Hong Zhang, Ali Abdi
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Multi-speaker activity detection using zero crossing rate

2016 International Conference on Communication and Signal Processing (ICCSP), 2016
Multi-Speaker activity (MSA) detection helps in detecting the presence of whether the speech signals has a single speaker or multiple speaker speeches in the speech signal. It is easy to calculate the ZCRs (zero crossing rate) of the speech signal and makes a comparison with a suitable threshold (Th).
V. Subba Ramaiah, R. Rajeswara Rao
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Monitoring surface EMG spectral changes by the zero crossing rate

Medical & Biological Engineering & Computing, 1986
A system is described which monitors spectral changes of the surface EMG. It is shown analytically that a relationship exists between the zero crossing rate (ZCR) and the mean, Fa, and median, Fm, frequencies of the surface EMG. Under the existing conditions of this relationship a system can be built which can estimate and monitor the Fa or Fm of the ...
G F, Inbar, J, Allin, O, Paiss, H, Kranz
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Intersystem crossing rate of C60-tryptophan

Chemical Physics Letters, 2022
Ruslan R. Ramasanoff, Petr A. Sokolov
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Time-dependent approaches for the calculation of intersystem crossing rates

The Journal of Chemical Physics, 2011
We present three formulas for calculating intersystem crossing rates in the Condon approximation to the golden rule by means of a time-dependent approach: an expression using the full time correlation function which is exact for harmonic oscillators, a second-order cumulant expansion, and a short-time approximation of this expression.
Mihajlo, Etinski, Jörg, Tatchen, Christel M, Marian   +2 more
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Trading rule profits in european currency spot cross-rates

Journal of Banking & Finance, 1996
Abstract The moving average (MA) trading rule is applied to six European spot cross-rates — JY/BP, DM/BP, JY/DM, SF/DM, SF/BP, and JY/SF — to see if opportunities for profitable trading exist. The results suggest that MA trading rules are marginally profitable only for the JY/DM and the JY/SF cross-rates, while trading rules are not profitable for ...
Chun I. Lee, Ike Mathur
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Asymmetric Volatility in Swiss Franc Cross-Rate Futures

SSRN Electronic Journal, 2010
I test for the presence of asymmetric volatility in the Swiss Franc cross-rate futures markets. My investigation is based on a variant of the heterogeneous autoregressive volatility model, using daily realized variance and return series from 2004 through 2009.
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Crossing Rate Analysis of NonGaussian Response of Linear Systems

Journal of Engineering Mechanics, 1996
A method is presented for estimating mean crossing rates for the stationary response of linear systems to non-normal excitation modeled by polynomials of Gaussian processes. Information about the non-Gaussian system response is derived in terms of statistical moments that are accurately calculated from a closed system of linear algebraic equations ...
M. D. Pandey, S. T. Ariaratnam
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