Results 121 to 130 of about 1,374,453 (166)

Correlations and Crossing Rates of Periodic-Stochastic Hydrologic Processes

Journal of Hydrologic Engineering, 2005
When a continuous valued hydrological series such as monthly stream flows is clipped by a constant or variable threshold series (such as water demand), a binary series may be obtained. Such a series may be useful for analyzing and modeling a variety of hydrological processes such as the occurrences of wet and dry days, deficit and surplus series, and ...
SALAS J. D, CHUNG C, CANCELLIERE, Antonino   +2 more
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Predicting Intersystem Crossing Rates with AIMS-DFT Molecular Dynamics

The Journal of Physical Chemistry A, 2018
Accurate prediction of the intersystem crossing rates is important for many different applications in chemistry, physics, and biology. Recently, we implemented the ab initio multiple spawning (AIMS) molecular dynamics method to describe the intersystem crossing processes, where nonradiative transitions between electronic states with different spin ...
Dmitry A. Fedorov, Aleksandr O. Lykhin, Sergey A. Varganov   +2 more
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Level crossing rates in binary counting systems

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1996
Abstract The statistics of threshold level crossings, which were first calculated by Rice [1], are applied to an amplifier system employing a realistic filter to derive the dependence of the rate on the magnitudes of the noise sources in the system.
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Cross-Rate Synchronization of Loran-C Using GPS

Navigation, 1988
Loran-C transmitters are grouped into different chains, each with a specified group repetition interval (GRI) or group repetition rate (1/GRI). Currently, Loran-C transmitters in different chains are not tightly synchronized. Consequently, Loran receivers can compute time differences only between signals with the same GRI.
PER K. ENGE, GARY NOSEWORTHY
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Speech zero-crossing rate compression for bandwidth compression

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1975
As analysis performed on a proposed special purpose hearing aid yields data on single-sidebanded voice zero-crossing rates extracted by a phase-locked loop (PLL), and also data on the logarithmically compressed voltage analog of the zero-crossing rate.
W. Done, R. Kirlin
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Automatic Continuous Speech Segmentation Using Level Crossing Rate

Advances in Pattern Recognition, 2006
In this paper, a new algorithm to automatically segment a continuous speech signal into phonemes is presented. The proposed method is based on the Average Level Crossing Rate (ALCR) of the speech signal, which is motivated by auditory models.1 It portrays that time information is more suitable to handle non-stationary signals. Based on this assumption,
null Nagesha, G. Hemantha Kumar
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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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