Results 231 to 240 of about 110,528 (265)

Estimation of the signal-to-noise ratio with amplitude modulation spectrograms

Speech Communication, 2002
Summary: An algorithm is proposed which automatically estimates the local signal-to-noise ratio (SNR) between speech and noise. The feature extraction stage of the algorithm is motivated by neurophysiological findings on amplitude modulation processing in higher stages of the auditory system in mammals.
Jürgen Tchorz, Birger Kollmeier
openaire   +2 more sources

Surface amplitude ratios near a critical end point

Physical Review Letters, 1991
We provide the first experimental test of the universality of a surface amplitude ratio near a critical end point by measuring the modified critical adsorption amplitude ratio, ${\mathit{R}}_{\mathit{M}\mathit{A}}$, for the liquid mixtures aniline+cyclohexane and isobutyric acid+water.
openaire   +2 more sources

Contrast of Fringes (Polarization and Amplitude Ratio)

2010
This excerpt gives a succinct explanation of the contrast of fringes (polarization and amplitude ratio).
openaire   +1 more source

Universal amplitude ratios of critical sound attenuation

Zeitschrift f�r Physik B Condensed Matter, 1987
The universal amplitude ratios for ultrasonic attenuation above and below the critical point are determined for uniaxial magnets, the gas liquid critical point, binary mixtures and related universality classes. For uniaxial ferromagnets also the scaling functions are computed.
R. Dengler, F. Schwabl
openaire   +1 more source

Bitwise Log-Likelihood Ratios for Quadrature Amplitude Modulations

IEEE Communications Letters, 2015
For an increase in spectral efficiency and improvement of error performance, a high-order modulation and an advanced channel coding scheme are jointly used for many digital communication systems. In this paper, a new and simple method for calculating bitwise log-likelihood ratios which are required for soft decision decoding is proposed for $M ...
openaire   +1 more source

Universal amplitude ratios for scaling corrections on Ising strips

Physical Review E, 2011
We study the (analytic) finite-size corrections in the Ising model on the strip with free, fixed (++), and mixed boundary conditions. For fixed (++) boundary conditions, the spins are fixed to the same values on two sides of the strip. We find that subdominant finite-size corrections to scaling should be to the form a(p)/N(2p-1) for the free energy f(N)
openaire   +2 more sources

Comments on "Degradation of signal-to-noise ratio due to amplitude ripple

IEEE Transactions on Information Theory, 1995
Summary: \textit{R. Sadr}, \textit{M. Shahshahani} and \textit{W.J. Hurd} [ibid. 35, 874- 878 (1989)] showed that when the maximum passband amplitude ripple is \(2\Delta\), then the signal-to-noise ratio is degraded by at most \((1- \Delta^2)\). A very simple proof is given in this correspondence.
openaire   +2 more sources

Amplitude ratios of several groups of variable stars

Astrophysics and Space Science, 1970
The observed positions of classical cepheids, RR Lyrae stars, δ Scuti stars and dwarf cepheids in the logg-logTe plane form a continuous sequence, thereby defining the location of maximum instability. The amplitude ratio (the ratio of radial velocity amplitude to light amplitude) is small for variables at the upper end of the instability strip and ...
openaire   +1 more source

Lensless complex amplitude demodulation based on deep learning in holographic data storage

Opto-Electronic Advances, 2023
Jianying Hao, Xiaodi Tan, Guohai Situ
exaly  

Large amplitude oscillatory shear flow: Microstructural assessment of polymeric systems

Progress in Polymer Science, 2022
Giovanniantonio Natale, , Simon Rogers
exaly