Results 251 to 260 of about 8,962,473 (314)

High-Frequency Ventilation

Seminars in Respiratory and Critical Care Medicine, 1998
High-frequency ventilation (HFV) provides respiratory gas exchange using positive airway pressure-driven tidal breaths that are often smaller than anatomic dead space and breathing frequencies several times faster than normal. Gas transport with HFV involves nonconvective mechanisms such as Taylor dispersion, coaxial flow, and augmented diffusion ...
openaire   +3 more sources

Constant Frequency Oscillators*

Bell System Technical Journal, 1931
The manner in which the frequency of vacuum tube oscillators depends upon the operating voltages is discussed. The theory of the dependence is derived and is shown to indicate methods of causing the frequency to be independent of the operating voltages. These methods are applied in detail to the more commonly used oscillator circuits. Experimental data
openaire   +2 more sources

Generalized frequency-sum beamforming for low frequencies

The Journal of the Acoustical Society of America
For direction-of-arrival (DOA) estimation in the low-frequency range, we improve spatial resolution using generalized frequency-sum (gFS) beamforming with the Qth order frequency-sum autoproduct. The order Q does not exceed the maximum value, determined by the criteria that the sum of frequencies used to create the autoproduct must be less than the ...
Jeunghoon Lee, Yongsung Park, Peter Gerstoft   +2 more
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Frequency Code: Orofacial Correlates of Fundamental Frequency

Phonetica, 1987
Abstract In the human voice, lip retraction as in smiling can be associated with high fundamental (F₀) and formant frequencies. The aim of this study was to investigate under naturalistic conditions the cross-species generality of the frequency code hypothesis and related orofacial correlates in F₀.
openaire   +2 more sources

Matching pursuits with time-frequency dictionaries

IEEE Transactions on Signal Processing, 1993
S. Mallat, Zhifeng Zhang
semanticscholar   +1 more source

Frequency divider

Abstract of WO2006016312 A frequency divider comprising, a first latch circuit (10) and a second latch circuit (10'), the second latch circuit (10') being crossed-coupled to the first latch circuit (10). Each latch (10; 10') comprises a respective sense amplifier coupled to a respective latch (11).
Acar, M., Leenaerts, D.M.W., Nauta, Bram
openaire  

Availability: A heuristic for judging frequency and probability

, 1973
A. Tversky, D. Kahneman
semanticscholar   +1 more source

The wavelet transform, time-frequency localization and signal analysis

IEEE Transactions on Information Theory, 1990
I. Daubechies
semanticscholar   +1 more source

The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz.

Physics in Medicine and Biology, 1996
S. Gabriel, R. Lau, C. Gabriel
semanticscholar   +1 more source

High-resolution frequency-wavenumber spectrum analysis

, 1969
J. Capon
semanticscholar   +1 more source