Results 231 to 240 of about 3,095,615 (291)

Multidimensional maturation of oxytocin neurons: A principal component analysis of postnatal development. [PDF]

J Neuroendocrinol
Maejima Y, Suzuki M, Matsuoka W, Ueta Y, Shimomura K.   +4 more
europepmc   +1 more source

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Instantaneous spectra and instantaneous frequency

Proceedings of the IEEE, 1970
A simple relation exists between the instantaneous frequency and the instantaneous spectrum of an analytic signal which does not depend on an assumption that the instantaneous frequency varies slowly.
M H Ackroyd
exaly   +2 more sources

Instantaneous Frequency Analysis. [PDF]

IACR Cryptol. ePrint Arch., 2013
This paper investigated the use of instantaneous frequency (IF) instead of power amplitude and power spectrum in side-channel analysis. By opposition to the constant frequency used in Fourier Transform, instantaneous frequency reflects local phase ...
Korkikian, Roman, Naccache, David, Ozari de Almeida, Guilherme   +2 more
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ON INSTANTANEOUS FREQUENCY

Advances in Adaptive Data Analysis, 2009
Instantaneous frequency (IF) is necessary for understanding the detailed mechanisms for nonlinear and nonstationary processes. Historically, IF was computed from analytic signal (AS) through the Hilbert transform. This paper offers an overview of the difficulties involved in using AS, and two new methods to overcome the difficulties for computing IF ...
Norden E. Huang, Zhaohua Wu, Steven R. Long, Kenneth C. Arnold, Xianyao Chen, Karin Blank   +5 more
openaire   +1 more source

Seismic attribute benchmarking on instantaneous frequency [PDF]

Geophysics, 2019
The complex seismic trace analysis is a widely applied and versatile method for computing seismic attributes. Instantaneous frequency is an important complex trace attribute, and it is generally used for identifying specific seismic events, such as ...
Víctor Aarre, Liyuan Xing
exaly   +3 more sources

On the concept of instantaneous frequency

Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002
The concept of instantaneous frequency is still not clearly defined. Current operational definitions give rise to physical paradoxes, and difficult proper interpretation of the obtained results. In this paper, we discuss why those paradoxes appear, and show how they can be avoided.
Paulo M. Oliveira, Victor Barroso
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Instantaneous frequency and time-frequency distributions

1995 International Conference on Acoustics, Speech, and Signal Processing, 2002
It is generally stated that the conditional mean frequency of a time-frequency distribution (TFD) should equal the instantaneous frequency of the signal. The commonly accepted definition of instantaneous frequency as the derivative of the phase of the analytic signal sometimes leads to curious results.
Berkant Tacer, Patrick J. Loughlin
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Instrument for the measurement of the instantaneous frequency

IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309), 2000
This paper describes the design and implementation of an instrument for the measurement of the instantaneous frequency of a signal. It is based on the extensive use of signal processing techniques and their implementation on efficient processors (digital signal processors).
Alfonso Carlosena, Carlos Macua, Miroslav Zivanovic   +2 more
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Circuit for measurement of instantaneous frequency

American Journal of Physiology-Heart and Circulatory Physiology, 1980
This paper describes a circuit that measures the instantaneous frequency of a pulse train applied to the input. Analog outputs are provided that are linearly proportional to the interval between successive pulses and to the reciprocal of that same interval.
R, McGillivray, R, Wald
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