Results 31 to 40 of about 104,853 (292)
Negative frequencies in pulse propagation equations and the double analytic signal
New Journal of Physics, 2023 In recent years, the topic of negative frequencies has resurfaced in optics motivated by the optical analogue of Hawking radiation. We discuss the physical meaning of negative frequencies and the conditions under which they are relevant.
Raul Aguero-Santacruz, David Bermudez
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ResourcesIt is of great importance to evaluate simple methods to identify mineral occurrence for the future development of society. Applying a reconnaissance magnetic data analysis can help detect the main structural trends mounted to the occurrence of minerals ...
Mohamed Al Deep +2 more
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Analytic signal in many dimensions [PDF]
, 2018 Submitted to Applied and Computational Harmonic AnalysisIn this paper we extend analytic signal to the multidimensional case. First it is shown how to obtain separate phase-shifted components and how to combine them into instantaneous amplitude and phase.
Tsitsvero, Mikhail +2 more
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Annals of Geophysics, 2002 Land magnetic and electromagnetic data enhancement procedures were employed to follow the extensions of the observed anomalies on the surface downwards in the deeper levels and to recognize any possible relations between the localization of uranium ...
A. S. M. Assran
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An analytical solution for the SSFP signal in MRI [PDF]
Magnetic Resonance in Medicine, 2003 AbstractAmong previous analyses of the steady‐state free‐precession (SSFP) signal in rapid MRI, one treatment resulted in equations that require the evaluation of infinite binomial series. Here, an analytical solution is derived by a transformation into the power series expansion of the derivative of the inverse sine function, which is essentially a ...
Wolfgang, Hänicke, Horst U, Vogel
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Squeal occurrence classification using a harmonic balance vector signal model. [PDF]
Brake squeal is an instability that generates self-excited limit cycles which vary with time and operating conditions in real experiments. To analyze test results, it is proposed to use a Harmonic Balance Vector (HBV) signal model.
BALMES, Etienne +3 more
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Efficient Estimation of the Helicopter Blade Parameter by Independent Component Analysis
IEEE Access, 2020 We propose an efficient method to estimate various parameters of a helicopter blade including the number Bnum and the length by separating the blade signal using independent component analysis (ICA) and an analytic solution obtained by monostatic ...
Ino Choi +3 more
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New method for edges detection of magnetic sources using logistic function
Геофизический журнал, 2018 The tilt angle of the analytic signal amplitude (TA) is defined as the arctangent of the ratio of the first vertical derivative to the total horizontal derivative of the analytic signal amplitude. It is commonly used as a useful tool to estimate edges of
L. T. Pham +3 more
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Selective analytic signal construction from a non-uniformly sampled bandpass signal [PDF]
, 2014 International audienceThis paper proposes a method that simultaneously builds the analytic signal from non-uniform samples of a bandpass signal and rejects interferences.
Guy Lesthievent +9 more
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Bandpass phase shifter and analytic signal generator [PDF]
, 2016 In this note, a novel tunable bandpass filter/phase shifter implementation (with a Hilbert transformer as a special case) is proposed. The filter can also be used to synthesize a bandpass analytic signal from a real-valued signal.
Kumaresan, Ramdas, Peddinti, Vijay Kumar
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