Results 231 to 240 of about 2,138,942 (281)
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1993
Signal averaging is a gated summation of high temporal resolution surface ECG signals from several hundred beats, resulting in a high signal-to-noise ratio1. The technique has been used to study low voltage potentials at the end of the QRS complex2–12. These studies revealed high frequency low-amplitude signal in the terminal segment of the QRS complex
Josef Machac, J. Anthony Gomes
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Signal averaging is a gated summation of high temporal resolution surface ECG signals from several hundred beats, resulting in a high signal-to-noise ratio1. The technique has been used to study low voltage potentials at the end of the QRS complex2–12. These studies revealed high frequency low-amplitude signal in the terminal segment of the QRS complex
Josef Machac, J. Anthony Gomes
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ANALOGUE SIGNAL PREDICTOR: FREQUENCY-DOMAIN ANALYSIS
International Journal of Bifurcation and Chaos, 2007Frequency-domain analysis of the recently suggested analogue signal predictor is performed. In addition, the operation of the circuit is demonstrated in the high frequency and very high frequency ranges by means of PSPICE simulator employing high-speed operational amplifiers.
Meškauskas, Mantas +2 more
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Robust time-domain frequency analysis
SPIE Proceedings, 1992One domain in which the ordering filters have not appeared is frequency analysis. Simultaneously one must note that the impulse rejection properties of the ordering filters could be very beneficial due to the lack of robustness of the DFT/FFT. Another problem with the DFT/FFT is the ambiguity of the estimate of frequency at a point (frequency ...
Daniel Shelton, Harold G. Longbotham
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Abstract This chapter reviews the essentials of the harmonic analysis of fractional processes in the frequency domain. Section 1 briefly sets out the theory of harmonic analysis and defines concepts such as transfer function and spectral density. Section 2 shows how this theory applies to the fractional model. Section 3 considers partial
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1988
The analysis of electrical signals is a fundamental problem for most engineers. As we have seen, even if the basic problem is not electrical, the parameters of interest are usually changed from pressure, force, temperature etc. into an electrical quantity by means of transducers.
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The analysis of electrical signals is a fundamental problem for most engineers. As we have seen, even if the basic problem is not electrical, the parameters of interest are usually changed from pressure, force, temperature etc. into an electrical quantity by means of transducers.
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2001
Although the differential equation is a basic system description, obtaining this equation can be tedious and time-consuming. Consequently for a time-invariant system this approach is avoided in practice, except in special cases. The Fourier and Laplace transforms offer an alternative approach for characterizing and analyzing these systems. Insight into
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Although the differential equation is a basic system description, obtaining this equation can be tedious and time-consuming. Consequently for a time-invariant system this approach is avoided in practice, except in special cases. The Fourier and Laplace transforms offer an alternative approach for characterizing and analyzing these systems. Insight into
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Time Domain to Frequency Domain: Spectrum Analysis
2014The concept of spectrum can be attributed to Isaac Newton, who, with the aid of a prism, discovered that sunlight can be decomposed into a spectrum of colors from red to violet in about 1700. This indicates that any light comprises numerous components of light of various colors (wave lengths).
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