Results 261 to 270 of about 980,468 (308)

Impulse response analysis of coherent waveguide communication

International Journal of Microwave and Wireless Technologies, 2017
An impulse response method is carried out to analyze waveguide's information capacity within a coherent communication system. Such capability is typically estimated according to group delay variations (seconds/bandwidth/distance) after carrier-modulated data undergoes a dispersive medium. However, traditional group delay methods often ignore non-linear
Yanghyo Kim, Adrian Tang, Jason Cong, Mau-Chung Frank Chang, Tatsuo Itoh   +4 more
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News and correlations: an impulse response analysis [PDF]

, 2009
We proceed to an impulse response analysis on the conditional correlations between three stock indices returns: the Nikkei, the FTSE 100 and the S&P 500. As a first step, we estimate an extension of the general asymmetric dynamic conditional correlation (GADCC) model proposed by Cappiello, Engle and Sheppard (2006) to model the possible interactions ...
Le Pen, Yannick, Sévi, Benoît
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Impulse response analysis of baroreceptor sensitivity

American Journal of Physiology-Heart and Circulatory Physiology, 1997
The impulse response function (IRF) can express the dynamic relationship between systolic arterial pressure (SAP) and pulse interval (PI) and, consequently, represents an alternative method to assess baroreceptor sensitivity (BRS) in humans. Five normotensive and 13 hypertensive subjects (age 68 +/- 5 yr, range 60-74 yr) were studied at rest in the ...
R B, Panerai, M A, James, J F, Potter
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Acoustic diffraction analysis by the impulse response method: A line impulse response approach

The Journal of the Acoustical Society of America, 1984
Acoustic diffraction of plane impulsive waves is considered for free-field, baffled, and pressure release boundary conditions, in the case of an arbitrary spatial distribution of combined, amplitude-time delay modulation in an aperture. The method is based on the impulse response analysis of parallel aperture lines, the line impulse responses being ...
H. Lasota, R. Salamon, B. Delannoy
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Impulse response analysis of cointegrated systems

Journal of Economic Dynamics and Control, 1992
A vector autoregressive model with cointegrated variables and white noise disturbances is considered, and the estimation of the impulse responses is studied. Various economic interpretations and relations are explained. Giving the ML-estimates of the asymptotic variance-covariance matrices of estimators of coefficients matrices and of Gaussian noise ...
Lütkepohl, Helmut, Reimers, Hans-Eggert
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Impulse response analysis of 5577Å emissions

Planetary and Space Science, 1984
Abstract A method of time series analysis termed impulse response estimation is described. The method is applied to simultaneous ground based photometry measurements of the N 2 + ING band at 4278A and the 5577A line emission in order to estimate the response in 5577A to a discrete impulse in excitation rate.
G.B. Burns, J.S. Reid
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Analysis of impulse response characteristics of polymer ultrasonic transducers

NDT & E International, 1988
The impulse response characteristics of polymer ultrasonic transducers were analyzed using the Mason's equivalent circuit. These characteristics strongly depend on material factors of the piezoelectric polymer: the dielectric and mechanical internal loss factors, the electromechanical coupling factor and the acoustic impedance.
Kuniko Kimura, Hiroji Ohigashi
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Time–Frequency Analysis of the Impulse Response

IEEE Transactions on Signal Processing, 2019
The impulse response is a key function for the analysis and design of systems, therefore understanding its properties is a fundamental problem. To investigate the nonstationary structure of the impulse response, we derive its time–frequency representation both in the Wigner and smoothed Wigner distribution domains.
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Impulse response of a dental implant in bone by numerical analysis

Biomaterials, 1997
The osseointegration process of titanium dental implants in bone has been simulated previously using natural frequency and impulse excitation. However, the impulse strength was arbitrarily chosen and may not have yielded the correct frequencies and displacements to be compared with those measured in a clinical situation.
K R, Williams, A D, Williams
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Analysis of impulse response on walking stability using accelerometers

The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
The walking stability becomes less stable under the influence of a problematic posture or back. This problem was analyzed on the basis of two new approaches. The first approach is a newly developed measurement system, consisting of two accelerometers for walking analysis. It was a small, wearable, micro PC-assisted portable system.
Masako, Tsuruoka, Yuriko, Tsuruoka, Ryosuke, Shibasaki, Yoshifumi, Yasuoka, Shunji, Murai   +4 more
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