Time-domain viscoelastic constitutive model based on concurrent fitting of frequency-domain characteristics

2015 ◽  
Vol 55 (11) ◽  
pp. 2336-2344 ◽  
Author(s):  
Tz-Cheng Chiu ◽  
Bo-Sheng Lee ◽  
Dong-Yi Huang ◽  
Yu-Ting Yang ◽  
Yi-Hsiu Tseng
Keyword(s):  
Constitutive Model ◽  
Frequency Domain ◽  
Time Domain ◽  
Model Based ◽  
Viscoelastic Constitutive Model

Quantification of prostate MRSI data by model-based time domain fitting and frequency domain analysis

2006 ◽  
Vol 19 (2) ◽  
pp. 188-197 ◽  
Author(s):  
Pieter Pels ◽  
Esin Ozturk-Isik ◽  
Mark G. Swanson ◽  
Leentje Vanhamme ◽  
John Kurhanewicz ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Model Based ◽  
Mrsi Data

JOINT INTERPRETATION OF AIRBORNE ELECTROMAGNETIC DATA IN THE TIME DOMAIN AND FREQUENCY DOMAIN

2018 ◽  
Vol 12 (7-8) ◽  
pp. 76-83
Author(s):  
E. V. KARSHAKOV ◽  
J. MOILANEN
Keyword(s):  
Fourier Transform ◽  
Frequency Domain ◽  
Time Domain ◽  
Frequency Interval ◽  
Single Spectrum ◽  
Simultaneous Inversion ◽  
Homogeneous Half Space ◽  
Time Domain Data ◽  
The Time Domain

Тhe advantage of combine processing of frequency domain and time domain data provided by the EQUATOR system is discussed. The heliborne complex has a towed transmitter, and, raised above it on the same cable a towed receiver. The excitation signal contains both pulsed and harmonic components. In fact, there are two independent transmitters operate in the system: one of them is a normal pulsed domain transmitter, with a half-sinusoidal pulse and a small "cut" on the falling edge, and the other one is a classical frequency domain transmitter at several specially selected frequencies. The received signal is first processed to a direct Fourier transform with high Q-factor detection at all significant frequencies. After that, in the spectral region, operations of converting the spectra of two sounding signals to a single spectrum of an ideal transmitter are performed. Than we do an inverse Fourier transform and return to the time domain. The detection of spectral components is done at a frequency band of several Hz, the receiver has the ability to perfectly suppress all sorts of extra-band noise. The detection bandwidth is several dozen times less the frequency interval between the harmonics, it turns out thatto achieve the same measurement quality of ground response without using out-of-band suppression you need several dozen times higher moment of airborne transmitting system. The data obtained from the model of a homogeneous half-space, a two-layered model, and a model of a horizontally layered medium is considered. A time-domain data makes it easier to detect a conductor in a relative insulator at greater depths. The data in the frequency domain gives more detailed information about subsurface. These conclusions are illustrated by the example of processing the survey data of the Republic of Rwanda in 2017. The simultaneous inversion of data in frequency domain and time domain can significantly improve the quality of interpretation.

MESFET large-signal model based on small-signal measurements for time-domain CAD

1988 ◽  
Vol 24 (15) ◽  
pp. 973 ◽  
Author(s):  
A. Ouslimani ◽  
G. Vernet ◽  
J.C. Henaux ◽  
P. Crozat ◽  
R. Adde
Keyword(s):  
Time Domain ◽  
Small Signal ◽  
Large Signal ◽  
Signal Model ◽  
Model Based

Time‐domain and frequency‐domain analysis of acoustic scattering by spheres

1994 ◽  
Vol 95 (5) ◽  
pp. 2478-2487 ◽  
Author(s):  
Peter D. Thorne ◽  
Terry J. Brudner ◽  
Kendall R. Waters
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Acoustic Scattering ◽  
Domain Analysis ◽  
Frequency Domain Analysis
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