Results 231 to 240 of about 28,834 (268)
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Electrode Modelling in Electrical Impedance Tomography
SIAM Journal on Applied Mathematics, 1992Summary: In electrical impedance tomography, measurements of an applied electrical current and the corresponding electrical potential are made on a finite number of electrodes placed on the boundary of an object. These measurements are then used to reconstruct the electrical conductivity distribution in the interior of the object.
Paulson, Kevin +2 more
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Modeling of low-frequency pulmonary impedance in dogs [PDF]
Journal of Applied Physiology, 1990 The mechanical impedance of the lungs (ZL) was measured in open-chest dogs with small-amplitude pseudorandom volume oscillations between 0.125 and 5 Hz, at mean transpulmonary pressures (Ptp) of 0.2, 0.4, and 0.8 kPa. At the lowest frequencies, the pulmonary resistance showed a marked negative frequency dependence and mirrored the changes in the ...
Hantos Zoltán +4 more
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(Keynote) Modeling of Impedance
ECS Meeting Abstracts, 2016Sophisticated models exist for many electrochemical systems, based on physical and chemical laws. These may be transient or steady. They generally involve many physical quantities, and a corresponding number of governing equations, distributed over a spatial region.
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The Proton Synchrotron Transverse impedance model
2014The current knowledge of the transverse impedance of the CERN Proton Synchrotron (PS) has been established by theoretical computations, electromagnetic simulations and beam-based measurements at different energies. The transverse coherent tune and phase advance shifts as a function of intensity have been measured in order to evaluate the total ...
PERSICHELLI, SERENA +5 more
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Instantaneous model impedance control for robots
Proceedings. 2000 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2000) (Cat. No.00CH37113), 2002We propose a new method for implementing impedance control, which is designed to take advantage of the error-correction capabilities of position controllers, while maintaining good impedance tracking performance. The proposed instantaneous model impedance control re-initializes the impedance model to the current position of the robot so the model does ...
Tomer Valency, Miriam Zacksenhouse
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Measurement of the glottal impedance with a mechanical model
The Journal of the Acoustical Society of America, 1989An approximate but realistic model of the human larynx was constructed to gain better knowledge of the complex glottal impedance and its dependence on glottal width, flow, and frequency. The glottal width was adjustable from 0 to 3 mm, the flow from 0 to 500 cm3/s.
S, Rösler, H W, Strube
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Experimental modelling of biomechanical impedance characteristics
Medical & Biological Engineering & Computing, 1986New experimental modelling of biomechanical impedance is proposed. The parameters which express the impedance characteristics are simply determined by impedance measurement. Audiofrequencies below about 1000 Hz and comparatively lower preloads (below about 6370 kg m−2) are chosen as the research domain.
T, Yamamoto, H, Oka
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Modeling Degradation in SOEC Impedance Spectra
Journal of The Electrochemical Society, 2013Solid oxide cell (SOC) performance is limited by various processes. One way to investigate these processes is by electrochemical impedance spectroscopy. In order to quantify and characterize the processes, an equivalent circuit can be used to model the SOC impedance spectra (IS).
Jensen, Soren Hojgaard +4 more
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Model Predictive Impedance Control: A Model for Joint Movement
Journal of Motor Behavior, 1997Impedance control has been suggested as the strategy employed by the central nervous system to control human postures and movements. A realization of this strategy is presented that uses a model predictive control algorithm as a higher motor controller. External disturbances are explicitly included in the model.
F, Towhidkhah, R E, Gander, H C, Wood
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Models for representing the acoustic radiation impedance of the mouth
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1985The acoustic radiation impedance of the mouth is important in the production of speech in that it affects the amount of acoustic power radiated away from the mouth and it influences the acoustic response of the excited vocal tract. Five existing methods of modeling the acoustic radiation impedance of the mouth are: 1) the pulsating sphere, 2) the ...
Chalker D.A., Mackerras D.
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