Results 241 to 250 of about 14,176,106 (302)

An overview of the impedance models of the thorax and the origin of the impedance cardiography signal for modelling of the impedance signals

2014 IEEE Conference on Biomedical Engineering and Sciences (IECBES), 2014
This paper presents our work in the search for a realistic thorax impedance model that is suitable for the simulation of an impedance cardiography (ICG) signal model. The developed ICG signal model would be useful to evaluate the performance of e.g. algorithms for the separation of cardiac and respiratory signals. Five different impedance models of the
Mughal, Yar M.   +3 more
openaire   +1 more source

The Impedance of Curved Artery Models

Journal of Biomechanical Engineering, 1983
The impedance (pressure drop/flow rate) of four curved artery models has been determined experimentally for steady and periodic flows simulating conditions in the aortic arch. Steady flow results indicate that very short entry lengths are required for flow development in curved artery models, and impedance is elevated above straight tube values by a ...
S G, Kang, J M, Tarbell
openaire   +2 more sources

Outdoor ground impedance models

The Journal of the Acoustical Society of America, 2011
Many models for the acoustical properties of rigid-porous media require knowledge of parameter values that are not available for outdoor ground surfaces. The relationship used between tortuosity and porosity for stacked spheres results in five characteristic impedance models that require not more than two adjustable parameters.
Keith, Attenborough   +2 more
openaire   +2 more sources

Modelling for Scanning Impedance Imaging

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005
Scanning electrical impedance imaging (SII) is a previously-introduced high resolution imaging modality with the potential of imaging the electrical activities of biological tissues. In this paper, a detailed complex electrostatic model is derived to describe the physical phenomena of the SII system.
Hongze, Liu   +3 more
openaire   +2 more sources

Surface impedance models for high impedance surfaces

Applied Physics A, 2011
Different analytical and numerical methods for calculating the surface impedance of a high impedance surface (HIS) structure have been studied and compared. In this article, two new approaches are proposed for calculating the surface impedance for general 2D-spatial periodic HIS structures, which include both the symmetric and asymmetric planar ...
Zhu, Y., Bossavit, A., Zouhdi, Said
openaire   +2 more sources

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