An effect of using a helical conductor rather than a straight one is that the matching impedance is changed from the nominal 50 ohms to between 25 to 35 ohms base impedance.
2.
Another useful tool for analyzing transformers is to have the base change formula that allows the engineer to go from a base impedance with one set of a base voltage and base power to another base impedance for a different set of a base voltage and base power.
3.
Another useful tool for analyzing transformers is to have the base change formula that allows the engineer to go from a base impedance with one set of a base voltage and base power to another base impedance for a different set of a base voltage and base power.
4.
Where Z 0 is the quasi-static portion of the electrical impedance ( base impedance ), ?Z R are the changes of impedance due to the respiratory cycle, and ?Z C are the changes of impedance due to the cardiac cycle . ?Z R is considered an artifact akin to the estimation of stroke volume and is therefore suppressed.
5.
The model considers the peak amplitude of \ frac { dZ ( t ) } { dt } divided by the base impedance Z 0 as an index for peak aortic acceleration, and as an index of contractility of the heart, or ICON . The general equation for estimating stroke volume by means of thoracic electrical bioimpedance calculates the product of a patient constant C P ( in ml ), the mean blood velocity index \ bar { v } FT ( measured in s " 1 during flow time, and FT ( flow time measured in s ):
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