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The diagnosis of Proton Exchange Membrane Fuel Cells (PEMFC) is based on reliable models and methods able to follow the system operating state. Impedance spectroscopy is usually used to characterize FC systems and deduce impedance models. Indeed, the deformations of the FC impedance spectrum in the Nyquist plane translate eventual malfunctions or degradations of the system as the stack flooding or...
This paper describes mathematical modeling of squirrel cage design AC current shunts. These shunts are designed to have a flat frequency response up to 100 kHz. Model was made using lumped element modeling and then analytical transfer function and input impedance of the shunt were derived from the model. Then these functions have been used in excel where frequency response and input impedance as a...
The mathematical simulations based on the proposed transfer function of the waveguide intra-body communication (IBC) have been introduced in this paper. Firstly, a waveguide IBC circuit model was developed and the corresponding parameters were discussed. Secondly, the transfer function of the waveguide IBC was derived and proposed. Finally, the signal attenuation characteristics of the waveguide IBC...
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