As they are spread across almost all applications based on electrical circuits, frequency filters form one of the most complex issues on electronic devices. There exist a great number of different design methods based on various approaches. A large group of these filters is based on active components, namely amplifiers, that are equipped with the appropriate feedback to achieve the desired tran...

Corrosion detection can be modelled by the Laplace equation for an electric or a heat potential in a simply connected planar domain D with a homogeneous impedance boundary condition on a non-accessible part of the boundary ∂D. We consider the inverse problem to simultaneously recover the non-accessible part of the boundary and the impedance function from two pairs of Cauchy data on the accessib...

studies show that any complications including hemorrhage, lack of blood supply, lack of oxygen supply, and death of cells in a tissue, will have a clear effect on electrical properties of that tissue. thus, by measuring impedance of a set of tissues, potential problems of the damaged tissue may be found. since electrical impedance is closely related to the measuring frequency, obviously, every ...

We have developed a new algorithm, RBF-MREIT, for Magnetic Resonance Electrical Impedance Tomography (MREIT) by applying the radial basis function (RBF) network and Simplex method. RBF-MREIT uses only one component of the measured magnetic flux density to reconstruct the conductivity images, and provides a solution to the rotation problem in MREIT. The proposed algorithm is tested on a three-sp...

2 Introduction We use throughout the e+iωt convention. Acoustic liners are usually described in frequency domain by their impedance. If we use a numerical method in time domain, this is to be translated into an equivalent relation. This is not straightforward. For example, it is principally not possible for an non-real impedance to retain this value for all frequencies. We have to extend the im...

Wireless power transfer (WPT) has attracted an ever increasing interest from both industry and academics over the past few years. Its applications vary from small power devices such as mobile phones and tablets to high power electric vehicles, and from small transfer distance of centimeters to large distance of tens of centimeters. In order to achieve a high efficiency WPT system, each circuit ...

Impedance control is a compliance control strategy capable of accommodating both unconstrained and constrained motions. The performance of impedance controllers depends heavily upon environment dynamics and the choice of target impedance. To maintain performance for a wide range of environments, target impedance needs to be adjusted adaptively. In this paper, a geometric view on impedance contr...

It is essential to continuously and non-invasively monitor the cardiac pumping function in clinical setting. Thus, the study aimed to explore a regional impedance phethysmographic method to assess the changes in stroke volume. To do this, we developed a plethysmographic device that was capable of delivering a single-frequency current with constant amplitude and of recording electrical impedance...

The tapered pile offers sustainable use of construction materials due to its higher axial and lateral capacity better performance owing geometry. This paper develops a semi-analytical solution the vertical dynamic impedance based on Winkler theory transfer matrix method. accuracy reliability proposed approach are verified by comparing functions cylindrical piles obtained from analytical finite ...

The isolated, ventilated and instrumented mouse lung preparation allows steady and pulsatile pulmonary vascular pressure-flow relationships to be measured with independent control over pulmonary arterial flow rate, flow rate waveform, airway pressure and left atrial pressure. Pulmonary vascular resistance is calculated based on multi-point, steady pressure-flow curves; pulmonary vascular impeda...