Results 1 to 10 of about 7,958,125 (144)
Impedance Enhancement of Textile Grounded Loop Antenna Using High-Impedance Surface (HIS) for Healthcare Applications. [PDF]
Sensors (Basel), 2020 In this paper, impedance matching enhancement of a grounded wearable low-profile loop antenna is investigated using a high-impedance surface (HIS) structure. The wearable loop antenna along with the HIS structure is maintained low-profile, making it a suitable candidate for healthcare applications.
Bait-Suwailam MM +2 more
europepmc +6 more sources
Magneto-Impedance Biosensor Sensitivity: Effect and Enhancement [PDF]
Sensors, 2020 Biosensors based on magneto-impedance (MI) effect are powerful tools for biomedical applications as they are highly sensitive, stable, exhibit fast response, small in size, and have low hysteresis and power consumption. However, the performance of these biosensors is influenced by a variety of factors, including the design, geometry, materials and ...
Abkar Sayad +2 more
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An image-enhancement technique for electrical impedance tomography [PDF]
Inverse Problems, 1994 Summary: We propose an idea for reconstructing `blocky' conductivity profiles in electrical impedance tomography. By `blocky' profiles, we mean functions that are piecewise constant, and hence have sharply defined edges. The method is based on selecting a conductivity distribution that has the least total variation from all conductivities that are ...
Dobson, David C., Santosa, Fadil
semanticscholar +3 more sources
IEEE transactions on power electronics, 2022 Due to the successive switching actions in a power electronic system, considerable conducted electromagnetic interference (EMI) is generated. This has been a major concern in designing power converters, which requires additional EMI filtering efforts ...
Zhe Zhang, A. Bazzi
semanticscholar +1 more source
Enhancing Impedance Imaging Through Multimodal Tomography [PDF]
IEEE Transactions on Biomedical Engineering, 2011 Several noninvasive modalities including electrical impedance tomography (EIT), magnetic induction tomography (MIT), and induced-current EIT (ICEIT) have been developed for imaging the electrical conductivity distribution within a human body. Although these modalities differ in how the excitation and detection circuitry (electrodes or coils) are ...
Doğa, Gürsoy +3 more
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Polarization impedance measurement cavity enhanced laser absorption spectroscopy
Optics Express, 2021 We present a theoretical overview and experimental demonstration of a continuous-wave, cavity-enhanced optical absorption spectrometry method to detect molecular gas. This technique utilizes the two non-degenerate polarization modes of a birefringent cavity to obtain a zero background readout of the intra-cavity absorption.
Ya J. Guan +6 more
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Power quality enhancement in islanded microgrids via closed-loop adaptive virtual impedance control
Protection and Control of Modern Power Systems, 2023 The high proportion of nonlinear and unbalanced loads results in power quality issues in islanded microgrids. This paper presents a novel control strategy for harmonic and unbalanced power allocation among distributed generators (DGs) in microgrids ...
Yang Wang +5 more
semanticscholar +1 more source
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020 This article deals with the postfault synchronization of a voltage source converter based on the droop control. In the case of large disturbances on the grid, the current is limited via current limitation algorithms such as the virtual impedance.
T. Qoria +5 more
semanticscholar +1 more source
Impedance-Based Modeling and Common Bus Stability Enhancement Control Algorithm in DC Microgrid
IEEE Access, 2020 In this paper, impedance modeling of a DC microgrid system consisting of a source and load converter, including an input filter, is performed. Impedance-based modeling has been used to derive mathematical models of the output impedance of the source ...
Jae-Suk Lee +3 more
semanticscholar +1 more source
Perfusion Enhancement with Respiratory Impedance After Stroke (PERI-Stroke) [PDF]
Neurotherapeutics, 2019 Intrathoracic pressure influences cardiac output and may affect cerebral blood flow (CBF). We aimed to quantify the cerebral hemodynamic response to intrathoracic pressure reduction in patients with acute ischemic stroke using a noninvasive respiratory impedance (RI) device.
Christopher G. Favilla +11 more
openaire +2 more sources