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In this paper, a method is developed to optimize the geometry and to improve the sensitivity of four-terminal planar Hall devices under the voltage biasing. Using the conformal mapping, we can construct geometrically different Hall devices with the same sensitivity. The Hall voltage sensitivities thus obtained are close to the theoretical limit. Our analysis is verified by a recent experiment on graphene...
The mass sensitivity distribution curve of quartz crystal resonators (QCRs) with common circular electrodes is bell-shaped; however, a uniform mass sensitivity distribution is expected for highly accurate and repeatable measuring results. Pioneers designed a ring electrode QCR with a bimodal distribution curve of mass sensitivity, and an obvious concavity is presented between two peak points for a...
Electrical impedance tomography (EIT) is one of the important research topics in today's biomedical engineering. EIT system applies currents through electrodes attached to the surface of the human body and measures the resulting voltages to reconstruct and display approximate pictures of the electric conductivity and permittivity inside the body. Electrode lies in the front of the whole EIT system...
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