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Conventional photodetectors are mostly propelled by p-n junctions, where the detection wavelength is constrained by the bandgap of semiconductor material. Recently, a meta-linsulator-metal (MIM) configuration is demonstrated to be a promising candidate for the next generation photodetection due to its highly tunable operation wavelength, simple configuration, and possibly low cost. The MIM photodetector...
The hydrophobicity evaluation for polymer insulators continues to be a prominent characteristic. For the purpose of evaluating the hydrophobicity of polymer insulator, a VHF antenna was utilized to receive high frequency electromagnetic signals, which were induced during the surface discharge on the sample surface. The wavelet theory was applied to analyze the electromagnetic signals that were processed...
EH-4, belonging to device of mixed sources, is a frequency domain electromagnetic sounding system which combines man-made field source and natural field source. The special man-made electromagnetic wave emitter and the new type low noise magnetic unit are applied to combine man-made field source and natural field source, which makes it possible to survey part of man-made filed as well as natural field...
Currently geophysical electromagnetic exploration for metal ores is facing some problems such as shallow probing depths, low accuracy and resolution, and poor anti-interference ability. To solve these difficulties, it is a feasible approach to make use of the existing mine tunnels, the electromagnetic transmitter on the ground and the recorders at the underground (borehole) or ground (prefecture)...
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