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The surface flashover phenomena of insulating materials in vacuum greatly weakens the overall performance of vacuum-dielectric system, which seriously limits its development. The improvement of surface flashover characteristics of insulators in vacuum becomes a significant challenge for the development of high voltage electrical equipment. In this paper, we report a simple and convenient way to achieve...
This paper presents an image analysis method based on a short-time-Fourier-transform (STFT) for extracting the size of polystyrene microspheres with different nominal diameters from diffraction images obtained with a newly developed diffraction imaging flow cytometer. The center frequency of STFT and its relation with the image row index are explored to extract the microspheres' diameter. We have...
Electrospinning is a straightforward and effective technique to produce nanofiber nonwovens. In this paper, a comb ionomer of poly(ethylene covinyl alcohol) end-capped with sulfonic acid (EVOH-g-SO 3H) was synthesized by two-step synthesis process and electrospun into nonwoven membranes. The effect of processing parameters on the fibrous and beads morphology was investigated by scanning electron microscopy...
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