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This paper presents a conformal log-periodic array covering an ultra-wideband of 2–18 GHz. It employs monopoles of different heights for the high band, top-hat monopoles for the middle band, and… (More)
A novel compact log-periodic array antenna is proposed in this paper. It employs printed planar helical dipoles as its elements. The size of this array antenna is only 58% of a conventional… (More)
This paper gives the new idea about purity and mixture about the genetics.Under this concept,entropy theory will be dicussed in detail.
The white light emitting phosphor Ca2Al2SiO7:Dy3+ was synthesized by a conventional high-temperature solid-state method. X-ray diffraction and photoluminescence spectra were used to characterize the… (More)
Objective To compare the quality between the glass specimens of acaroid mites prepared with three mounting media.Methods Polyethylene lactic acid phenol medium, Berlese medium, and Hoyer's medium… (More)