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The electronic structure and optical properties of pure and Mn doped NaNbO3 are investigated employing the first principle method based on the density functional theory. The results indicate that the hybridization of Nb 4d and O 2p states play an important role on the piezoelectricity of NaNbO3. The calculated formation energies show that Mn prefers to built into Na sites. Moreover, Mn doping leads...
In this paper, we developed an EM wave absorber having the absorption ability of more than 15 dB for port logistics RFID system by using Amorphous Metal Powder. Firstly, we fabricated EM wave absorber by using Amorphous Metal Powder and CPE(Chlorinated Polyethylene) with different composition ratios 80 ∶ 20 wt.% and 85 ∶ 15 wt.%. Secondly, we designed the optimum EM wave absorber using the calculated...
The Ring effect refers to the filling in of Fraunhofer lines, which is known as solar absorption lines, caused almost entirely by Rotational Raman scattering. The Rotational Raman scattering by N2 and O2 in the atmosphere is the main factor that leads to Ring effect. Basically, the Ring effect is considered as a pseudo-absorption process in retrieval of trace gas constituents in atmosphere. The solar...
Nitrogen dioxide (NO2) plays a key role in the chemistry of the atmosphere. Based on the space borne measurements, the Differential Optical Absorption Spectroscopy (DOAS) method determines the NO2 slant column density (SCD) along the light path through the atmosphere in a given spectral window between 405 and 465 nm. Based on radiative transfer model, a Look-Up-Table (LUT) of Air Mass Factor (AMF)...
Nitrogen dioxide (NO2) plays a very important role among the anthropogenic trace gases. The tropospheric NO2 vertical column density (VCD) maps derived have been used to study many scientific applications, pollution emissions and pollutant distribution. During the 2008 Summer Olympic Games in Beijing, NO2 is one main air pollutant which should be monitored. This paper presents the NO2 inverse algorithm,...
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