Research on the angular glint of targets in the near-zone

Abstract

This paper presents a method to analyze and calculate the angular glint of targets. By parting the target to very small size cells, using high-frequency approximation, the near-field radar cross section (RCS) is calculated based on the scattering from complex targets and environments (SCTE) system, and the angular glint is calculated by the phase grads. The results show that the angular glint can be calculated exactly in the SCTE system, and this method is correct and efficient. In the near-zone, the far-field theory is not applicable and the angular glint should be calculated by the near-field theory.

New scientific evidence of the materials and craft of Hard yellow paper in Tang Dynasty collected by Gansu Provincial Museum

“…4 of the ber dyeing analysis of 10413, it could be seen that there are a lot of purple amorphous substances and transparent yellow colloids around the bers after dyeing. According to the rule which was that amylopectin would appear purple and amylose appearing blue when they encounter iodine [22,23], it was speculated that starch existing in paper sample.…”

“…The absorption peaks in the range of 1427 ~ 1318cm − 1 were generated by variable Angle vibration of CH 3 , CH 2 and CH. In the infrared spectrum, there were characteristic absorption regions of polysaccharides ranging from 1157 to 1033cm − 1 , in which multiple acromial peaks were generated by C-O-C and C-OH stretching vibrations in polysaccharides, indicating the presence of polysaccharides on the surface coating of the sample[22,23]. As shown in Fig.ofthe ber dyeing analysis of 13079 (Fig.3), a large number of transparent yellow colloidal substances were clustered around the bers.…”

Calculation of angular glint in near field utilizing graphical electromagnetic computing

“…In the near field [17,18], the incident electric field can not be regarded as a plane wave. The incident electric field on the surface of the target can be considered as a spherical wave:…”

A New and Sensitive Hydride Generation-Nanosilver Resonance Rayleigh Scattering Spectral Method for Trace Se (IV)

“…HG-spectrophotometry is simple and low-cost. The common absorption liquid have silver diethyldithiocarbamate [6,16], AgNO 3 [17] and HAuCl 4 [18][19]. The silver diethyldithiocarbamate absorption liquid needs to use pyridine or chloroform as solvent, the reagent are toxic.…”