In the unmanned aerial vehicle (UAV)-enabled wireless power transfer (WPT) system, due to the poor precision of the landing system, the coupling coefficient of the charging coil is affected, which ...reduces the charging efficiency. In order to improve the stability and charging efficiency of the UAV-enabled WPT system, a charging coil is proposed in this paper. Firstly, On the basis of theoretical analysis, the structure of the charging coil is designed according to the limitation of the size and weight of the charging coil and the working characteristics of the UAV. And then, the parameters of the charging coil are optimized so that it is tolerant to misalignment condition. Finally, the results of simulation and experiment show that when the offset distance is less than 200mm, the coupling coefficient of the charging coil can be kept at about 0.2, and the power transmission efficiency can be kept at about 91%. The reliability of the UAV-enabled WPT system is improved.
To explore the influence of recombinant human growth hormone (rhGH) on the apoptosis and intestinal mucosal structure in severely scalded rats.
Thirty male Wistar rats were randomly divided into ...three groups, i.e. control, scalding and rhGH groups. The rats in scalding and rhGH groups were inflicted with 25% TBSA III degree scalding on the back and immediately followed by intraperitoneal injection of dexamethasone (80 mg/kg). The scalded rats were administered with normal saline and rhGH (1.33 IU.kg(-1).d(-1)) since 2 postburn hours (PBHs), respectively in the last two groups. The changes of the apoptosis rate, the intestinal mucosal proliferative index (PI) and epithelial ultrastructure and the intestinal mucosal pathomorphology of the distal end of ileal mucosal tissue were observed on 30 and 96 PBHs.
The intestinal mucosa morphology and epithelia in scalding group were severely injured but were significantly ameliorated by rhGH to near those in control group. The PI in rhGH and scalding groups at 30 PBHs w
