The effect of Nb doping on the oxygen permeation and stability of SrCo_(0.8)Fe_(0.2)O_(3-δ)(SCFO) was investigated comp......

纳米材料是当前研究的热点，SrCO3与SrTiO3由于其优良性能而备受关注。本论文根据低热固相化学反应原理首次以SrCl2·6H2O和（NH4）2CO3......

In this paper, a new single-resistance controlled sinusoidal oscillator (SRCO) using single universal voltage conveyor (......