Anesthesia was maintained with Propofol by TCI (target-controlled infusion),the effect-site concentration was set at 1,2,3 and 4 μg/mL respectively and TEOAE signals was monitored and recorded response amplitude,wave reproducibility,Band (1,1.

The effects of oscillation frequency of mechanical oscillation and ultrasonic radiation on the performance of gas-liquid mass transfer in oscillatory reactor were investigated by the method of absorption of carbon dioxide into aqueous sodium hydroxide,respectively.