Time reversal processing(TRP)and matched field processing(MFP)are inner product of field measured data and copy vector,which is different in TRP and MFR generated from ocean itself in TRP,but from ocean model in MFP.

Echo-to-reverberation enhancement capability of time reversal processing in shallow water;

After the underlying physics of time reversal processing (TRP) was analyzed, we performed data simulation based on ocean environmental parameters .

The capability of time reversal processing for echo-to-reverberation enhancement is st- udied using computer simulation under the condition that target is in the middle of the shallow water guide.

The paper mainly introduces a project of adopting plant still in operation reverse blowing disposal in using the upper tower,when the passage of liquid air blocked by impurities such as carbon dioxide in 10 000 m~3/h oxygen plant in Shandong Lunan Fertilizer Plant,and analyses possible problem with operation process,and definitely put forward sloving means and precautionary measure.