Developing process of stoping and filling from overhand level cut and fill stoping,two stoping primary filling to quick filling uninter pillar continuos stoping in Fenghuangshan Copper Mine are reviewed.

Numerical analysis of the mixture formation in stratified charged natural gas engine;

The experiments studied the effects of lean combustion and exhaust gas recirculation (EGR) with charge stratification on the exhaust and engine performance.

Experimental study on electrodeionization module with layer bed filling form;