Because of the disturbance of some regular waves, the deformity of reflective wave occurs, making the coherence inversion method unreliable. By using the event
The problem of fault information process in telephone networks management system in AT & T in the US has been solved with step-wise learning approach.This metho
Coal mining with ploughs is an ideal coal mining technology for thin a nd thinner coal seams. The existence conditions of coal seams are different for each othe