<正> There is tremendous growth in the use of Geographic Information Systems(GIS), Global Positioning Systems (GPS), Remote Sensing, Satellite Communication, an
<正> According to the research results of motion parameters of coal-gas flow,analyzedthe formation mechanism of shock waves at different states of coal-gas flow
<正> Through theoretical analysis, simulation test and practice, the law of a fracture'sinfluence on hard top coal press cracking was studied. The study foc
<正>Using GIS, GPS, GPRS and RFID, a dynamic information management system of digital mining in an open pit was designed and developed.A linear programming mode