The Porfibus-DP net s topologic architecture of public drainage control system of a hydropower station is described to bring its communication principle and connecting mode to light, and the remote control of public drainage control system could be carried out by PLC and Profibus-DP net is suggested, the functions and advantages of this technology are also explained.

This paper, based on the actual project, offers a top structure of the public drainage control system of power station and on-the-spot general line, and reveals a Profibus-DP communication principle and connecting ways.

This paper introduces the components of the PLC-based underground drainage monitoring system, expounds the principles of the system implementation, and discusses emphatically on the functions of the system's software and hardware and some methods for implementing these functions.

The effects of methylcyclopentadienyl manganese tricarbonyl(MMT) fuel additive on emission and emission control system of vehicles have ever been the focus of dispute.

This paper introduces the trouble diagnosis and the inspection and repair methods of the computer controlled emission control systems used for 2001 Mitsubishi Pajero SUV, such as the fuel evaporative emission control(EVAP), exhaust gas recirculation(EGR) and close loop air/fuel ratio control.

This paper introduces water filled intermittent removal ash hopper and removal ash control system, indicates problems and give the measures of resolving these problems.