This article takes screening control as an example, introduces the pressure screen plugging’s treatment program from improvement of control scheme, when pressure screen is showing plugging tendency, the control system executes pre-treatment.

The improved scheme mainly aims at improving the ratio control of DCS,screen plugging pretreatment,screen plugging treatment,reject control,slag sequence control and so on,the screen plugging problem is overcome effectively and it ensures the pressure screen to work efficiently and smoothly.

polymethyl acrylate sodium,acrylic acid, etc, are employed in polymerization process to prevent screenprinting adhesives from forming membranes, and consequently, to avoid theclogging of screens.

The in- troduce about how to implement every modul fuction is emphasised,and the key technic of how to re- solve the problem about network jam is also introduced in detail.

Sensitivity Analysis on the Minimum Saturated Flow of Blocking Networks;

The article expounds the basic professional skill training work of anti - kidnapping from five aspects of police equipment, commanding system and intercepting network, criminal information, riot squad, work- ing out and preview of the program.