Computer simulation can be done with computer repeatedly and is characteristicof money saving, none risk and repeatability Therefore, it is an effective and efficienttool for high-speed railway study Using simulation method, the thesis makes researchinto high-speed and medium-speed trains cooperation on the same line, under thebackground of Beijing-Shanghai high-speed railway.

Following the operation of Line 4,a joint operation on the shared ring rail is adopted on Line 3 and Line 4,features with simple track layout,9 joint stations,shorter headway and higher passenger volume,which has no precedent to go by even in the world.

Shanghai rail transit system adopts the transportation plan of Line 4 loop transportation by applying the joint operation of Line 3 and Line 4.

With a comprehensive definition of the joint operation in metropolitan rail tran sit,this paper makes a brief introduction about the operation mode in foreign ci ties.

Experimental study on in-service welding of running pipelines;

The study of monitoring and measuring the operating axes of the rotary kiln;

Study of monitoring and analyzing system for operating axes of largescale rotary kiln with multisupporting;

The principles and method for dynamically measuring operating axes of rotary kiln were introduced in this paper.