It is required that the film in a aerial camera with long focus,wide frame and high resolution should be flattened on film board quickly and precisely during exposure time.

Computer is an Applied Research and Realization in the Supervising System of TV s Logo;

Motion Control Analysis for a Wafer Stage Based on Multibody Modeling;

Motion control system of an ultra precision wafer stage with application to integrated circuit production was presented.

A nmlevel trackerr precision is required while scanning and exposing the wafer stage of 0.

In this article, authors analyze the interaction between the shield machine and duct pieces, study the dislocation of duct pieces and concrete crack problems caused by in-coordination between the attitude of shield machine and the trend of lining structure, and provide some advice.