According to the research,it is urgent to do some shaking table tests about base-isolation of displacement-limited with fixation.

Points out the existed problems of the fixed limit surging system in implementing systematic control of gas turbine, presents the reasons of the problems and relative solutions,and describes the schedule and its implement of process gas compression surge control system revamp from fixed limit to variable limit in Zhongyuan Dahua Group.

Labour Law takes an indulgent attitude to the term of labour contract with a fixed term, which, unavoidably, not only affects the labourers occupational safety and stability, restricts reasonable floating of the labourers, but also makes the legislation about the labour contract with a fixed term differ from the current practices world.

The labor contracts can be divided into the labor contract of fixed term, the labor contract of unfixed term and the labor contract of term of accomplishment of certain work.