Combining with the construction practice of oxidation ditch in Zhenjiashan Sewage Treatment Plant in Zhongshan City,this paper discusses how to do a good job of mass concrete construction and related process control in the oxidation ditch and control measures of impermeable leak-proof in the construction of sewage treatment pond.

The schemes for the safety protection system of passenger train operation are studied and designed after the implementation of speed increase and opening to traffic of the electro-motive unit ( EMU) on Guangzhou-Shenzhen railway on the basis of the author' s working experiences in combination with the characteristics of EMU and the advanced control technology for the high-speed train abroad.

In the developing process of the protection system,the system’s visual simulation was realized for directly reflecting the influence produced by the optimize parameters to the system intercepting effect.