Based on the study of spacecraft formation flying and thrust control,three kinds of orbital configuration for formation flying,natural configuration,enforced configuration and composite configuration,are propounded in detail.

According to the loading characteristic of slab under the design load,RPC lattice slab is recommended,and its design drawing is presented.

After the analysis of track structure type at home and abroad and considering the actual characteristics of Harbin-Qiqihaer Passenger Dedicated Line,the reasonable track structure type was chosen.

Base on the analysis of the characters of rotary fire finishing machine's track mechanism and ordinary adjusting apparatus merits and demerits,the paper suggested that using smooth running helical gear as driving unit and screwing lift meachanism which has compact configuration and smooth running ets.

Specifications on railway track structure for speed-raising of the existing railway line;

The authors hope that this paper can provide a test support for future track structure design.

Research on design of reducing vibration and decreasing noise non-ballast railway track structure;

Secondly, in the case of periodic railway track structure, the general dynamical response in frequency domai.

Based on the analysis to the characteristic of urban mass transit and the ballast & non ballast railway track structure,this paper puts forward that the non ballast railway track structure should be adopted firstly in the urban mass transit,and the design & usage of reducing vibration & decreasing noise railway track structure are proposed and described in detail.