Influence of Wheelset-class-lathing on Vehicle Stability;

With an analysis of the dynamic performance of the worn profile wheel tread,and the investigation data gained from the vehicle overhaul, this paper discusses the adoption of the wheelset class-lathing method based on the statistics of whileset wearing,holds that this method has reasonable technical parameters,and therefore,is feasible for both economic and technical purposes.

This paper discusses the wheelset lathing cutting output from the secure and economic point of views,proposes some suggestion to improve the economic efficiency of cutting based on the security of train operation.

There exists close relation between maintenance cost and maintenance level of aircraft engine.

An aero-engine is a typically repairable and complex system and its maintenance level has a close relationship with the maintenance cost.

Maintenance Level Decision of Civil Aviation Engine Based on Comntropy Attribute Reduction;

Aimed at the problems existed in the battlefield damage assessment and repair(BDAR) of radar equipments,and combined with the constructing and distributing characteristics of radar troops,the BDAR level is defined.