An Adaptive Maintenance Model Oriented to Process Environment of the Manufacturing Systems

Table 1

Monitoring data of the booster expansion turbine.

Contents	Status
	1	2	3	4
Outlet temperature (°C)	−157.7	−161.7	−165.7	−167.7
Oxygen content in oxygen (%)	0.99953	0.99944	0.99933	0.99927
Nitrogen content in nitrogen (%)	0.9998634	0.9998636	0.9998638	0.9998639
The ratio of oxygen extraction (%)	0.6731	0.6840	0.6951	0.7007