We suggest the use of a model DET expansion tank, the Watts Governor 80 ball cock with integral thermal expansion relief valve, or a 530C calibrated pressure relief valve.
A one-class classification method called support vector data description (SVDD) is studied, and an intelligent early warning method based on DET and SVDD is also proposed.
A discrete event topologic diagram model was derived according to the characteristics of the single-track railway diagram, and an iterative repair method was developed on the basis of the DET model.