A New Approach to the Degradation Stage Prediction of Rolling Bearings Using Hierarchical Grey Entropy and a Grey Bootstrap Markov Chain.

From Figure 13 , it can be seen that when N = 200 and N = 400, the degraded feature sequences based on HSE and HFE do not exhibit obvious regularity; when N = 800 and N = 1000, the degraded feature sequences based on HSE and HFE show a decreasing trend only when t > 4000 min.

also in 47,180 other papers