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Table 1 Simulation results for group 1

From: Reliability Assessment for the Solenoid Valve of a High-Speed Train Braking System under Small Sample Size

Parameters

Bayesian estimation

Maximum likelihood estimation

n = 33

 α

−6.21 × 10−4

5.00 × 10−6

 β

6.00 × 10−2

5.77

 λ

3.00 × 10−7

−7.00 × 10−2

 E(t)

8.94 × 102

5.76 × 102

n = 24

 α

−3.97 × 10−4

5.00 × 10−6

 β

5.00 × 10−2

5.46

 λ

2.91 × 10−7

−6.00 × 10−2

 E(t)

7.53 × 102

4.15 × 102

n = 12

 α

−2.28 × 10−4

5.00 × 10−6

 β

3.00 × 10−2

4.95

 λ

8.62 × 10−7

−4.00 × 10−2

 E(t)

3.66 × 102

−3.90 × 102

n = 6

 α

−2.31 × 10−4

5.00 × 10−6

 β

4.50 × 10−2

4.45

 λ

1.97 × 10−6

−2.00 × 10−2

 E(t)

−3.70 × 102

−1.62 × 103