Table 3 Hyperparameter sensitivity analysis (key metric comparison).

From: Design of a dynamic trust management and defense decision system for shared vehicle data based on blockchain and deep reinforcement learning

Hyperparameter

Candidate values

Average reward

Convergence steps

Detection rate

Discount factor (γ)

0.90

71.2

180

88.5%

0.95

76.8

150

90.1%

0.99

82.8

120

93.8%

Learning rate (α)

0.01

68.3

200

85.2%

0.001

82.8

120

93.8%

0.0001

74.5

170

89.7%