Fig. 3

Parameter analysis. a, b, c: x-axis represents δ, y-axis represents AUC, different colors represent different values of γ. d: when k = 2, γ = 0.1, δ = [0.1,0.9];when k = 3, γ = 0.9, δ = [0.1,0.9]; when k = 4, γ = 0.9, δ = [0.1,0.9]; different colors represent different values of δ