In the following experiments, we set the parameters of the User-MGPC algorithm as ω1 = 1, ω2 = 0.7. Based on a similar verification result, we set the parameters of the User-MRDC algorithm as ω1 = 1, ω2 = 0.66, respectively, as well as of the Item-MIOS algorithm with parameters φ1 = 1.3, φ2 = 0.7.