When λ2 is small, only one network can be chosen by ProMK, and therefore ProMK achieves a relatively poor result in this case. When λ2 increases to a value larger than 103, more kernels are used to construct the composite network, and the results of ProMK progressively improve and achieve stability when most of the networks are used to construct the composite one. The best setting of r for OMG is r = 1.5; for larger values, the results worsen and they become stable when r ≤ 3. As for LIG, the values C = 1 and C = 5 often give the best results, and LIG's performance sometimes fluctuates sharply for other settings of C.