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. 2017 Jul 12;11:362. doi: 10.3389/fnhum.2017.00362

Figure 2.

Figure 2

Optimized framework of kernel combination: kernel matrices were calculated separately on each optimized feature set, and were then linearly combined as a final kernel. Cross-validation parts are in blue font and dashed lines. To distinguish it from the other two frameworks, the kernel combination part is illustrated in red.