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Different performance of various cost setups from 2 to 9. For bound dataset, when cost value is set as 4, F-measure and AUC reach the peak values of 0.3302 and 0.721, respectively (a). For unbound dataset, the F-measure and AUC reach the maximal values of 0.3117 and 0.703 with cost being set as Figure 5(b).
