Profile of different scores. The four rows of 3-set graphs correspond to HA, PB2, MP and NS, respectively. The three rows show results with three methods. The first row represents the results using traditional features. The second row represents the results with new features only. The third row shows the results with the combination of traditional features and the new features. The horizontal axis indicates the order number of miRNAs and the vertical axis is the position of binding sites. Here, we reordered the miRNA candidates according to their binding energies.