Figure 3. The number of driver nodes and size of SCC for SF networks with different average degrees and power-law exponents when the highest load edge is removed.

(a) the number of driver nodes at different stages of cascading failure with average degree ; (b) ; (c) the amount of edges in SCC at different stages of cascading failure with average degree ; (d) . The networks size and tolerant parameter . The squares, circles, triangles, lower triangles and left triangles symbol the controllability of SF networks with the respectively.