80 , 4669 (1998). [16] J. Zhao, J. Lu, and Q. Zhang, IEEE, Trans. Circuits Sys. 56 , 514 (2009). [17] R. Albert and A.-L. Barab´asi, Rev. Mod. Phys. 74 , 47 (2002). [18] A. Arenas, A. Diaz-Guilera, J. Kurths, Y. Moreno, and C. Zhou, Phys. Rep. 469 , 93 (2008). [19] M. Zhan, J. Gao, Y. Wu, and J.H. Xiao, Phys. Rev. E 76 , 036203 (2007). [20] L.M. Pecora and T.L. Carroll, Phys. Rev. Lett. 80 , 2109 (1998). [21] G. Hu, J.Z. Yang, and W. Liu, Phys. Rev. E 58 , 4440 (1998). [22] L. Huang, Q. Chen, Y.-C. Lai, and L.M. Pecora, Phys. Rev. E 80 , 036204 (2009). [23] S.N. Dorogovtsev and J.F.F. Mendes. Adv. Phys. 51 , 1079 (2002). [24] F. M. Atay, T. Biyikoglu, and J. Jost, Physica D 224 ,35 (2006). [26] http://moat.nlanr.net/AS/Data/ASconnlist.20000102.946809601 [25] ftp://ftp.santafe.edu/pub/duncan/power unweighted [27] F. Sivrikaya and B. Yener, IEEE Network 18 , 45 (2004). [28] L. Wang and Y.-X. Sun, J. Stat. Mech. 11 , 11005 (2009). [15] Y. Zou and G. Chen, Europhys. Lett. 84 , 58005 (2008). [14] F. Sorrentino, CHAOS 17 , 033101 (2007). [13] T. Chen, X. Liu, and W. Lu, IEEE, Trans. Circuits Sys. 54 , 1317 (2007). [12] X. Li, X.F. Wang, and G. Chen, IEEE, Trans. Circuits Syst. 51 , 2074 (2004). [11] X.F. Wang and G. Chen, Physica A 310 , 521 (2002). [10] G. Hu, J.H. Xiao, J.Z. Yang, F.G. Xie, and Z. Qu, Phys. Rev. E 56 , 2738 (1997). [9] G. Tang and G. Hu, Phys. Rev. E 73 , 056307 (2006). [8] S. Guan, G.W. Wei, and C.-H. Lai, Phys. Rev. E 69 , 066214 (2004). [7] J.H. Xiao, G. Hu, J.Z. Yang, and J.H. Gao, Phys. Rev. Lett. 81 , 5552 (1998). [6] R.O. Grigoriev, M.C. Cross, and H.G. Schuster, Phys. Rev. Lett. 79 , 2795 (1997). [5] M. D. Shrimali, Chaos 19 , 033105 (2009). [4] G.N. Tang, K.F. He, and G. Hu, Phys. Rev. E 73 , 056303 (2006). 5