[7] Huang N E, Shen Z, Long S R, et al. Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 1998, 454(1971): 903.
[9] Zhang Y, Sun J W, Rolfe P. Journal of Modern Optics, 2010, 57(21): 2159.
[11] Wang H, Li G, Zhao Z, et al. Transactions of the Institute of Measurement and Control, 2013, 35(1): 16.