[1] [1] N. F. Yang, "Coordination laws and parameters description of human motion," Ph.D. thesis, Tsinghua Univ, Beijing (2001).

[2] [2] J. H. Park, "Fuzzy logic zero moment point trajectory generation for reduced trunk motions of biped robot," Fuzzy Sets Syst. 134(1), 189-203 (2003).

[3] [3] T. Bajd, U. Stanic, M. Kljajic, A. Trnkoczy, "Online electrogoniometric gait analysis," Comp. Biomed. Res. 9(5), 439-444 (1976).

[4] [4] E. Y. Chao, "Justification of triaxial goniometer for the measurement of joint rotation," J. Biomech. 13(12), 989-1006 (1980).

[5] [5] L. S. Chou, K. R. Kaufman, R. H. Brey, "Motion of the whole body’s center of mass when stepping over obstacles of different heights," Gait Posture 13(1), 17-26 (2001).

[6] [6] C. Frigo, R. Carabalona, M. D. Mura, S. Negrini, "The upper body seg-mentalmovements during walking by young females," Clin. Biomech. 18(5), 419-425 (2003).

[7] [7] Y. Ogura, S. Ando, H. Lim, A. Takanishi, "Sensorybased walking motion instruction for biped humanoid robot," Robot. Autonom. Syst. 48(4), 223-230 (2004).

[8] [8] Y. Lee, J. Kim, M. Son, M. Lee, "Implementation of accelerometer sensor module and fall detection monitoring system based on wireless sensor network," 2007 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, pp. 2315-2318 (2007).

[9] [9] H. Wang,M. Han, J. Liu, "Mobile phone platform for wireless monitoring of human dynamic plantar pressure," Chin. J.Med. Instrum. 34(6), 403-407 (2010).