4Oxlund H,Barckman M,Andreassein T,et al. Reduced concentration of collagen cross links are associated with reduced strenbeth of bone. Bone, 1995; 17:365-371.
5Demongodin I, Koussoulas N T. Differential Petri nets:representing continuous systems in a discrete-event world[J]. IEEE Trans on Automatic Control, 1998, 43(4): 573-579.
6YangCL, YokoyamaA, SekinY. Fault section estimation of power system using color time Petri nets[A]. Proceedings of Expert Systems Application to Power Systems[C], 1993: 321-326.
7Wu J S. A Petri net algorithm for multiple contingencies of distribution system operation[J]. IEEE Trans on Power Systems, 1998, 13(3):1164-1171.
8Jensen K. Colored Petri nets and the invariant method[J]. Theoretical Computer Sciences, 1981, 14(3): 317-336.
10KITTIPHATTANABAWON P. BENJAKUL S, VISESSANEVAN W, et al. Characterization of acid-soluble collagen from skin and bone of bigeye snapper (Priacanthus tagenus)[J]. Food Chemistry, 2004, 89: 363-372.
