9S.Forrest,A.S.Perelson,L.AIlen,R.and Cherukuri.Self-Nonself Discrimination in a Computer[C].In Proceedings of the 1994 IEEE Symposium on Research in Security and Privacy,Los Alamitos,CA:IEEE Computer Society r Press,1994.
10M N O Sadiku. Artificial Intelligence [ J ]. IEEE Potentials, 1989, 8(2) :35 - 39.