6严铭卿等.天然气数配技术[M].北京:化学工业出版社,2005:227～228 YAN Ming-qing,MI Kang-qi,LI Guang-hua,et al.The transport and distribution technology for natural gas[M].Beijing:Chemical Industry Press,2005:227～228
7U.I.Gupta,D.T.Lee and J.Y.T.Leung.An optimal solution for the channel-assignment problem[J].IEEE Transactions computers,1979,C-28:807-810
8R.Kennedy,B.Kirwan.Development of a Hazard and Operability-based method for identifying safety management vulnerabilities in high risk systems[J].Safety Science 30 (1998) 249～274.
