8AOKI T. Passive Alleviation of Micro-Pressure Waves from Tunnel Portals[ J ]. Journal of Sound and Vibration, 1999,220 (5) : 921 - 940.
9HYEOK-BIN K, KI-HYEOK J, YU-SHIN K, et al. Nose Shape Op- timization of High-Speed Train for Minimization of Tunnel Sonic Boom [ J]. JSME International Journal: Series C, 2001,44 (3) : 890 - 899.