9MA Zhengping, CUI Deguang, CHENG Peng. Air traffic control command monitoring system based on information integration [A]. The 5th USA/Europe Air Traffic Management R&D Seminar [C]. Budapest, Hungary, 2003.Available at http: //www. eurocontrol. fr/ atmsem/index. htm.
10Roger B, Lee Berry, James R. Preliminary evaluation of flight delay propagation through an airline schedule [A]. The 2rd USA/Europe Air Traffic Management R&D Seminar[C]. Orlando, USA, 2000. Available at http: //www. Eurocontrol. Fr/atmsem/index. Htm.