7Charlotte E. Whitfield NASA's quiet aircraft technology project[C]. 7th Japan International SAMPE Symposium and Exhibition (JISSE-7),Tokyo: Nov 13th- 16th, 2001.
8Delphine D' hoop. Wings of Silence[J].Research-EU, 2008-01. http://ec.europa.eu/research/research- eu/55/article_5524_en.html.
9Degang Cui. Optimization in Aviation [C]. Industry Application China- Germany Conference on Mathematics and Industry (CGCMI), Beijing: March 15,2010.
10Stijn Donders, Roberto d' Ippolito, Herman Van der Auweraer. Uncertainty- based design in automotive and aerospace engineering[C]. SAE World Congress & Exhibition, Detroit MI USA:Jan. 1,2007.