9[7]Dongilshin,En Sup Yoon,Sang Jin Park,et al.Web-based interactive virtual laboratory system for unit operations and process systems engineering education[J].Computers and Chemical Engineering,2000,24:1381-1385.
10[8]Mann S.and R.W.Picard Virtual bellows:constricting nigh quality stills from video[C].Proceedings of the First IEEE International Conference On Image Processing,1994,11.
