4Peng yu-hua, Shi lin-kai. Analysis of Performance of PR. S Asphalt Mixture andApplication, 《 Advanced Materials Research》 ( Volumes 284 - 286) ,International Conference on Advanced Engineering Ma- terials and Technology ( AEMT 2011 ), July, 2011.
5Bueolo S, Impey P, Hayes J. I:Client Expectations of virtual Envi- ronments for Urban Design Development. Proc. of International Confer- ence on Information Visualization. America: IEEE Computer Society, 2001. 690 - 694.
6Tang Tieying, Wu Chengdong. Interactive presentation System for Home - used Products on Internet. Proc. of the Fourth International Conference on virtual Reality and Its Application in Industry. Sheny- ang: Schoole of Inf. and Con. Eng. , Shenyang Jianzhu univ, 2004. 786 - 789.
7David S Ebert. Advanced modeling techniques for computer graphics, ACM Computer Surveys, 1996, 28 ( 1 ) :87 - 89.