2Bravo-Aranda G, Hernandez-Rodriguez F. Knowledge-based system development for assisting structural design.Advances in Engineering Software, 1999, 30(11):763-774.
3Sehyun Myung, Soonhung Han. Knowledge-based parametric design of mechanical products based on configuration design method. Expert System with Applications, 2001, 21(8): 99-107.
4KONDO K Pigmod.Parametric and Interactive Geometric Modeler for Mechanical Design[J]. Computer Aided Design, 1990,22(10):633 - 644.
5BIDARRA R, BRONSVOORT W F. Semantic Feature Modelling[J]. Computer Aided Design, 2000, 32(4):201-225.
6ASHOK V Kumar, YU Lichao. Sequential Constraint Imposition for Dimension- driven Solid Models[J]. Computer Aided Design,2001, 33(6):475-486.
3Opoien Hanskristian, Valbo Anneiil, Grinde Anette, et al. Post cesarean surgical site infections according to CDC standards: rates and risk factors. A prospective cohort study [ J] . Acta Obstet Gynecol Scand, 2007, 86 (9): 1097.
