With regard to the important part of extruded direction played in feature extraction of an extruded surface in reverse engineering, a method on extracting the extruded direction of extruded surface is presented.

According to the vertical geometrical relationship between the normal of extruded surface and the extruded direction at each point,a method is presented which can extract the extruded direction of extruded surface with RANSAC(random sampling consensus) algorithm combined with least-squares.

Based on the existing geometric model of infrared images of ships to realize the geometric model of ships characterized as parts of thick hull by means of facet expanding, the physical model for the unstable state heat transfer of the ship with bulk structure has been obtained.

Effect of the addition level of plasticizer DOP on the tensile profile of PNBR/PVC blend based on fractal theory;

Based on requirements of the national standards,principle and structure of dough extensigraph,the factors affecting dough extensigraph performances were analyzed,some ways to improve its test performances were put forward.