摘要：A new fabrication technology for three-dimensionally buried silica on silicon optical waveguide based on deep etching and thermal oxidation is presented. Using this method, a silicon layer is left at the side of waveguide. The stress distribution and effective refractive index are calculated by using finite element method and finite different beam propagation method, respectively. The results indicate that the stress of silica on silicon optical waveguide fabricated by this method can be matched in parallel and vertical directions and stress birefringence can be effectively reduced due to the side-silicon layer.

摘要：Induction heating of steel in continuous casting/rolling process is an important means to reduce energy consumption, decrease cost and improve efficiency, thus becoming an attractive research direction. A mathematical model with finite difference method （FDM） was developed to describe the electromagnetic field and predict the temperature distribution in the steel slab for the whole induction heating process. To validate feasibility of the model, computational results were compared with the ANSYS simulation results. According to the comparing results, the temperature distributions of the slab cast under different technical parameters were investigated, which may provide useful information to optimize the parameters of technology in heating process.

摘要：The paper introduces a method for displaying cubic volume cells (voxels) resulting frompartitioning given objectS with orthogonal planes for finite difference calculation. The method representS ablock of voxels as a B-rep solid model and conStrUcts the B-rep geometric clementS with an approach frombottom to up. Once the B-rep model is established, it is efficient in displaying because inner voxels areomitted and many coplanar facetS are merged together. By displaying the interSeCtion lines of theconstructed B-reP model and the partitioning planes, the tessellation image can be generated.