Advanced Materials Research Vol. 159

Abstract: This paper addresses several key issues in the design of the mapping tool used for the FPGA application implementation in our SRAM-based FPGAs fabricated in a 0.5 micron SOI-CMOS process, with particular emphasis on FPGA architecture interrelated mapping step and packing method for CAD tool. Considering the routability and testability of the FPGA and the CAD tool, the algorithm combines the FPGA structure with the object netlist, mapping the basic elements into basic building blocks in order to reduce the resource usage. The result is proven in extensive test circuits used in our FPGA design.

Abstract: According to indoor wireless environment and signal propagation model, an indoor location algorithm based on grid characteristics match by TDOA-RSSI combining is put forward in this paper, in which the RSSI and TDOA parameters are combined as grid characteristic parameters to calculate the weighted Euclidean distance. The location algorithm adopts KWNN algorithms for grid matching and location estimate. Simulation results show that this algorithm has better robustness and accuracy, and can effectively solve the problem of location estimates stability in general RSSI fingerprint location system.

Abstract: At present, several feature meta-models have been come up with to create domain model. However, they can’t meet the requirements of dynamic Internet environment or software reuse. This paper proposes a feature meta-model based on ontology. In particular, it can adapt to various types of changes in the dynamic environment and can make design and implementation more convenient than traditional methods. Finally, we give out an example of personnel archive management system to verify this model.

Abstract: In this paper, a personnel archive management system based on three-layer architecture was proposed, in which a middle ware was refered. In addition, relative knowledge about middle ware was introduced and the advantages of this architecture were listed out. Finally, prospect of this architecture was given out.

Abstract: The theory and method of matrix computation, as an important tool, have much important applications such as in computational mathematics, physics, image processing and recognition, missile system design, rotor bearing system, nonlinear kinetics, economics and biology etc. In this paper, Motivated by the references, especially [2], we give the estimates for the lower bounds on the inverse elements of strictly diagonally dominant tridiagonal period matrices.

Abstract: Adding element tridiagonal periodic matrices have an important effect for the algorithms of solving linear systems，computing the inverses, the triangular factorization，the boundary value problems by finite difference methods, interpolation by cubic splines, three-term difference equations and so on. In this paper, we give a fast algorithm for the Inverse Matrices of periodic adding element tridiagonal matrices.

Abstract: The theory and method of matrix computation, as an important tool, have much important applications such as in computational mathematics, physics, image processing and recognition, missile system design, rotor bearing system, nonlinear kinetics, economics and biology etc. In this paper, Motivated by the references, especially [2], we give the estimates for the lower bounds on the inverse elements of strictly diagonally dominant tridiagonal period matrices.

Abstract: In this paper, method of building domain knowledge base is proposed through the comparison of ontology and other tools for knowledge expression. In addition, we lay out a model to describe the procedure vividly. Facts show that ontology is the best way to build domain knowledge.

Abstract: This paper proposes a novel algorithm for the automatic generation of pencil drawing from digital image. We use multi-scale edge detector to construct an outline map according to the structural importance. Using strokes as the major building blocks, we smooth the boundary and rendering outline according to the pencil sketch style. Then, tone rendering is carried out to convey both the tone and textures of the original image. Experimental results on natural scenery and architectural scenery images show that the pencil sketch drawings produced by our method are of good visual effects. Besides, the implementation require less than 1 second on the image with 400*300 pixels.

Abstract: In the field of virtual reality, tree modeling and rendering technique is a hotspot. This paper summarizes the current basic methods of tree modeling and rendering. At first, we present basic principles of making tree models, then show the two methods of tree modeling and rendering used in game scenes in virtual reality. One is the tree modeling technique based on 3Dmax, the other is the tree rendering technique based on OpenGL. At last we give the application examples of these two methods and compare the two methods in navigation system project.