Abstract:In the view of the influence of different unstructured mesh types on the fluid calculation efficien-cy and convergence on premise of the same surface mesh size and body mesh unit number,the computa-tional efficiency and convergence of tetrahedral mesh,hexahedral mesh and polyhedral mesh in CFD calcu-lation are compared.T he result show s that under the conditions of same surface mesh size,the conver-gence of hexahedral mesh is better than that of the others.Besides,the time and RAM for calculation of hexahedral mesh are less than that of the others.The convergence rate of polyhedral mesh is much better, but the computational efficiency of polyhedral mesh is a little lower than that of tetrahedral mesh.The computational efficiency and convergence of tetrahedral mesh is worse than that of the others.Under the conditions of body mesh unit number,the convergence precision of hexahedral mesh is better.The compu-tational stability of tetrahedral mesh is better.For the convergence rate,polyhedral mesh is as well as tet-rahedral mesh.Besides,the convergence precision and the computational stability of polyhedral mesh is much better.So the application range of polyhedral mesh is superior to the others in comprehensive com-parison.

Abstract:Multiple sensor registration is important link in multisensordata fusion. In this paper, the source of registration errors and principle of registration techniques are briefly introduced firstly. Then, a review of the available techniques for multisensor registration is given. Finally, the combined technique of computational intelligence、 knowledge base and neural networks is proposed to solve the problem of registration.

Abstract:Contraposing complexity of quantificating and difficulty ofconsistency of comparison matrix in AHP, the paper adopts FAHP and provides a new method of determining ratio of factors combined with the project of material provision optimizing path.

Abstract:It's necessary to check the flying technics of the pilotin the general flying training,so a system by which flying score could be assessed and managed automatically is discussed.It's development is done according to the flying data that are recorded by the airborne apparatus and the experience of judging manually.Lots of the flying data examinations show:this system can manage the flying score and the information concerned automatically,assess the flying score quickly and exactly,its assessing time is one twelfths of the manual time,and it can also meet the requirement of the error precision completely.