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Event-B is a formal modeling language based on set theory and predicate logic, within which hierarchical models can be established by refinement strategy. A method for applying Event-B to practical industry is proposed, which consists of rewriting requirement, establishing abstract model, and step-by-step refining. Firstly, requirements are rewritten from three different views&: environmental view, functional view, and property view. During this phase? refinement strategy reflecting model hierarchy is identified. Secondly, formal methods are adopted to establish abstract model and validate the established model. Using well-proved abstract model, requirement appending, model refining and model validating are carried out at the following levels of the model hierarchy according to the refinement strategy. Finally, based on the whole established models corresponding to requirements, implementation codes can be automatically generated by the related tools. With refinement theory adopted in this method, requirements and properties of system under development can be identified in a refinement way and incrementally. Modeling and verification using formal methods guarantees the correctness of models. To illustrate the feasibility of the method, the development of multi-application smart cards ss shown as a case study. Appilcation example of the proposed method in pratcal modeiing and vaiidaion is given based on Event-B and Rodin platform. [ABSTRACT FROM AUTHOR]

The numerical simulation of the large scale science and engineering problem in the aerospace area relies on the support of High-Performance Parallel Computing(HPPC)and is the engine of the development of HPPC. The paper gives a survey of recent progress of HPPC in the aerospace area and a brief introducion of the HPPC environment. The relative research areas of HPPC of aerospace, including aerodynamic, aerothermal, chemical non-equilibrium, structure, heat protecion, Monte Carlo method and turbulence et al., are classified and described in detail. The dilemma of high parallel efficiency in scientitic computing and low use in engineering compuing, and the diversity of paralel applications and the lack of scientific paralel methods are concluded. Finally, the prospects of the future HPPC development in aerospace area are presented. [ABSTRACT FROM AUTHOR]