| There are many methods in the course of studying software engineering. In these methods, Structured Method and Object-Oriented Method are most famous and they are used broadly. Object-Oriented idea is very fit to construct complex software system, Object-Oriented software development approach is an effective approach for large-scale complex systems. UML ( Unified Modeling Language ) is one of the latest achievements in software engineering field. It can be used in specifying, visualizing and constructing the software systems. The Unified Modeling Language fuses the concepts of Booch, OMT and OOSE. It concentrates first on a common metamodel ( which unifies semantics ) and second on a common notation ( which provides a human rendering of these semantics ). UML is a common modeling language, it applys to all kinds of software development methods, every stage of software life cycle, all fields and many tools. So we can control system complexity efficiently, the system has changeability, flexibility, low venture and it can be reused again. Thus the development efficiency can be improved greatly.The thesis models the data transmission system in aviation data links based on the study of Unified Modeling Language, a visual simulate system is specified in the end. First the thesis introduces the definition, analyses the characteristics and applications. Second, it provides the characteristics of modeling process and specifies the process of data transmission system. Last, the part-model of the system is presented. |
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