| Virtual experiment establishes virtual experimental environment in computer system, which uses the technology of the multimedia, simulations, virtual reality and so on. The experimenters can complete various experimental projects that like in a real environment, and the experimental results equivalent to or even better than the result obtained from the real environment.Virtual experiment device is the basic unit of virtual experiment, which has crucial meaning for the effect of experimental operation. Therefore to realize efficient network virtual experiment teaching, a reasonable structure, design specification, powerful component modeling system is very necessary.This paper based on the sufficient research, proposed the system requirements analysis, used the ways of object oriented software engineering analysis and designed virtual experimental component modeling system.First, this paper introduced the development background of the virtual experimental component modeling system and the research situation about the virtual experimental component modeling methods home and abroad, as well as the main problems needed to be solved.Secondly, thoroughly analyzed the overall demands of the virtual experimental component modeling system, combined with practical applications, and according to the system demand analysis, we summarized the system data information as the basic information, representation of visual, functional and multi—state information. In addition, it can also divided the overall function of the system, determined implementation situation of virtual experiment component modeling system and gave use case description for the functional models in the system.Then, we determine that the system uses the QT framework of the overall design and development, which according to the master of the virtual laboratory component modeling system function and referencing standard SVG standard design component text format. We described the function of the system frame design, and divided the system into graphic design module, property management module, interface management module, multi—state management module and network platform. We study the implementation process and implementation method of each module, and describe the process with UML diagram.Finally, we analyzed and discussed some key problems of the system implementation process for each module, and display the diagram of the system results and give out part of the used code to ensure that the system realizes the truth. |
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