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UML, an important tool of OOA, is a standard modeling language which has been widely used by public. It not only can provide a graphic modeling language way to design software, but also be used in the whole system developing lifecycle. Via UML modeling promises higher software development efficiency, better software quality, and less maintence expenses. Under the background of development desulfurization and denitrification system. This paper aims at the research of UML modeling and the combination of PLC and UML technology together. The combination of UML modeling language not only improve the efficiently of system development, but also is beneficial to the development and maintenance of system later.

Ozone Desulfurization And Denitrification System Modeling Based On UML