【摘要】 从软件工程的角度出发,在传统三层软件体系结构的基础上,提出了一种四层软件体系结构模型。同时通过两种结构的对比,分析了三层软件体系结构的缺陷和不足,阐述了四层软件体系结构的优势。并在四层软件体系结构的基础上开发构建了一个铁路电务供电监控系统。该系统具有实时性强、可重用、易扩展等优点,已经投入使用,并使用效果良好。更多还原

【Abstract】 One structural model of a kind of four-layer software system is proposed from the angle of the software engineering base on the three-layer software system.Through the contrast of two kinds of structure at the same time,defect and deficiency of the system structure of software of three-layers is analyzed,the advantage of the system structure of software of four-layers is explained.A railway electricity supply power monitoring system is constructed on this basis.This system has strong,reusable,apt advantage of expanding etc of real-time character,has already come into operation,and the effect of using is good.更多还原