This paper uses the fuzzy system analysis to set up a regional L. R-L. P model, forecast with the parameter of the model and provide an auxiliary method.

本文用模糊系统分析的方法，建立一个地区的L.R— L.P模型，利用模型的参数进行预测，提供一种辅助方法。

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After the analysis of system function and business, this paper designs the database E-R model and logical data model of this system.

在分析了系统业务和功能之后，设计了系统数据库的E - R模型及逻辑数据库模型。

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The system is developed by object-oriented method, and modeled by UML. According to E-R model analysis, the background database is established.

系统采用面向对象的开发方法，用uml建模语言将系统需求模型化，并根据E - R模型分析结果建立后台数据库。

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