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Python与数据库综合实践课程作业

《**地区田间棉铃虫数量及其危害(信息)管理平台的设计与实现》

1.背景分析

**棉区棉铃虫一年可以发生3~4代,对棉花产量可构成严重危害的为第一代和第二代。喀什棉区第二代棉铃虫的危害规律和防治指标有所报道,但**第一代棉铃虫对棉花的危害以及第一、二代的复合危害对棉花的影响亦然重要。近几年,喀什地区棉花生产水平提高较快,已制订了多个新的防治指标。当前的棉铃虫害治理存在“农户间联系不够紧密、采样统计数据多、指标多、防治信息传递慢”等问题,认为需要一个信息管理平台对**各棉区的棉铃虫虫害情况进行汇总,进一步及时地将预报预测信息传递给农户,并提供更便利的信息服务。

2.功能分析、设计模块图

fig.1

图1 功能分析、设计模块图

fig.2

图2 实体、属性、联系分析和ER图

fig.3

图3 ER图转换后的关系模式


fig.4

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