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防洪决策是一项十分复杂的决策性思维活动，它不仅需要大量数据型信息的支持，而且还需要大量文档型信息的支持。在分析防洪决策全过程对各种文档信息需求的基础上，广泛收集各种有关文档资料，经过整理分类，确立了防洪知识库的信息组织体系，然后在Ｗｉｎｄｏｗｓ系统下，利用它的联机帮助系统，通过创建帮助文件的方式建立了长江防洪知识库系统。该系统具有用户界面友好直观，操作简便，可为防洪决策者提供方便快捷的文档信息支持
Flood control decision-making is a very complex decision-making thinking activity, it not only requires a lot of data-type information support, but also requires a lot of document-based information support. On the basis of analyzing the information requirements of various documents in the whole process of flood control decision-making, we collect a wide range of related documents and materials, sort out them and establish the information organization system of flood prevention knowledge base. Then, under Windows system, utilize its online help system , By creating a help file to establish the Yangtze flood control knowledge base system. The system has a user-friendly and intuitive interface, easy to operate, flood control policy makers can provide convenient and efficient document information support