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针对淮河中游防洪调度决策的实例，用最高最低水位经分段折算，作了语义量化；根据方法库模拟结果来判断某种状态的语义可信度，由半正态分布隶属函数来确定；对各种状态的语义可信度间的转换，采用了模糊聚类的方法。文中提出的方法，已试用于淮河中游防洪专家系统。经多次历史洪水的模拟试验，其可行性和实用性得到了验证。
According to the example of flood control scheduling decision in the middle reaches of the Huaihe River, semantic quantification is made by subdividing the maximum and minimum water levels, and the semantic reliability of a state is judged according to the simulation result of the method library, which is determined by the membership function of the semi-normal distribution. The conversion of the semantic credibility of various states adopts the method of fuzzy clustering. The method proposed in this paper has been tested in the middle reaches of Huai River flood control expert system. After many historical flood simulation test, its feasibility and practicability have been verified.