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对现行近似推理方法的特点及局限性进行分析,进而提出了向量法近似推理模型。将推理视为论域的多维状态空间中状态的变化与传递。本方法吸取了MYCIN系统的CF可信度方法的直观、简单的优点;发挥了阈值逻辑方法的权值在表达和保持相关因素不同重要性方面的作用;用向量投影的方法,计算状态与规则的匹配程度。该模型为专家系统设计提供的推理方法,概念合理,使用直观、简便,能较准确地反映客观过程。
The characteristics and limitations of the current approximate reasoning method are analyzed, and then the approximate reasoning model of vector method is proposed. The reasoning is regarded as the change and transfer of states in the multidimensional state space of discourse. This method draws on the intuitive and simple advantages of MYCIN’s CF credibility method; plays the role of the threshold logic method’s weight in expressing and maintaining the different importance of related factors; uses vector projection method to calculate the states and rules The degree of match. The model is an inferential method provided by the expert system design. The concept is reasonable, intuitive and easy to use, and can accurately reflect the objective process.