基于双参数方法的诊断规则不确定性问题研究

提出规则蕴含的因果关系、充分性和必要性等不确定性规则的相关概念以及需要解决的规则不确定性问题，在此基础上介绍基于双参数的不确定性诊断规则的表示形式，进一步说明了规则条件参数计算方法和规则不确定参数的获取方法。与已有重要的不确定性知识的数值处理方法进行比较表明，该方法能够表示具有复杂不确定性加权关系的诊断规则，并且能够根据规则的约束条件通过数值计算获取规则的不确定性相关参数。实际应用结果表明，基于双参数的不确定性诊断规则表示方法是行之有效的。

A Novel Uncertain Rule Presentation Method Based on Dual Factors

We proposed a novel rule presentation method for uncertain diagnosis rules based on the notions of case and effect relationship, sufficiency, necessity which were contained in rules and uncertainty issues related to diagnosis rules. The relevant issues were also presented and discussed, which included rule presentation form, uncertainty degree calculation method and rule uncertainty factors acquisition method etc. In contrast with other existing significant methods, the rule presentation method mentioned can deal with diagnosis rules which comprise complicated relationships between conditions in diagnosis rule, and factors related to diagnosis rules uncertainty can be figured out based on the conditions involved in concerned rules. In expert systems application development, the rule presentation method was applied, which reveals that the method proposed is effective and feasible.