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本文认为征兆覆盖原理在诊断问题中有两层不同含义:问题的目标解集通过证据与目标之间的因果关系可以被所有事实所解释;同时,该目标集又能通过证据与目标之间的诊断关系解释所有事实。根据Zadeh的模糊关系理论,本文给出了这两类解释的形式化表示,并给出了诊断问题求解的一种方法;最后,本文讨论了诊断问题的分解和简化途径。
This paper argues that the concept of symptom coverage has two different meanings in the diagnosis problem: the solution of the problem’s goal can be explained by all the facts through the causal relationship between the evidence and the goal; at the same time, the goal set can pass the relationship between evidence and goal Diagnose the relationship to explain all the facts. According to Zadeh’s fuzzy relation theory, this paper gives a formal representation of these two kinds of explanations, and gives a solution to the problem of diagnosis. Finally, this paper discusses the decomposition and simplification of the diagnosis problem.