定性概率中的例外子类
Exceptional Subclasses in Qualitative Probability
摘要：
系统Z+ [Goldszynn and Pearl，1991，Goldszynn，1992]是一种形式主义，用于推理形式为“typically if phi then +（with strength cf）”的正规缺省值，其中6是一个正整数。该系统有一个严重的缺点，即它不批准跨异常子类的继承。在本文中，我们提出了一个扩展系统Z+，纠正这个缺点，从默认数据库中提取世界之间的附加条件。我们表明，额外的约束条件不改变数据库的一致性的概念。我们还与竞争默认推理系统进行比较。
英文摘要：
System Z+ [Goldszmidt and Pearl, 1991, Goldszmidt, 1992] is a formalism for reasoning with normality defaults of the form "typically if phi then + (with strength cf)" where 6 is a positive integer. The system has a critical shortcoming in that it does not sanction inheritance across exceptional subclasses. In this paper we propose an extension to System Z+ that rectifies this shortcoming by extracting additional conditions between worlds from the defaults database. We show that the additional constraints do not change the notion of the consistency of a database. We also make comparisons with competing default reasoning systems.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
