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Reasoning about Uncertain and Incomplete Temporal Knowledge

机译:关于不确定和不完整的时间知识的推理

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Absolute-time-stamping of temporal data provides an efficient indexing method for temporal information systems, but suffers from the requirement that precise time values for all temporal data need to be available. Temporal knowledge in many Artificial Intelligence systems can be uncertain due to the unavailability of complete and absolute temporal information. This paper introduces an inferential framework for reasoning about uncertain and incomplete temporal knowledge: the uncertainty is formalised in terms of temporal relations jointed by disjunctive connectives, while the incompleteness is due to the lacking of full temporal information. A graphical representation which allows expression of such uncertain and incomplete temporal knowledge is introduced, and based on which, the system can deliver a verdict to the question if a given set of statements is temporally consistent or not, and provide understandable logical inferences by linear programming and contradiction reasoning.
机译:时间数据的绝对时间戳为时间信息系统提供了一种有效的索引方法,但是需要有需要可用的所有时间数据的精确时间值。由于完整和绝对的时间信息,许多人工智能系统中的时间知识可能是不确定的。本文介绍了推理的推理框架,了解不确定和不完全的时间知识:不确定性在被析出结缔组织接合的时间关系方面正式化,而不完整是由于缺乏全部时间信息。允许表达这种不确定和不完整的时间知识的图形表示,并且基于该图,如果给定的一组语句在时间上是一致的或不通过线性编程提供可理解的逻辑推论,则系统可以向该问题提供判决和矛盾推理。

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