基于粗糙描述逻辑的不精确时态知识表示研究

Study of imprecision temporal knowledge representation based on rough description logic

在粗糙描述逻辑基础上扩充不精确时态关系,以满足不精确时态知识表示与推理的需要。首先给出了粗糙集及粗糙描述逻辑的相关概念;接着通过定义粗糙时态描述逻辑不精确时态关系,扩展了粗糙描述逻辑中具体域,并给出了可靠性和完备性证明;最后通过实际例子说明粗糙时态描述逻辑的知识表示和应用,结果表明扩展后的粗糙时态描述逻辑可以实现不精确时态知识的表示与推理。

In order to meet the need of representation and reasoning of uncertain temporal knowledge, uncertain temporal rela-tionship is extended based on rough description logic. Firstly, some relevant concepts of rough sets and rough description logic are given; Secondly, concrete domains of uncertain temporal is extended into rough description logic by defining uncertain temporal relation of rough temporal description logic, and the prove of its reliability and completeness are given; Finally, representation and application of the rough temporal description logic are validated by a practical example. The result shows that it is easy to represent uncertain temporal knowledge using the extended rough temporal description logic.