语义不确定时态的区间集重构及近似度量方法研究  

Research on Interval Sets Reconstruction and Approximation Measurement of the Temporal with Semantics Uncertainty

作　　者：陈磊[1,2] 左亚尧[1,2] 封朝永 

机构地区：[1]广东工业大学计算机学院,广州510006 [2]中国互联网络信息中心互联网基础技术开放实验室,北京100190

出　　处：《小型微型计算机系统》2015年第3期454-459,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60970044)资助;广东省自然科学基金项目(S2011040004281;S2013010014457)资助;DNSLAB资助

摘　　要：为了解决语义不确定时态的近似精确度度量问题,针对不确定语义造成的时态不确定性与多样性,提出对不确定语义进行转换的思想,将其转换为邻域或区间,成为可计算问题;结合时态的粒度属性与不确定的语义,给出了不确定时态粒点和不确定时态粒区的形式化描述,不确定时态元素因此可参与运算;提出了时态区间集将时态元素在离散状态下进行重构,采用下近似和上近似的思想明确划分了不确定时态中的确定元素和不确定元素;进而给出了不确定时态粒点和不确定时态粒区的近似精确度计算方法.In order to deal with the approximation accuracy measurement of the temporal with uncertain semantics, aiming at the uncer- tainty and diversity caused by uncertain semantics, the idea of converting uncertain semantics to neighborhood or interval was proposed to render the uncertain semantics computable. By the means of integrating the temporal granularity attributes with uncertain semantics, the formal descriptions of uncertain temporal granule points and uncertain temporal granule intervals were given. The consequence is that the uncertain temporal elements could be calculated in the operations. Furthermore, the temporal interval set was introduced to re- construct temporal elements in the discrete states, and the temporal elements could be divided into the certain and the uncertain parts according to the lower and the upper approximation. Finally, the approximation accuracy measurements of uncertain temporal granule points and uncertain temporal granule intervals were elaborated.

关 键 词：不确定 时态语义 粒度 区间集 近似度量 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]