P-集合(packet sets)具有动态特性,它是由内P-集合XF与外P-集合XF构成的集合对(XF,XF)。基于具有内动态特性的信息系统,应用内P-集合,提出(Fˉ,F-)-信息概念;讨论(F,F-)-信息的辨识与过滤。给出(F,F-)-粒度与(F,F-)-过滤系数概念,得到(F,F-)-信息辨识方法与辨识准则,以及(F,F-)-信息过滤定理与过滤准则,并给出(F,F-)-信息的辨识-过滤应用。(F,F-)-信息辨识与过滤的讨论结果为研究具有内动态现象的信息过滤-发现提供了一种新方法。
P-sets(packet sets) has dynamic characteristic.It is a set pair(X F,X F) which is composed of internal P-sets X Fˉ and outer P-sets X F.Based on the information systems which are internal dynamic characteristic,the concept of(F,F-)-information is proposed by using the internal P-sets.Identification-filtration of (F,F-)-information are discussed.Mean-while,the concepts of(F,F-)-granulation degree and(F,F-)-filtration coefficient are proposed.The identification method and criterion of(F,F-)-information,the filtration theorem and criterion of(F,F-)-information as well as the application about identification-filtration of(F,F-)-information are given.The results provide a new method for researching information filtration-discovery about internal dynamic phenomenon.