Title :
Further Discussion of the Problem about Conditions of Neighborhoods Forming a Partition
Author :
Nianbai Fan ; Zhenyu Huang ; Tao Sun ; Yongfu Zhang
Author_Institution :
Inst. of Inf. Sci. & Eng., Hunan Univ., Changsha, China
Abstract :
There is an open question regarding Rough Set theory propsosed by Yun and Qiu(2011), which are how to characterize the conditions for a neighborhood of a data item approximations to form a partition of the universe U of the data by using only their upper and lower operators. The first part of the question has been solved Fan and Hu(2012). In this paper, another part of the question is addressed by a special and simple method, and some significant results are obtained.
Keywords :
approximation theory; mathematical operators; rough set theory; data item approximation; lower operators; neighborhood forming conditions; rough set theory; upper operators; Approximation methods; Computer science; Educational institutions; Information science; Rough sets; Covering; Lower approximation; Neighborhhod; Partition; Upper approximation;
Conference_Titel :
Intelligent Systems (GCIS), 2013 Fourth Global Congress on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4799-2885-9
DOI :
10.1109/GCIS.2013.16
