含属性加权模糊序决策信息系统的近似约简

徐伟华, 孔子默, 陈曜琦

Approximate reduction of fuzzy ordered decision information system with attribute weighting

Weihua Xu, Zimo Kong, Yaoqi Chen

表3 表1的下近似辨识矩阵

Table 3 The lower approximation identification matrix of Table 1

	$x_{1}$	$x_{2}$	$x_{3}$	$x_{4}$	$x_{5}$
$x_{1}$	$?$	$a_{3}$	$a_{3}$	$?$	$?$
$x_{2}$	$?$	$?$	$?$	$?$	$?$
$x_{3}$	$?$	$a_{2}$	$?$	$?$	$?$
$x_{4}$	$?$	$a_{3}$	$a_{3}$	$?$	$?$
$x_{5}$	$?$	$a_{3}$	$a_{3}$	$?$	$?$