3 0 8 V o l . 3 0 No. 8 2 0 0 8 8 S y s tems E ng i ne er i n g an d E l ec t ro n ic s Aug. 2008 : 1001 2 506X(2008) 08 2 14812 04 :20072 012 22 ; :20082 012 08 : (20060613019) : (19832 ), , , , E 2mail :newton83 @163. com 1 , 1 , 2 (1. , 610031 ; 2. , 610031) : , , , : ; ; ; : N 945. 25 ; TP 18 :A New methodology of attribute weights acquisition based on rough sets theory LIU Dun 1 , HU Pei 1 , J IAN G Chao2 zhe 2 (1. School of Economics and Management , Southwest J iaotong Univ. , Chengdu 610031 , China; 2. Coll. of Traf f ic & Transportation, Southwest Jiaotong Univ. , Chengdu 610031 , China) Abstract : By considering the disadvantage in traditional decision making methodologies , the thought of at 2 tribute reduction with rough sets theory (RST) is used to propose two definitions of important degree , and a new method of weight acquisition based on RST and a new pattern of criteria are proposed to solve the problems of subjectivity and redundancy in traditional decision 2making. The mistakes of mathematical logistic in extenics are analyzed and discussed in the new method. A comparison is made between the proposed method and the oth2 er decision 2making methods , and an experimental study is given to validate the validity and feasibility of the pro2 posed thought , which provides a new methodology in management decisions. Key words : rough sets theory; weight ; subjectivity; redundancy 0 , , , AHP TOPSIS ELECTRE [1] , , , : ; Pawlak Z 1982 (rough sets theory RST) [2] , , , , , , 1 , , , , , , ; , , , , , 2 , ,