TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - ZHANG Sheng-li1, PAN Zheng-hua2 T1 - An improved  set description of negative knowledge processing in Fuzzy knowledge Y1 - JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 103 EP - 109 VL - 46 IS - 5 UR - http://lxbwk.njournal.sdu.edu.cn N1 - ER -