模糊形式背景下的技能层约简与前级(后级)知识结构的充要条件

冯丹露¹, 李进金^1,², 李招文³, 周银凤⁴, 杨桃丽¹

Skill Level Reduction and Necessary and Sufficient Conditions of Forward-Graded(Backward-Graded) Knowledge Structure in Fuzzy Formal Context

FENG Danlu¹, LI Jinjin^1,², LI Zhaowen³, ZHOU Yinfeng⁴, YANG Taoli¹

标记技能概念格 L ( Q , S^X , I )