摘 要：就最近提出的λ- 粗糙集进行变精度的扩展，更加精确地解决实际问题。首先给出变精度λ- 近似空间以及对应上下近似的具体定义，其次给出变精度λ- 近似空间重要的性质以及与λ- 近似空间的不同之处，最后利用变精度粗糙集的优势，给出一个具体的实例，呈现它在决策中的实际应用，并说明变精度λ- 粗糙模型的优越性。
关键词：λ- 粗糙集；变精度；决策
中图分类号：TP18 文献标识码：A 文章编号：2096-4706（2019）23-0005-04
Variable Precision λ-Rough Set Model and Its Application in Decision-making
WU Mengxuan
（Renmin University of China，Beijing 100872，China）
Abstract：This paper extends the variable precision of the recently proposed λ-rough sets to solve practical problems more accurately.Firstly，the definitions of variable precision λ-approximation space and corresponding upper and lower approximation are given，and the important properties of variable precision λ-approximation space and the differences between variable precision λ-approximation space and λ-approximation space are given. Finally，by using the advantages of variable precision rough set，a concrete example is given to show its practical application in decision-making，and the advantages of variable precision λ-rough model are illustrated.
Keywords：λ-rough set；variable precision；decision-making
参考文献：
[1] YU B，CAI M，LI Q. A λ -rough set model and its applicationswith TOPSIS method to decision making [J].Knowledge-Based Systems，2019，165：420-431.
[2] MARDANI A，JUSOH A，ZAVADSKAS E K .Fuzzy multiple criteria decision-making techniques and applications - Two decades review from 1994 to 2014 [J].Expert Systems with Applications，2015，42（8）：4126-4148.
[3] ZIARKO W .Variable precision rough set model [J].Journal of Computer and System Sciences，1993，46（1）：39-59.
[4] PAWLAK Z.SŁOWIŃSKI R. Rough set approach to multiattribute decision analysis [J]. s.n.，1994，72（3）：443-459.
作者简介：吴梦轩（1993.06-），男，汉族，河南平顶山人，研究生在读，研究方向：数理统计、大数据。