变精度粗糙集模型中β参数范围的确定  

Confirming the Range of β Parameter in the Variable Precision Rough Sets Model

作　　者：刘妍琼[1] 钟波[2] 

机构地区：[1]湖南理工学院数学系,湖南岳阳414006 [2]中南大学商学院,长沙410083

出　　处：《湖南理工学院学报（自然科学版）》2008年第1期11-13,共3页Journal of Hunan Institute of Science and Technology(Natural Sciences)

摘　　要：正确分类率β是变精度粗糙集模型中重要的参数之一.针对变精度粗糙集中β参数的确定缺乏可预见性的问题,提出了在确定近似分类质量γ下β取值范围的确定方法.首先在选取特定β值的情况下,根据约简条件求取所有β约简;然后在近似分类质量保持不变的前提下,确定β参数的取值范围;最后通过一个算例验证了该方法的有效性.The correct classification rate β is one of the important parameter of variable precision rough sets model. To the problem that the variable precision rough set lacks a feasible method to determine the β parameter; in this paper, an effective method is developed to confirm the range of β value by the γ value of approximate quality of classification. First, we calculate all the value of β reduction according to reduction condition on the base that β value is certain.Furthermore, we will confirm the range of β value on the base that the approximate quality of classification is fixed; Finally, an example is given to approve the effectiveness of the nronosed method.

关 键 词：变精度粗糙集 近似分类质量 β约简 β参数 

分 类 号：O159[理学—数学]