3) relative reduction
相对约简
1.
The influence of the necessary attributes after class subdivision on the upper and lower approximate values,quality and accuracy of approximate classification,number of decision-making rules and relative reduction are analyzed theoretically.
针对粗糙集的决策系统,给出了有效等价类细化和有效集合细化的定义,从理论上分析了必要属性细化后对上近似和下近似、近似分类精度和质量以及决策规则的数量和相对约简的影响。
2.
By means of the methodology of rough set,different attribute classification methods for decision systems are first analyzed in this paper,and the attribute significance as well as the extremely small subset of the attribute relative reduction caused by a classification variety is discussed.
应用粗糙集的方法,分析决策系统中不同的属性分类方法,以及不同分类方法引起的属性重要性与属性相对约简极小子集的变化情况,寻求属性分类方法与属性约简结果相互影响的内在因素,给出高效的属性分类方法和合理确定约简子集的策略,生成策略对应软件的实现算法,并运用软件实现算法来选取相对约简子集。
3.
Two parameters for different level partitions (or similar degree between objects) α,β are used in these reductions, in which the positive region formula of the decision level set are adopted for relative reduction and importance degree of attributes, and the distributed reducti.
这些约简利用了2个水平划分参数(或对象相似度)α、β,其中相对约简与属性重要性度量采用了决策类的水平集正区域公式。
4) approximate relative reduction
近似相对约简
1.
In this paper, the definition of approximate reduction and approximate relative reduction based on degree rough set model is brought forward, at the same time some of its correlative characteristics are dis cussed.
基于程度粗糙集模型提出了知识的近似约简和近似相对约简的定义,并且讨论了它们的一些相关性质。
5) relative reduction of knowledge
知识相对约简
1.
A heuristic algorithm for relative reduction of knowledge based on conditional information quantity is proposed.
通过在信息系统中引入了知识的条件信息量的概念,证明了在知识相对约简过程中条件信息量的变化趋势是递减的;通过条件信息量定义了属性的相对重要性,提出了一种基于条件信息量的知识相对约简算法,分析得到该算法的时间复杂性为O(|C|3|U|2);通过例子分析,表明该算法是有效的。
6) relative attribute reduct
相对属性约简
1.
We study in this paper relations between absolute and relative attribute reducts of an information table.
研究信息表绝对属性约简与相对属性约简之间的关系,指出一个绝对属性约简通常只是包含而不一定会是相对属性约简,同时给出相对属性约简不是绝对属性约简的一个充分条件。
补充资料：简格
1.泛指盛放兵器的用具。简﹐盛弩矢的器具;格﹐放刀剑等的架子。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条