1) lower approximation set
下近似集
1.
And several rough set operation algorithms are also offered in this paper,such as upper approximation set,lower approximation set,intersection,cardinal number and so on.
通过讨论二进制与粗糙集之间的内在联系,提出基于二进制的粗糙集运算理论,并借助二进制的位运算操作,给出粗糙集的上近似集和下近似集、等价类的交、集合的基数的运算算法。
2) lower approximation
下近似集
1.
similarity measure, distance measure and entropy measure are defined for the object rank, then upper and lower approximations of concept are defined by using this fuzzy set method , and decision rules are achieved.
本文提出FPS模型解决这种不确定性,并在此基础上,为概念归纳推理定义了模糊粗糙集,为对象的排序定义了相似性测度、距离测度和熵测度,用模糊集方法定义了概念的上下近似集,并得出了决策规则。
3) lower approximate set
下近似集
4) upper/lower approximate sets
上下近似集
5) lower approximation consistent set
下近似协调集
6) lower approximation
下近似
1.
At last, a new definition of the rough degree is defined, and lower approximation has the same inequality and the same sufficient condition as upper approximation with the new definition.
最后,给出一个新的粗糙度定义,并证明在这种定义下,下近似具有与上近似一样的不等式及其充分条件。
2.
Then,the upper approximation and the lower approximation are renewed to define.
提出了一种新的粗糙近似算子,根据概率粗糙集模型中参数的特点,利用事件中的对立事件(或补事件),结合概率测度,从条件参数不等式的另一个侧面,重新定义了粗糙集中的上近似和下近似,并说明由此得到的粗糙集模型是Pawlak粗糙集模型的推广形式。
3.
The paper gives an improved definition of the upper approximation and lower approximation of rough set based on nonsymmetric similar relation,proves in theory that the improved definition is better than the orginal and finally illustrates by an examle.
改进了基于非对称相似关系的粗集的上、下近似的定义,并从理论上证明了新定义的上、下近似比原来的更合理,并进一步用一个算例来验证。
补充资料：〖ZK(〗各证集说诸方备用并五脏六腑集论合抄〖ZK)〗
〖ZK(〗各证集说诸方备用并五脏六腑集论合抄〖ZK)〗
内科著作。1卷。原题清叶桂(天士)家传，撰年不详。此书汇集内科杂证70余种，方剂近200首。每证各为一论，阐明疾病性质、病因、症状、治则及方药。论后每引经说，概括病机。所列方药服法亦皆详备。又列“五脏六腑论”一章，引用《内经》、《难经》，逐一论述五脏六腑之形象、部位、表里关系、病症及治法。本书内容多录自《临证指南》，恐系后人伪托叶氏之作。现存抄本
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