等价关系

Using elementary discernibility matrix and the significance of attributes defined,a knowledge reduction algorithm for incomplete information systems is presented.

经典粗糙集理论建立在等价关系的基础之上，通过知识约简，为从信息系统中获取有用知识提供了一种全新的方法。

The classic rough set theory is based on equivalence relation, but it is not able to handle the incomplete information system.

经典粗集理论以等价关系为基础，它们在处理不完备信息系统的时候存在一定的局限性。

Information entropy of an equivalence relation has many regular and interesting properties.

等价关系上的信息熵具有最为简单、规范的性质。

Whether or not it is part of a regional system ultimately depends on the equivalence relation that is being used.

Whether或没有它是一个区域系统最终取决于等价关系正在使用。

It is proved that both channel homotopy and communication space homotopy is equivalence relation.

证明了渠道同伦和传播空间同伦都是等价关系。

Accordingly, using a particular regional system amounts to working with a special equivalence relation defined on the space of reference.

因此，使用特定区域制度的数额与一个特殊等价关系确定的空间范围。

Similarly ,a equivalence relation is given on the fibrewise topology space we can also get its quotient space.

同样的在一个纤维空间中定义一个等价关系，研究其纤维商空间。

However, the traditional accuracy measure does not take into consideration the granularity of the partition induced by an equivalence relation.

但传统精度没有考虑到由等价关系导出的划分的颗粒大小。

The factorizable language L can be used to define an equivalence relation R〓 for all possible strings Σ〓.

可分解语言L在所有可能的字符串∑〓之间定义了一种等价关系R〓。

Secondly,given a fibrewise equivalence relation on the topolgy space we can get its quotient space.

其二是，我们都知道在拓扑空间中定义一个等价关系则能得到其相应的商空间。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。