集合代数

The implementation of object algebra by relational operator and spatial operator with the support of relational index and spatial index was discussed and the setoriented access methods were studied.

在系统实现方面，我们着重讨论了面向集合的对象存取方式及基于关系索引、空间索引和底层关系操作及空间操作的对象代数的实现机制。

Based on concepts of relative algebraic interior and relative topological interior of sets,some conditions assuring Ari+Bri in a linear space and conditions assuring riA+Bri in a linear topological space are given respectively,according to Tanaka and Kuroiwa' s conclusions.

根据Tanaka和Kuroiwa的结论，在集合相对代数内部和相对拓扑内部概念的基础上，分别讨论了线性空间中Ari+Bri和线性拓扑空间中riA+Bri成立的条件，从而将Tanaka和Kuroiwa关于内部的结论推广到了相对内部的情形

In this paper the notion of the greatest saturating congruence on an algebra is introduced and properties of these congruences are characterized.

本文首先引入了一个泛代数上的渗透一个子集合的最大同余的概念，然后对其性质进行了刻画。

We also discuss the various algebraic properties of fuzzy digraphs.

我们讨论了迷离有向图形的各种代数性质，然后定义一个集合的较佳迷离有向图形。

Finally,through some ideas from Algebraic Geometry,we constructed strongly exceptional collections of derived sheaf categories,and solved the problem that equivalences between some posets.

最后，通过代数几何里的一些思想，我们构造了导出层范畴的强例外集合，解决了一类偏序集的等价问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。