catchment

This paper first introduces the concepts of regular P-congruences and partial kernel normal system on S(P),then gives the regular P-congruences on S(P)an abstract characterization by means of the partial kernel normal system and a necessary and sufficient condition for a set B={B_i∶i∈I}of pairwise disjoint subsets of S(P)which is a partial kernel normal system in S(P)with P∩B_i as its C-set.

然后借助于部分核正规系给出了S(P)上正则P-同余的一个抽象刻画,给出了互不相交的S(P)的子集B={Bi∶i∈I}是以P∩Bi为C-集的S(P)的部分核正规系的充分必要条件。

First of all,the concept of C-set is introduced in this paper.

本文首先给出了c-集的概念,然后在有限补拓扑空间及可数补拓扑空间的基础上引入了c-补拓扑空间的概念并对其性质进行了初步探讨。

The compressive strength, splitting tensile strength and etc of the PC-CSA cement concrete is investigated, and the compatibility of PC-CSA cement with additives, the workability of PC-CSA cement concrete is also discussed in this paper.

PC-CA水泥是由硅酸盐水泥熟料、硫铝酸盐水泥熟料和石膏,按一定比例复合制备的复合水泥体系,其中硅酸盐组分占绝大部分。

Objective To explore the normal pregnant women,patients with GDM insulin and AFCP changes in the level of understanding of their relationship with neonatal complications.

目的探讨正常妊娠妇女、妊娠期糖尿病(GDM)患者羊水C肽(amnioticfluidC-peptide,AFCP)与胰岛素水平的变化,了解其与新生儿并发症的关系。