1) Ir-open Set
Ir-开集
2) Ir-pseudo-open set
Ir-伪开集
3) Lα-closed Set
Ir开集
4) iridium
[英][ɪ'rɪdiəm] [美][ɪ'rɪdɪəm]
Ir
1.
Interdiffusion problem of iridium/rhenium was studied during preparation of iridium/rhenium thruster.
在电子探针测量的基础上,根据扩散理论和Ir-Re相图数据,建立了一个全新的Ir/Re两相扩散模型。
2.
The superficial characteristics of iridium-doped gold jewelry and the occurrence and the chemical compositions of doped material in gold jewelry have been investigated by using optical microscopy and X-ray fluorescence spectrum analysis.
采用显微镜和X射线荧光光谱分析方法对掺Ir黄金饰品的外观特征、掺入物的化学成分、存在形式等进行了研究。
3.
The progress in the research of iridium-coated rhenium thruster nozzle prepared by chemical vapor deposition(CVD) is reviewed in this paper.
Re/Ir发动机是美国研制成功的应用于空间飞行器的第三代高性能发动机。
5) open set
开集
1.
Open set and closed aggregate in Function of Read VariaNe;
实变函数中的开集与闭集
2.
This paper studies the composition of the open sets in Rn spaces and obtains the theorem of the composition of the open sets in Rn spaces.
本文研究了n维欧式空间Rn上开集存在的形式,并把R1的开集构造定理推广到了Rn上。
3.
In point set topological theory, open set and neighborhood are the basic concept.
在点集拓扑理论中,开集、邻域等是最基本的概念。
6) a-open set
a-开集
1.
Definition of the a-open set and the a-closed set in LF-topological spaces given,efforts are made to define the a- connectedness by means of a-open sets,following which a probe into some of its basic properties and equivalent depiction is done as well.
在LF-拓扑空间中定义了a-开集和a-闭集,并借助a-开集定义了a-连通,研究了它的一些基本性质和等价刻画。
补充资料：开集
开集
open set
开集【雌..就;。了盆p‘noe姗。欲cT加]，拓扑空间中的 该空间的拓扑(见拓扑结构(拓扑)(t俄力吻灿1sto义t理re(tQI扣10gy)))的一个元素.更明确地说，设拓扑空间(X，动的拓扑;定义为集X的子集系T，使得l)X任:，必‘T;2)如果o，。:，i二l，2，则0，自0:“;;3)如果o二任T，:〔级，则U{0:::“吸}e:.于是，空间(X，:)中的开集(openset)就是拓扑:的元素，并且只是这些元素. E .A.nacb几王K.撰
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参考词条