A space is shrinking if and only if it is normal and there is a σ closed rifinement for its any increasing open cover.
拓扑空间的仿紧性质是拓扑空间的重要性质 ,为了讨论拓扑空间的仿紧性质以及仿紧性质的各种推广 ,讨论了拓扑空间的强收缩性质 ,得了如下结果 :拓扑空间是强收缩的充要条件是它是正规的且对它的任一单增开覆盖存在 σ-闭加细 。
If for any increasing open cover of a topology space there is a countable sub cover of it and it is countable meta compactness,it has Lindel o ¨f property.
如果对拓扑空间的任意单增开覆盖 ,都存在可数子覆盖 ,且是可数亚紧的 ,则是 Lindelo¨f的 。
The definitions of pointwise preimage entropies,preimage branch entropy,and preimage relation entropy for nonautonomous discrete dynamical systems given by a sequence of continuous selfmaps of a compact space are given by using open covers.
对紧致拓扑空间上的连续自映射序列应用开覆盖定义了点原像熵、原像分枝熵以及原像关系熵等几类原像熵。
The concept of strong open covering is used to introduce the m compactness in fuzzy topological space.
在模糊拓扑空间中利用强开覆盖的概念引进一个称作 m-紧的紧性定义 ,并研究了它与模糊网的 m-收敛之间的关系 。
The overlay switch and the interchange technique are employed, which can speed up field data collection and reduce the costs.
使用覆盖开关 ,采用互换法 ,提高了野外数据采集速度 ,降低了成
Every open covering of X has a finite sub-covering.
每个开覆盖都有一个有限子覆盖。
To remove a cloak or cover from.
脱去外套或揭开覆盖物
X is quasi-compact (that is, every open covering of X has a finite sub-covering) .
X是拟紧的（即对于X的每个开覆盖都有一个有限子覆盖）。
A Ky Fan Tape Matching Theorem for transfer Open Covers and Its Applications;
转移开覆盖的Ky Fan型匹配定理及其应用
The cover for such an opening.
舱口盖覆盖这种开口的盖子
Bypass file conflict checks, overwriting conflicting files.
绕开冲突文件检测，覆盖冲突文件。
%s Is already open. Overwrite this file?
%s已经被打开. 覆盖此文件吗?
(Brit) an area of open or forested country.
在英国，指开阔的或被森林覆盖的地区。
A Study on Three-dimensional CAD of Panel Flanging Die Design;
覆盖件翻边模三维CAD系统研究与开发
To cover with a thin protective layer.
覆盖以薄的保护层覆盖
To cover or surround with mulch.
覆盖用覆盖层覆盖或包围
covering property
盖染性,遮盖性,被覆性,覆盖性
The leaves over Hintock unrolled their creased tissues.
覆盖着辛托克的树叶，展开了它们皱巴巴的叶面。
Application of Surface-flattening Technology in Blank Development of Automotive Cover;
曲面展平技术在汽车覆盖件毛坯展开中的应用
Research on Parameter of Trip Mining under the Thickness Collapsible Loss;
巨厚湿陷性黄土覆盖层下条带开采参数研究
Study on Failure Law of Surrounding Rock and Overlying Bed in Steep and Specially Thick Coal Seam Mining;
急斜特厚煤层开采围岩与覆盖层破坏规律研究
Application of Participatory Technology Development in Mulching Cultivation of Garlic;
参与式技术开发在大蒜覆盖栽培中的应用
Study and Development of System That Anticipate Aviation-communication Overlay on Space of Radar-control
雷达管制空域信号覆盖评估系统的研究与开发