查询词典 multiple arc

It's really the natural setting for algebraic topology because the traditional algebraic invariants (fundamental group, homolog group,etc.) arc isomorphic not only for homeomorphic spaces but for spaces of the same homotopy type. Homtopy epimorphisms and monomorphisms are special morphisms in the category of topological spaces and the initial research of them may be traceable to S.T.

同伦论的本质是利用比同胚关系更广泛的等价关系—同伦关系来对拓扑空间进行研究，这也是代数拓扑研究中一种自然的考虑，因为传统的代数不变量不仅在同胚的空间之间保持同构，而且在具有相同伦型的空间之间也保持同构。

Allingham also released a new book on Sept. 30 tracing the arc of his 112-year life.

艾林翰也在9月30日出版新书《柯齐纳最后的志愿军》，追溯他过去112年生命的弧线。

The intermittent alternative transverse magnetic field has influence on the swing frequency of welding arc.

外加横向间歇交变磁场改变了电弧的摆动频率。

The influence of duty ratio of longitudinal intermittent alternative magnetic field on microstructure and properties of plasma arc surfacing layer was researched.

研究了纵向间歇交变磁场占空比对等离子弧堆焊金属组织及性能的影响。

Since the production of carbon nanotubes synthesized by arc-discharge method contains impurities such as carbon nano-particles, amorphism carbon and graphite fragment, several purification methods were used to purify carbon nanotubes. It is found that with oxidation method in air, we can easily get purified carbon nanotubes.

由于用电弧放电法合成出来的纳米碳管产物中除了有纳米碳管外，还含有一些纳米石墨颗粒、无定形碳和石墨碎片等，因此本文对用电弧放电法合成出的纳米碳管进行了多种方法、探索性的提纯研究，实验结果发现，利用大气氧化法对纳米碳管进行提纯效果好，设备简单，是一种方便实用的方法。

So it may be inferred that the protolith of the amphibolite is the product of different degrees of partial melting of the mantle in a magma arc.

显示出壳源性质或者是受到大陆下地壳的混染作用而形成。

Rich andesite of island arc type in the Sawuershan formation of Middle Devonian.

其容矿岩石为中泥盆统萨吾尔山组的岛弧型富钠质安山岩。

A unit of ''.'angular'.'' measure equal to the angle subtended at the center of a circle by an arc equal in ''.

弧度平面角的一种衡量单位，其大小为''。

The unit of plane angle adopted under the System International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees).

国际单位制采用的平面角单位；长度等于半径的弧所对的圆心角。

The influences on gas flow and dielectric strength recovery properties, which are caused by altering the angle of elevation, the dimension and the profile of arc nozzle of SF6 circuit breaker, were investigated.

SF6高压断路器的喷口对断路器开断过程中吹弧气体的流动特性起着控制作用，从而成为灭弧室的心脏。

The studies on the developing of new media are very important to the increasing of the area density of HDD and to the implementation of hybrid recoding technology.

光磁混合记录方法，是一种可以突破超顺磁极限的限制，并进一步提高硬盘记录密度和读写速率的一种新型超高密度信息存储方式。

In io, mTOR inhibition promotes T cell anergy under conditions that would normally induce priming.

体内研究中，在正常可激发免疫反应的条件下，抑制mTOR可促使T细胞无能。