序数

Tetrahedron can be formed with four sequence and non-coplanar points in space,and any points in it can be represented by barycentric coordinate system with space affine transform.

给定空间不共面的四个有序数据点，可以形成一个四面体。

Discussions are given of the fate of Ms2 during translocation in the hexoploid triticale, the exchange of the names for 4A and 4B chromosomes in common wheat and the possible expoitation of the new locus Ms2 (4BS), and the following speculations are made: In geneic genes of allopolyploid organisms the donor chromosomes tend to be intergenomically translocated to their phylogically and evolutionarily close chromosomes with the same order number and the same arm; it is cofirmed that the 7th International Conference of Wheat Genetics was right to exchange the names between chromosomes 4A and 4B of common wheat in 1988; and as a new genetic marker and a breeding tool for all the chromosome B-carrying species in the tribe of Tritceae, Ms2 (4BS) may have wide application in building and expanding the gene pool of germplasm resources of various species of wheat.

对 Ms2基因在六倍体小黑麦与原太谷核不育小麦远缘杂交中易位时的走向，普通小麦4A与4B染色体的互换更名以及 Ms2(4BS)新位点的开发利用进行了讨论：认为异源多倍体生物核基因的组间易位倾向于从供体染色体向进化亲缘关系较密切，且染色体序数与染色体臂相同的部分同源染色体易位；1988年第7届国际小麦遗传学会对普通小麦4A与4B染色体的互换更名是正确的； Ms2(4BS)作为一个新型的遗传标记，作为小麦族内所有携带B染色体组的物种的育种工具和在拓建各类小麦种质资源的基因库等方面均有广泛的用途。

We have introduced in [1] the concept of the normal fuzzy set structure which is a characterization and generalization of fuzzy set theory and we have proved that any one normal fuzzy set structure is a Boolean-valued model of the axiomatic set theory ZFa with urel...

本文是对文献[1]的一种阐明，详细地阐明了正规弗晰集合结构与弗晰集合论中的一些基本概念之间的联系与转换，同时引进了正规弗晰集合结构的序数、基数等基本概念。

We have introduced in [1] the concept of the normal fuzzy set structure which is a characterization and generalization of fuzzy set theory and we have proved that any one normal fuzzy set structure is a Boolean-valued model of the axiomatic set theory ZFa wit...

本文是对文献[1]的一种阐明，详细地阐明了正规弗晰集合结构与弗晰集合论中的一些基本概念之间的联系与转换，同时引进了正规弗晰集合结构的序数、基数等基本概念。

The U.S. uses ordinal numbers for naming grades, unlike Canada and Australia where cardinal numbers are preferred.

美国采用序数来命名年级，不象加拿大和澳大利亚那样采用基数。

The percentage of permeability contribution and the corresponding ordinal number were obtained and used to draw the cumulative distribution curve of permeability in Cartesian coordinate system.

通过对任意一组空间分布相对均匀的渗透率数据降序排列，计算出渗透率贡献百分数及其对应的序数百分数，并在直角坐标系中绘制出渗透率累积分布曲线。

The cofinality of a set of ordinals or any other well ordered set is the cofinality of the order type of that set.

序数或任何其他良序集合的集合的共尾性是这个集合的序类型的共尾性。

All superclasses of closed unbounded classes are stationary and stationary classes are unbounded, but there are stationary classes which are not closed and there are stationary classes which have no closed unbounded subclass ( such as the class of all limit ordinals with countable cofinality ).

所有闭合无界类的超类是固定的并且固定类是无界的，但是有着不闭合的固定类并且有着没有闭合无界子类的固定类(比如带有可数共尾性的所有极限序数的类)。

For example, the cofinality of ω is ω, because the sequence ω·''m''( where ''m'' ranges over the natural numbers ) tends to ω; but, more generally, any countable limit ordinal has cofinality ω.

例如，ω的共尾性是ω，因为序列ω·''m''(这里的''m''取值于自然数之上)趋向于ω；但是，更加一般的说，任何可数极限序数都有共尾性ω。

Every finite ordinal is initial, but most infinite ordinals are not initial.

所有有限序数是初始的，而多数无限序数不是初始的。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。