分歧群

词组短语

ramification group

与分歧群相关的网络例句 [注：此内容来源于网络，仅供参考]

For example, Keyfitz made the classification of the bifurcations in one state variable, without symmetry up to codimension 7; Golubitsky and Schaeffer obtained the classification of the bifurcation problems in one state variable with Z_2 symmetry, in one parameter up to codimension 3; Golubitsky and Roberts studied the classification of degenerate Hopf bifurcation in two state variables with dihedron D_4 symmetry, in one parameter up to topological codimension 2; Melbourne obtained the classification of bifurcations in three state variables with octahedral symmetry, in one parameter, up to

需要指出的是以上研究均没有考虑分歧参数的对称性，Futer，Sitta和Stewart的工作虽然考虑了分歧参数的对称性，但仅限于分歧参数与状态变量具有相同的对称性，他们得到了状态变量与分歧参数均关于二面体群D_4对称，拓扑余维数不大于1的分歧问题的分类。高守平和李养成则讨论状态变量和分歧参数均具有对称性且对称性可以不同的分歧问题，并给出了状态(来源：A770707BC论文网www.abclunwen.com)变量关于二面体群D_4对称，分歧参数关于S~1对称，拓扑余维不超过1的分歧问题的分类。本文第一章讨论两个状态变量关于二面体群D_3对称，两个分歧参数关于O(2)对称的分歧问题，给出了该类分歧问题在非退化条件q(0)≠0下所有情形的分类与相应的识别条来源：AdadaBC论文网www.abclunwen.com

Transversality condition is used to characterize the stability of such equivariant bifurcation problems.

本文第五章利用奇点理论中光滑映射芽的左右等价关系，考虑在左右等价群的一个子群的作用下，分歧参数具有对称性的等变分歧问题的开折问题，得到了相应的通用开折定理。

Equivariant bifurcation problem; contact equivalent group; versal unfolding; stability; recognition

等变分歧问题；接触等价群；通用开折；稳定性；左右等价群；识别

The versal unfolding theorem obtained in this paper by using DA-algebras tools introduced by Damon not only includes many corresponding results but also cancels the stronger demand on the codimension of a bifurcation Problem in some of relevant references to establish more general unfolding theory.

本文第二章进一步研究在(来源：AB00c6C论文网www.abclunwen.com)接触等价群作用下上述等变分歧参数及其开折的稳定性问题，得到了这类分歧问题是稳定的等价于它是无穷小稳定的结论，并且用横截性条件刻画了这类分歧问题的稳定性。

Equivariant bifurcation problem; contact equivalent group; classification; recognition; left-right equivalent group; versal unfolding; uniquiness; stability

基础科学，数学，概率论、数理统计等变分歧问题；接触等价群；分类；识别；左右等价群；通用开折；唯一性；稳定性

Mayr emphasized the importance of allopatric speciation, where geographically isolated sub-populations diverge so far that reproductive isolation occurs.

迈尔强调异域成种的重要性；在地理上孤立的亚群产生的分歧偏离太远，以致出现生殖隔离。

The intergeneric phylogenetic trees of water lilies showed that Nelumbo and Ceratophyllum form a sister group, but with relatively high sequence divergence, supporting that place the two genera into two distinct families; and Brasenia and Cabomba form a sister group, with relatively low sequence divergence, supporting that the two genera were placed the same family Cabombaceae.

结果表明：莲属与金鱼藻属构成姐妹群，但序列分歧度较大，支持将两个属独立成科的观点；莼菜属与水盾草属构成姐妹群，且序列分歧度较小，支持现有的莼菜科处理。

This supported that Stemonaceae should be separated from Liliales and placed in Pandanales. Affinities and speciation of the species in Croomia The two Asian species of Croomia were more closely related to each other than either is to Northern American species.

Croomia的种间关系该属的3个种中，北美的C.pauciflora与两个亚洲种在分子树上已经分歧，根据单倍型和分子树该种与亚洲种的分离时间较早，很可能是从C.japonica的日本居群衍生形成或迁移到北美大陆的。

Increasingly deep cleavages separate one age group from another.

愈来愈深的分歧使不同的年龄群互相分离。

Karyotypic cluster: By the air-dried method, the numbers and the shape structure of chromosomes in 7 species are compared through the optic microscope.

在第Ⅱ分支中，尼泊尔紫胶虫与普萨紫胶虫的核型似近系数为0.9441，构成姐妹群，这两个虫种与其它5种紫胶虫亲缘关系较远，从群体中分歧出来，形成单独的枝系。

与分歧群相关的网络解释 [注：此内容来源于网络，仅供参考]

bigraded group：双重分次群

bifurcation theory 分歧理论 | bigraded group 双重分次群 | bigraded module 双重分次模

piecewise linear manifold：分片线性流形

分批试验法|block search | 分片线性流形|piecewise linear manifold | 分歧群|ramification group

ramification field：分歧域

ramification 分歧 | ramification field 分歧域 | ramification group 分歧群

ramification field：分歧体

分歧指数 ramification exponent | 分歧体 ramification field | 分歧群 ramification group

ramification group：分歧群

分歧体 ramification field | 分歧群 ramification group | 分歧指标 ramification index

ramification index：分歧指数

ramification group 分歧群 | ramification index 分歧指数 | ramification number 分歧数

ramification index：分歧指标

分歧群 ramification group | 分歧指标 ramification index | 分歧阶 ramification order