查询词典 symmetries

As a re-sult, a wide classes of partial differential equations of this form which admit potential symmetries are obtained by systematic classifica-tion methods.

我们通过系统的分类方法得到了一大类允许势对称的这种形式的方程组，并给出了它们的对称群。

In Chapter Ⅰ, based on the helical and rotational symmetries of nanotubes we study the energy dispersion relations and electronic wave functions.

第一章，基于碳管的螺旋和旋转对称性，研究了碳管的能带结构，得到了碳管的能量色散关系及电子波函数。

This text is mainly about the analysis of the palindromes of Y chromosome. We mainly used DOTTER program for detailed comparison of two sequences to obtain these results. The main contents are as follows:Chapter one mainly introduces the whole characteristics of human Y chromosome;Chapter two mainly describes the characteristics, functions and recombination modes of the palindromes in Y chromosome;Chapter three mainly analyses the symmetries of 8 palindromes of Y chromosome, we find a mechanism of symmetry breaking in P2 palindrome from a detailed analysis;initially introduces other 7 palindromes.

本文主要借助于DOTTER程序对Y染色体的回文序列进行分析，主要内容如下：第一章主要介绍人类Y染色体的整体特征；第二章主要描述Y染色体中回文序列的特征、功能及重组模式；第三章主要是对Y染色体8个回文序列的对称性分析，主要对P2回文进行了详细分析，提出了P2回文的对称性发生破缺的机理；对其他7个回文进行了初步分析。

This text is mainly about the analysis of the palindromes of Y chromosome. We mainly used DOTTER program for detailed comparison of two sequences to obtain these results. The main contents are as follows:Chapter one mainly introduces the whole characteristics of human Y chromosome;Chapter two mainly describes the characteristics, functions andrecombination modes of the palindromes in Y chromosome;Chapter three mainly analyses the symmetries of 8 palindromes of Y chromosome, we find a mechanism of symmetry breaking in P2 palindrome from a detailed analysis;initially introduces other 7 palindromes.

本文主要借助于DOTTER程序对Y染色体的回文序列进行分析，主要内容如下：第一章主要介绍人类Y染色体的整体特征；第二章主要描述Y染色体中回文序列的特征、功能及重组模式；第三章主要是对Y染色体8个回文序列的对称性分析，主要对P2回文进行了详细分析，提出了P2回文的对称性发生破缺的机理；对其他7个回文进行了初步分析。

Based on the Lie algebra that describes the symmetries, it is proved in this dissertation that a sufficiently large class of control Hamiltonians can be provided by the universal enveloping algebra of the Lie algebra, on which the quantum mechanical control systems can be modelled.

基于描述量子力学系统对称性的李代数结构，本文证明该李代数的泛包络代数提供了足够大的一类控制哈密顿量，因而可以在其上建立量子力学控制系统的模型。

The underlying concepts are based on differential geometry and theory of Lie groups in the mathematical aspect, and on transformation symmetries and gauge theory in the physical aspect.

基础的概念在数学方面基于不同谎话组的几何学和理论，并且关于在物理方面的转变对称性和计量器理论。

Then we in-vest gate Seiberg-Witten map, which defines the equivalence relation of the gauge symmetries in different spaces. We also analyse the U gauge electromagnetic field in noncommutative space. Finally we discuss the ambiguities of Seiberg-Witten map, and find although that some part of the ambiguities can be absorbed by gauge transformation and hence negligible, the existence of the matter field makes some other parts difficult to be absorbed by gauge transformation or field redefinition.

然后利用Seiberg-Witten映射，我们研究了不同空间的规范对称性的等价问题，并对非对易空间的电磁场进行了微扰分析，最后我们对Seiberg-Witten映射的松动进行了讨论，研究发现这些松动中的一部分可以由规范变换吸收因而是可以忽略的，由于物质场的存在，另外一部分很难用规范变换和场的重定义吸收。

In Plato's "Symposium", Aristophanes argues that the origins of love lie in the search for symmetry, while Pythagoras and Theaetetus—who discovered the icosahedron, the geometric shape with 20 triangular faces—explored the symmetries of geometric figures.

在柏拉图的《会饮篇》中，阿里斯托芬提出爱的缘起就在于对对称的寻觅，而毕达哥拉斯和发现由二十个三角形面组成的二十面体的泰阿泰德则探究几何形体的对称。

An even more important fact is that these symmetries implicate a large number of conservation laws at the particle level.

还有一个更重要的事情，这些对称性暗示着大量的守恒定律。

In this paper,all symmetries of the generalized kdv equation are obtained by means of infinitesimal generator of Lie group of transformation.

本文用Lie变换群的无穷小方法，求出了广义kdv方程的全部对称，并用特殊的对称将其化为常微分方程。

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜，这支南方球队将会更坚持其一贯而有效的4-3-3阵型，洛佩斯和塞德维奇将取代受伤缺席的詹保罗，和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外，西方较自由的生活方式对年轻人的影响增大。