In this paper,finite groups with commutative automorphism groups are studied by using the methods of ring theory,and a new technique for construcing automorphisms is introduced which can be used to prove such non-commutative groups and their maximal subgroups have non-cyclic central subgroups.
借助于环论的方法研究了具有交换自同构群的有限群,提出了一种新的自同构构作技术,并用之证明了这样的非交换有限群具有非循环的中心子群,以及其每个极大子群的中心子群也都非循环。
In 2008, Ya-dav proved that if G is a finite non-abelian p-group and M is a central subgroup of G then CAut G(G/M, Z(G))=Inn G if and only if the nilpotency class of G is 2,G\'≤M and M is cyclic.
2008年Yadav将其推广为：如果G是有限非交换p-群且M是G的一个中心子群,则当且仅当G的幂零类为2,G\'≤M且M是循环群。
In dedicated passenger line,the local train control center(TCC) makes use of the technology conditions which the existing equipments provided,it can communicate with the adjacent TCCs safely and estimate the train occupation logically based on the software,so that it can make a judgment of the track section .
客运专线列控中心利用现有设备所能提供的技术条件,采用软件处理的方法通过站间安全信息传输和轨道电路占用逻辑检查,对发生分路不良的区段做出判断,并选用HU码作为防护码序对后续轨道区段的编码进行控制,防止追踪列车意外闯入,有效降低了区间分路不良对行车安全的风险。
Station Train Control Center is one kind of important signal equipment of the Level 2 Chinese Train Control System and in the speedup projects of existing railway.
车站列控中心是CTCS-2级列控系统和既有线提速的重要信号设备。
Though the railways have different train control system, the working principle of train control center is very similar.
尽管各高速铁路采用的列车运行控制系统都不尽相同,但它们却有着基本相似的工作原理,扼要阐述列控中心的工作原理,并对高速列车运行的控制信息——报文做进一步举例说明。
On the Center of Two-parameter Quantum Groups U_(r,s)(SO_5)
关于U_(r,s)(SO_5)型双参数量子群的中心
Influences of the Centralier and S-Normality of a Minimal Subgroup on the Structure of a Finite Group;
极小子群的中心化子及s正规性对群结构的影响
Automorphisms and Inner Automorphisms of Centralizers of Group Element to Be A Clifford Semigroup on the Finite Symmetric Inverse Semigroup
对称逆半群的中心化子为Clifford半群时的自同构与内自同构
Finite Groups in Which Each Non-trivial Subgroup is Selfcentralizer;
非平凡子群皆自中心化的有限群(英文)
The crowds concentrated in the centre of the town near the store.
人群集中在商店附近的镇中心。
Research on the Development of Guanzhong City Cluster with Xi’an City as the Center
以西安为中心的关中城市群发展研究
a parade of strollers on the mall.
在购物中心的一群游逛者
The Study of Distribution Center Location Based on Particle Swarm Optimization Algorithm;
基于微粒群算法的配送中心选址研究
How to Choose the Central City After the City Group of Changzhutan Transforms;
长株潭城市群转型后的中心城市选择
On the Core Role of Tutors in Learners Guidance Group;
试论导学教师在导学群中的核心作用
Learning by Doing & Source of Core Competence of Industrial Cluster;
“干中学”与产业集群核心能力的形成
Analysis of Mass Official Crimes in View of Social Psychology;
社会心理学视域中的群体化职务犯罪
On the Public Movie-Watching Psychology and the Making of Audience;
中国大众的观影心理、群落构成初探
On the Construction of Central City Group System in Chongqing;
试论重庆中心城市群网络系统的构建
The Party was then close in feeling to the masses and its prestige among them was high. The general atmosphere in society was fine, and the cadres and the people in general were in high spirits.
那个时候，党和群众心连心，党在群众中的威信比较高，社会风尚好，广大干部群众精神振作。
Females in Buddhist Stories
佛教故事群中的女性——以《经律异相》之记载为中心
Ethnic Prejudice and Identity Reconstruction:A Discussion Centered on "Dan People";
族群歧视与身份重构:以广东“疍民”群体为中心的讨论
The Cooperation between IFC and Large City Agglomeration:Discussion on the Construction of Shanghai IFC
国际金融中心与大城市群的协同性——兼论上海国际金融中心的建设