结构群

This will be helpful for the design of new encryption systems. In this thesis, we studied the faithfulness of the DES within three rounds and the group generated by the 2-round DES.

本文研究了三轮以内的DES的忠实性和二轮的DES生成的群的结构，同时也考虑了强S-盒的设计的某些方面。

Also, we can present the geometric representation of biological sequences and structures. So the genometric topology and group theory are important also.

同样我们可以用几何方法来表示生物序列和二级结构，几何拓扑和群论也发挥了很大的作用。

Vegetation ecotype tend to be xerophyte and even hyper-xerophyte and finally replaced by annual plant. Community structure and species diversity also decrease as the ecological environment worsen, In this process, the height, coverage and biomass decreases by 56.6%、 80.8% and 74.2% respectively compared to steppe, and the indices of species richness, diversity and evenness decrease by 76.4%、 56.7% and 32.0%, but β diversity indices increase by 14.6 times, especially the decease of species gregariousness and the breadth and overlay of species Niche shows that grassland tend to be more sandy and vegetation retrogression succession take place.

其中，植被生态型逐渐由中旱生向旱生、超旱生过渡，并最终被一年生植被替代；群落结构及多样性呈明显递减规律，到严重沙化阶段，草群高度、盖度、生物量与典型草原相比，下降幅度分别达到56.6%、80.8%和74.2%；物种丰富度、多样性及均匀性分别降低76.4%、56.7%和32.0%；而群落β多样性增长14.6倍，特别是多年生物种群聚度降低和生态位宽度、生态位重叠值的下降，表明草地沙化，植被发生逆行演替。

This lets GrIS support the interpretation to complete in both single-computer mode and multi-computer mode with client/server structure in LAN and WAN environment.

首先分析了该技术的研究现状、技术背景和特点，然后提出了群判读的设计策略、基于客户端/服务器的总体框架结构、具体功能及其实现方法。

All crystals belong to monoclinic system, space group P2 (1)/c.

所有晶体结构都属于单斜晶系，空间群为P2（1）／c。

The structure was solved in the space group P2 1/c (# 14) by analysis of systematic absences.

该结构的空间群P2 1/c (# 14)通过系统缺失分析解出。

Andrea Bender allows us an insight into a world which seems to be running wild: against the backdrop of a small, narrow-minded German town full of half-timbered houses a mob is rising; girls are knocking out stout gentlemen in a ring; androgynous baroque folks are daring obscene dances with lusty apes.

安德里亚·本德给我们打开了一个看似疯狂的世界：地点是一个"思想"狭隘的德国小镇，小镇中到处都是木质结构的房子，一群乌合之众闹了起来；在拳击场，女孩子们把身材魁梧的男士打倒；雌雄同体的巴洛克人与贪欲的猩猩跳着令人作呕的舞。

Then we study holomorphic vector bundles with trivial pull-back on nonprimary Hopf manifolds, of which the fundamental group is 〓, get the filtrable property and the Structure Theorem.

然后我们研究了具有Abel基本群〓的非主Hopf流形上具有平凡拉回的全纯向量丛E，得到其可滤性以及结构定理。

As a result, it is very convenient to describe flood hydrograph at any site or any instant in terms of one dimensionless curve with the similarity.

提出了洪水过程的自相似性理论，运用群论方法论证了溃坝洪水的自相似解结构，据此可由一条曲线来表达任意时刻、任意位置的洪水过程。

A structure bearing or consisting of a reproductive organ or part, such as a reproductive polyp or bud in a hydroid colony.

生殖芽体有生殖器官或部分生殖器官的结构，如再生性珊瑚虫或螅状群的芽体

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。