离散群

It is proved that the space which contains a free arc does not admit any chaotic group action.

第一章，介绍了离散群作用动力系统的一些背景及本文的主要结论。

We obtain that if any 〓 is discrete or elementaryand 〓 satisfies Condition A,then the algebraic limit G of group sequence 〓is discrete or elementary.

首先，我们不再仅仅考虑离散非初等群集〓的代数极限G，而是离散群或初等群群集〓的代数极限G，我们对〓上〓变换群中斜驶元及其不动点进行了细致研究，注意到任意一个斜驶元存在一个仅仅含有斜驶元的领域，从而证明了初等群群集〓的代数极限G仍然是初等群，进而我们得到了一个代数收敛定理：如果任一〓是离散群或者初等群并且〓满足条件A，那么，群列〓的代数极限G一定是离散群或者初等群。

In chapter 1, we introduce some background of the dynamical system of discrete group actions and the main results in this thesis.

第一章，介绍了离散群作用动力系统的一些背景及本文的主要结论。

This thesis is concerned with the dynamics of discrete group actions, especially we are interested in Zd actions.

本文考虑离散群尤其是Z~d作用的动力性质。

In this paper, a Robust Discrete Optimization model of elevator group control system is presented for dealing with the uncertainty in elevator traffic flow and computational complexity in scheduling. Based on RDO theory, we propose a new elevator group scheduling Algorithm. Comparison is carried between the RDO algorithm and other scheduling algorithms under the virtual simulation platform of elevator group scheduling.

针对电梯群控调度过程中交通流的不确定性和优化求解复杂性问题，本文通过建立电梯群控调度系统的鲁棒离散优化模型，实现了一种基于鲁棒离散优化理论的新的电梯群控优化调度算法。

We note that any pure elliptic subgroup ofI somis discrete if and only if G is finite group.

最后，我们引入了一种广义非初等群，发现〓变换群经典的离散准则对我们研究的非初等群只是有条件成立，我们找到了充要条件对其建立了离散准则。

In Chapter 2,we first generalize a waterman inequality by usering Clliffordmatrix represenation of n-dimensional 〓 transformation group 〓.

在第二章中，我们研究了关于离散群的一些不等式。首先，我们利用CHifford矩阵研究了〓上的〓变换群不等式，给以一定的限制条件，通过大量复杂的、技巧性计算，改进了Wateman不等式。

Wehave obtained two formulas to express thire relation in different view;at the same time,wegive an explicit description of multiplicative unitary operators corresponding to compactquantum group 〓 and 〓 on concrete Hilbert spaces.

我们首先在第四章讨论了紧量子群对应的乘法酉算子和紧量子群与离散群的交叉积对应乘法酉算子的关系，我们得到了在不同观点下的它们之间的关系式；同时给出了紧量子群〓对应的乘法酉算子和〓对应的乘法酉算子在具体的Hilbert空间上它们之间的表达式。

In chapter 4, we consider the ergodic properties of group actions.

第三章，考虑离散群的混沌作用。

Next,we obtain several discrete criteria and algebraic limit theorems forMartin nonelementary subgroups of I som.

首先，我们证明了Martin非初等群真包含Bowditch非初等群，但是，对离散群，它们是等价的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。