The discrete event system simulation was used to verify the validity of the trunk group model.
为了证明模型的有效性，作者利用离散事件系统仿真的方法对模型进行了验证。
In a TDMA system, a discrete group of digits transmitted by a single''.
在时分多址系统中，由地面站传送的一个分立数字组。
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。
A preliminary description is put forward on the relationship between the dyadic additive group and discrete Walsh function.
本文也初步提出了有关并元加性群与离散Walsh函数之间的一些内在联系。
Finite Element Method is an important means of engineering subject and has been proved to be a common method in many subjects. However, disadvantages still remained. During the structural analysis, large amount of high-order units were used in order to ensure the precision of arithmetic solution when using Finite Element Method to do discrete processing. This will cause high order of coefficient matrix of corresponding equation group.
有限元方法是工程学科的重要工具，被证明为在许多科学和工程领域中连续物理系统模拟的一种普遍方法，但缺点是随着工程结构分析问题越来越复杂，在结构分析中，为保证数值解的精度，在使用有限元方法离散处理时，往往要用大量的高阶单元将结构剖分得很密，这时相应的代数方程组的系数矩阵的阶数很高，即使用目前速度最快的串行机来进行求解，费时仍然太多且问题的规模受到内存容量的限制。
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。
Based on the identification scheme, the security of the discrete logarithmic problem and the one-way function, this paper proposes a new threshold proxy signature scheme without the cooperation of the Original Signer, and or more proxy signers form a designated group of proxy signers which can generate proxy signatures.
基于身份识别、离散对数问题和安全的单向函数，提出了一个无需原始签名人的门限代理签名方案，使得任意t个或更多个代理签名人可以合作产生对消息的代理签名。
Based on the analysis of worms propagation in a close computer group, a new discrete worms propagation model is presented and compared with the real propagation data collected by CAIDA, it is found that the model reflects properly the active role of worms propagation.
分析了蠕虫病毒在一个封闭的计算机群中传播的过程，提出了一个离散的蠕虫传播模型，并且把该模型和Code Red v2蠕虫的真实传播数据进行了比较，通过比较发现该模型较好地反映了随机扫描蠕虫的传播规律。
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。
In GIS and cartology, the boundary searching of discrete object group is an important problem. The traditional algorithm is based on vector data.
搜索离散目标群的边界是地界信息系统和地图学中一个重要问题，传统的算法是基于矢量数据的。
In the proposed algorithm, the solutions of multi-objective function are mapped as different points in multi-dimension space and by use of Euclidean distances between these points and ideal point it is judged that which one of these solutions are superior as well as which ones are inferior; meanwhile according to the features of optimal reactive power flow, chaos optimization algorithm and immune algorithm, it is put forward that in the remember antibody group in which the IA is used to optimize the reactive power flow, the continuous variables and discrete variables are alternatively optimized and solved by means of COA as well as interlace operation and mutation operation of IA, and applying these solutions to reactive power optimization aim at reducing active power loss, improving voltage stability margin and decreasing voltage deviation.
针对目前评价多目标函数解的不足，提出了将多目标函数各个解映射成多维空间中不同的点，利用这些点与理想点之间的欧氏距离来衡量各个解的优劣；同时针对无功优化、混沌优化算法和免疫算法的特点，提出了在采用免疫算法进行无功优化的记忆抗体群中，运用混沌优化方法和免疫算法的交叉和变异等操作对无功优化的连续变量和离散变量进行交替优化求解，并将它们运用于以降低有功损耗，提高电压稳定裕度及减小电压偏移为目标的无功优化中；通过
The GKS stability theorem for one-dimensional model of hyperbolic initial and boundary value problem, Trefethen's explanation and extension based on the concept of group velocity are generalized firstly. Another possible high-frequency instability mechanism in numerical realization of MTF is pointed out based on his explanation and extension, namely, coupling effect of outgoing harmonic wave along one direction and node motion in the other directions can reverse the energy propagation in multi-dimensional discrete grids.
本文概述了—维双曲型偏微分方程组初边值问题数值稳定性的GKS定理及Trefethen基于群速度概念对这一定理的解释和推广；并应用Trefethen的解释和推广指出了MTF在数值实现中可能出现的另一种高频失稳机制，即在多维离散网格中，沿某一空间方向的外行简谐波，由于与其他空间方向节点运动的耦合效应可以使能量传播方向反向。
The base using elliptic curves as public-key cryptosystem is that because the points set of elliptic curve on finite field can form Abelian group. By this, the discrete logarithm on elliptic curve can be defined.
使用椭圆曲线作为公钥密码体制的基础是由于定义在有限域上的椭圆曲线上的点的集合可构成阿贝尔群，由此可定义其上的离散对数，即椭圆离散对数。
Based on the dyadic additive group and the properties of discrete Walsh function, a simple and effective method for processing a discrete signal in time domain is presented.
基于并元（dyadic）加性群与离散的Walsh函数特性，本文提出了一种较简便的离散信号时域处理方法。
The conical limit set of convergence group is studied and that and the Lebesgue measure of the conical limit set is equal to zero when the Poincare series of discrete convergence group converge is proved.
研究了一般收敛群的锥形极限集，并证明了当离散收敛群的Poincare级数收敛时，其锥形极限集的Lebesgue测度为零。
The basic idea of the finite element method is to solve the region contiguous to a group of a finite number of discrete and interconnected by a certain way with the unit.
有限元法的基本思想是将连续的求解区域离散为一组有限个且按一定方式相互连接在一起的单元。
These discrete points are used as control points for interpolation and fitting, forming a group of curves, then a method that draws up to match the cloud is adopted fitted to form an ideal surface of the bone.
对股骨头点云通过插值、拟合等方法生成曲线，再采用分片拟合的方法拟合形成骨骼的理想表面。
Thirdly, we explained the fundamental concepts and properties of authorized group signature in detail and propounded a secure authorized group signature based upon the discrete logarithm.
同时还对授权群签名的基本概念和必须满足的基本性质进行了详细说明，并且基于离散对数问题给出一个安全的授权群签名方案；
Although, the average impact test of majority region is greater than 27J, but there are a group of date (three impact specimens) discrete highly, estimated that concerning with superimposed ultrasonic echo effect " beat " in small-scale rigid body.
尽管在冲击试验总平均值上，大多数区域达到大于27J的水平，但在一组（3个冲击试样）数据内的离散性很大，估计与小尺度刚体内超声波回波叠加效应-拍有关。
Discrete Fourier Transform (DFT) is used to realize the coherent integration, which improves the relative ambiguous frequency estimation precision of coherent pulse group. This algorithm has low computational complexity and high estimation precision for Doppler frequency rate-of-change.
针对单载频雷达脉冲信号，提出了基于相关的脉冲群间多普勒频率变化率高精度估计算法，通过离散傅立叶变换实现了相参积累，提高了相参脉冲群相对模糊频率估计精度。