DDA

Described the principle of 2-D discontinuous deformation analysis ( DDA ) and the numerical model of bolt.

阐述了二维非连续变形分析方法 ( DDA ) 与锚杆数值模型的基本原理,开发了考虑锚杆单元的DDA程序.

Second, the DDA method is used to study the scattering and polarization property of randomly distribution aggregation particles, and the angle distributions of Muller scattering matrix element under different conditions are elicited.

研究了随机分布的簇团粒子的散射特性和极化特性，给出了Muller散射矩阵元在不同情况下的角分布；

Not only DDA operates sum of products as quickly as distributed arithmetic, but also provides an effective method to realize coefficient programmable FIR filter.

该算法不仅继承了分布式算法提高乘积和计算速度的优点，还为系数可编程FIR滤波器的实现提供了有效的解决方案。

A study on the numerical model of DDA and its preliminary application to rock engineering

DDA数值模型及其在岩体工程上的初步应用研究

Acidic bentonite used as catalyst to prepare new type antioxidant DDA

以酸性膨润土为催化剂制备新型抗氧剂DDA

A: Dda, will you take me to the Capital Museum?

爸, 你带我去首都博物馆 吧 ?

The general principle of DDA, discontinuous deformation analysis, and the shear strength reduction are discussed simply.

介绍了非连续变形分析(DDA)方法和强度折减法的基本理论, 提出了基于DDA的强度折减法求土坡安全系数的方法.

Traditionally discontinuous deformation analysis ( DDA ) method adopts linear displacement mode, which has many defects.

传统的非连续变形分析法 ( DDA ) 采用线性位移模式存在诸多缺陷.

This paper uses Discontinuous Deformation Analysis ( DDA) to analyse the dynamic stability of a rock slope slide.

本文用块体系统非连续变形分析（DDA）方法，对岩石滑坡体进行动态稳定分析。

In addition, considering that DDA could accurately solve the tangential sliding force, the reasonable factor of safety could be obtained by combining strength reduction method.

同时，鉴于DDA方法能够精确地求解切向滑动力，结合强度折减法能够获得比较合理的安全系数。

Application of DDA method in stability analysis of topple rock slope

DDA数值方法在岩质边坡倾倒破坏分析中的应用

Effect of cohesion on evaluating slope stability factor of safety by DDA method

DDA法计算边坡安全系数的黏聚力影响分析

A Dynamic Distributed Arithmetic ( DDA) is put forword based on the theory of signed distributed arithmetic.

基于有符号数分布式算法原理，提出了动态分布式算法。

One approach you could consider using to develop a share portfolio is based on the Dow dividend approach ( DDA), a purely mechanical way of constructing a share portfolio.

一种办法可以考虑使用建立一个股票组合，是道指成份股分红办法（DDA）的，是构建股票组合为基础的纯机械的方式。

A DDA arc interpolator for digital differential analyzer based on FPGA

基于FPGA的数控数字积分法圆弧插补器的设计与实现

An Analysis of Destabilizing Pattern and Mechanism of Rock-Anchored Crane Beam by DDA

用非连续变形法分析岩锚吊车梁失稳形式及机理

Now the study on three dimensional DDA is only in the inchoate stage. In the thesis, the forward analysis model of three dimensional discontinuous deformation was established and several main kinds of contact have been discussed in detail and corresponding DDA programs are developed.

目前三维非连续变形分析方法的研究尚在初步阶段，本文从最小势能原理出发建立了三维DDA正分析模型，重点讨论了三维块体系统中几种主要接触形式，编制了相应的DDA程序。

An approach for modeling rock crack propagation using discontinuous deformation analysis DDA method is presented.

提出一种用非连续变形分析方法模拟岩石裂纹扩展的方法.

Kernel function is applied in PCA and DDA, so the linear discriminance method is dislinearized.

在主分量分析方法以及线性判别式方法中,引入核函数, 使得原来的线性判别方法非线性化.

We direct APEC Ministers Responsible for Trade to use the2012 meeting in Kazan to assess ways to promote progress on the DDA in the WTO.

我们指示负责贸易事务的亚太经合组织部长（APEC Ministers Responsible for Trade）利用2012年的喀山（Kazan）会议，评估在世贸组织推动多哈发展议程取得进展的途径。

This paper analyzes extended DDA circle interpolation method.

本文分析了扩展的DDA园弧插补方法,给出了终判公式.

Therefore enabling developing members to genuinely benefit from the negotiations essentially safeguards the success of DDA.

使发展中成员真正从谈判中受益,是多哈发展议程取得成功的基本保障.

DDA was launched under the WTO in November 2001 and involves all 148 WTO countries. Mr.

多哈发展议程在2001年11月由世贸组织发起,涉及148个世贸成员国.

Unfortunately the armed forces are still exempt from the DDA.

不幸的是,《残疾人歧视法案》仍然不适用于陆海空三军.

The two classes of planar curve generation are DDA ( digital differential analyzer) and DCM ( displacement comparison method).

平面曲线的生成算法主要有DDA（数学微分分析器）和DCM（位移比较法）。