By the extended DDA method, the failure process of a tunnel in Japan is simulated.
的扩展dda方法，在日本隧道的破坏过程进行了模拟。
Abstract Based on three-dimensional DDA method, a simple three-dimension model was proposed to analyze rockbolting and the corresponding algorithm and formulas were given.
摘要：提出了三维非连续变形分析方法中锚杆的简化模型，给出了相应的算法和公式。
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。
This paper analyzes extended DDA circle interpolation method. Judge of termical point formula is given.
本文分析了扩展的DDA园弧插补方法，给出了终判公式。
Based on studying the way of polar moment of inertia, a new method of major and minor axis detecting by DDA was provided.
特征提取是葡萄干等级检测的基础，该文在研究极惯性矩计算长短轴方法的基础上，提出一种利用数值微分法进行长短轴检测的新方法。
In this paper, on the basis of several discontinuous deformation analysis methods, DDA (discontinuous deformation analysis) method was researched mainly.
本文在对各种非连续变形分析方法进行比较性介绍的基础上，选择其中的DDA方法进行了着重研究。
The main research works and conclusions are as following:1. Optical properties of different shape metal nanoparticles are simulated by the discrete dipole approximation (DDA) method.
本论文的研究工作和成果如下：1。利用离散偶极子近似方法研究了不同形状纳米金属颗粒的光学性质；
Among all the numerical analysis methods, the Discontinuous Deformation analysis (DDA) method is an efficient method with high accuracy.
在解决岩土工程非连续变形问题的数值方法中，非连续变形分析方法(DDA)无疑是一种高效、精确的算法。
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.
此外，考虑到DDA可以准确解决的切线的滑动力，合理的安全系数可以通过以下方式获得结合强度降低的方法。
Only if the method of discontinuous deformation analysis (DDA) is used, the discontinuity nature of rock mass can be concretely displayed.
用非连续变形分析方法研究岩体的非连续特性才能得到微观的具体反映。
Apply CPU of dual cores and advanced DDA curves and strait lines calculating method to assure better quality.
采用双核CPU技术和先进的DDA曲、直线插补算法，使加工的产品质量更好。
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）。
Detection of contacts between 3d blocks is a key problem in 3d DDA (discontinuous deformation analysis) and DEM (discrete element method) analysis.
在三维单元法、三维不连续变形分析法中，三维块体的接触判断是关键的问题之一。
Detection of contacts between 3d blocks is a key problem in 3d DDA (discontinuous deformation analysis) and DEM (discrete element method) analysis.
在三维单元法、三维不连续变形分析法中，三维块体的接触判断是关键的问题之一。
应用推荐