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1)  3D deformable distinct element method(3DEM)
离散元(DEM)
2)  Distinct Element Method(DEM)
离散单元法(DEM)
3)  DEM (Discrete Element Method)
DEM(散体单元法)
4)  discrete element method
离散元法
1.
Application of discrete element method to research and design of working parts of agricultural machines;
离散元法及其在农业机械工作部件研究与设计中的应用
2.
A discrete element method was developed to simulate mixing of elastic materials with the predictions compared to fall-off mixing tests of plastic balls.
为了现实有效地离散弹性体材料拌合的数值模拟,采用离散元法,开发了离散弹性体材料拌合离散元模拟系统。
3.
Base on the basic principles of discrete element method(DEM),A two dimensional DEM emulator named SieveDEM was developed by a VC++.
基于颗粒离散元法的基本原理,采用VC++。
5)  DEM
离散元
1.
Top Coal Caving Rule Research of Horizontal Section Caving in Deeply Inclined Coal Seam with DEM Simulation;
急倾斜水平分段放顶煤放煤规律的离散元模拟研究
2.
Experimental Investigation and DEM Simulation of Mass Mixing under Shock Loading;
冲击下材料质量混合的实验研究及离散元模拟
3.
STOCHASTIC MODELAND NUMERICAL SIMULATION FOR DISCONTINUOUS JOINTED ROCK MASS USING 3D DEM;
断续节理岩体随机模型三维离散元数值模拟
6)  distinct element
离散元
1.
Numerical modelling and analysis of distinct element on bolt reinforced coal pillar in partial extraction;
锚杆加固条带煤柱的离散元模拟分析
2.
Aiming at the characteristics of large falling height and complex falling configuration in full-mechanized caving mining,three-dimensional distinct element code-3DEC is employed to simulate falling rules of surrounding rock in gob,movement direction of rock beam and possible dynamic loading brought by it with different collapse geometry parameters in full-mechanized caving mining face.
基于综放开采,采空区冒落高度大、冒落形态复杂的特征,采用三维离散元程序3DEC模拟分析了综放工作面岩层不同垮断几何参数时的采空区覆岩冒落规律、岩梁运动趋势及其对采场可能带来的动载荷。
3.
Beside three dimensional distinct element code.
采用三维离散元数值模拟,重点分析了这类边坡在开挖过程中缓倾角结构面的倾角变化、连通率变化对这种阶梯状滑动的影响。
补充资料:离散时间周期序列的离散傅里叶级数表示
       (1)
  式中χ((n))N为一离散时间周期序列,其周期为N点,即
  式中r为任意整数。X((k))N为频域周期序列,其周期亦为N点,即X(k)=X(k+lN),式中l为任意整数。
  
  从式(1)可导出已知X((k))N求χ((n))N的关系
   (2)
  式(1)和式(2)称为离散傅里叶级数对。
  
  当离散时间周期序列整体向左移位m时,移位后的序列为χ((n+m))N,如果χ((n))N的离散傅里叶级数(DFS)表示为,则χ((n+m))N的DFS表示为
  

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