通过引入周期性边界条件，在立方体单元内模拟混凝土中集料和界面的分布。
By introducing periodic boundary conditions, the distribution of aggregates and ITZs in concrete is simulated within a cubic element.
为了充分考虑旋翼尾迹对流场的影响，采用周期性边界条件和由动量理论导出的远场边界条件。
To incorporate the important effects of the rotor wake, the far-field boundary condition derived from the rotor momentum theory and the cyclic boundary condition have been used.
我们用离散元(DEM)方法研究了这种运输机在水平配置时的流动机制，施加周期性边界条件并忽略流动介质的存在。
We investigate the flow mechanism of this conveyor in a horizontal configuration by a discrete element method (DEM), applying a periodic boundary and omitting the existence of fluid medium.
上面的方法不能用于负载特性分析，原因在于不能确定周期性的边界条件。
However, this approach cannot be used for analysis of load characteristics because it proves impossible to specify periodic boundary conditions.
慢波系统一般采用周期性结构，其中传输的电磁波需要满足十分复杂的边界条件。
Slow-wave systems generally employ periodic structures, and the electromagnetic waves transmitted therein are required to satisfy very complicated boundary conditions.
滑移边界条件下的模拟结果具有良好的周期性，各个周期的过渡性也更加平滑，与实际情况更加接近。
The simulation has good period property, the transition between each period is more smooth and is more close to the real result.
该模型由描述系统振动的双曲型偏微分方程组及相应的边界条件和周期性条件组成。
This model consists the hyperbolic partial differential equations, boundary conditions and cyclical conditions of the system.
该模型由描述系统振动的双曲型偏微分方程组及相应的边界条件和周期性条件组成。
This model consists the hyperbolic partial differential equations, boundary conditions and cyclical conditions of the system.
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