分别建立雷达电磁波在干涉区、中间区和绕射区传播的数学模型和它们适用的边界条件。
The mathematical models and their limitative condition of radar electromagnetic wave propagated in interference region, intermediate region and diffraction region are set up respectively.
地铁站台的气流流动属湍流流动，采用CFD对站台通风方式进行模拟时需要确定相关的边界条件和适用的湍流模型。
Airflow in underground railway station platforms is turbulent. Boundary conditions and proper turbulence model are required to determine when adopting CFD to simulate platform ventilation.
该模型可适用于不规则边界河道的数值模拟。
This model can be used to the numerical simulation of anomalistic river boundary.
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