This paper deals with the multiple phase screen mathematical model and simulation of radio signal propagation in the atmosphere.
采用多相位屏的数学模型，数值模拟无线电信号在大气中的传播过程。
On the basis of sieve analysis for the formation sand, through the simulation experiments of sand production, the sieve-opening sine of premium screen pipe for sand control was determined.
在分析地层砂粒度分布的基础上，通过室内出砂模拟实验，确定了该油田各油层的防砂筛管挡砂精度。
Visual flight simulation system combines three-dimensional computer graphics animation with flight numerical simulation for depicting flight process of Unmanned Air Vehicle (UAV) on computer screen.
飞行可视化仿真系统采用计算机三维图形动画与飞行数值仿真相结合的设计方法，在计算机屏幕上再现无人机的飞行过程。
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