Simulation exercises Haicang District know in advance will be subject to enemy air raids, Haicang District Civil defense command center ordered the sounding of air defense early warning.
演练模拟海沧区预先知道将受敌空袭，海沧区民防指挥所下令拉响防空袭预先警报。
Experimental simulation is made, and the result indicates that the algorithm is feasible and effective and it can improve accuracy of congestion early warning and reduce false alarm rate.
仿真结果表明：该方法是可行有效的，可改善拥堵预警的准确率并减少误报率。
Terrain defilade is a key factor for early warning system (EWS) in detecting low altitude targets, effective algorithm provides the foundation of operational simulation.
地形遮蔽是影响预警探测系统发现目标能力的关键因素。有效算法是实施模拟仿真的基础。
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