Multi-level velocity mode is an important feature of the advanced elevator, and the simulation of elevator running is the primary part of the elevator group control research.
多速度模式运行是现代中高速电梯的重要特征，而运行仿真是电梯群控仿真研究的基本环节。
In this paper, the multi-level wind velocity in the nocturnal steady state PBL is analysed, using the data of the 325 meter meteorological tower and acoustic sounder.
本文利用325米气象塔及声雷达探测资料分析了夜间平稳天气条件下行星边界层中风速出现多极值的现象。
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