Study Design. A retrospective matched cohort study with control group.
研究设计：对照配对回顾性队列研究。
At last, we introduce the design of elevator group control software and the effect of a real elevator group control system.
最后阐述了电梯群控软件的设计以及开发的电梯群控系统在实际使用中的效果。
Design: Complete randomized group division and control experiment were designed.
设计完全随机分组设计，对照实验。
Design: Complete randomized group division and control experiment were designed.
设计完全随机分组设计，对照实验。
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