Pipes and cable trays are not hidden and most of ventilation and cooling is done through semi-passive systems.
管道和电缆架没有进行埋线，大部分的通风和制冷设施通过半被动式系统完成。
2
In this paper, the control effects of three kinds of measures, including active, passive and semi-active control, for structural seismic control are compared and analyzed.
本文对结构抗震控制的主动控制、被动控制和半主动控制等三类控制措施的控制效果进行了比较与分析。
3
The wind-induced and seismic vibration control of high-rise truss tower using passive and intelligent semi-active dampers are systematically studied in this paper.