塑料模壳适用于混凝土密肋楼盖的模板，对IC厂房无尘车间开孔密肋楼盖可拆式模壳技术进行系统阐述，并探讨施工要点及其控制方法。
Authors expound plastic formwork technology for open waffle slab of clean room in IC workshop systematically, and discuss the key problems in construction and controlling method.
通过对系杆拱桥作用在拱肋上的荷载性质进行了分析，采用能量法推导出无横撑下承式系杆拱桥侧倾稳定临界荷载的一般公式。
Using energy method, the general formula for calculation of lateral stability of through bowstring tied arch bridge without transverse beams given.
通过对系杆拱桥作用在拱肋上的荷载性质进行了分析，采用能量法推导出无横撑下承式系杆拱桥侧倾稳定临界荷载的一般公式。
With the background of lateral stability of non-range-spacer through bowstring arch, analytical approximations are derived in this paper using energy variational approach.
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