The stiffness analysis was investigated with the geometric relations of deployment and stowage.And the local and whole stability analyses were also studied with stability theory. 根據展開和收攏幾何特性關係，對其剛度特性進行了分析，並依據彈性穩定理論，對該展開機構進行了局部和整體穩定性分析。
The fractal dimension is one of the geometric characteristics of microcellular structure of foamed PP and exhibits the foamability of PP under a certain foaming condition. 分形維數是發泡聚丙烯微孔結構的幾何特性之一，體現了聚丙烯在特定條件下的發泡能力。
