The utility model discloses a tower self-closing umbrella which is a semiautomatic umbrella with a tower shape.
宝塔自关伞是一种外形似塔的半自动伞。
The tower shape is optimized by nonlinear programming method. An hierarchical algorithm for the tower shape optimum is given.
应用非线性规划法对铁塔进行形状优化，给出了铁塔在多工况、多约束条件下形状优化的一种分层算法。
The tower shape is optimized by nonlinear programming method. An hierarchical algorithm for the tower shape optimum is given.
应用非线性规划法对铁塔进行形状优化，给出了铁塔在多工况、多约束条件下形状优化的一种分层算法。
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