In this paper, an evolutionary optimization method is proposed to minimaze the weight of truss structure in terms of nodal coordinates and element cross sectional areas.
提出了一种渐进优化方法，通过分离设计变量，分别采用渐进节点移动法和满应力法优化桁架结构的形状和尺寸。
A new on-line calculation method for billet weight by measuring its cross section was presented, and cut-by-weight of billets could be realized by this method.
提出了一种通过测量方坯截面面积在线计算方坯质量的方法，通过该方法可以实现方坯的定重剪切。
By the method of free-radical polymerization in solution, cross-linked copolymer of sodium acrylate and acrylic acid of super-high molecular weight.
采用自由基水溶液聚合方法合成了超高分子量的丙烯酸(钠)聚合物。
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