采用最优性准则方法，给合结构优化设计中的双因子算法，有效地解决了给定弹性机构某几阶固有频率时设计构件截面参数这类逆特征值问题。
Combining with the optimality criterion method and the bi-factor algorithm, the inverse eigenvalue problem for optimal Parameters design of elastic mechanisms is solved effectively.
根据问题的最优性和可行性提出一新的区域删除准则以排除问题（P）的可行域中不存在全局最优解的部分，结合区域删除准则和分支定界理论给出新算法。
New region-deleting principles are proposed based on the optimality and feasibility of the problem so as to delete the subregion without containing the optimal solutions of the problem(P).
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