放松限制的目标函数(不将决策变量当作整数考虑)的优化值同时也给出来了。

The optimal value of the relaxed objective function (the one that didn't consider the decision variables as integers) is also printed here.

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该结构优化问题的决策变量采用了向量表示方法，建立0-1整数非线性规划模型，给出了可行解存在性的判定方法。

Expressing decision variables of the structure optimization problem in the form of vector, a 0-1 integer nonlinear programming model is presented.

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对上层变量为整数型的两层决策问题，在确定移动集、构造禁忌表的基础上，提出了禁忌搜索解法。

In this paper, based on the determined move set and structured tabu list, tabu search technique is used to solve the bilevel decision making problem with integer variables in the upper level.

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