Therefore, the research on topology optimization of structures with discrete variables has important theoretic significance and actual significance.

因此，离散变量结构拓扑优化的研究具有重要的理论和实际意义。

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This paper studied antenna structures discrete variables optimum design under multiple loading conditions in accordance with the complexity of antenna structure.

针对天线结构受载及工作状态的复杂性，研究了天线结构的多工况离散变量优化设计问题。

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