The feed structure is analyzed by a combined method of FEM based on the weak form of Helmholtz equations and mode expansion method.
本文将基于Helmholtz方程弱形式的有限元法与场的模式展开结合,对结构进行分析计算。
参考来源 - 毫米波径向线缝隙天线馈源结构分析·2,447,543篇论文数据，部分数据来源于NoteExpress
光束模式展开法可用于近似计算远场的弱截断光束。
The beam expansion method is suited to approximate the weakly truncated beams in the far field.
因此论文对逆向供应链合作模式展开研究具有重要的理论意义和实用价值。
Therefore in this paper, the writer has important theoretical and practical value to the study of the reverse supply chain cooperation model.
本文就第三方物流企业的运营模式展开研究，希望能给物流企业提供一个参考。
This article launches the research on the third party physical distribution enterprise's operation pattern, hoped that can give the physical distribution enterprise to provide a reference.
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