利用等效弹性法分析了压电矩形共振器的二维耦合振动，导出了振子共振频率的解析表达式。
Based on the equivalent elasticity method, the plane coupling vibration of a rectangular piezoelectric ceramic plate was studied and the resonant frequency equation was derived out.
因此，开展对二维矩形件优化排样问题的研究具有重要的理论意义和工程应用价值。
Therefore, research on the problem of two-dimensional optimal layout for rectangular parts is very important in theory and applications.
本文的兴趣集中在二维矩形腔体中混合流体对流场的结构方面。
Our interests focus on the structures of convection fields for binary fluid mixtures in two dimensional rectangular cell.
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