In this paper, the reactance silencer with axis symmetry is analyzed in finite element method so as to establish a mathematic model for the programming of calculation of the trans-mission loss.
通过对轴对称抗式消声器进行有限元分析，建立其数学模型，对传递损失编制程序计算。
Eukaryotic gene cis-acting element includes the promoter, enhancer, silencer, which are the specific DNA sequences regulating gene transcription.
真核生物基因顺式作用元件分为启动子、增强子、沉默子，是调节基因转录的特定DNA序列。
Eukaryotic gene cis-acting element includes the promoter, enhancer, silencer, which are the specific DNA sequences regulating gene transcription.
真核生物基因顺式作用元件分为启动子、增强子、沉默子，是调节基因转录的特定DNA序列。
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