The theoretical method for calculating the absorption coefficient of the absorber is provided by analogying the acoustic field in a tube with varying cross section.
对尖劈型吸声材料用类比变截面管道的声场理论，给出了计算其吸声系数的一种方法；
The dynamic response of unbalanced single disc rotor is analysed and theoretical aspects of flexible rotor balancing by the influence coefficient method are studied.
本文是从分析挠性转子的不平衡单质量的动态响应出发，找出用影响系数法平衡挠性转子的理论依据。
It gives a definite method of penalty coefficient and contributes workable theoretical grounds to the policy decision departments for defining reasonable penalty coefficient preventing tax evasion.
具体指出罚款系数的确定方法，为税务决策部门针对偷骗税行为制定合理的罚款系数提供了可操作的理论依据。
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