Therefore it is considered that the decrement of gravity vertical gradient is caused by mountain mass distribution.
分析了佘山重力垂直梯度偏小的原因，认为这是由于山体质量分布引起的。
The decrement of higher modal response of the rotor system is lost when damper mass-factor exceeds a limiting range.
当质量参数超出某有效区间时，系统将失去对高阶模态响应的衰减作用。
This paper presents the field estimation on rock mass quality by means of vibrational decrement.
本文介绍了一种在现场用振动衰减系数来估计岩体质量的新方法。
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