As the intensity index of ground motion, PGA (peak ground acceleration) is often employed and analyzed.
作为地震动强度指标，峰值加速度一直是研究最多的物理量。
The power spectral density function of ground acceleration can be described as filtered white noise applied on each support point.
地面运动加速度功率谱模型为零均值的平稳高斯过程，描述为过滤白噪声施加于支撑各点。
The ground acceleration here must have been very high and the duration of the strong motion long to cause such incredible destruction.
当时地表加速度一定很高，而且强烈震动的时间很长，造成了如此严重的破坏。
The method proposed by Panza(1999)was used in the calculation to obtain the distribution map of the maximum ground motion and design ground acceleration(DGA).
计算获得了华北地区最大地面运动和设计地面加速度（DGA）的分布图。
The in-situ measurement includes:( 1 ) the ground acceleration due to horizontal vibrating force caused by the vibroflot and its variation with the distance from the vibrating center;
现场试验包括：①测定振冲器水平振动力作用下产生的地面加速度以及制桩时引起的地面加速度与距振点距离之间的关系；
Its power spectral model is the twice-filtered white noise model. Moreover, the relation between the power spectral intensity and the mean value of maximum ground acceleration is set up.
地震地面运动功率谱模型采用两次过滤白噪声模型，建立了地震地面运动谱强度与最大加速度均值之间的关系。
Peak ground acceleration, or shaking, caused by Friday's earthquake was nearly double—at its epicenter—than what the Fukushima Daiichi plant, 110 miles (172 km) away, was built to withstand.
星期五地震震中的峰值地面加速度或者振动接近距离震中110英里（172公里）的福岛第一核电站设计承受能力的2倍。
Peak ground acceleration, or shaking, caused by Friday's earthquake was nearly double—at its epicenter—than what the Fukushima Daiichi plant, 110 miles (172 km) away, was built to withstand.
星期五地震震中的峰值地面加速度或者振动接近距离震中110英里（172公里）的福岛第一核电站设计承受能力的2倍。
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