spaced centers

The new seismic hazard analysis model is based on the magnitude and the interval of earthquake and the epicentral distance.

以地震震级、震中距和时间间隔的统计概率规律为基础,建立了考虑地震发生的时空不均匀性且不需要事先假定确定的地震发生模型和根据大量区域地震地质资料划分潜在震源区的地震危险性分析模型。

For pass through the low velocity zone,the S wave of earthquakes with epicentral distance of 9°~36° are weak,so the LG wave are used to determine the epicentral distance of the earthquake in shadow area of S wave.

由于来自震中距9°～36°的地震经过了低速层,造成了S波不发育。

Based on the above results,we analyzed the residual distribution with azimuthe and epicenter distance,discussed,from the viewpoints of the equilibrium of nonstatic forces and the earth surface structure,the reason why those residuals exist,and proposed the average correction for different regions,by which the precision of event locations can be improved.

在此基础上分析各台所记录的所有地震事件的残差随方位角和震中距的分布，及产生这些残差的地球深部非流体静力平衡状态和地球表面构造等方面的原因，并给出了不同区域地震走时的平均校正值，从而提高了地震定位精度。

It has discu ssed the application in middle distance of threshold of individual lactic acid, so offering physiologic basis for middle distance sport train.

从运动生理学角度分析中距离跑训练的本质和生理特点 ,揭示运动训练对生理机能的影响 ,个体乳酸阈在中距离跑中的应用 ,为中距离跑运动训练提供生理学依据 。