地震

The 1-4 order variation law of frequency, energy and distance of MS events before destabilizing can display the change rule of MS events. According to the variation law of the difference of frequency, energy and distance of micro seismic events before destabilizing, the fracture of rock mass can be precisely predicted. This is of great importance for safety of colliery.

微地震事件的距离、能量、频数的一到四阶差分均能够显示微地震事件的变化规律，根据未失稳岩体微震事件距离、频数、能量差分变化规律，能够准确地利用微震监测技术预报岩体破裂，这对于采用微地震监测技术解决矿山井下岩体破坏失稳预报具有重要指导意义。

The results indicate that the previous events in shallow earthquake doublets do have "triggering" effect on the following event, but the effect is very weak.

这表明(1)浅源"地震对"前面地震事件产生的静态库仑破裂应力变化确实对后续地震有一定的"触发"作用，但这种"触发"作用很小。

The damage assessment of structures is based on the earthquake damage criteria and damage model. The author in the text, through the existing description of earthquake damage criteria and damage model, believes that the actual earthquake damage can be showed by the dual damage criteria on the basis of deformation and energy.

结构的地震破坏评估是建立在地震破坏准则和破坏模型基础上的，本文在对己有的地震破坏准则和破坏模型进行评述的基础上，认为基于变形和能量的双重破坏准则可较好地反映结构的实际震害，并根据倒塌极限状态方程提出了改进的 Park＆Aug。

Deconvolvtion is used to eliminate effects of ghost multirefluction earth filtering when seismic secondary wave spreading. Deconvolution is a special way to eliminate these factors.

地震资料的反褶积处理是针对地震激发子波在传播过程中受虚反射、层间多次和大地滤波等影响，专门用于消除这些因素对地震子波改造的一种处理方法。

After introducing the mechanism of seismic displacement control with dampers, 3 kinds of assessment functions for seismic response control effect are formulated based on the seismic response characteristics of longspan suspension bridges and a new optimal placement method of dampers using penalty function and first order optimization theory is proposed.

从地震位移控制的原理出发，根据大跨悬索桥结构地震响应的特点，建立了其地震位移控制效果的3种评估函数，提出了一种基于罚函数和一阶优化原理的阻尼器最优布置方法。

Through statistical analysis, it is demonstrated that the precursory wave related to the quiescent foreshock is more universal than the foreshocks.

统计表明，与寂静地震有关的前驱波比前震有更大的普遍性，出现的时间主要集中在主震前 7天之内，从一部分中等地震到特大地震之前都已观测到前驱波，这就说明大的脆性破裂之前，较小的缓慢破裂在自然界是存在的而且比较普遍。

The types of sequences and features of foreshock and aftershock activities of 18 MS≥5.0 earthquakes since 1970 along Qilian—Haiyuan seismic zone are studied.The space distribution of types of the sequences along the zone is analyzed.

研究了1970年以来发生于祁连—海原地震带的18次中强地震序列特征，在此基础上确定了地震序列类型，研究了各种类型地震序列的分布规律。

Based on VHZ data recorded by 7 stations of China digital seismograph network for Nov. 14, 2001, earthquake in the west of the Kunlun mountain pass, we extracted spherical mode of 0S4-0S76 of the earth free oscillation using power spectral density estimation. Because the frequency response of seismograph in China digital seismograph network suppress information of solid tide, we do not need to remove the solid tide in our procession.

利用中国数字地震台网改造后的7个台站的VHZ波形资料，采用功率谱密度估计方法，利用中国数字地震台网地震仪对低频信号压制的特点，在没有对资料去除固体潮影响的情况下，提取了2001年11月14日昆仑山口西地震激发的0S4-0S76地球球型自由振荡，并与地球初步参考模型的理论自由振荡周期进行对比，结果表明与PREM预测的球型自由振荡周期符合得很好。

This report involves our research works in the fields of coseismic earthquake stress triggering, fault activities, free oscillation of the earth, precursory changes prior to earthquakes and earthquake forecast.

本研究报告涉及同震应力触发地震、断层活动、地球自由振荡、地震前兆和地震预报等多方面，但是钻孔应力-应变观测是贯穿其中的主线。

On the basis of historical seismic data, process of earthquake recurrence on three connecting fault segments of the Shanxi graben system and their relations to the 1303 earthquake with M=8.0 are analyzed in this paper.

根据历史地震资料分析了山西断陷带中3个相连接断裂段的地震复发过程及其与1303年8级地震的联系。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。