地震

An analytical expression is presented based on total probability theory to describe the mean annual rate of structural performance level reaching or exceeding a specific limit state, and the analytical solutions are adopted to analyze the seismic risk of a three-span rigid-frame bridge in a specific hazard environment.

六、在全概率理论的基础上推导了结构在特定地震危险性水平下的年平均达到或超过指定极限状态的概率的解析表达式，并用此解析表达式对一个三跨连续刚构桥结构进行了在特定地震环境下的地震危害性研究。

Focal mechanism solutions of 4 events, for which required parameters are available, indicate left lateral strike slip faulting for 3 events and thrusting for one event.

结果表明，有 3次地震是左旋走滑断层活动，另一次地震是逆断层活动。地震震源机制解的P轴方向为NW SE和NE SW 。

By means of 10m spatial resolution SPOT images themajor rupture zone can be revealed distinctly, meanwhile, 1m spatial resolution IKONOS images display the fine structures and kinematical characteristics of the surface rupture of the earthquake.

应用高分辨率卫星影像进行地震地表破裂带解译，10m分辨率SPOT卫星影像能够清楚地反映出地震地表破裂主破裂带的形迹， 1m分辨率IKONOS影像能反映出地震地表破裂的精细结构及运动特征。

On the other hand, the term seismic sea wave can be misleading; seismic implies an earthquake-related generation mechanism, while tsunami is caused by a nonseismic event -- such as a landslide or meteorite impact.

&海底地震也使人误解。&地震是有关地震的代机制，但是海啸也能以非地震的事件发生，例如山崩或者陨石。

In this paper, an interspaced calculation model of a high-pier long-span continuous rigid frame bridge is established. The El Centro record is chosen to analysis the seismic response of the bridge. The longitudinal and lateral seismic responses are calculated. The influence of the P-△ effect on seismic response are studied.

建立了一座大跨度高墩连续刚构桥的空间计算模型，选用El Centro地震波对其进行空间地震响应分析，计算了该桥的纵向和横向地震响应，研究了P-△效应对其地震响应的影响。

Presence of multiples leads to poor quality in main stages of offshore seismic data processing, such as velocity analysis, stacking and imaging. Three basic multiple attenuating methods are reviewed; and a more effective multiple attenuator is achieved by joining them. As the first step, shot or receiver records are extrapolated by wave-equation datum algorithms. The extrapolation will establish a model of waterbottom multiples. Waterbotton multiples will then be removed by subtracting the extrapolated records from the original records. After that, predictive deconvolution is used to attenuate the multiples created by source ghost. Finaly, RADON transformation is adopted to separate peg-leg multiples and residual water-bottom multiples from the original data in the τ-p domain.

地震勘探尤其是海上地震勘探中存在着各类多次波，由于多次波的存在严重影响了速度分析、叠加、偏移成像等地震资料处理，海上多次波主要有全程多次波和层间多次两大类，为了压制海上不同类型的多次波，本文首先分析波场外推、预测反褶积和拉东变换衰减不同多次波的理论基础，然后联合采用这些方法，分别衰减全程多次波和层间多次波；即：首先对炮记录或者接收点记录进行波场外推，建立海底多次波模型，预测并减去全程多次波，然后利用预测反褶积衰减掉周期性明显的多次波，最后将数据转换到τ-p 域，用拉冬变换根据同一时间多次波和有效波在速度等方面的差异，进一步分离层间多次波和剩余的全程多次波，并在该域中切除分离出的多次波，从而实现联合多次波衰减处理。

The magnitude-8.8 quake was a type called a "megathrust," considered the most powerful earthquake on the planet. Megathrusts occur when one tectonic plate dives beneath another.

智利发生的这场里氏8.8级大地震属于&大逆冲型地震&，只有当一个地壳板块俯冲至另一板块的下方时才会发生，被认为是地球上威力最强的地震。

It studies the variations of deformation modulus, P wave velocity and acoustic emission in the process of rock fracture by cycle loading. Further, it is considered that the occurrence of earthquake outside Lijiang seismic area made the forced process changed, therefore, the Lijiang M7 earthquake came later, the impending precursory anomalies became unclear or complicated, and the magnitude decreased.

用循环加载研究岩石破裂孕育过程中变形模量、纵波速度和声发射的变化特征，进而探讨认为丽江地区外部地震的发生使受力过程发生了变化，从而使丽江7 级地震延迟发生，也使临近地震的前兆异常不明显或更复杂，并使丽江地震震级减小。

B Wrong C Not mentioned2. It is fun to identify the fault for the AD 365 earthquake and tsunami.3. Radiocarbon dating techniques can be used to identify the age of the earth.

现在地震学家对地中海断层进行研究，并认定断层的运动造成公元365年的地震和海啸，以及推算出地震和海啸发生的周期。

Taiwan is situated at the circum-Pacific seismic belt, as one of the areas of most frequent sensible earthquakes in the world. According to the statistics from Central Weather Bureau, Taiwan is on average experiences thousands of earthquakes every year and specifically, hundreds of sensible ones.

中文摘要台湾地区位处於环太平洋地震带，根据中央气象局统计，台湾平均每年发生地震次数多达千余次，有感地震更超过百次之多，属於世界上有感地震最频发的地区之ㄧ。

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。