| 1. | In this area near seattle , a network of cameras , seismic motion detectors , and banks of computer monitors help agents keep track of the border
在西雅图附近，监视器网络，振动感应探测器和电脑屏幕来时刻监测边境情况。 |
| 2. | In this area near seattle , a network of cameras , seismic motion detectors and banks of computer monitors help agents keep track of the border
该地区靠近西雅图，摄像网络、震波运动跟踪和银行计算机跟踪帮助监控中心对边界动态进行跟踪。 |
| 3. | In this area near seattle , a network of cameras , seismic motion detectors and banks of computer monitors help agents keep track of the border
这一边境靠近西雅图，一个由摄像机、地震活动监视器和电脑监测构成的网络能帮助工作人员了解边境情况。 |
| 4. | In this area near seattle , a network of cameras , seismic motion detectors and banks of computer monitors help agents keep track of the border
在这个地区靠近西雅图的地方，网络摄像头，地震活动检测器和银行用的计算机监视器可以帮助警员们监控边境。 |
| 5. | In this area near seattle , a network of cameras （ signs ） seismic motion ( detectives ） detectors and banks of computer monitors help agents keep ( check ) track of the border
在这个靠近西雅图的地方，地震监测摄像机网络和大量的计算机监视器帮助边防站记录边界线的情况。 |
| 6. | According to the need of design code for anti - seismic of engineering constructure , the bedrock peak acceleration rate and response spectrum of exceeding probability of 63 % , 10 % and 2 % are given respectively and seismic motion parameters are also calculated , which will provide the evidences for anti - seismic design of this electric power equipment station
按工程建筑物抗震设计规范要求，分别给出了50年63 % 、 10 %和2 %超越概率水平的基岩峰值加速度及反应谱，计算出地震动参数，为该电力设备站建设提供了抗震设计依据。 |
| 7. | Based on the basic principles of dynamical analysis by using finite element method , formulas for back - evaluating the stochastic seismic characteristics of the bedrock from the stochastic seismic characteristics of the ground surface were derived by using the impulse - response function and the principles of fourier transform . a method of back analysis for this purpose is put forward . the example shows that the ground has an obviously amplifying effect for seismic motion
6从有限元动力分析的基本原理出发，利用脉冲响应函数和傅立时变换对原理，推导了由地面地震运动特性反算基岩地震运动特性的反分析计算公式，提出了一种用于由地面地震动特性计算基岩地震动特性的二维有限元反分析方法。 |
| 8. | Based on the theory of interaction of fluid - solid , the fem and semi - analytic method are used to analyze the reaction of dam - reservoir subjected to seismic motion , the analysis includes the effect of water compressibility , reflectance of reservoir bottom and water viscosity . the mechanical properties , isolation mechanism and effects of hydraulic air cushions are studied theoretically
从流固耦合理论出发，以有限元分析为主要研究手段，并辅之以半解析法，系统深入研究了水可压缩性、库底库底边界和水体的粘滞性对拱坝地震动水压力及坝体地震反应的影响及其规律性。 |
| 9. | In ultimate - state seismic design , energy spectra have been used for the reliable indices of seismic motions that determine their influences on structural failure and non - linear response . also , energy of ground motion can be viewed an index to incorporate the duration effect on structures , because longer duration usually induces a large energy demand . the duration of ground motion is so sufficiently taken into account
目前常用的反应谱，无论是弹性或非弹性的，一个最大的缺憾是它们都没有充分考虑输入地震动持时的影响，但在能量谱中由于要反映随着持时增长引起的能量变化，因而持时影响得到了充分的考虑，这是能量谱的一个十分重要的特点。 |
