直接使用FFT由数字地震记录来恢复地面位移可能产生包括虚假的长周期分量在内的不正确结果。
It is possible to yield incorrect results including false long period components, during the restitution of the ground displacement from digital seismograms directly using FFT.
本文将数字台网建立以来在使用数字地震记录仪中遇到的仪器设备故障及环境对仪器设备的影响加以总结。
The paper summarized the instrument device failure and environment's influence on instrument devices since the foundation of digital seismic network.
为研究长周期地震动反应谱特性，本文首次采用了地震学研究所使用的宽频带数字地震记录作为数据基础。
In this paper, we use the digital broad-band records to study the characteristics of long-period ground motion.
论述了周期-频度谱方法在分析数字化地震记录中的应用。
Applying period frequency spectrum method to analysis of digital seismic recording is discussed in this parer.
数字现场监视记录仪是地震采集系统的一个重要组成部分，它让我们能及时监视和处理野外地震资料、控制记录质量。
As one important part of seismic data acquisition system, on-site digital recording system not only can monitor and process field seismic data in time but also can control recording quality.
在中国大陆2001年以来发生的数次5级以上地震前，山西侯马数字化形变台的波形记录发生了明显变化。
Before several M5.0 earthquakes from 2001, the wave recording data of the deformation digital observation show the clear changes in seismic station of Houma, Shanxi Province.
综述了磁带记录在地震观测上的应用，主要介绍了模拟和数字磁带记录和相应的时间服务系统的情况。
The second paper elaborates the application of tape recording to earthquake observations, mainly describing the analogue and digital tape recording and the corresponding time service systems.
使用陕西数字地震台网1998～2003年间的地震记录，以台网平均震级为标准震级，分析了各子台的测定震级。
On the Basis of 1998-2003 digital seismic data from the Shaanxi Digital Seismic Network, we analyzed the magnitudes determined by the substations of the network.
这些数据通过数字化地震仪pdas- 100记录得到，并使用DADISP软件加以分析。
These data were recorded by digital seismograph PDAS-100 and analyzed by DADISP software.
经过数字滤波和频谱分析等技术， 由地震记录图中分离出了断层围陷波。
The fault zone trapped waves were separated from seismograms by numerical filtering and spectral analyzing.
人工爆破波能在地球内和地表中传播，类似于天然地震波，可被事件发生地点附近的数字地震台网记录。
The wave incurred by explosion can like as that of earthquake spread in the interior and surface of the earth and be recorded by the digital seismic network.
提出了一种利用单个地震台站三分向数字地震波形记录进行单台地震自动定位的网格搜索法。
A grid searching method with single station for automatic earthquake location, which utilizes 3-component digital waveform records is proposed.
开发了利用扫描仪扫描地震记录图纸，对图像进行数字化的软件。
A computer program system for digitizing the analog seismic record is developed.
根据初至波特点，基于数字图像处理技术，提出了应用边缘检测和边缘追踪技术进行初至波自动拾取的方法。该方法的实现过程为：①对地震记录做单道归一化处理；
The digital image processing such as edge detection and boundary tracing to pick up the first break time is discussed in this paper, which based on the specialty of first break time.
用丰富的高质量数字强震记录对台湾集集大地震及余震的长周期地震动特性进行了研究。
The study of long-period seismic wave is significant to the seismic design of the large-span engineering structures with long auto-oscillation period.
本文介绍了一种用于地震观测的三分向数字式地震事件记录器。
In this paper, a three-component digital seismic recorder designed for seismic observatories is described. A semiconductor memory is used as a delay unit.
地震观测数字化，地震观测资料的载体发生根本转变，数字观测记录光盘的归档与管理就成为科技档案管理部门目前急待解决的一个问题。
Along with the development of electronics and computer technology, the way of earthquake observation is getting to be digital measure instead of traditional analog measure.
数字记录的初至波早于模拟记录，且持续时间较长，大部分的数字地震震级比模拟记录、标准震级小。
The first array wave in digital record is earlier than that in analog record, and with longer duration. It also found that the most of the ear...
数字记录的初至波早于模拟记录，且持续时间较长，大部分的数字地震震级比模拟记录、标准震级小。
The first array wave in digital record is earlier than that in analog record, and with longer duration. It also found that the most of the ear...
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