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digital seismic     
相关语句
  数字地震
     Determination of surface wave magnitude M_S and systematic error analysis for regional digital seismic network
     区域数字地震台网面波震级M_S测定与系统误差分析
短句来源
     DELPH 2X──A Set of Dual Frequence and Dual Channel High Resolution Digital Seismic Survey System
     DELPH2X── 一种双频双道高分辨率数字地震探测系统
短句来源
     GDS-1000 GENERAL PORTABLE DIGITAL SEISMIC OBSERVATION SYSTEM
     GDS—1000宽频带通用流动数字地震观测系统
短句来源
     The characteristics of seismic coda wave attenuation in Yunnan area in 7 frequency bands from 1 Hz to 20 Hz were estimated by using the local earthquake′s waveform data recorded from 22 Yunnan digital seismic stations.
     利用22个云南区域数字地震台网近震资料,研究了云南地区地震尾波在1~20HZ内6个频段的衰减特征.
短句来源
     The management and application of ADP digital seismic prefiguration database
     ADP数字地震前兆数据库的管理和使用
短句来源
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  数字化地震
     Analysis and process of the thunderbolt for digital seismic station
     数字化地震前兆台站公用数据采集器雷害故障分析与处理
短句来源
     TIME-FREQUENCY METHOD AND ITS APPLICATION IN DIGITAL SEISMIC WAVE DATA PROCESSING
     数字化地震波形资料的时频分析方法及应用
短句来源
     We used 33487 P and 31822 S wave arrival times from 2866 events recorded by the North China seismic telemetry network and the Capital Circle digital seismic telemetry network from 1993 to 2005.The crustal three-dimensional P and S wave velocity structures in the Capital Circle area(38.5°N~41°N,114°E~120°E) are obtained with a horizontal resolution of 25 to 50 km. The Poisson's ratio distribution is also achieved.
     选用华北地震遥测台网和首都圈数字化地震遥测台网1993~2005年记录的2866个地震事件中的33487条P波和31822条S波的到时资料,计算得到了水平分辨率25km到50km之间的首都圈地区(38.5°N~41°N,114°E~120°E)地壳三维P波和S波速度结构,并进一步获得泊松比分布.
短句来源
     Lightning Proof Measures at Digital Seismic Precursor Observation Stations
     数字化地震前兆台站的防雷措施
短句来源
     In earthquake system,digital seismic precursory data are more and more,but the problems of this technique and management are also obviously existed.
     随着科学技术的不断发展,我国地震前兆观测技术由模拟记录到数字记录转变的实现,地震前兆数字化观测技术日趋成熟、稳定,地震前兆数字化观测普及程度越来越大,产出的数字化观测资料己得到越来越广泛的应用,数字化地震前兆台网的效益亦愈发明显,但也不可避免地存在着技术和管理方面的一些问题。
短句来源
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  数字地震台
     More than 1 700 seismic events(which occurred from 1982 to 2005,distributed in the range of 40°W~180°E,40°S~80°N,with magnitudes in 5.0~7.0 and focal depths shallower than 100 km) are selected from nearly 10 000 events recorded by 113 digital seismic stations in Asia,Europe and west Pacific networks.
     从亚洲、欧洲及西太平洋地区台网113个数字地震台所记录的分布在40°W~180°E,40°S~80°N范围内近万个地震事件中,挑选出发生在1982-2005年间,震级绝大部分在5.0~7.0之间,震源深度小于100 km的1 700余个事件。
短句来源
     IP transfer signal quality analysis for Guangzhou Digital Seismic Station
     广州数字地震台IP传输质量分析
短句来源
     Site Effects at Yunnan Regional Digital Seismic Stations Inversed by Moya Method
     用Moya方法反演云南数字地震台站场地响应
短句来源
     Study on the velocity structure of crust and upper-mantle beneath the digital seismic stations in Shaanxi Province
     陕西省数字地震台下方壳幔速度结构研究
短句来源
     Power supply unit system of digital seismic station
     数字地震台站的配电单元系统
短句来源
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  数字地震记录
     Application Bases of Digital Seismic Records
     数字地震记录应用基础
短句来源
     THE PRELIMINARY APPLICATION OF SOMPI SPECTRAL ANALYSIS METHOD IN PROCESSING DIGITAL SEISMIC WAVE RECORDS
     Sompi谱分析方法在处理数字地震记录中的初步应用
短句来源
     THE FUZZY MODEL IDENTIFICATION METHOD FOR THE PHASES OF THE DIGITAL SEISMIC RECORDS
     数字地震记录震相的模糊模式识别方法
短句来源
     The paper describes the development of the format of digital seismic recordcomprehensively, at the same time gives the main way to deal with the format ofdigital seismic record.
     本文首先综述了数字地震记录格式的发展状况,针对目前国际上通用的数字地震记录格式特点进行了比较和分析,对数字地震记录格式进行介绍,并对数字地震记录格式的主要处理方式进行描述。
短句来源
     In epicenter determination, we should bring the superiority of digital seismic record into full play, and improve the reliability and precision of epicenter determination by using the corresponding digital processing technique.
     此文主要目的是为评估首都圈数字地震台网的地震活动监测能力提供参考依据。 在地震定位中 ,应充分发挥数字地震记录的优势 ,采用相应的数字地震记录处理技术 ,提高地震定位的可靠性和精度。
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  digital seismic
-The development of the digital seismic network in the Azores Archipelago during recent years made it possible to obtain the amplitudes (waveform) of recorded motion in a large set of stations.
      
The explosions were recorded by a number of digital seismic stations, located in Kazakhstan at distances ranging from 0 to 720?km.
      
The data were acquired using multichannel digital seismic instruments with close station spacing.
      
Since digital seismic instrumentation is now expanding in Greece, these first results from spectral analysis of digital short-period data can be considered useful for future seismic hazard studies.
      
In the present review, the results from vertical reflections, wide-angle reflections and broadband digital seismic recordings are reviewed and compared.
      
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Dong-Xing Oil Field is a typical complex structure cut by many faults. In this oil field, a precise seismic survey proved to be quite effective. Some techniques of early 3-D seismic interpretation (stereo-migration) are described in this paper. Essen-tially they are;1) A strict three-dimensional network of profiles.2) The recognition and the utilization of some abnormal events.3) The closure check of fault planes.4) The determination of spatial position of every reflection event by the △ti diagram.5) The 3-D...

Dong-Xing Oil Field is a typical complex structure cut by many faults. In this oil field, a precise seismic survey proved to be quite effective. Some techniques of early 3-D seismic interpretation (stereo-migration) are described in this paper. Essen-tially they are;1) A strict three-dimensional network of profiles.2) The recognition and the utilization of some abnormal events.3) The closure check of fault planes.4) The determination of spatial position of every reflection event by the △ti diagram.5) The 3-D migration by direct correlation, i.e., laterally rearranging all the reflection events from a series of 2-D migrated depth sections for forming a new series of 3-D migrated depth sections.These techniques are valuable to the 3-D seismic prospecting and to the geological interpretation of fault planes.In recent years, a simpler structure was found below this complex shallow struc-ture, by use of the digital seismic data. Several figures are presented showing the typical geological relationship between the shallow structure and the deep one.

东辛油田是一个典型的断块复杂构造。在这个油田上,地震精查的方法在搞清断裂系统方面,取得了较好的成效。本文简述了在该油田早期所采用的一套三维地震解释(立体归位)方法,其中有些方法对当前搞三维地震勘探,及断层面的地质解释方面都还有着参考价值。近年来,又用数字地震方法,在此浅层的复杂构造的下面,发现了比较简单的深层构造,在几张附图中展示了深浅层构造之间的关系。

This paper deals with the Walsh Transformation and sign bits checking as applied to seismic prospecting.At present, in all digital seismic instruments, each sampling and data of each channel are usually considered as independent, uncorrelated informations while trans mitting and recording, resulting in a large amount of trivial informations. As a matter of fact, each sampling and data between traces are closely related to each other. It is possible to compress the data in order to make full use of the...

This paper deals with the Walsh Transformation and sign bits checking as applied to seismic prospecting.At present, in all digital seismic instruments, each sampling and data of each channel are usually considered as independent, uncorrelated informations while trans mitting and recording, resulting in a large amount of trivial informations. As a matter of fact, each sampling and data between traces are closely related to each other. It is possible to compress the data in order to make full use of the transmitted and recorded traces and to raise the efficiency of seismic work.Recent advances in statistical mathematics, digital and semi-conductor techniques could be used to compress the data at the geophones and to restore the informations from the compressed data. This may provide a way for manufacturing data compression seimic instruments.

本文介绍沃希变换和符号位检测在地震勘探中的应用.当前,各种数字地震仪都是把各次采样和各道间数据作为独立的、不相关的信息进行传输和记录,因而传输和记录了大量多余的信息.实际上,各次采样和各道间的数据都密切相关,可以将这些信号的数据进行压缩,以充分应用传输和记录信道,提高地震勘探的效率.目前,统计数学、数学技术和半导体技术的成就,已可以实现在检波器站上将数据压缩;在计算站上也有从压缩的数据中检出有用的信息恢复其本来面貌的能力.这就为研制数据压缩的地震仪创造了条件.

Zero drift in main amplifier is one of the important factors which affects the stability and accuracy of the digital seismic data acquisition system. This paper makes a further discussion on this problem, and presents some ideas on how to eliminate errors and update the circuit of the amplifier.

零点漂移问题是影响数字地震仪的稳定性和精度的重要因素之一。本文对这一问题作了进一步的讨论,并提出了消除误差、改进仪器线路的几点设想。

 
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