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河北省地电阻率干扰分析 总被引:2,自引:2,他引:0
《地震地磁观测与研究》2016,(1)
通过河北省地电阻率观测资料整理、干扰源调研及时序分析,总结各类干扰源表现形态及干扰机制,并提出排除干扰的方法,为有效识别地电阻率干扰、异常判定及地震预测预报提供依据。 相似文献
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《地震地磁观测与研究》2016,(6)
选取河北省昌黎、阳原、大柏舍、兴济、肥乡、滦县6个地震台站地电场观测资料,通过资料整理、日志查阅、干扰源调研,对常见观测系统故障、工频干扰、雷电干扰、高压直流输电、地电暴等干扰源的表现形态及干扰机制进行分析,并提出干扰排除方法,为有效识别干扰、异常提取及地震预测预报提供可靠依据。 相似文献
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永安台钻孔体应变干扰与故障现象的探讨与总结 总被引:1,自引:0,他引:1
《华南地震》2015,(3)
对永安台钻孔体应变观测的干扰特征进行了分析,研究了影响钻孔应变仪观测曲线畸变的一些因素,有助于我们在今后的工作中对TJ-IIC型体应变仪及其他前兆数字化仪器的不同干扰进行识别;同时还总结了观测中碰到的故障情况及解决方法,希望有利于提高台站观测人员对体应变仪的维护经验,提取可靠的观测数据信息,为地震短临预报提供可靠的判定依据和指标。 相似文献
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肃南地震台形变观测资料干扰识别与排除 总被引:1,自引:1,他引:0
收集整理甘肃省地震局肃南地震台形变数字化观测资料,对降雨、大风、人员进出、仪器调零、断电或者电压不稳定,以及其他仪器故障等因素造成的干扰进行分析;为数字化资料的利用、各种干扰的识别以及捕捉地震短临异常,提供可借鉴的实例. 相似文献
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月球影像数据是研究月球的地貌、地表形态,绘制全月地形图以及进行各种相关科学研究的基础.早期的Lunar orbiter,Apollo,Surveyor基本是以模拟影像格式传回地球,经过扫描后以照片形式发布.Clementine 的数据是通过PDS中心,以PDS的形式发布的.影像数据的保存与发布格式应遵循以下原则:数据格式要便于经常更新和补充;能够在各种平台和各不同目的使用人群中方便地使用;要符合国际标准,方便处理,能够与以前多次探测计划得到的数据结合使用.为中国嫦娥工程的影像数据格式提出建议. 相似文献
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Comparison between satellite and in situ sea surface temperature data in the Western Mediterranean Sea 总被引:1,自引:1,他引:0
Aida Alvera-Azcárate Charles Troupin Alexander Barth Jean-Marie Beckers 《Ocean Dynamics》2011,61(6):767-778
A comparison between in situ and satellite sea surface temperature (SST) is presented for the Western Mediterranean Sea during
1999. Several international databases are used to extract in situ data (World Ocean Database, MEDAR/Medatlas, Coriolis Data
Center, International Council for the Exploration of the Sea and International Comprehensive Ocean-Atmosphere Data Set). The
in situ data are classified into different platforms or sensors (conductivity–temperature–depth, expendable bathythermographs,
drifters, bottles, and ships), in order to assess the relative accuracy of these type of data with respect to Advanced Very
High Resolution Radiometer SST satellite data. It is shown that the results of the error assessment vary with the sensor type,
the depth of the in situ measurements, and the database used. Ship data are the most heterogeneous data set, and therefore
present the largest differences with respect to in situ data. A cold bias is detected in drifter data. The differences between
satellite and in situ data are not normally distributed. However, several analysis techniques, as merging and data assimilation,
usually require Gaussian-distributed errors. The statistics obtained during this study will be used in future work to merge
the in situ and satellite data sets into one unique estimation of the SST. 相似文献
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经过中国国家地震局(SSB)和美国地质调查局(USGS)的通力合作,中国数字地震台网(CDSN)于1987年10月开始运行,记有三分向短周期SP、宽频带BB、长周期LP和超长周期VLP4种频带的数据记录。CDSN的网月带中记录了数字化的VLP地震波形数据,网月带中含有网月带中记录了数字化的VLP地震波形数据,网月带中含有网月带月志文件、台站月志文件和VLP数据文件,其中VLP数据文件有数据月志和V 相似文献
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基于数据挖掘的概念,详细地阐述了岩石物理数据、测井数据、地震数据和地质数据的特征,并根据其数据特征,确定了岩石物理和测井数据、地震数据和地质数据的三种挖掘思路.用不同的挖掘思路对相应的数据分别展开挖掘,并从挖掘功能的角度分别描述挖掘的成果,即岩石物理数据之间的联系和对储层的预测;测井数据在复杂地质条件下对模糊储层的评价,及有效储层的识别;三维地震数据的空间挖掘成果;地质数据的图表和文本挖掘成果.数据挖掘技术将数据分析方法和对应的数学模型引入勘探领域,从海量的勘探数据中获取潜在信息,用于指导油气的勘探,实现了由数据指导勘探的目的,提出了数据勘探的概念. 相似文献
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Periodicites in hydrologic data are frequently estimated and studied. In some cases the periodic components are subtracted from the data to obtain the stochastic components. In other cases the physical reasons for the occurrence of these periodicities are investigated. Apart from the annual cycle in the hydrologic data, periods corresponding to the 11 year sunspot cycle, the Hale cycle and others have been detected.The conclusions from most of these studies depend on the reliability and robustness of the methods used to detect these periodicities. Several spectral analysis methods have been proposed to investigate periodicities in time series data. Several of these have been compared to each other. The methods by Siddiqui and Wang and by Damsleth and Spjotvoll, which are stepwise procedures of spectrum estimation, have not been evaluated. 相似文献
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中国地磁台站现代化技术研究 总被引:1,自引:1,他引:0
程安龙 《地震地磁观测与研究》1999,20(5):54-66
中国地磁台站面临着现代化技术改造问题。虽然现代化要以数字化为基础,但数字化不等于现代化。数字化记录应根据中国的国情,有正确的系统组成和恰当的技术指标。现代化有别于经典仪器的主要点在于数字化,准实时数据传输,即时的数据处理和资料产出以及更高的资料质量,只有这样才符合现代化的基本要求。本文对有关中国地磁台站的现代化技术问题进行了讨论。 相似文献
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A. R. Rao G. D. Jeong Fi-John Chang 《Stochastic Environmental Research and Risk Assessment (SERRA)》1992,6(4):270-288
Periodicites in hydrologic data are frequently estimated and studied. In some cases the periodic components are subtracted from the data to obtain the stochastic components. In other cases the physical reasons for the occurrence of these periodicities are investigated. Apart from the annual cycle in the hydrologic data, periods corresponding to the 11 year sunspot cycle, the Hale cycle and others have been detected.The conclusions from most of these studies depend on the reliability and robustness of the methods used to detect these periodicities. Several spectral analysis methods have been proposed to investigate periodicities in time series data. Several of these have been compared to each other. The methods by Siddiqui and Wang and by Damsleth and Spjotvoll, which are stepwise procedures of spectrum estimation, have not been evaluated.Two of the methods of spectral analysis proposed by Siddiqui and Wang and by Damsleth and Spjotvoll are investigated in this study by using generated and observed data. Siddiqui and Wang's method is found to be superior to the Damsleth and Spjotvoll's method. 相似文献