检索结果-南通市图书馆

地学前缘 2000年第S1期7卷 271-271页

作者： Liu Hongbing,Kong Xiangru, Yan Yongli,Ma Xiaobing[WT5,5”BX](institute of Geology and geophysics, chinese academy of sciences, beijing 100101,china, E\|mail: hbliu@mail.c\|***)

A geophysical survey including Magnetotelluric sounding(MT), gravity and geomagnetism was carried out in eastern region of Qinghai—Tibet plateau in 1998. It is to be known from tectonic map that study area was divided into four blocks by three large sutures, but we have very little information on deep\|seated structure which have close relationship with evolution of Tibet plateau, our purpose is to find some deep crustal structure evidences of the blocks and sutures for understanding deep tectonic feature in this region. The geophysical survey region is located in about 97～98°E and 35～26°N, the profile with the length of 760km runs through Bayanhar, Qingtang and Gandise block in NS direction, 349 gravity and geomagnetic data were acquired simultaneously, and 31 MT sites are be placed along the profile with about 18km\|interval to detect electrical conductive feature.

关键词： eastern region of Tibet plateau geophysical survey crustal structure MT and gravity

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各向同性阶跃光纤的偏振椭圆度

山东师范大学学报（自然科学版） 2004年第1期19卷 26-29页

作者：王安玲刘福平杨长春北京印刷学院北京102600 中国科学院地质与地球物理研究所北京100101

利用全反射光在光纤包层中的横向偏移和相位变化 ,导出了各向同性阶跃光纤的全反射偏振椭圆度和偏振椭圆度长度计算公式。

关键词：阶跃光纤横向偏移偏振椭圆度全反射光

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用过采样小波变换提高地震资料分辨率

石油物探 2003年第4期42卷 513-516页

作者：刘培体刘喜武年静波中国石化胜利油田物探研究院山东东营257000 中国科学院地质与地球物理研究所中国石油大庆油田勘探开发研究院

小波分析具有时频局部化优点 ,被誉为“数学显微镜”。讨论了利用小波变换提高地震资料分辨率 ,在阐述小波原理的基础上 ,给出小波分频带能量合理补偿提高分辨率的方法。考虑到快速小波变换分解尺度数目与信号样点数有关 ,借鉴通讯系统... 详细信息

小波分析具有时频局部化优点 ,被誉为“数学显微镜”。讨论了利用小波变换提高地震资料分辨率 ,在阐述小波原理的基础上 ,给出小波分频带能量合理补偿提高分辨率的方法。考虑到快速小波变换分解尺度数目与信号样点数有关 ,借鉴通讯系统中的过采样技术 ,提出过采样小波变换提高地震资料分辨率方法。实际资料试算表明 ,过采样小波变换方法可以有效提高地震资料分辨率 ,是对小波变换方法的扩展。

关键词：地震勘探地震资料分辨率采样小波变换地震信号处理

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中国反射地震“陆相断陷模型”简介

地球物理学报 2000年第5期43卷 725-728页

作者： Project Office of Reservoir geophysics (institute of Geology and geophysics. chinese academy of sciences, beijing 100101, china) 中国科学院地质与地球物理研究所"油储地球物理"项目办公室北京100101

In order to raise the level of reflection seismology data processing and to test the method of velocity estimation and migration imaging, the geophysical organizations, such as IFP (institute Francois de Petrole) and SEG/EAGE, have proposed 2D Marmousi model and 3D salt dome model, which have widely used in explorative geophysics. However, those two models are based on the geological background of Europe and the Middle Eastern, which reflects the sedimentary character of marine facies. In order to accelerate our terrestrial facies reservoir geophysics research, to meet the need of our country to method and technique and to make geological model for testing seismic data processing be able to demonstrate the special character of our terrestrial sedimentary facies, the academic committee of reservoir geophysics project, suggested to set up a typical model for china. For realizing this suggestion, Chen Shu Min, Guan Ye Jun, and Fu You Sheng from Daqing oil field proposed 2D geology model, so called china terrestrial facies fault depression model, based on the practice interpretation result given by Wang Pu Jun、 Shan Xian Long from Changchun Science and Technique University, as a testing tool for research of methodology in the reservoir project. Liu Hong and Gao Hong Wei from the institute of Geology and geophysics, CAS, completed the tessellation of the proposed terrestrial facies fault depression model and digitalization of velocity model. After that, Dong Liang guo, Wang Hua Zhong from Tongji University carried out the seismic reflection wave numerical simulation by means of self developed simulation software, worked out a 60 fold seismic data on the model for reference in this research area. Terrestrial facies fault depression model show the structural characteristics of Daqing igneous (Fig.1). The length of whole model is 60km, depth 4km; the deep tectonics is very complex, the main characters of tectonics are as followes. 1. Under the action of rise igneous, fault

关键词：陆相断陷模型合成地震道记录建模

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频率域地表一致性反褶积方法及应用效果分析

石油物探 2003年第1期42卷 97-101页

作者：郭树祥李建明毕立飞刘洪胜利石油管理局物探研究院山东东营257022 中国科学院地质与地球物理研究所北京100101

提高地震资料分辨率的重要手段是采用反褶积技术。反褶积方法很多 ,如子波反褶积、脉冲反褶积和预测反褶积等。这些方法各有优缺点 ,在高分辨率资料处理中应用受到许多条件制约 ,不能有效地提高资料的分辨率 ,其效果不能满足解释人员的... 详细信息

提高地震资料分辨率的重要手段是采用反褶积技术。反褶积方法很多 ,如子波反褶积、脉冲反褶积和预测反褶积等。这些方法各有优缺点 ,在高分辨率资料处理中应用受到许多条件制约 ,不能有效地提高资料的分辨率 ,其效果不能满足解释人员的要求。作频率域地表一致性反褶积需要对记录进行频谱分析和频谱分解 ,同时要设计反褶积算子 ,然后在共炮点域和共接收点域分两步对资料进行褶积。这种方法能够展宽频谱 ,压缩地震子波 ,并能校正地震信号的相位谱 ,输出零相位子波 ,较大程度地提高地震资料的分辨率。该方法在胜利油田车2 2地区三维等资料处理中应用。

关键词：反褶积地震资料频率域资料处理地震子波炮点地震信号分辨率一致性行频

Uncertainty in magnetic activity indices

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Science china(Technological sciences) 2008年第10期51卷 1659-1664页

作者： XU WenYao institute of Geology and geophysics, chinese academy of sciences, beijing 100029, china institute of Geology and geophysics Chinese Academy of Sciences Beijing 100029 China

Magnetic activity indices are widely used in theoretical studies of solar-terrestrial coupling and space weather prediction. However, the indices suffer from various uncertainties, which limit their application and even mislead to incorrect conclu-sion. In this paper we analyze three most popular indices, Kp, AE and Dst. Three categories of uncertainties in magnetic indices are discussed: "data uncertainty" originating from inadequate data processing, "station uncertainty" caused by in-complete station covering, and "physical uncertainty" stemming from unclear physical mechanism. A comparison between magnetic disturbances and related indices indicate that the residual Sq will cause an uncertainty of 1―2 in K meas-urement, the uncertainty in saturated AE is as much as 50%, and the uncertainty in Dst index caused by the partial ring currents is about a half of the partial ring cur-rent.

关键词： magnetic activity indices Kp AE Dst solar-terrestrial coupling space weather

Relationship between Environmental Pollution of Coal Mine and Spectral Characteristics of Nearby Plants

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Journal of University of Science and Technology beijing 2001年第1期8卷 10-14页

作者： Liqing Lei institute of Geographic sciences and Natural Resources Research, chinese academy of sciences, beijing 100101, china chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China

Remote sensing technology, as the most advanced method for collecting data, along with the common ways often used in the past on research of environmental science, was integrated to study the relationship between environmental pollution of coal mine and spectral characteristics of nearby plants. With compositive index and mean reflectivity at near infrared, a regression equation was established, and a conclusion was made that spectral reflectivity can be used to distinguish regions with different pollution degree. Through testing with real status of the research region, it is verified that this kind of integration and conclusion not only are helpful for human being in controlling the movement law of pollutants and the corresponding change of coal mine environmental quality but also bring a new way for the research of environment problems of coal mine.

关键词： remote sensing spectral characteristics reflectivity pollution index compositive index atmospheric pollution

Searching for the remains of subducted continental slabs

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chinese Science Bulletin 2000年第5期45卷 385-386页

作者： LIU Guangdinginstitute of Geology and geophysics, chinese academy of sciences, beijing 100101, china institute of Geology and geophysics Chinese Academy of Sciences Beijing China

On the basis of oceanic geological and geophysical observations the global plate tectonics theory wasput forward in the late 1960s. It inherited the essence of mobilism of continental drift and sea-floorspreading, caused a revolution of earth sciences in the twentieth century. But plate tectonics cannotsatisfactorily explain the complicated geological phenomena of continents, it fails in elucidating

关键词： Searching for the remains of subducted continental slabs der Nature

Two special topics on the avian influenza virus and on epigenetics,have drawn much attention

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Science china(Life sciences) 2010年第12期53卷 1483-1484页

作者： HU YongLin institute of Biophysics,chinese academy of sciences,beijing 100101,china 1. institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

Several excellent well-organized reviews and research papers on two special topics, "The challenges of avian influenza virus: mechanism, epidemiology, and control" and "Molecular

关键词： APOBEC gene Two special topics on the avian influenza virus and on epigenetics,have drawn much attention