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Tectonomechanical analysis of Listric Faults

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Acta Geologica Sinica(English Edition) 1988年第2期1卷 127-140页

作者： Chen Qiang center for analysis and {2., State seismological bureau, beijing center for analysis and {2. State Seismological Bureau Beijing

Listric faults of different levels and scales are widely developed in the lithosphere. According to theirtectonomechanical geneses. the author divides listric faults into primary and secondary ones. and the formermay be subdivided into gravity-gliding listric faults, regional extensional listric normal faults. regionalcontractional reverse listric faults and deep-seated ductile listric faults, By means of the slip-line field theorydealing with Mohr’s criterion expressed by quadratic limiting curves. the author has preliminarily determinedthe occurrences. patterns and mechanical properties of various types of listric faults during their formation. andhas analyzed their tectonic evolution and related dynamic processes in the lithosphere.

关键词： Tectonomechanical analysis of Listric Faults

The study of two-color excitation upconversion of Pr(0.5)Yb(3):ZBLAN

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Science china(Physics,Mechanics & Astronomy) 2006年第2期49卷 169-177页

作者： CHEN Xiaobo1 & SONG Zengfu2.1. Applied Optics beijing Area Major Laboratory, analysis and testing {2., beijing Normal University, beijing 100875, china 2. Peking University, Physics School, beijing 100871, china Applied Optics beijing Area Major Laboratory Analysis and testing center Beijing Normal University Beijing China Physics School Peking University Beijing China

The excited state absorption upconversion of Pr(0.5)Yb(3):ZBLAN glass material, under two-color excitation of the 960 nm semiconductor laser and the Xe lamp light simultaneously, is reported in this article. It was found that the upconversion emission spectra of 480.1, 519.0, 601.9 and 631.8 nm coincide with the common emission spectra. Meanwhile, the upconversion-excitation spectrum has three obvious peaks under two-color excitation, and they respectively correspond to the 856.0 nm upconversion ex-citation transition [1G4(Pr3+)→1I6(Pr3+) and 1G4(Pr3+)→3P1(Pr3+)], the 789.0 nm upconver-sion excitation transition 1G4(Pr3+)→3P2.Pr3+), and the 803.7 nm upconversion excitation transition 3H6(Pr3+)→1D2.Pr3+). The upconversion excitation transition 1G4(Pr3+)→1I6(Pr3+) is strong because its oscillator strength f = 2..040×10?6 is large, which results in a large peak appearing in the upconversion excitation spectrum. That is just the new interesting two-color excitation upconversion luminescence phenomenon of Pr(0.5)Yb(3):ZBLAN induced by one laser and one continuous normal light simultaneously.

关键词： upconversion volumetric three-dimensional display two-color excitation.

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Research Note

Acta Seismologica Sinica(English Edition) 1996年第1期9卷 147-155页

作者： CUI YING ZHOU 1) , YU XIA ZHANG 2. , HONG WEI WANG 1) and LI QIANG JIAO 2. 1) seismological bureau of Shandong Province, Jinan 2.002., {2. 2. center for analysis and prediction, SSB, beijing 100036, {2.

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关键词： earthquake sequence pattern recognition comprehensive diagnostic index.

Earthquake damage and loss estimation with Geographic Information System

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Acta Seismologica Sinica(English Edition) 1998年第6期11卷 95-102页

作者： YONG CHEN GE PING LI QI FU CHEN LING CHEN MIN FENG LI center for analysis and {2., china seismological bureau, beijing 100036, china

The present paper first includes a brief discussion of GIS technology. Next, the various steps in a regional earthquake damage and loss analysis are discussed, with emphasis on their implementation in the GIS environment. Lastly, a software of WorldRisk which was completed recently are presented to illustrate GIS based global earthquake damage and loss estimation.

关键词： GIS earthquake damage loss estimation

National 2.00' GPS control network of china

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Progress in Natural Science:Materials International 2007年第8期17卷 983-987页

作者： Yang Yuanxi~(1**) Tang Yingzhe~1 Chen Chuanlu~2.Wang Min~3 Zhang Peng~4 Wang Xiaorui~2.Song Lijie~5 Zhang Zusheng~6 (1.Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,china 2.Geodetic Data Processing center,Xi'an 710054,china 3.center of Earthquake analysis and prediction,china seismological bureau,beijing 100036,china 4.National Geomatics center of china,beijing 100044,china 5.Institute of Surveying and Mapping,Zhengzhou University of Information Engineering,Zhengzhou 450052.china 6.First Crustal Deformation Monitoring center,china seismological bureau,Tianjin 300180,china) Xi'' an Research Institute of Surveying and Mapping Xi'' an 710054 China Geodetic Data Processing center Xi'' an 710054 China center of Earthquake analysis and {2. China Seismological Bureau Beijing 100036 China National Geomatics center of china Beijing 100044 China Institute of Surveying and Mapping Zhengzhou University of Information Engineering Zhengzhou 450052 China First Crustal Deformation Monitoring center China Seismological Bureau Tianjin 300180 China

An accurately unified national GPS network with more than 2.00 stations,named"National 2.00' GPS Control Net- work",signed the epoch 2.00.0,has been established by integrating the existing six nationwide GPS networks of china set up by differ- ent departments with different *** paper presents the characteristics of the existing GPS networks,summarizes the strategies in the integrated adjustment of the GPS network,including functional model,stochastic model as well as the adjustment principle modifi- *** modifying the adjustment strategies according to the characteristics of the existing GPS networks and under the support of the IGS stations,the accuracy of the integrated national GPS network is greatly *** datum differences among the sub networks disappear,the systematic error influences are weakened,and the effects of the outliers on the estimated coordinates and their variances are *** is shown that the average standard deviation for the horizontal component is smaller than 1.0 cm,the vertical component is smaller than 2.0 cm,and the three-dimensional (3-D) position of geocenter coordinates is smaller than 3.0 *** exterior checking ac- curacy for the 3-D position is averagely better than 1.0 cm.

关键词： GPS control network adjustment systematic errors robust estimation variance component estimation coordinate system

DISPLACEMENT TIME SERIS AT FIDUCIAL STATIONS OBTAINED FROM GPS OBSERVATIONS IN CRUSTAL MOVEMENT OBSEREVATION NETWORK OF china

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大地测量与地球动力学 2003年第B12期23卷 54-61页

作者： Gu Guohua and Zhang Jing (center for analysis and {2., CEA,beijing 100036,china) center for analysis and {2. CEABeijing 100036China

A preliminary analysis of the time series of displacements at fiducial stations obtained from continuous GPS observations during the period of Sept. 1998 to Oct. 2.01 in the Crustal Movement Observation Network of china (CMONOC) is made. The selection of datum for producing displacement time series suitable for earthquake {2. is discussed. Time series of horizontal crustal displacements are obtained by using a datum of a stable group of 9 stations with very small relative horizontal displacements in eastern china as reference. Time series of vertical crustal displacements are obtained by using a stable group of 7 stations scattered in different regions with relatively small relative vertical displacements as reference. During the period of 2.00 to 2.01, anomalous horizontal and vertical displacements occurred twice at the fiducial stations in western china. These anomalies may be related to seismic activities of magnitudes about 6 in the Yunnan region on the North South seismic belt.

关键词：地壳运动 GPS观测与数据处理基准站位移时间序列分析位移结果

Research on Algorithm M8 Applying to TIP prediction of china's Strong Earthquake Cases in the Past Decades

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Earthquake Research in china 1994年第4期8卷 4-10页

作者： Huang Deyu and Chen Yongcenter for analysis and {2.,SSB,beijing 100036,china State seismological bureau,beijing 100036,china

This paper offers a positive research result of TIP before 16 strong earthquakes in North and Southwest china and their nearby areas since 1979 by using improved algorithm *** result showed that 14 of them were determined to occur within the times of increased *** precaution occupies about 37% of the total space-time *** means we have made quite good results of intermediate-term prediction of strong *** the method could be used as one of the useful means of the intermediate-term prediction of strong earthquakes.

关键词： M8 algorithm Intermediate-term earthquake prediction

Study on Variation of Fitting Goodness of Relation Between Earthquake Frequency and Magnitude before Moderately Strong Earthquakes (Ms≥5.0)

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Earthquake Research in china 1996年第4期10卷 20-28页

作者： Li Zhixiong,Zhang Guomin,Fu Zhengxiang,and Zhang YongxianState seismological bureau,{2. 100036,china center for analysis and prediction,SSB,{2. 100036,china

In this paper,characteristics of spatial and temporal variation of linear fitting goodness before some moderately strong earthquakes(Ms≥5.0)in the eastern part of china(east of longitude 180)are studied according to the famous Gutenberg-Richter’s relation expressed as lgN=a-bM,by using the moderate and small events that occurred in and around the source *** results show that the linear goodness of fitting varies abnormally prior to these moderately strong *** the early stage of the earthquake preparatory process,distribution of the energy released through small events in and around the source area is isostatic and the fitting goodness approximates 1,while the distribution of the energy turns to be isostatic before moderately strong earthquakes,leading to the obvious decrease of the linear goodness of *** phenomenon could be a medium term anomaly and a medium term criterion for moderately strong earthquake prediction.

关键词： Relation between earthquake frequency and magnitude Linear goodness of fitting Medium term criterion for moderately strong earthquakes

On the Large Scale Spatial Heterogeneity of Great Shallow Earthquakes and Plate Coupling Mechanism in Chinese Mainland and Its Adjacent Areas

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Earthquake Research in china 1997年第3期11卷 7-15页

作者： Fu Zhengxiang and Jiang Lixincenter for analysis and {2.,State seismological bureau,beijing 100036,china

Research on the large scale spatial heterogeneity of great intraplate shallow earthquakes on the Chinese mainland and adjacent areas discussed in this paper shows that(1)there are four main high seismicity areas:the North china seismic area in the eastern part of china(30°-42.N),the Southeastern Coast seismic area in the eastern part of china(19°-2.°N),the North-South seismic area in the western part of china and its adjacent areas(Burma-china-Mongolia),and the Central Asian seismic area in the western part of china and its adjacent areas(Pamir-Tianshan Mountains-Baikal);(2.the four intraplate seismic areas that are approximately perpendicular to those sections of the Eurasia plate boundary that surrounds the Chinese mainland and its adjacent areas,where the Eurasia plate has a strong seismic coupling with the North America-Pacific Ocean-Philippine Sea plate and the India plate; and(3)the large scale spatial heterogeneity of intraplate seismicity in china and its adjacent areas that might be

关键词： Heterogeneous seismicity Coupling mechanism Chinese mainland