jgg

大地测量与地球动力学

	Home \| About Journal \| Editorial Board \| Submission Guidelines \| \| Open Access Statement \| \| Contact Us \| 中文

Submission Online

Manuscript
Tracking

Editorial Office

Editor-in-Chief

Online befor
Printed

Search

Current Issue

	2008 Vol.28 Issue.2 Published 2008-06-06

地壳形变与地震

	1	FAR-FIELD DEFORMATION CAUSED BY 2004 SUMATRA EARTHQUAKE
		Fu Guangyu;and Sun Wenke
		The theoretical horizontal dispalcement field caused by the 2004 Sumatra earthquake in the SichuanYunnan area was calculated according to the spherical dislocation theory.The results show that the theoretical value of displacement field is basically consistent with the observed value in situ with GPS.On this basis,we have calculated the coseismic displacement field,strain field,changes of gravity and geoid of the whole Earth and China mainland and vicinity caused by the Sumatra earthquake.
		2008 Vol. 28 (2): 1-7 [Abstract] ( 3388 ) PDF (6243 KB) ( 3061 )

	8	STUDY ON CHARACTERISTICS AND SEISMIC ACTIVITY OF GAOQIAOFAULT IN HEAD AREA OF THREE GORGES RESERVOIR
		Xia Jinwu ;Li Changan ;Zeng Xinping ;and Dong Jianhui
		The property and seismicity of Gaoqiao fault is analyzed by use of geologic and seismological method．The results show：1）The scale of Gaoqiao fault is large.It is a fault at the top of the earth’s crust.The new aitivity age was earlier period of the late Pleistocenc；2）The perineability structure of the fault is distributed conduit that is useful for infiltration of underground water.3)there are obvious seismic activity before and after impoundment of the Three Gorges Reservoir along Gaoqiao fault zone；4)After impoundment,the seismicity of Gaoqiao fault behaves as a energy releasing in the form of medium frequency and low intensity；5）Gaoqiao fault is a potential seismic risk region in this area and vicinity,where will occur tectonic reservoirinduced seismicity of Ms3.0-4.0.
		2008 Vol. 28 (2): 8-15 [Abstract] ( 2336 ) PDF (3090 KB) ( 3517 )

	16	GRAVITY VARIATION BEFORE WENAN Ms5.1 EARTHQUAKE
		Sun Mingxin;Liu Shanhua and Yang Huaining
		The anomalous variation and dynamic evolution characteristics of the gravity field in the Capitol region in the seismogenic process of the Wenan Ms5.1 earthquake on July 4,2006 are studied. The results show that the updownup variations of gravity before earthquake are the obvious reflection of mediumshoutterm anomaly. The dynamic patterns of gravity field reflect clearly the evolutionary process of the gravity field: quasihomogeneous statenonhomogeneous stateearthquake occurrence.There is similar evolution characteristics of the gravity field between Wenan Ms 5.1 earthquake and of Luanxian ML5.0 earthquake on January 20,2004.
		2008 Vol. 28 (2): 16-21 [Abstract] ( 2968 ) PDF (7522 KB) ( 2897 )

	22	ANALYSIS OF PRESENT-DAY TECTONIC DEFORMATION IN SICHAN-YUNNAN AREA
		Zhou Wei;Li Yanxing ;Zhang Jinghua ;and Zhang Zhongfu
		On the basis of the analysis of velocity field, deformation field and strain field of SichuanYunnan area, we proposed the complex deformation model with coexistence of clockwise rotation around eastern Himalayan syntaxis, stretch, compress and shear deformation in SichuanYunnan area. The acting forces for the eastward extrusion of the matter in plateau and NEEward continuous wedging act of the Assam Cape are the principal drive forces.
		2008 Vol. 28 (2): 22-27 [Abstract] ( 2214 ) PDF (3037 KB) ( 3442 )

	28	ANALYSIS OF INFLUENCE FACTORS ON DAILY WAVE OR SEMI-DIURNAL WAVE OBSERVATION OF SACKS BODY STRAIN METER
		Zhang Lingkong;Niu Anfu;and Yan Wei
		We analyzed the relations between the observations with Sacks body strain meter and solid tide, atmospheric pressure, pumping and rainfall during 2003—2006 at Baodi seismostation in Tianjin. It is thought that the solid tide is the first major effect factor on the Sacks body strain observations, there is a synchronous, linear and normal correlation between them, their average value of monthly regression coefficient is 0.533, it’s time function has the annual variation characteristics. The daily or semidiurnal atmospheric pressure wave is the second major factor on the Sacks body strain observations, there is also synchronous, linear and normal correlation between them, their average value of monthly regression coefficient is 6.28×10 ^-11 /Pa, it’s time function have no obvious annual variation. Shorttime pumping near Sacks, will bring the synchronous normal interference to the daily wave, it is caused by ground water dynamics effect. Rainstorm will bring the synchronous rise of normal interference to daily wave, and the more heavy the rainfall is, the more clear this action is, it may be related with containing ample water stratum, good connectivity and dank character of the studied area.
		2008 Vol. 28 (2): 28-33 [Abstract] ( 3019 ) PDF (2263 KB) ( 3441 )

	34	ANALYSIS OF TIDE ADMITTANCE ABOUT TILT VECTOR PATTERN AT ZHANGZHOU STATION
		Li Hua;Liu Xuyan;Shao Pingrong;and Wei Yongxiang
		The tide admittance analysis for the semidiurnal wave of the earth tide by use of the vector pattern of ground tilt observed at seismostations is expounded.As an example,the tilt vector pattern at the Zhangzhou station,Fujian,was processed.The results show that the tide admittance of the semidiurnal wave in a short scale of time(one day) can be taken for a complement to the Venedicov harmonic analysis,at the same time,the picture of tilt vector pattern is helpful for tracking the characteristics of spacetime change of the anomalies before an earthquake.
		2008 Vol. 28 (2): 34-38 [Abstract] ( 2231 ) PDF (1970 KB) ( 3495 )

	39	NUMERICAL SIMULATION OF ACTIVE FAULTS IN GUANGZHOU AREA
		Li Hong;Chen Lianwang;and Li Yujiang
		On the basis of the related data of seismogeology, geophysics, focal mechanism solutions and GPS a 3D finite element model of active faults in Guangzhou area was built up to simulate recent the motion mode and the Coulomb rupture stress rate p.a. of four active faults in Guangzhou area under the given boundary condition .The computed results are as follows: the motion modes of the south and the north segments of GuangzhouConghua fault are both compressive thrust；the motion mode of the west segment of Shougouling fault is rightlateral strike slip while its east segment is dominantly rightlateral strike slip and thrust also； the motion modes of the west and the east branches of Zhujiangkou fault are both leftlateral strike slip and thrust also. The average Coulomb rupture stress rates p.a. of GuangzhouConghua fault and the east segment of Shougouling fault are evidently higher than those of the west segment of Shougouling fault and the west and the east branches of Zhujiangkou fault. The simulation results comparatively accord with the seismic activity features in this area.
		2008 Vol. 28 (2): 39-44 [Abstract] ( 3097 ) PDF (2549 KB) ( 3556 )

	45	APPLICATION OF GEOMAGNETIC LOADING-UNLOADING RESPONSERATIO METHOD TO EARTHQUAKE PREDICTION
		Zhang Jianguo;Yan Jungang ;Wang Jing ;and Qiao Ziyun
		The relation between high anomalies of Z component of geomagnetism at seimological stations in Hebei province and its neighbouring area for earthquake of Ms≥5.0 from 1982 to 2006 is analyzed with the method of loadingunloading response ratio. The result shows: 1) during the twentyfive years, ninteen anomalies coincided with the standard at Hebei geomagnetic stations had been obtained, thirteen of which respond to the Ms≥5.0 earthquakes in eleven months after the earthquakes，fifteen earthquakes should be predicted，three predictions were false and two predictions were missed;2) before most of the earthquakes the spatial distribution of maximal value of the anormalies was relatively concentrated in the vicinity of epicentral area; 3) the innercheck prediction efficiency indicator R= 0.44, passed the examination.
		2008 Vol. 28 (2): 45-50 [Abstract] ( 2765 ) PDF (3079 KB) ( 3809 )

	51	RELATIONS BETWEEN CHANGES OF GRAVITY FIELD AND Ms≥6.0 EARTHQUAKES IN WESTERN YUNNAN DURING 1998—2004
		Xu Yunma; ;Zhu Yiqing ;and Cheng Hongbin
		On the basis of the mobile gravity data in western area of Yunnan province during 1998—2004, the dynamically evolutional characteristics of gravity field in time and space are researched. The results show that 1)the changes of gravity field are closely relative to fault activity；2)the Yongshen Ms6.0, Yaoan Ms6.5 and Dayao Ms6.2,Ms6.1 earthquakes occured in the area were reflected in the sequential phase dynamic change of gravity field.
		2008 Vol. 28 (2): 51-55 [Abstract] ( 3016 ) PDF (2152 KB) ( 3671 )

	56	ANALYSIS OF SHEAR STRAIN ORIENTATION OF EARTH’S TORSIONAL OSCILLATION EXCITED BY TWO INDONESIA EARTHQUAKES
		Tang Lei;Qiu Zehua;and Kan Baoxiang
		Using observations of the YRY2 borehole shear strainmeter,we studied maximum shear strain orientation of the earth’s torsional oscillation excited by two Sumatra earthquake occurred on December 26,2004 and March 28,2005. Firstly, we did insitu calibration for the data of borehole shear strainmeter and then detected the torsional oscillations. It is found that fundamental torsional modes ₀T₁₁～₀T₁₈ were very obvious and variation trend of the two earthquakes’ amplitude were in agreement with each others,and variations of maximum shear strain orientations with time of fundamental torsional modes ₀T₁₁～₀T₁₈ of the two Sumatra earthquakes are small. Through the comparison,we found that the Dvalue of the mean measured value with theoretical anticipation value was only 2°. On the one hand,it comfirmed the theoretical model, on the other hand it also comfirmed that this observation was reliable.
		2008 Vol. 28 (2): 56-60 [Abstract] ( 2447 ) PDF (1549 KB) ( 3485 )

	61	SURFACE DEFORMATION FIELD MONITORING BY USE OFSMALL-BASELINE DIFFERENTIAL INTERFEROGRAMS STACK
		Ge Daqing;Wang Yan;Guo Xiaofang;Fan Jinghui;and Liu Shengwei
		Temporal decorrelation and phase delay are two main abstacles for repeat pass differential SAR interferometry (DInSAR) used for surface deformation monitoring. We presented an algorithm for deformation timeseries retrieval and linearrate estimation by use of short baseline differential interferograms stack. The pixel candidates presenting a good coherence level in the whole set of interferograms stack were identified and the resulting nonuniform meshes were tessellated with the Delauney triangulation to establish connections among them. The Minimum Cost Flow(MCF) algorithm was used for phase unwrapping, and the Singular Value Decompostion (SVD) method was applied to link the indenpendent interferograms subset, thus obtained the deformation timeseries of each coherent pixel. The linear deformation rate was calculated from the time series with a least square regression. Presented results achieved on ENVISAT SAR data confirms the validity of the proposed approach for longterm deformation evlution monitoring.
		2008 Vol. 28 (2): 61-66 [Abstract] ( 3568 ) PDF (3767 KB) ( 3871 )

	67	ON ICE SHEET HEIGHT CHANGES OVER ANTARCTIC FROM ALTIMETRY DATA
		Chu Yonghai;Li Jiancheng;Zhao Xiangfang ;Ma Jing ;Jin Taoyong ;and Xing Lelin;
		The mean ENVISATDEM of 3 years over Antarctic ice sheet is derived from ENVISAT altimeter data applied relocation and geophysical correction. The mean height difference between ENVISATDEM and RAMP-DEM is about 18m, it means that their accuracies are close to each other. Moreover, the height changes of several profiles over Antarctic ice sheet between 2003 and 2006 are also analyzed, the results show that the height changes are in a range of -0.31-0.17 m.
		2008 Vol. 28 (2): 67-70 [Abstract] ( 2242 ) PDF (1688 KB) ( 4080 )

理论、方法研究

	71	CONVERSION OF STRAIN TENSOR MATRICES BETWEEN TWO ORTHOGONAL CURVILINEAR COORDINATES
		Liu Xuyan ;Huang Shengming ;and Lian Quanqiang
		It is expounded and proved that all metric tensor matrixes in any orthogonal curvilinear coordinate system are diagonal matrixes,i.e. the moving trihedrons at the point in the coordinate system are rectangular and orthgonal with each other,and then it is found out that the strain tensor matrix in orthgonal curvilinear coordinate system can be calculated with the formula for strain tensor in rectangular coordinate system.At last,the universal method for strain tensor conversion in orthogonal curvilinear coordinate system and the expression of strain tensor matrix conversion between ITRF and WGS84P are given.
		2008 Vol. 28 (2): 71-76 [Abstract] ( 2831 ) PDF (436 KB) ( 4521 )

	77	COMPARISON OF INTERPOLATING AND FITTING IGS PRECISE EPHEMERIS
		Li Mingfeng;Jiang Guoyan;and Zhang Kai
		The principles of Lagrange interpolation, Neville interpolation, Chebyshev polynomial fitting and Legendre polynomial fitting were analysized compared with each other. The results indicate that the best orders of interpolating algorithm and fitting algorithm are 8 and 9 respecdively and each algorithm has the same accuracy when their orders are the same. Besides,the stage of epoch which fitting algorithm is suitable to is longer than that for interpolating algorithm in the same order.
		2008 Vol. 28 (2): 77-80 [Abstract] ( 2881 ) PDF (774 KB) ( 3845 )

	81	APPLICATION OF ROBUST ESTIMATION TO CHAMP GRAVITY FIELD RECOVERY
		Xu Tianhe; and He Kaifei
		A numerical simulation was made to examine the influence of outliers on CHAMP gravity field recovery. It shows that the model accuracy from least square ( LS) estimation is wholly decreased even if with only one large outlier occurs, and there is a large bias in geoid heights in the large area around the location where the outlier exists. In order to overcome this problem, robust estimation is intruduced into the CHAMP gravity field recovery and its influence function of errors is also given.For one month CHAMP rapid science orbit(RSO) and accelerometer data from GFZ with randomly added to simulated outliers from 5 to 100 m ²s ^-2 two 60×60 degree gravity field models were solved by LS and robust estimation individually and compared with other models such as EIGENCG03C,EIGEN2. The results show that the robust solution can efficiently control the influence of the outliers. ROCHAMP model is obviously more accurate than LSCHAMP one, and more accurate than EGM96, EIGEN1S, and EIGEN2 at the same degree and order.
		2008 Vol. 28 (2): 81-85 [Abstract] ( 2160 ) PDF (1055 KB) ( 3243 )

	86	ESTABLISHMENT OF ROBUST DATUM OF ANALYSISOF REGIONAL CRUSTAL DEFORMATION
		Shi Yimin; and Luo Yan
		n order to indicate actual displacement objectively and reasonably, a robust estimation with minimum first order norm of displacement component is offered to determine relative stability displacement, and it does not have to make any assumption for deformation of points, being different from ordinary quasistable adjustment.A new form of geodetic coordinates is adopted to express displacement for effectively judging relative stable points with horizontal and vertical orientation. Two stages of data from GPS deformation monitoring net in Shanghai area are calculated with this method to prove that this method is feasible and effective for strain analysis.
		2008 Vol. 28 (2): 86-91 [Abstract] ( 2296 ) PDF (625 KB) ( 4331 )

	92	A NEW METHOD FOR 3D CIRCULAR OBJECT FITTING
		Pan Guorong;and Chen Xiaolong
		The existing methods for 3D circular object fitting are introduced and a new method of more concise and faster is put forward to fit 3D circular objects by data conversion and least square adjustment. The defects of previous methods are avoided with this new method. The validity of this method is verified by an example in a subway tunnel shield engineering.
		2008 Vol. 28 (2): 92-94 [Abstract] ( 2069 ) PDF (735 KB) ( 3746 )

	95	NORMAL AND INVERSE SOLUTION OF EQUIVALENT DIFFERENCELATITUDE PARALLEL POLYCONIC PROJECTION OF WORLD MAP
		Dong Man;and Li Shengle;
		As the world map which is published on the net by State Bureau of Surveying and Mapping has no the concrete projection parameters and the normal and inverse transformation formulae, it is difficult to project the geoinformation to the map. We derived the formulae of the normal and inverse solution of equivalent difference latitude parallel polyconic projection. Throught choosing the reference points, and computing the projection parameters from the coordinate values of reference points, people can make the transformation of geoinformation according to the normal and inverse transformation formulae, and project the dots, lines or panels to the map easily.
		2008 Vol. 28 (2): 95-99 [Abstract] ( 3315 ) PDF (3201 KB) ( 5810 )

	100	A CONVERSION METHOD OF GPS HEIGHT BASED ON Kriging ALGORITHM AND WAVELET
		Jiao Minglian;and Jiang Tingchen
		A conversion method of GPS geodetic height to normal height by using Kriging algorithm based on wavelet transform is proposed in this paper. It was not only studied how the wavelet method combining with Kriging algorithm and used in GPS height conversion, but also a GPS height example was analyzed. It is pointed that accuracy of conversion is about the order of 3cm. The results indicate that GPS normal height is gained by the method and it can be referenced and utilized.
		2008 Vol. 28 (2): 100-103 [Abstract] ( 3048 ) PDF (785 KB) ( 3355 )

	104	A NEW METHOD FOR SOLUTION OF SEVEN-PARAMETERTRANSFORMATION BETWEEN 3D AND 2D SPACES
		Xie Mingyu ;and Yao Yibin
		A new method which is called Height Substitution Circular Method is put forward aimed at the solution of the sevenparameter transformation between 3D and 2D spaces with unknown height. The feasibility and the applicability of this method are proved through processing the real data and the simulated data. The results show that when both the ranges of longitude and latitude are less than 8°,both the coordinate differences in \%x\% and \%y\% direction are about 1 cm and the accuracy is obviously improved with the range reduction of longitude and latitude especially the range reduction of latitude.
		2008 Vol. 28 (2): 104-109 [Abstract] ( 2222 ) PDF (382 KB) ( 3696 )

	110	DETERMINATION OF COORDINATE TRANSFORMATION PARAMETERS BY ADAPTIVELY SEQUENTIAL ADJUSTMENT METHOD WITH CLASSIFIED ADAPTIVE FACTORS
		Zhang Liping; and Zeng Anmin;
		In order to utilize the prior information of similarity coordinate transformation parameter fully and availably and improve the accuracy of coordinate transformation at the same time, we put forward a new method using adaptively sequential coordinate transformation with classified adaptive factor to calculate the coordinate transformation parameters in different region. According to the parameters of different type and different dimension, the different adaptive factors are constructed. An example of practical data processing shows that the adaptively sequential coordinate transformation with classified adaptive factor is superior to the sequential coordinate transformation in threedimensional coordinate transformation.
		2008 Vol. 28 (2): 110-114 [Abstract] ( 2092 ) PDF (453 KB) ( 3927 )

	115	APPLICATION OF CHAOTIC TIME SERIESLEAST SQUARE SUPPORT VECTOR MACHINE IN DAMS’ SAFETY MONITORING PREDICTION
		Zhao Qing ;Li Xiao ;Xu Jinjun ;and Mi Tianyue
		A new model (chaotic time series-least square support) is put forward for solving the problem of medium-long time prediction by use of the dam’s nonlinear deformation data affected by the outer factors. Firstly, the nonlinear deformation data’s phase space is reconstructed based on the phase space reconstruction theory. Then LSSVM (Least Square Support Vector Machine) is used to model and make the mediumlong time prediction from the data in the reconstruction phase space integrated with the outer factors based on the statisticslearning theory. An example testifies the model is effective.
		2008 Vol. 28 (2): 115-119 [Abstract] ( 2964 ) PDF (824 KB) ( 3736 )

	120	MULTI-FREQUENCY COMPONENT ANALYSIS OF BUILDING VIBRATION MEASURED WITH RTK-GPS
		Gu Chuan ;Wang Lihua;and Wan Jun
		The RTK-GPS(Real Time Kinematic Gloabal Position System) technique which can be used in the building multi-frequency vibration measurement, and a signal parameter identification method for the analysis of building multifrequency vibration component is proposed. An actual engineering example testifies that RTK-GPS technique can meet the precision needs of building multifrequency vibration measurement and the proposed method for analyzing its multi-frequency components is feasible.
		2008 Vol. 28 (2): 120-122 [Abstract] ( 2471 ) PDF (440 KB) ( 3794 )

观测技术

	123	PRINCIPLE AND ANALYSIS OF FIELD BASELINE DESIGN FORELECTRONIC DISTANCE MEASURING INSTRUMENTS
		Yang Weifang; ;and Yang Boxiong
		An analysis of three types of available baseline design is presented, after reviewing the principles of field baseline design for Electronic Distance Measuring (EDM) instruments. It is concluded that the baseline for a certain unit length of EDM instrument cannot be wholly appropriate for the test of other EDM instruments with different unit lengths.
		2008 Vol. 28 (2): 123-126 [Abstract] ( 2059 ) PDF (434 KB) ( 3554 )

	127	ACCURACY ESTIMATE OF MOBILE SLR AT URUMCHI STATION
		Zhu Fuying;Wu Yun;Du Ruilin;and Zhang Nian;
		On the basis of the mobile SLR observations for satellites LAGEOS1,BeaconC,Jason1 at the Urumchi station in 2005 , the precise orbit determination of LAGEOS1 and the bias error were analyzed and then the range bias, time bias and ranging accuracy at the station were given. It is concluded that the average observational accuracy is better than 2 cm, and thus the requirement for the precision of instrument design is achieved well.
		2008 Vol. 28 (2): 127-131 [Abstract] ( 2417 ) PDF (1102 KB) ( 4150 )

	132	CALIBRATION OF SCALE VALUE FOR LaCoste&Romberg AIRBORNE GRAVIMETER
		Sun Zhongmiao ;Li Yingchun ;Zhang Songtang ;and Wang Yingjian
		LaCoste&Romberg airborne gravimeter is the key equipment of the Chinese airborne gravimetry system. On the basis of the characters of the airborne gravimetry, the calibration method of the meter factor for the airborne gravimeter is discussed and the formula for computing the meter factor was derived. Thus,a new meter factor is determined using actual calibration data. The validation of the new meter factor is verified using the real airborne data from the Datong test. The results indicate that the systemic biases of the airborne gravity disturbance compared to ground reference can be reduced about 1×10 ^-5 ms ^-2 by use of the new meter factor.
		2008 Vol. 28 (2): 132-135 [Abstract] ( 3093 ) PDF (701 KB) ( 3094 )

·

·

·

·

·

·

More...

·

·

·

·

·

·

More...

Copyright © 2013 Editorial office of jgg
Supported by: Beijing Magtech