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.3 Published 2008-08-21

地壳形变与地震

	1	EFFECT OF KUNLUN Ms 8.1 EARTHQUAKE ON CRUSTAL DEFORMATION IN NORTHEASTERN MARGIN OF QINGHAITIBET PLATEAU
		Cui Duxin;Wang Qingliang;and Wang Wenping
		The seismic fault parameters can be inversed with Okada model based on the deformation data before and after earthquakes in the focal region and its adjacent area. Coseismic displacements are simulated by use of these parameters and then the regional velocity field is obtained by deducting the coseismic displacements from the GPS observation displacements. We processed and analyzed the data in northeastern margin of the QinghaiTibet plateau observed during 2001-2003 in two steps: firstly, simulated the displacements generated by Kunlun Ms8.1 earthquake occurred in 2001 in this region, and then obtained the horizontal crustal velocity field by deducting the coseismic displacements. The results reveal: 1) the effect of Kunlun Ms8.1 earthquake on the northeastern margin of QinghaiTibet plateau is obvious; 2) the velocity field obtained with this method is better than the original GPS velocity field for reflecting the status of regional crustal movements and strain.
		2008 Vol. 28 (3): 1-8 [Abstract] ( 3052 ) PDF (6296 KB) ( 3532 )

	9	ON MICRO-DYNAMIC DEFORMATION INFORMATIONS OBTAINED FROM GPS OBSERVATIONS DURING KUNLUNMOUNTAIN Ms 8.1 EARTHQUAKE IN 2001
		Hou Hesheng;and Jiang Zaisen
		By means of the synthetic model for rigid movement and strain of the introplate blocks, and through computing the accumulated difference displacements derived from the observation fiducial GPS stations in the northeastern edge of QinghaiTibet block, the dynamic variations of the continuous deformation parameters in this area are obtained. The results show that there was coherent vary tendency between these parameters before and after the KunLun Mountains \%M\%s 8.1 earthquake, it is discovered that the four time series, the eastwestward strain, the least principal strain, the superficial expansion rate and the second shear strain are significant. The mechanism of strain releasing and adjustment induced by the earthquake in the area can be interprated with this Model. It is possible to identity imminent anomalies of a large earthquakes in the region by assembling deformation parameters.
		2008 Vol. 28 (3): 9-13 [Abstract] ( 2181 ) PDF (953 KB) ( 3316 )

	14	RELATIONSHIP BETWEEN FAULT DEFORMATION AND EARTHQUAKES IN NORTH CHINA
		Guo Liangqian;Ma Qing;Du Xuesong;and Sun Dongying
		The background deformation crustal velocity of North China in the period from 1985 to 2006 was calculated with the linear fitting method. Anomalydistinguishing scanning was made one iterm after another and the data including crossfault deformation observation anomaly amount and anomaly frequency were calculated according to the zones or areas. The results indicate that about one year before earthquakes of M≥6.0, anomaly frequency became larger and earthquake often occurred during or after the progress of highfrequency anomaly. There is also certain reflections of the anomaly frequency on earthquakes of M≥5.0.
		2008 Vol. 28 (3): 14-20 [Abstract] ( 2105 ) PDF (4645 KB) ( 3714 )

	21	MULTIPLE REAPPEARANCE OF EARTHQUAKE PRECURSOR ANOMALIES MEASURED BY YONGSHENG FIXED-POINT DEFORMATION MEANS
		Chen Defu ;Chen Jing ; and Yang Xing
		The observations for 21 and 25 years have been accumulated respectively at Yongsheng tilt tide deformation station and the vertical deformation station across Chenghai fault,which is 2.8 km apart from Yongsheng station in SWW direction. After processing these data by use of a variety of methods for recognizing and extracting the abnormal information, it is found that there had been reappearances of abnormal information of Ms≥6.0 strong earthquakes 4 times during 1995-2001. Their patterns are “leftsteep and rightgentle (W tilt as stair) type”, “downpeakreflex type”, “symmetrical concave downward type” respectively; the magnitudes are≥1.00 and ≥9 mm respectively; the time: the latter is 4-6 months earlier than the former; the epicentral distances are ≤140 km.Thus we drew up the guides to the mediumshortterm prediction at above two sensitive points for monitoring strong earthquakes.
		2008 Vol. 28 (3): 21-26 [Abstract] ( 2994 ) PDF (1802 KB) ( 3606 )

	27	EXTREME VALUE RISK MODEL ADAPTED TO SPARSEDATA IN SOUTHEASTERN CHINA OF LOW SEISMICITY
		An Weiping ;Qin Changyuan ;and Gen Ailing
		The Gumbel extreme model, especially the third distribution G(M)=exp [-((ω-m)/(ω-μ))^1/λ] is used usually to earthquake risk research because of its prominent advantages, such as the upper bound to magnitude ω etc. Due to the complications of nonlinearity and the limitation of sparse observations, however, its importance has been largely underestimated. The methodology developed here concentrates on two aspects: exploring widening and adaptable use of the observations and finding the proper starting parameters to guarantee the convergence in the nonlinear fitting. Moreover,this new method makes it possible to study the occurrence pattern of large earthquakes in low seismicity regions. In order to expound the distinctive advantage of this method, two data sets from different seismotectonic backgrounds, a low seismicity region from southeastern China and a high seismicity region from western Greece, are analysed. Both of these results are good and stable, as with low fitting errors.
		2008 Vol. 28 (3): 27-35 [Abstract] ( 2870 ) PDF (1972 KB) ( 2636 )

	36	CHARACTERISTICS OF THERMAL INFRARED RADIATION ALONG ALTYN FAULT BY NOAA SATELLITE
		Guo Weiying ;Zhang Jiayong ;and Gao Li
		By use of the thermal infrered image with the resolution of 1 km the linear fecture of Altyn fault is studied.The results show that the picture contrast between two walls of the faults is large and the topographic dissection degree on the fault sides is strong.In addition,the contrast in the west section is larger than that in the east section,it proves that the activity of the west section is stronger than that in the east one,and the comparison between the infrared radiation brightness temperature in the fault and the data of the DEM in an year period reflectes that the mean brightness temperature of the pixels of the northern side is 5-8 K higher than that of the southern side and keeps a good negtive correlation to the topography.
		2008 Vol. 28 (3): 36-40 [Abstract] ( 2937 ) PDF (2437 KB) ( 3379 )

	41	STUDY ON GAUSSIAN SMOOTHING OF GRACE TEMPORAL GRAVITY VARIATION
		Zhou Xin;Xing Lelin;Zou Zhengbo;and Li Hui;
		Two methods isotropic Gaussian filter and nonisotropic Gaussian filter of GRACE temporal gravity variation smoothing, and their properties are studied. With these methods, the global geoid change between January and February 2006 was computed. The results show that nonisotropic Gaussian filter’s spectrum depends not only on degree but also on order; the nonisotropic smoother yields enhanced GRACE signals with significantly higher spatial resolution in latitude and the same resolution in longitude without reducing the accuracy as compared to isotropic Gaussian filter.
		2008 Vol. 28 (3): 41-45 [Abstract] ( 2337 ) PDF (2574 KB) ( 4455 )

	46	RECOGNITION BASED ON DEM OF GEOMORPHOLOGIC TYPE OF KARST DRAINAGE
		He Zhonghua ;Liang Hong ;Huang Fasu ;and Zhao Fang
		Twenty nine karst drainages are chosen for analysis of the five factors which affect the growth of geomorphologic type,and the choice is based on the TM image,CBERS image and DEM data which are extracted by use of RS and GIS techniques and from the ASTER image of Guizhou Province.This research procedure includes the extraction of 24 indices,data processing and multivariate regression analysis by means of softwares SPSS and MATLAB and proposing the mathmatical models for recognition of different geomorphologic type of karst drainage and then the very good recognational effect can be obtained through varience analysis and sample zone checking.
		2008 Vol. 28 (3): 46-53 [Abstract] ( 3092 ) PDF (9282 KB) ( 3246 )

理论、方法研究

	54	GMDH NN ALGORITHM AND ITS APPLICATION IN DEFORMATION FORECASTING
		Pan Guorong;and Gu Chuan
		Aiming at several defects of GMDH NN(neural network), this paper has done some improvements on the aspects of preselection of initial variables number, constitute of partial expression, choice criterion of middle variables, stopping principle, and realized it with Matlab language. Applying the improved GMDH NN in nonlinear deformation data forecasting, and comparing the shortterm and longterm forecasting result with those obtained with BP NN and GMDH NN, in this paper, it is concluded that improved GMDH NN has preferable practicality and its forecasting precision has enhanced.
		2008 Vol. 28 (3): 54-58 [Abstract] ( 2056 ) PDF (874 KB) ( 4373 )

	59	GPS KINEMATIC POSITIONING BASED ON PHASE SMOOTHING PSEUDORANGE AND DOPPLER DATA
		Zhou Zebo ;Shen Yunzhong;and Li Bofeng
		In order to improve the positioning accuracy and reliability, it is necessary to use information from neighboring epodes or other kinds of possible measurements.On the basis of the analysis of function model and stochastic model in a chosen time window the extended Kalman filtering (EKF) recursive equations for in the cases with and without Doppler measurements were derived and compared with each other by use of real vehicular GPS data. The result shows that the PSP can indeed reduce the measurements noise and thus improve the positioning accuracy, while the EKF with Doppler measurements can significantly enhance the accuracy and reliability in elevation component.
		2008 Vol. 28 (3): 59-63 [Abstract] ( 2340 ) PDF (11788 KB) ( 2743 )

	64	MEASURING CRITERION FOR NONLINEARITY DEGREE ANDESTIMATION PERFORMANCE OF NONLINEAR FILTRATION
		Gong Yisong ;Gui Qingming ;Sun Fuping ; and Li Hui
		A quantitative measuring criterion for degree of nonlinearity in the nonlinear filtering problem based on the generalized mean square error is presented and the feasibility of this criterion is proved by a simulated example.
		2008 Vol. 28 (3): 64-66 [Abstract] ( 2110 ) PDF (998 KB) ( 3136 )

	67	ANALYSIS OF PARAMETERS INVERSION OF FAULTDISLOCATION MODEL BASED ON MATRIXSINGULAR VALUE DECOMPOSITION
		Li Minfeng;and Wu Jicang
		Matrix singular value decomposition is used for studying the distribution of Singular Values of the observation equation coefficient matrix in inverting of fault dislocation parameters from measured displacement. The effect of relative position of surveying network to the fault on the inversion results has been studied. The results of simulative examples show that the surveying network should be distributed around the center of the fault monitored so as to improve the stability of inversion.
		2008 Vol. 28 (3): 67-71 [Abstract] ( 2069 ) PDF (1110 KB) ( 3449 )

	72	APPLICATION OF BP NEURAL NETWORK BASED ON PRINCIPAL COMPONENT ANALYSIS IN DEFORMATION FORECASTING
		Chen Xingquan ;Wang Jiexian;and Gu Chuan
		In order to improve deformation forecasting precision, application of principal component analysis and improved BP neural network in deformation monitoring is proposed. For the verification if the new method can enhance the precision and reliability of forecasted data, the proposed algorithm is programmed and verified by use of measured data. The results show that compared with other methods, the improved BP neural network based on principal component analysis can achieve better foresting results.
		2008 Vol. 28 (3): 72-76 [Abstract] ( 2194 ) PDF (871 KB) ( 3314 )

	77	COMPARISON BETWEEN LEAST SQUARE COLLOCATION AND ORDINARY KRIGING
		Yao Daorong ;Zhong Bo;Wang Haihong;and Wang Wei
		The methods of least square collocation and ordinary Kriging are introduced, and then the similarities and differences between them in the supposing condition,estimate criterion and characters of estimate value are pointed out. The performance and accuracy estimated by collocation and ordinary Kriging are compared through an example of simulated gravity anomaly data with different observation errors and data resolution. The results show that the effect of observation error on the accuracy estimated by Kriging is greater than that by collocation under the same data resolution, and the effect of data resolution on the accuracy estimated by collocation is greater than that by Kriging under the same observation error. Finally, the two prediction techniques are applied to fit the height anomaly in a local area, the result indicates that the Ordinary Kriging is also an effective method for refining the local geoid.
		2008 Vol. 28 (3): 77-82 [Abstract] ( 3520 ) PDF (2978 KB) ( 4943 )

	83	REGULARIZATION COMBINED WITH ROUST ESTIMATIONAND ITS APPLICATION FOR GPS RAPID POSITIONING
		Chang Zhiqiao;Hao Jinming;Zhang Chengjun;and Cui Jianyong
		In order to solve the problems of the normal equation being ill-conditioned and observations containing outliers in GPS rapid positioning, a new robust estimateregularized robust estimate based on the idea of robust Mestimation is proposed. Under this method can solve the robust estimation of illposed problems in geodesy. The computation results of GPS data show that the new estimator has the characteristics of resisting outliers, high precision and good stability.
		2008 Vol. 28 (3): 83-86 [Abstract] ( 2281 ) PDF (350 KB) ( 3395 )

	87	PARTICLE FILTER BASED ON ADAPTIVE UNSCENTED KALMAN FILTER
		Nie Jianliang
		In order to improve the quality of sampling,the use of adaptive Unscented Kalman filtering (AUKF) for importance sampling in particle filter is researched as the standard particle filter has degeneracy. The adaptive factor based on adaptive filtering is used to adjust the proportion of observation and dynamic model of Unscented Kalman filtering (UKF), and to make the covariance of the predicated vector approach the true value. This way,it can improve the accuracy of importance sampling, and further improve the accuracy of particle filters. The precision of particle filter using adaptive UKF is the best among the improved particle filter by use of sequential importance sampling (SIS), extended Kalman filtering (EKF), adaptive extended Kalman filtering (AEKF), Unscented Kalman filtering (UKF) and adaptive Unscented Kalman filtering (AUKF) for importance sampling in a simulated example. It has been proveed that particle filter taking adaptive UKF as importance sampling function is a kind of efficient way to improve the precision of particle filter.
		2008 Vol. 28 (3): 87-91 [Abstract] ( 2339 ) PDF (726 KB) ( 3306 )

	92	RESEARCH ON DATUM UNIFICATION OF MULTI-SATELLITE ALTIMETRIC DATA
		Jin Taoyong ;Li Jiancheng ;Xing Lelin;and Chu Yonghai
		The methods for datum unification of multisatellite altimetric data were studied and given, and the transfer parameters between several altimetric system were calculated from edited and corrected altimetric data. Finally, a mean sea surface model of China Sea are established after data unification and crossover adjustment. Compared with CLS01, KMS04 and WHU2000 mean sea surface models, the validity and credibility of mean sea surface model of China sea and the transform method and parameters are verified.
		2008 Vol. 28 (3): 92-95 [Abstract] ( 2066 ) PDF (929 KB) ( 3504 )

	96	EVALUATION OF INTERPOLATION RESIDUAL ACCURACY WITH MIDPOINT OF CHECK LINES IN MARINE MAGNETIC SURVEY
		Bian Gang;Liu Yanchun; Bian Guanglang; Yu Bo;and Xiao Fumin
		In order to improve the accuracy of magnetic diagram from marine magnitic surveying the evaluation method of the interpolation residual accuracy with midpoint of the crosscheck lines was brought forward, and the relation between the interpolation residual accuracy and line spacing was analyzed. The study shows that the method can make full use of information along the check lines, the interpolation ability between the lines can be really reflected but the interpolation residual accuracy will reduce with the increase of the line spacing.
		2008 Vol. 28 (3): 96-99 [Abstract] ( 2273 ) PDF (1422 KB) ( 3410 )

	100	LAMBDA METHOD APPLIED TO PHASE UNWRAPPING IN CR-InSAR
		Long Jiangping ;Ding Xiaoli ;Li Zhiwei ;Xiang Rong ;and Feng Guangcai
		As using corner reflectorsynthetic aperture radar interferometry (CRInSAR) to monitor surface deformation, the integer parts of observed phase are lost. In order to obtain the integrated phase of deformation, it is necessary to unwrap phase. This paper studied the phase unwrapping problem of CRInSAR, and made tests to apply the least squares ambiguity decorrelation adjustment method which is successfully applied in GPS ambiguities resolution to solve the problem of phase unwrapping according to modified model. On the basis of real data the unwrapping method is tested and reliable results are achieved.
		2008 Vol. 28 (3): 100-103 [Abstract] ( 3237 ) PDF (369 KB) ( 3471 )

	104	PLATE MOVEMENT PARAMETER DETERMINATION WITH SEMIPARAMETRIC MODEL
		Ming Feng; and Chai Hongzhou
		In order to surmount many deficiencies in determining the parameters of plate movement by least square(LS) method , we have set up a semiparametric model based on compensated LS principle. With this model, the Euler vectors of the main plates were calculated by use of the ITRF2005 velocity. Through comparison with the NNRNUVEL1A model we found that both of these models are consistent with each other when the observation stations are symmetrically distributed and the station numbers are enough. Moreover, the semiparametric model has more expositive capabilities than that of the LS method.
		2008 Vol. 28 (3): 104-107 [Abstract] ( 3040 ) PDF (383 KB) ( 3751 )

	108	WAVELET ANALYSIS OF RELATIONSHIP BETWEEN MINING SPEED AND MINE-INDUCED SEISMICITY
		Wang Wei;Jiang Yan ;Ning Jinsheng; and Zhong Bo
		Mineinduced seismicity is mainly affected by the mining activities and the structural environment as well as the regional structure stress field where the mine is located. Applying wavelet multiresolution analysis we found that there is very strong relationship between mining speed and mineinduced seismicity. On the basis of this relationship, we proposed controlling the mining speed to reduce mineinduced seismicity. The feasibility of using the mining velocity curve to forecast mineinduced seismicity is analyzed with concrete forecast data. Experiment shows that with a slower and uniform mining speed the mineinduced seismicity can be reduced effectively.
		2008 Vol. 28 (3): 108-111 [Abstract] ( 2842 ) PDF (1251 KB) ( 3808 )

观测技术

	112	EXPRESSION OF MAXIMUM PERMISSIBLE ERROR FOR TILT METER
		Chen Zhiyao;and Li Shude
		It was the first time to take the maximum permissible error as the major specifications of the crustal deformation observation instrument in compiling the seismological industry standard. The specification is named the Technical requirements of instruments in network for earthquake monitoring-The instrument for crustal deformation observation. The maximum permissible error is the unique basis to judge the qualification of tilt instrument. According to the expression set from the Guide to the Expression of Uncertainty in Measurement, the judgment and the expression of the maximum permissible error of the tilt meter and strain meter have been determined. Finally,the expression of the uncertainty of measurement and the qualified judgment calculation are introduced.
		2008 Vol. 28 (3): 112-117 [Abstract] ( 2995 ) PDF (661 KB) ( 3028 )

	118	DESIGN OF EMBEDDED ETHERNET INTERFACE SYSTEM\=[JZ] OF EARTHQUAKE PRECURSOR INSTRUMENT
		Deng Tao ;Liao Chengwang;Ou Tonggeng ;Li Shengle ; and Xiang Dapeng
		In the light of the characteristics and operational condition of the seismic precursor DSC data acquisition device at the “Ninth FiveYear Plan” period——an embedded ethernet communication interface equipment,the EP95 IP data acquisition device based on TCP/IP protocol is developed. The working mode of seismic precursor device at the “Ninth FiveYear Plan” period was transformed to the mode fitting the criterion for“Tenth FiveYear Plan” ,thus making it support WEB and command control and,finally,it will be convenient for unified management,data sharing and exchange.
		2008 Vol. 28 (3): 118-122 [Abstract] ( 2980 ) PDF (1687 KB) ( 3740 )

	123	DESIGN OF COMMUNICATION SOFTWARE OF PRECURSORINSTRUMENTS FOR NINTH FIVE-YEAR PLAN
		He Anhua;Zhao Gang;Wang Jun;Guo Miaoxi;and Guo Bailin
		Taking the communication standard for precursor instruments in the Ninth FiveYear Plan as the communication agreement and Visual C++6.0 as the development environment,a multifunctional communication software for precursor instruments in the Ninth FiveYear Plan is designed to fulfill the control and the data acquisition of the instruments with various accessing modes.
		2008 Vol. 28 (3): 123-128 [Abstract] ( 2061 ) PDF (3320 KB) ( 3466 )

科研简报

	129	GRAVITY DISTURBANCE BEFORE WENCHUAN Ms8.0 EARTHQUAKE
		Hao Xiaoguang;Hu Xiaogang;Xu Houze;Zhong Min;Fang Jian;Hao Xinghua;Liu Min;Liu Genyou;and Xue Huaiping
		After having deserved the significant gravity disturbance before the Kermadec Islands earthquake (Mw 7.1) on May 27,1997 at Zhongshan station in Antarctica with LacosteET21 gravimeter, and observed the similar disturbance before the Wenchuan earthquake ( Ms 8.0) on May 12,2008 at the Wuhan National Field Scientific Observation Station for Geodesy with LacosteET20 gravimeter. The analysis of the gravity data of the Wenchuan earthquake shows that the gravity disturbance had been gradually increasing since two days before the earthquake with the maximum amplitude of about 0.8×10 ^-8 ms ^-2. The observations of gravity disturbance before earthquake are reliable, as the anomaly was observed at different sites with different LacosteET gravimeters. It is concluded that the significant gravity disturbance appear usually about two days before some strong earthquakes with the amplitude of (1~2)×10^-8 ms^-2 and the period of 4-8 s.
		2008 Vol. 28 (3): 129-131 [Abstract] ( 3093 ) PDF (1699 KB) ( 4069 )

	132	DEFORMATIONS CAUSED BY WENCHUAN EARTHQUAKE IN THREE GORGES AND BEIJING AREAS
		Fu Guangyu
		The co-seismic displacements, strains, geoid and gravity changes caused by the Wenchuan Ms8.0 earthquake in Three Gorges and Beijing areas were calculated respectively. Compared with that caused by the Surmatra earthquake in 2004, in Three Gorges area the coseismic displacements are about a half but the strains are about 2-3 times. In Beijing area the deformations are smaller than those of the 2004 Sumatra earthquake by 1-2 orders,totally. Thus, the possibility of strong induced earthquake is low in Three Gorges area, and is zero in Beijing area.
		2008 Vol. 28 (3): 132-135 [Abstract] ( 2843 ) PDF (1074 KB) ( 3351 )

·

·

·

·

·

·

More...

·

·

·

·

·

·

More...

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