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Science china Earth Sciences 2005年第12期48卷 2092-2103页

作者： DING Shijiang1, HU Jianmin2, SONG Biao3.4, CHEN Mulun1, XIE Shengzhou1 & FAN Yuan1 1. Geological surveying Institute of Hainan, Haikou 570206, china 2. Institute of Geomechanics, Chinese Academy of Geological Sciences, beijing 100081, china 3. beijing Center of SHRIMP, beijing 10003., china 4. Institute of Geology, Chinese Academy of Geological Sciences, beijing 10003., china 1. Geological surveying Institute of Hainan 570206 Haikou China 2. Institute of Geomechanics Chinese Academy of Geological Sciences 100081 Beijing China 3. beijing Center of SHRIMP 100037 Beijing China 4. Institute of Geology Chinese Academy of Geological Sciences 100037 Beijing China

The petrological and geochemical features of the bed parallel granitic intrusion in the Pre-Cambrian Baoban group in Hainan Island attest to the anatexis origin of the granites. U-Pb dating analyses of zircons from the anatectic granite and the biotite two-feldspar gneiss in the Baoban group, using SHRIMP II in the beijing Ion-probe Center, acquire 206Pb/23.U ages of 3.8±3.5 Ma (of granite, 95% confidence level, MSDW=1.23. and 3.2.9±6.1 Ma (of gneiss, 95% confidence level, MSDW = 2.04) respectively. The two late Devonian ages indicate consistently a tectonic- thermal event experienced in Hainan Island, and are the first discovered record of the Devonian geological process in the district. This event possibly resulted from the deep ther-mal-dynamic process when the Gondwana continent began to break up in the Devonian period.

关键词： Hainan Island, Devonian period, anatectic granite, zircon SHRIMP U-Pb dating.

Fast algorithm based on triplet Markov fields for unsupervised multi-class segmentation of SAR images

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Science china(Information Sciences) 2011年第7期54卷 1524-1533页

作者： WU Yan 1,WANG Xin 1,XIAO Ping 2,GAN Lu 1,LIU ChunYan 1 & LI Ming 3.1 School of Electronics Engineering,Xidian University,Xi’an 710071,china 2 Shaanxi Bureau of surveying & mapping,Xi’an 710054,china 3.National Key Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,china 1. School of Electronics Engineering Xidian University Xi’an 710071 China2. Shaanxi Bureau of Surveying & Mapping Xi’an 710054 China3. National Key Laboratory of Radar Signal Processing Xidian University Xi’an 710071 China

Non-Gaussian triplet Markov fields (TMF) model is suitable for dealing with multi-class segmentation of non-stationary and non-Gaussian synthetic aperture radar (SAR) *** the complexity of the model and algorithm,as well as the requirement of real-time,and robust and efficient processing of SAR images,a fast algorithm based on TMF for unsupervised multi-class segmentation of SAR images is proposed in this *** the speckle noise in SAR images,numerical characteristic,threshold selection and QuadTree decomposition criterion are researched *** the new method,a SAR image can quickly be mapped into an edge-based pixon-representation,which results in a coarse decomposition in smooth regions,and a fine decomposition in *** by combining TMF model with the pixon-representation of SAR image,a new potential energy function of TMF based on pixon-representation is ***,the segmentation is finished by Bayesian maximum posterior mode (MPM).The effectiveness of the fast TMF algorithm is demonstrated by applying it to simulated data and real SAR images.

关键词： pixon-representation of SAR image QuadTree decomposition new potential energy function triplet Markov fields multi-class segmentation

Post-earthquake assessment of building damage degree using LiDAR data and imagery

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Science china(Technological Sciences) 2008年第S2期51卷 133-143页

作者： LI ManChun1,CHENG Liang1,2,GONG JianYa2,LIU YongXue1,CHEN ZhenJie1,LI FeiXue1,CHEN Gang1,CHEN Dong1 & SONG XiaoGang3.1 Department of Geographic Information Science,Nanjing University,Nanjing 210093.china 2 State Key Laboratory of Information Engineering in surveying,mapping and Remote Sensing,Wuhan University,Wuhan 43.079,china 3.State Key Laboratory of Earthquake Dynamics,Institute of Geology,china Earthquake Administration,beijing 100029,china Department of Geographic Information Science Nanjing University Nanjing 210093 China State Key Laboratory of Information Engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China

Various methods have been developed to detect and assess building's damages due to earthquakes using remotely sensed *** the launch of the high resolution sensors such as IKONOS and QuickBird,it becomes realistic to identify damages on the scale of individual *** the low accuracy of the results has often led to the use of visual interpretation ***,it is very difficult to estimate the degree of building damage(*** damage,moderate damage,or severe damage) in detail using the existing ***,a novel approach integrating LiDAR data and high resolution optical imagery is proposed for evaluating building damage degree *** approach consists of two steps:3. building model reconstruction and rooftop patch-oriented 3. change ***,a method is proposed for automatically reconstructing 3. building models with precise geometric position and fine details,using pre-earthquake LiDAR data and high resolution ***,focusing on each rooftop patch of the 3. building models,the pre- and post-earthquake LiDAR points belonging to the patch are collected and compared to detect whether it was destroyed or not,and then the degree of building damage can be identified based on the ratio of the destroyed rooftop patches to all rooftop *** novelty of the proposed approach is to detect damages on the scale of building's rooftop patch and realize quantitative estimation of building damage degree.

关键词： post-earthquake assessment building damage degree rooftop patch LiDAR imagery

A BRIEF APPRAISAL ON china GRAVIMETRIC STANDARD

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Chinese Science Bulletin 1989年第7期34卷 588-591页

作者：江志恒 Research Institute of surveying and mapping Beijing

Since the beginning of this century, two international gravimetric standards have been adopted, the Potsdam system in 1909 previously and the International Gravity Standardization Network 1971 at present. The first gravity basic net of china was established in 1957 （CGBN57）. It consisted of 22 basic stations on the base of the Potsdam system with relative measurement accuracy of±0.15×10-5 ms-2.

关键词： china Gravity Basic Net 1985(CGBN85) china Gravity Basic Net 1957(CGBN57) china Gravity First-order Net(CGFN).

china GRAVITY BASIC NET 1985

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中国科学B辑(英文版) 1988年第9期31卷 1143-1152页

作者：江志恒左传惠丘其宪徐善 Research Institute of surveying & mapping china National Bureau of surveying & mapping beijing beijing

The china Gravity Basic Net 1985 （CGBN85） which comprises 57 gravity stations, including 6 absolute gravity stations, was measured with LaCoste & Romberg gravimeter model G （LCR-G）. Precise relative connections were also made between CGBN85 and several existing international standards. A whole adjustment was made by applying the parameter adjustment method, taking scale functions for each LCR-G meter into account. The nationwide new CGBN85 with an average internal accuracy ±8μGal [10-8ms-2] was then established and has been used, since its official appraisal, in gravimetric practices for two years. This shows that CGBN85 meets the requirements of modern earth sciences.

关键词： CGBN85 scale function of gravimeter absolute gravity measurement IGSN71.

A　SUPERLINEARLY　CONVERGENT　GENERALIZED　GRADIENT　PROJECTION　ALGORITHMFOR　LINEARLY　CONSTRAINED　PROBLEMS

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Systems Science and Mathematical Sciences 1995年第4期8卷 299-310页

作者： HE Guoping GAO Ziyou(Institute of Applied Mathematics,Academia Sinica,beijing 100080,china)ZHU Jianqing (Zhengzhou Institute of surveying and {3.,Zhengzhou 450052,china) 中科院应用数学所北京解放军郑州测绘学院河南郑州 450052

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关键词： Generalized gradient projection method linearly constrained problem superlinear convergence pivoting operation.

Improved threshold retracker for satellite altimeter waveform retracking over coastal sea

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Progress in Natural Science:Materials International 2006年第7期16卷 732-738页

作者： GUO Jinyun, HWANG Cheiway, CHANG Xiaotao and LIU Yuting ( Department of Land Information and surveying Engineering, Xuzhou Normal University, Xuzhou 221116, china Departmenl of Civil Engineering, National Chiao Tung University, Hsinchu 3.050, Taiwan, china Institute of Geodesy, china Academy of surveying and mapping, beijing 10003., china) [a]Department of Land information and surveying Engineering Xuzhou Normal University Xuzhou China [b]Department of Civil Engineering National Chiao Tung University Taiwan China [c]Institute of Geodesy China Academy of Surveying and Mapping Beijing China

Data quality is a key factor for the application of satellite altimetry to geodesy and oceanography. Accuracy of altimetry is limited in the coastal area because the altimeter waveforms are seriously contaminated by topography and environmental pollution. So waveform retracking is needed to compute the range correction of geophysical data records (GDRs) for better accuracy. In this paper, a new waveform retracker named the improved threshold retracker (ITR) is put forward. The retracker first builds sub-waveforms based on leading edges detected in a waveform, then determines the middle point of each leading edge to compute the retracking range correction, finally calculates the referenced sea surface heights according to the geoid undulation from a local geopotential model and tide heights from an ocean tide model, and compares it with all retracking ranges to determine the best one. As a test, altimeter waveforms of Geosat/GM are retracked around the Taiwan coastal area. The result shows that accuracy of ITR method is two times better than that of theβ-5-pa-rameter function-fitting method and threshold method, and three times better than that of GDRs. ITR can efficiently improve the altimetry accuracy of the coastal sea area.

关键词： satellite altimetry waveform retracking improved threshold retracker sub-waveform.

Image City sharing platform and its typical applications

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Science china(Information Sciences) 2011年第8期54卷 1738-1746页

作者： SHAO ZhenFeng & Li DeRen State Key Laboratory for Information Engineering in surveying,mapping and Remote Sensing,Wuhan University,Wuhan 43.079,china 1. State Key Laboratory for Information Engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China

In this paper,the trend of urban spatial information sharing service from the electronic map to image is analyzed and its sharing framework based on service-oriented architecture is ***,the service implementation,feedback data service procedure and its processing service model are explored. Based on the software with independent intellectual property rights,image city of Taizhou is developed as an example to realize various image data and processing servicesLastly,the bright future prospects of image city are described.

关键词： Image City service-oriented architecture image data service function service model service

Subsidence control and farmland conservation by solid backfilling mining technology

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中国有色金属学会会刊：英文版 2011年第S3期21卷 665-669页

作者： GUO Guang-li1, 2, FENG Wen-kai3. ZHA Jian-feng1, 2, 3. LIU Yuan-xu1, 2, WANG Qiang1, 2 1. Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of surveying and mapping, china University of Mining and Technology, Xuzhou 221116, china 2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, china University of Mining and Technology, Xuzhou 221116, china 3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, china [a] Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of surveying and mapping China University of Mining and Technology Xuzhou 221116 China [b] Jiangsu Key Laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China [c] State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining technology, which decreases the height of fissure zone and caving zone, and alleviates the subsidence, is a new technology for farmland conservation. Based on the situation analysis of farmland destruction in mining area, three ways for farmland protection were proposed. In order to improve the feasibility of this technology, the limited filling materials should be used to increase resources recovery ratio, and then the surplus materials could be backfilled into goaf. An index, namely farmland conservation ability, was put forward to optimize the ways for farmland conservation. At last, the Wanbei coal mine was taken as a case for farmland conservation. It was shown that 3.40 t dull coal was substituted and 52 hm2 farmland was conserved by solid backfilling mining in this coal mine.

关键词： solid backfilling farmland conservation mining subsidence equivalent mining height

Mining subsidence control by solid backfilling under buildings

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中国有色金属学会会刊：英文版 2011年第S3期21卷 670-674页

作者： ZHA Jian-feng1, 2, 3. GUO Guang-li1, 2, FENG Wen-kai3. WANG Qiang1, 2 1. Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of surveying and mapping, china University of Mining and Technology, Xuzhou 221116, china 2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, china University of Mining and Technology, Xuzhou 221116, china 3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, china [a] Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of surveying and mapping China University of Mining and Technology Xuzhou 221116 China [b] Jiangsu Key Laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China [c] State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining can reduce the buildings' damage caused by mining greatly. The reduction of subsidence value, the slow advancing speed and the subsidence caused by backfilling body compaction are the main reasons that solid backfilling mining velocity decreases significantly. Based on the research of mechanism, some principles on subsidence control of solid backfilling mining under buildings were proposed. The equivalent mining height was designed according to the fortification criteria of buildings and their attachment structures, which enables the ground movement and deformation caused by mining to be less than the corresponding fortification criteria.

关键词： solid backfilling mining subsidence control mining under buildings