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Digital close-range photogrammetric application to small-scale physical simulation experiment

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中国有色金属学会会刊：英文版 2011年第S3期21卷 681-685页

作者： li Chun-yi1, CUI Xi-min2. YU Yi-ju3.1. School of surveying and Landing Information Engineering, Henan Polytechnic {2., Jiaozuo 454003. china 2. college of Geoscience and surveying Engineering, china {2. of mining and technology, beijing 100083. china 3. surveying and Mapping Press, {12. 100045, china [a] School of surveying and Landing Information Engineering Henan Polytechnic University Jiaozuo 454003 China [b] college of Geoscience and surveying Engineering China University of Mining and Technology Beijing 100083 China [c] surveying and Mapping Press Beijing 100045 China

In order to research the possibility of digital close-range photogrammetric surveying in small scale physical simulation experiment, physical model coinciding with engineering practice was constructed based on similar theory. The datum processing method and surveying precision of digital close-range photogrammetric were analyzed. And the function relationship between overburden subsidence factor qr and the ratio z/H of stratum horizon z and {3. depth H was researched. The results show that surveying points position mean error along horizontal direction is ±0.13. mm and vertical direction is ±0.192.mm. Therefore, multi-taking station cross direction digital close-range photogrammetric can completely satisfy the precision need of physical simulation experiment. And the empirical formula can be utilized to represent evolution law of stratum subsidence factor.

关键词： close-range photogrammetric physical simulation light-rays adjustment surveying precision subsidence factor

Numerical simulation of surface movement laws under different unconsolidated layers thickness

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中国有色金属学会会刊：英文版 2011年第S3期21卷 599-603页

作者： dai hua-yang1, li Wen-chang2. liU Yi-xin1,3. JIANG Yao-dong3.1. college of geosicence and surveying Engineering, china university of mining and technology, beijing 100083. china 2. college of Resources and Safety Engineering, china university of mining and technology, beijing 100083. china 3. college of Mechanics and Civil Engineering, china university of mining and technology, beijing 100083. china [a] college of geosicence and {2. Engineering China University of Mining and Technology Beijing 100083 China [b] college of Resources and Safety Engineering China University of Mining and Technology Beijing 100083 China [c] college of Mechanics and Civil Engineering China University of Mining and Technology Beijing 100083 China

Based on specific geology and mining conditions of certain coal working face in china, a series of numerical models under diffe{2.t unconso{3.dated layers thickness were respectively estab{3.shed by employing FLAC3.. The relationship between the unconso{3.dated layers thickness and surface movement laws was studied. Maximum surface subsidence, Maximum horizontal displacement and surface subsidence degree were obtained. Contours of surface subsidence/horizontal displacement and curves were drawn. Some laws of surface subsidence/horizontal displacement were analyzed. The role of the unconso{3.dated layers in surface subsidence was revealed. It is significant to predict surface subsidence of thick unconso{3.dated layers for coal mine and take effective measures to control surface subsidence.

关键词： unconsolidated layers surface movement numerical simulation deep mining FLAC3.

Reconciled estimation of Antarctic ice sheet mass balance and contribution to global sea level change from 1996 to 2.2.

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Science china Earth Sciences 2024年第11期67卷 3562-3578页

作者： Rongxing li Guojun li Gang {2. {3.n XIE Yuan CHENG Wei CHEN Xiangbin CUI Minghu DING Chunchun GAO Tong HAO Changqing KE C{3.njin li Jin li yan liU Jiangjun RAN Jiawen ren Qiang SHEN Yunzhong SHEN Hongling SHI Songyun wang Zemin wang Jingang ZHAN Baojun ZHANG Min ZHONG Chunxia ZHOU Center for Spatial Information Science and Sustainable Development Applications Tongji University college of surveying and Geo-informatics Tongji University Institute for the Conservation of Cultural Heritage School of Cultural Heritage and Information Management Shanghai University college of Resource Environment and Tourism Hubei University of Arts and Science Polar Research Institute of china State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences college of Geodesy and Geomatics Shandong University of Science and Technology School of Geography and Ocean Science Nanjing University Shanghai Astronomical Observatory Chinese Academy of Sciences State Key Laboratory of Remote Sensing Science Faculty of Geographical Science Beijing Normal University Department of Earth and Space Sciences Southern University of Science and Technology State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of Sciences Center for Space Research University of Texas at Austin Chinese Antarctic Center of surveying and Mapping Wuhan University School of Geospatial Engineering and Science Sun Yat-sen University

The Antarctic Ice Sheet（AIS） has been losing ice mass and contributing to global sea level rise（GSLR）. Given its mass that is enough to cause ～58 m of GSLR, accurate estimation of mass balance trend is critical for AIS mass loss monitoring and sea level rise forecasting. Here, we present an improved approach to reconciled solutions of mass balance in AIS and its regions from multiple contributing solutions using the input-out, altimetric, and gravimetric methods. In comparison to previous methods, such as IMBIE 2.18, this approach utilizes an adaptive data aggregation window to handle the heterogeneity of the contributing solutions, including the number of solutions, temporal distributions, uncertainties, and estimation techniques. We improved the regression-based method by using a two-step procedure that establishes ensembled solutions within each method（input-output, altimetry, or gravimetry） and then estimates the method-independent reconciled solutions. For the first time, 16contributing solutions from 8 Chinese institutions are used to estimate the reconciled mass balance of AIS and its regions from1996 to 2.2.. Our results show that AIS has lost a total ice mass of ～3.1}3.2.3.Gt during the period, an equivalent of～8.9±0.7 mm of GSLR. There is a sustained mass loss acceleration since 2.06, from 88.1±3.6 Gt yr-1during 1996–2.05 to 13..7 ±8.4 Gt yr-1during 2.06–2.13.and further to 157.0±9.0 Gt yr-1during 2.14–2.2.. The mass loss signal in the West Antarctica and Antarctic Peninsula is dominant and clearly presented in the reconciled estimation and contributing solutions, regardless of estimation methods used and fluctuation of surface mass balance. Uncertainty and challenges remain in mass balance estimation in East Antarctica. This reconciled estimation approach can be extended and applied for improved mass balance estimation in the Greenland Ice Sheet and mountain glacier regions.

关键词： Antarctic Ice Sheet Ice mass loss acceleration Sea level rise Reconciled estimation

Spatiotemporal model of open-pit based on 3.D deposit model

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中国有色金属学会会刊：英文版 2011年第S3期21卷 616-620页

作者： XIA Chun-lin1, ZHOU Hui1, li Qing-yuan2. MA Zhen-li3.1. School of Geomatics, liaoning Technical university, Fuxin 12.000, china 2. State Key Laboratory for GIS Engineering, Chinese Academy of surveying and Mapping, beijing 10083., china 3. Yinchuan {13., china university of mining and technology, Yinchuan 750011, china [a] School of Geomatics Liaoning Technical University Fuxin 123000 China [b] State Key Laboratory for GIS Engineering Chinese Academy of Surveying and Mapping Beijing 100830 China [c] Yinchuan college China University of Mining and Technology Yinchuan 750011 China

A new method was put forward to make up the three-dimensional deposit model, and the spatiotemporal models of open-pit with temporal dynamics were also studied combined with the corrected models of multilevel ground states so as to bring the three-dimensional open-pit model at different time and its model serial formed from the evolvement into the management of temporal dimension in order to realize the spatial three-dimension and temporal dynamic for the {2. management in open-pits,which makes this model easy to query and analyze 3.D information, also help surface {2. replaying and stope evolution forecasting. Finally, the time-spatial model was established to show the dynamic {2. on some open-pit under the windows XP and VC++ environment.

关键词： 3. model of deposit three-dimensional model mixed model temporal model open-pit

Remote sensing and its applications using GNSS reflected signals:advances and prospects

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Satellite Navigation 2024年第1期5卷 10-51页

作者： Shuanggen Jin Adriano Camps yan Jia Feng {2. Manuel Martin-Neira Feixiong huang Qingyun yan Shuangcheng Zhang Zhongyu li Komi Edokossi Dongkai yang Zhiyu Xiao Zhongmin Ma Weihua Bai Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai200030China School of surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuo454003China Department of Signal Theory and Communications Technical University of CataloniaBarcelona08034Spain Department of surveying and Geoinformatics Nanjing University of Posts and TelecommunicationsNanjing210023China School of Electronics and Information Engineering Beihang UniversityBeijing100191China European Space Research and technology Centre(ESTEC) European Space Agency2200-AGNoordwijkThe Netherlands National Space Science Center Chinese Academy of SciencesBeijing100190China School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science and TechnologyNanjing210044China college of Geological Engineering and Geomatics Chang’an UniversityXi’an710054China university of Electronic Science and technology of {2. Chengdu611731China

The Global Navigation Satellite Systems(GNSS),including the US’s GPS,china’s BDS,the European Union’s Galileo,and Russia’s GLONASS,offer real-time,all-weather,any-time,anywhere and high precision observations by transmitting L band signals continuously,which have been widely used for positioning,navigation and *** the development of GNSS {3.,it has been found that GNSS-reflected signals can be used to detect Earth’s surface characteristics together with other signals of *** this paper,the current status and latest advances are presented on Global Navigation Satellite System-Reflectometry(GNSS-R)in theory,methods,techniques and *** developments and progresses in GNSS-R instruments,theoretical modeling,and signal processing,ground and space-/air-borne experiments,parameters retrieval(*** speed,sea surface height,soil moisture,ice thickness),sea surface altimetry and applications in the atmosphere,oceans,land,vegetation,and cryosphere are given and reviewed in ***,the challenges in the GNSS-R development of each field are also ***,the future applications and prospects of GNSS-R are discussed,including multi-GNSS reflectometry,new GNSS-R receivers,GNSS-R missions,and emerging applications,such as mesoscale ocean eddies,ocean phytoplankton blooms,microplastics detection,target recognition,river flow,desert studies,natural hazards and landslides monitoring.

关键词： GNSS Reflectometry Remote sensing Environmental change

Calculation of maximum ground movement and deformation caused by mining

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中国有色金属学会会刊：英文版 2011年第S3期21卷 562-569页

作者： li Pei-xian1, 2. TAN Zhi-xiang1, 2. DENG Ka-zhong1, 2.1. Key Laboratory for Land Environment and Disaster Monitoring of State Bureau of surveying and Mapping, {2. university of mining and technology, Xuzhou 2.1116, {2. 2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, {2. university of mining and technology, Xuzhou 2.1116, {2. [a] Key Laboratory for Land Environment and Disaster Monitoring of 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

In order to know the maximum mining ground deformation of arbitrary surface point, directions of the maximum surface tilt, curvature,horizontal displacement and horizontal deformation caused by multi-working faces were deduced based on probability integral method. The distribution forms of surface deformations in all direction φ∈[0, 2.] were obtained and also equations of maximum deformations were given based on calculation of mining ground deformation in direction φ. A mining subsidence analysis system was developed with VB6.0. The system implements the probability integral mining subsidence prediction with direct integration method, and it can avoid errors of arbitrary shaped working face subdivision of traditional method, and accuracy of mining subsidence prediction can be improved with the direct integral method. The system implements the contour chart and profile chart and also data analysis automation by manipulation of the SURFER kernel function and it complements the defect of existing subsidence prediction software. Calculation of maximum deformations caused by multi-working faces mining in a coal mine of Xuzhou, china was shown as application example. Engineering application indicates that maximum deformation of mining ground surface can be calculated and analyzed by the system. The research provides a theoretical basis and calculation tool for mining subsidence prediction and analysis.

关键词： mining subsidence probability integral method movement and deformation system development

Assessment of the three representative empirical models for zenith tropospheric delay(ZTD)using the CMONOC data

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Geodesy and Geodynamics 2024年第5期15卷 488-494页

作者： Debao Yuan Jian li Yifan Yao Fei yang Yingying {2. Ran Chen Tairan Xu college of Geoscience and surveying Engineering China University of Mining and Technology-BeijingBeijing100083China Hubei Luojia Laboratory Wuhan430079China

The precise correction of atmospheric zenith tropospheric delay(ZTD)is significant for the Global Navigation Satellite System(GNSS)performance regarding positioning accuracy and convergence *** the past decades,many empirical ZTD models based on whether the gridded or scattered ZTD products have been proposed and widely used in the GNSS positioning *** there is no comprehensive evaluation of these models for the whole china region,which features complicated topography and *** this study,we completely assess the typical empirical models,the IGGtropSH model(gridded,non-meteorology),the SHAtropE model(scattered,non-meteorology),and the GPT3.model(gridded,meteorology)using the Crustal Movement Observation Network of china(CMONOC)*** general,the results show that the three models share consistent performance with RMSE/bias of 3..45/1.63.3..13.2.2.,and 3..2./1.3. mm for the GPT3.SHAtropE and IGGtropSH model,***,the models had a distinct performance regarding geographical distribution,elevation,seasonal variations,and daily *** the southeastern region of china,RMSE values are around 50 mm,which are much higher than that in the western region,approximately 2. *** SHAtropE model exhibits better performance for areas with large variations in *** GPT3.model and the IGGtropSH model are more stable across different months,and the SHAtropE model based on the GNSS data exhibits superior performance across various UTC epochs.

关键词： GNSS Zenith tropospheric delay Empirical ZTD model CMONOC data

Response of ecosystem carbon storage to land use change from 1985 to 2.50 in the Ningxia Section of Yellow River Basin,china

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Journal of Arid Land 2024年第1期16卷 110-130页

作者： liN yanmin HU Zhirui li Wenhui CHEN Haonan {3. Fang NAN Xiongxiong yang xuelong ZHANG Wenjun college of Geographical Sciences and Planning Ningxia UniversityYinchuan 750021China china-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Region Yinchuan 750021China Ningxia Land Resources surveying and Monitoring Institute Yinchuan 750002China State Key Laboratory of Efficient Production of Forest Resources Yinchuan 750002China Ningxia lingwu Baijitan National Nature Reserve Administration Yinchuan 751400China

Regional sustainable development necessitates a holistic understanding of spatiotemporal variations in ecosystem carbon storage(ECS),particularly in ecologically sensitive areas with arid and semi-arid *** this study,we calculated the ECS in the Ningxia Section of Yellow River Basin,china from 1985 to 2.2. using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model based on land use *** further predicted the spatial distribution of ECS in 2.50 under four land use scenarios:natural development scenario(NDS),ecological protection scenario(EPS),cultivated land protection scenario(CPS),and urban development scenario(UDS)using the patch-generating land use simulation(PLUS)model,and quantified the influences of natural and human factors on the spatial diffe{2.tiation of ECS using the geographical detector(Geodetector).Results showed that the total ECS of the study area initially increased from 1985 until reaching a peak at 402.3.×10^(6) t in 2.10,followed by a decreasing t{2.d to *** spatial distribution of ECS was characterized by high values in the eastern and southern parts of the study area,and low values in the western and northern *** 1985 and 2.2.,land use changes occurred mainly through the expansion of cultivated land,woodland,and construction land at the expense of unused *** total ECS in 2.50 under diffe{2.t land use scenarios(ranked as EPS>CPS>NDS>UDS)would be lower than that in *** light was the largest contributor to the spatial diffe{2.tiation of ECS,with soil type and annual mean temperature being the major natural driving *** of this study could provide guidance on the ecological construction and high-quality development in arid and semi-arid areas.

关键词： carbon storage land use change nighttime light Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model patch-generating land use simulation(PLUS)model geographical detector(Geodetector) Yellow River Basin

Vision navigation algorithm for mine agent based on quaternion

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中国有色金属学会会刊：英文版 2011年第S3期21卷 610-615页

作者： li Ke-zhao1, 4, LEI Wei-wei1, 2. GUO Zeng-zhang1, 2. WU li-xin3. ZHANG Qin4 1. School of Survey and Land Information Engineering, Henan Polytechnic {2., Jiaozuo 454003. china 2. Key Laboratory of Mine Spatial Information Technologies of State Bureau of surveying and Mapping, Henan Polytechnic {2., Jiaozuo 454003. china 3. college of Resources and Civil Engineering, Northeastern {2., Shenyang 110819, china 4. college of Geology Engineering and Geomatics, Chang’an {2., Xi’an 710054, china [a] School of Survey and Land Information Engineering Henan Polytechnic University Jiaozuo 454003 China [b] Key Laboratory of Mine Spatial Information Technologies of State Bureau of surveying and Mapping Henan Polytechnic University Jiaozuo 454003 China [c] college of Resources and Civil Engineering Northeastern University Shenyang 110819 China [d] college of Geology Engineering and Geomatics Chang'an University Xi'an 710054 China

Autonomous relative navigation is the key technology in mining or rescuing. On the basis of mine requirement and the theories of machine vision, an autonomous relative navigation algorithm for mine agent based on quaternion was proposed. In rotation transformation, this algorithm was represented by using quaternion. Because the Jacobi matrix of this method is lower than that of Hall algorithm, the calculation efficiency is improved by using this algorithm. The results of these experiments show that the computation burden of this algorithm based on quaternion is about half that of Hall algorithm. This algorithm based on quaternion is improved as a va{2.d way to solve the problem of mine real-time navigation.

关键词： quaternion mine agent vision navigation