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西藏灌木林遥感分类方法对比研究

山地学报 2010年第5期28卷 572-578页

作者：张超黄清麟朱雪林张晓红普布顿珠旦增西南林业大学资源学院中国林业科学研究院资源信息研究所国家林业局林业遥感与信息技术重点实验室西藏自治区林业调查规划研究院

以西藏主要类型灌木林为对象,开展外业遥感调查,分别应用非监督分类、监督分类、基于空间分布特征的辅助分类和基于光谱特征再分类4.方法,对灌木林类型进行了遥感分类识别,并对各种分类方法所得到的分类结果进行对比评价。研究表明,非... 详细信息

以西藏主要类型灌木林为对象,开展外业遥感调查,分别应用非监督分类、监督分类、基于空间分布特征的辅助分类和基于光谱特征再分类4.方法,对灌木林类型进行了遥感分类识别,并对各种分类方法所得到的分类结果进行对比评价。研究表明,非监督分类和监督分类的总体精度分别为4..20%和4..79%,除了对沙棘灌木林分类精度较高外,对其他灌木林类型分类精度均较低;基于空间分布特征的辅助分类精度为86.24.,其分类结果未能识别到具体灌木林类型;基于光谱特征的再分类精度为70.64.,对沙棘、红柳能较准确的识别,而对个别灌木林类型(如杜鹃和小檗)的识别精度不高。

关键词：西藏灌木林遥感分类空间分布特征光谱特征

4. and application of land reclamation in mining area

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中国有色金属学会会刊：英文版 2005年第S1期15卷 49-52页

作者： XIE Hong-quan~(1,2 ), HU Zhen-qi~1, JING Hai-tao~3, GAO Yong-jiu~(4., CHEN Qiu-ji~(5), FENG Zhong-ke~(6) (1. china University of Mining and technology(beijing Campus), beijing 100083, china 2. Hebei Polytechnic University, Tangshan 063009, china 3. Xuzhou Normal University, Xuzhou 221009, china 4. Tangshan Branch, china Coal research institute, Tangshan 063012, china 5. Henan Polytechnic University, Jiaozuo 4.4.00, china 6. beijing forestry University, beijing 100083, china) china Univ Min & Technol Beijing 100083 Peoples R China Hebei Polytech Univ Tangshan 063009 Peoples R China Xuzhou Normal Univ Xuzhou 221009 Peoples R China china COal Res Inst Tangshan Branch Tangshan 063012 Peoples R China Henen Polytech Univ Jiaozuo 454000 Peoples R China beijing forestry Univ Beijing 100083 Peoples R China

4. products are basic mode of digitized products that are made by combining model remote sensing with GIS technology, and have already brought everybody’s high recognition. Coal mining makes great destroy to land of coal mining area, and ecological environment becomes worse, therefore land reclamation of mining area has already turned into investigated emphases. 4. meaning is briefly introduced, and its six characteristics are expounded in this paper. Production technique and application status of 4. are summarized, and existed problems are analyzed in developed aspect. Land reclamation of mining area is a complex system engineering, and application of 4. products can be impenetrated in whole process. Otherwise 4. has broad application scope in land management of mining area and mine information construction. Compound of remote sensing and DTM can be apply to solve mine survey, monitor of surface and marginal slope and so on.

关键词： 4. produce land reclamation remote sensing image data resource

Atmospheric frontal gravity waves observed in satellite SAR images of the Bohai Sea and Huanghai Sea

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Acta Oceanologica Sinica 2010年第5期29卷 35-43页

作者： LIU Shuming LI Ziwei YANG Xiaofeng Pichel William G YU Yang ZHENG Quanan LI Xiaofeng The First institute of Oceanography State Oceanic Administration Qingdao 266061 China National Marine Data and information Service Tianjin 300171 China institute of remote sensing Applications chinese {4. of Science Beijing 100101 China NOAA/NESDIS Center for Satellite Applications and Research Camp Springs MD 20746-4304 USA Department of Atmospheric and Oceanic Science University of Maryland Maryland 20742-2425 USA IMSG at NOAA/NESDIS NOAA E/RA3 WWBG Room 102 5200 Auth Road Camp Springs MD 20746-4304 USA.

In the satellite synthetic aperture radar（SAR） images of the Bohai Sea and Huanghai Sea,the authors observe sea surface imprints of wave-like patterns with an average wavelength of 3.8 *** SAR observations with sea surface wind fields and surface weather maps,the authors find that the occurrence of the wave-like phenomena is associated with the passing of atmospheric *** authors define the waves as atmospheric frontal gravity *** dynamical parameters of the wave packets are derived from statistics of 9 satellite SAR images obtained from 2002 to 2008.A two-dimensional linear physical wave model is used to analyze the generation mechanism of the *** atmospheric frontal wave induced wind variation across the frontal wave packet is compared with wind retrievals from the SAR *** CMOD-5（C-band scatterometer ocean geophysical model function） is used for SAR wind retrievals VV（transmitted vertical and received vertical） for ENVISAT and HH（transmitted horizontally and received horizontally） for RADARSAT-1.A reasonable agreement between the analytical solution and the SAR observation is *** new SAR frontal wave observation adds to the school of SAR observations of sea surface imprints of AGWs including island lee waves,coastal lee waves,and upstream Atmospheric Gravity Waves（AGW）.

关键词： Atmospheric gravity waves atmospheric front generation mechanism synthetic aperture radar

An integrated approach to scaling issues in environmental change study

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Journal of Geographical Sciences 2000年第4期10卷 45-52页

作者： LIU Hong-hui, YANG Xiao-huan, WANG Nai-bin, LIU Hai-yan (Center for resources and Environmental Data, institute of Geographic Sciences and Natural resources research, {4. academy of Sciences, beijing 100101, china)

Global change research and sustainable development need to be addressed at larger scales in the light of small scale process studies. Much remains to be done before the small scale, process level understanding of ecosystem responses to global change can be reliably translated to larger scales. The paper reviews the status of scaling issues and tries to find how to extrapolate our observations and our findings at site scale up to regional scale and provide ecological information and interpretations at the regional scale. An integrated approach to scaling-up from site to region is proposed combining hierarchical theory, landscape ecology, remote sensing, geographical information system (GIS) with process/mechanistic modeling. remote sensing and GIS will play key roles in spatial analysis, integration as well as cross scale modeling.

关键词： scale issue global change study scaling up integrated approach

Retrieval of the aerosol particle size distribution function by incorporating a priori information

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Retrieval of the aerosol particle size distribution function...

中国科学院地质与地球物理研究所2007学术年会

作者： Yanfei Wang~(a,b,*),Shufang Fan~c,Xue Feng~d a institute of Geology and Geophysics,chinese academy of Sciences,P.O.Box 9825,beijing 100029,PR{4. b State Key laboratory of remote sensing Science,Jointly Sponsored by the institute of remote sensing Applications of chinese academy of Sciences and beijing Normal University,beijing 100101,PR{4. c Department of Mathematics,Liaocheng University,Shandong 252059,PR{4. d School of Geography,beijing Normal University,beijing 100875,PR{4.

The determination of the aerosol particle size distribution function using the particle spectrum extinction equation is an ill-posed integral equation of the first *** overcome the ill-posedness,regularization techniques such as Phillips-Twomey ’s regulanzation, Tikhonov’s smooth regularization as well as some iterative methods were ***,most of the literature focuses on improving the solvability of the problem without introducing some useful a priori information,which are essential to ill-posed inverse problems,since it is known that,we are often faced with limited/insufficient observations in remote ***,we restudy this *** first formulate the problem in l space and solve a nonnegative constrained problem to obtain a useful a priori solution,then we use this solution to reformulate the problem in l space and solve a regularized *** results are based on the remotely sensed data by Sun-photometer CE 318 for Poyang lake region of Jiangxi Province and are performed to show the efficiency and feasibility of the proposed algorithms.

关键词： Aerosol particle size distribution Inversion Regularization A priori l~1 and l~2 norm Damped Gauss-Newton iteration

Duststorms and the Related Disasters

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Duststorms and the Related Disasters

第三届中日韩气象学术会议

作者： ZENG Qing-Cun~1 DONG Chao-Hua~2 PENG Gong-Bing~3 ZHAO Si-Xiong~1 FANG Zong-Yi~2 JIAO Mei-Yan~4.institute of Atmospheric Physics chinese academy of Sciences beijing 100029 {4. National Satellite Meteorological Center {4. Meteorological Administration beijing 100081 {4. institute of Geographic Sciences and resource research chinese academy of Sciences beijing 100101 {4. National Meteorological Center {4. Meteorological Administration beijing 100081 {4.

＜正＞This is a report describing briefly the“Duststorm monitoring,Predicting and Warming system”.This system was developed by the scientists of china Meteorological Administration,chinese academy of Sciences and some universities and applied as a subroutine in the National Satellite Meteorological Center and the National Meteorological Center since 2002,and became an operational one in the daily routine service since *** system consists of the following components: the satellite remote {4. and the ground based observational network,the short- range numerical dust-weather prediction,extra-annual and extraseasonal prediction of anomalies of spring atmospheric circulation and soil moisture,renewable GIS （Geographic information System）and the information and evaluation of related disasters.

关键词： duststorm monitoring predicting warning disaster evaluation climate prediction

STUDY ON WETLAND resourceS IN DELTASAROUND BOHAI SEA

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chinese Geographical Science 2000年第2期10卷 151-158页

作者： LIU Zhen-qian LIU Hong-yu LU Xian-guo(Changchun institute of Geography the chinese academy of Scicnces, Changchan 130021, P.R. china) Changchun institute of Geography the Chinese Academy of Sciences Changchun P. R. China

Based on the data of wetlands in Huanghe delta and Liaohe delta which were go by the combination of remote sensing(RS), Geographical information System(GIS) and Global Position System(GPS), the paper discusses the sindlarities and differences of wetlands in the two regions by comparing them in composition, distribuhon, spatial pattern of landscape and ecology. Problems in using and conserving weiland resources are shown in the paper, which aimto provide basis for the further study on the landscape ecology, function, and sustainable use of weilands in the deltas. The study shows that the wedands in the two deltas are characterized by peat variety of weiland types, distribution with the shape of strip, abundant resources of wild plants and animals, intense effects of human activities on the structure of the landscapes, broad prospects for development and great environmental pressure. It is necessary to successfull solve the contradiction between development and protection. At present, the most pressing matter of the moment is to protect environment and control pollution.

关键词： Huanghe delta Liaohe delta wetlands resource classification system

Ceometric calibration of high-resolution remote sensing sensors

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Ceometric calibration of high-resolution remote sensing sens...

5th Asian Symposium on Geographic information System from Computer Science & Engineering View

作者： LIANG Hong-you~(1,2,3) GU Xing-fa~1 TAO Yu~1 QIAO Chao-fei~4.(1.Graduate University of chinese academy of Sciences,beijing 100039,P.R.china 2.State Key {4.oratory of remote sensing Science,institute of remote sensing Applications,CAS,beijing 100101,P.R.china 3.Henan Polytechnic University,Jiaozuo 4.4.03,P.R.china 4.Development and research Center for Surveying and Mapping State Bureau of Surveying and Mapping,beijing 10004.,P.R.china)

＜正＞This paper introduces the applications of high-resolution remote sensing imagery and the necessity of geometric calibration for remote sensing sensors considering assurance of the geometric accuracy of remote sensing *** the paper analyzes the general methodology of geometric *** the DMC sensor geometric calibration as an exam- ple,the paper discusses the whole calibration ***,it gave some concluding remarks on geometric calibration of high-resolution remote sensing sensors.

关键词： digital camera geometric calibration geometric correction remote sensing

An efficient gradient method for maximum entropy regularizing retrieval of atmospheric aerosol particle size distribution function

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An efficient gradient method for maximum entropy regularizin...

中国科学院地质与地球物理研究所2008学术年会

作者： Yanfei Wang~* Division of Oil and Gas resource,institute of Geology and Geophysics,chinese academy of Sciences,P.O.Box 9825,{4. 100029,PR china

The aerosol particle size distribution function can be retrieved by solving the moment *** is an ill-posed problem,since it is known that,we are often faced with limited/insufficient observations in remote sensing and the observations are *** overcome the ill-posed nature,regularization techniques such as Phillips-Twomey ’s regularization,Tikhonov’s smooth regularization as well as some iterative methods were *** the particle size distribution function is always nonnegative,and we are often faced with incomplete data,the concept of maximum entropy from information theory and statistic mechanics can be used for this ***,in this paper,we study the maximum entropy-based regularization method and develop a nonmonotone gradient method for solving the corresponding optimization *** numerical tests for both synthetic problem and practical problem are given to show the efficiency and feasibility of the proposed algorithm.

关键词： Aerosol particle size distribution Moment problem Inversion Maximum entropy regularization Gradient method