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Visible and near infrared reflectance spectroscopy for measuring soil heavy metal content as a quick method

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Acta Geochimica 2006年第S1期 225-226页

作者： Yunzhao WU1, Jun CHEN2. Junfeng JI2. Peng GONG1, Qilin LIAO3, Hongrui MA2.1 state {4. Lab of {2. sensing Science, institute of remote sensing applications, Chinese academy of sciences, beijing 100101, china 2.Department of Earth Science, Nanjing University, Nanjing 2.0093, china 3 Geological Survey of Jiangsu Province, Nanjing 2.0093, china

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应用遥感技术评估土壤侵蚀影响因素

水土保持研究 2007年第5期14卷 330-333页

作者：王莉雯牛铮卫亚星中国科学院遥感应用研究所遥感科学国家重点实验室北京100101 辽宁师范大学城市与环境学院辽宁大连116029

在全世界范围内土壤侵蚀对农业生产、地基和水质量都具有负面影响。因此,进行土壤侵蚀评价是非常重要的,但其往往受到数据可用性和数据质量的限制。利用遥感技术有助于土壤侵蚀的评价,它可以为土壤侵蚀评价提供所需的空间数据。在过去... 详细信息

在全世界范围内土壤侵蚀对农业生产、地基和水质量都具有负面影响。因此,进行土壤侵蚀评价是非常重要的,但其往往受到数据可用性和数据质量的限制。利用遥感技术有助于土壤侵蚀的评价,它可以为土壤侵蚀评价提供所需的空间数据。在过去的30年许多研究在这方面做了不同深度层次的工作。本论文主要回顾了利用遥感技术评估土壤侵蚀影响因素的方法。土壤侵蚀影响因素的评估包括：地貌、土壤特性、植被覆盖和管理措施。

关键词：土壤侵蚀遥感影响因素

Experimental results and analysis of sparse microwave imaging from spaceborne radar raw data

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Science china(Information sciences) 2012年第8期55卷 1801-1815页

作者： JIANG ChengLong1,2.3,ZHANG BingChen1,2.ZHANG Zhe1,2.3,HONG Wen1,2.WU YiRong1,2.1S cience and Technology on Microwave Imaging laboratory,beijing 100190,{2. 2. nstitute of Electronics,Chinese academy of sciences,beijing 100190,{2. 3G raduate University of Chinese academy of sciences,beijing 100190,{2. 1. Science and Technology on Microwave Imaging laboratory Beijing 100190 China2. Institute of Electronics Chinese Academy of Sciences Beijing 100190 China3. Graduate University of Chinese Academy of Sciences Beijing 100190 China

Sparse microwave imaging is a novel radar framework aiming to bring revolutions to the microwave imaging according to the theory of sparse signal *** compressive sensing(CS)is introduced to synthetic aperture radar(SAR)imaging in recent years,the current SAR sparse imaging methods have shown their advantages over the traditional matched filtering ***,the requirement for these methods to process the compressed range data results in the increase of the hardware *** the SAR sparse imaging method that directly uses the raw data is *** paper describes the method of SAR sparse imaging with raw data directly,presents the analysis of the signal-to-noise ratio(SNR)in the echo signal by combining the traditional radar equation with the compressive sensing theory,and provides the tests on 2.D simulated SAR *** simulation results demonstrate the validity of the SNR analysis,and the good performance of the proposed method while a large percentage of the raw data is *** experiment with RadarSat-1 raw data is also carried out to show the feasibility of processing the real SAR data via the method proposed in this *** method is helpful for designing new SAR systems.

关键词： sparse microwave imaging synthetic aperture radar(SAR)imaging compressive sensing signalto-noise ratio raw data

Atmospheric correction of HJ-1A/B CCD images over Chinese coastal waters using MODIS-Terra aerosol data

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Science china(Technological sciences) 2010年第S1期53卷 191-195页

作者： TIAN LiQiao 1,LU JianZhong 1,CHEN XiaoLing 1,2.3,YU ZhiFeng 1,XIAO JingJing 1,QIU Feng 1 & ZHAO Xi 1 1 state key {2. of Information Engineering in Surveying,Mapping and {4. sensing,Wuhan University,Wuhan 4.0079,china 2.1} {2. of Poyang Lake Wetland and Watershed Research,Ministry of Education,Jiangxi Normal University,Nanchang 33002.,china 3 The key {2. of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang University,Nanchang 330031,china 1. state key {2. of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China 2. key laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education Jiangxi Normal University Nanchang 330022 China 3. The key laboratory of Poyang Lake Environment and Resource Utilization Ministry of Education Nanchang University Nanchang 330031 China

This paper demonstrates an atmospheric correction method to process HJ-1A/B CCD images over Chinese coastal waters with the aid of MODIS-Terra aerosol *** on the assumption of zero water-leaving radiance at the two near-infrared (NIR)bands or the shortwave infrared(SWIR)bands,the atmospheric aerosol optical depth(AOD)is firstly retrieved from MODIS-Terra with a simple extension of the NIR-SWIR combined atmospheric correction approach embedded in SeaDAS (SeaWiFS data analysis system).Then the"turbid"and"non-turbid"waters are separated by the turbid water *** probability of AOD at 551 nm band is derived based on the NIR information over"non-turbid"waters and FLAASH model is selected to do the atmospheric correction of the HJ-1A/B CCD imagery using the AOD values of highest probabilities as ***,according to the histogram of the AOD distribution at 551 nm band,the studied turbid water area is divided into several blocks and HJ-1A/B CCD imagery is corrected with the corresponding AOD values displayed with the highest frequency in each *** method has been applied to several HJ-1A/B images over Chinese coastal waters and validated by synchronous in-situ *** results have shown that this method is effective in the atmospheric correction process of HJ-1A/B CCD images for ocean color remote sensing study and application in the coastal waters.

关键词： ocean color remote sensing atmospheric correction turbid coastal waters HJ-1A/B MODIS

Processing Approach of Non-linear Adjustment Models in the Space of Non-linear Models

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Geo-Spatial Information Science 2003年第2期6卷 25-30页

作者： LI Chaokui ZHU Qing SONG ChengfangLI Chaokui,associate professor,Ph.D,state key {2. of Information Engineering in Surveying,Mapping and remote {4.,Wuhan University,12. Luoyu Road,Wuhan 4.0079,china. state key {2. of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University

This paper investigates the mathematic features of non-linear models and discusses the processing way of non-linear factors which contributes to the non-linearity of a non-linear model. On the basis of the error definition,this paper puts forward a new adjustment criterion, ***,this paper investigates the solution of a non-linear regression model in the non-linear model space and makes the comparison between the estimated values in non-linear model space and those in linear model space.

关键词： non-linear adjustment model model space multi-robustness

THE LAND USE INVESTIGATION IN TIBET PLATEAU USING remote sensing TECHNOLOGY

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遥感信息 1990年第A2期12卷 5-6页

作者： Liu Jiyuan(The institute of remote {2. Application, Academia Sinica, beijing)

Tibet Plateau is Known as "the Roof of the World" with the area of 1,2.0,000km^2. which is about 1/8 land area of china. Because of the high elevation, cold climate and it caused difficulties in regional economic planning and land resources management. Since 1985, the land use investigation in Tibet has been carried out, in which the basic data and thematic maps must be obtained and completed at county and township levels, in order to meet the needs of local administrations. In the investigation, remote {2. technology was comprehensively adopted. At present, the investigation in county level had been completed and the compilation is going to be carried out. Due to paying a great attention to studying on a series of key technical problems, the systematic methods of using remote {2. technology in the plateau land use investigation were formed and successfully put into application.

关键词： data THE LAND USE INVESTIGATION IN TIBET PLATEAU USING remote sensing TECHNOLOGY

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2.07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 {2.,P.O.Box 982.,{4. 10002.,PR china b state key laboratory of remote sensing Science,Jointly Sponsored by the institute of remote sensing applications of Chinese academy of {2. and {4. Normal University,{4. 100101,PR china c Department of Mathematics,Liaocheng University,Shandong 2.2.59,PR china d School of Geography,{4. Normal University,{4. 100875,PR china

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

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三维地形数据的简化和空间分析的研究

系统仿真学报 2004年第3期16卷 608-611页

作者：张立强杨崇俊刘冬林中国科学院遥感应用研究所遥感科学国家重点实验室北京100101

全球地形场景的建模是一个极富有挑战性的课题。地形动态简化是构建三维地形场景和虚拟现实的重要内容,基于视相关的地形裁剪技术是动态简化庞大地形数据的重要方法。本文根据地球椭球的特性,提出了在当前LOD层次下,实时裁剪视景体中的... 详细信息

全球地形场景的建模是一个极富有挑战性的课题。地形动态简化是构建三维地形场景和虚拟现实的重要内容,基于视相关的地形裁剪技术是动态简化庞大地形数据的重要方法。本文根据地球椭球的特性,提出了在当前LOD层次下,实时裁剪视景体中的地形数据的算法。精确拾取地形点的三维大地坐标是进行正确的三维空间分析和查询操作的基础,也是3DGIS研究中的一个难点;而可视性分析是三维空间分析的重要研究内容。本文给出了这些的问题的算法。实验证明,这些算法具有较好的实用性。

关键词：全球地形可视化地形裁剪 3D大地坐标可视域分析

Eco-environment evolvement analysis of Ertan reservoir catchment based on remote sensing

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Science china(Technological sciences) 2011年第S1期54卷 95-100页

作者： PANG ZhiGuo ,GE DeXiang & FU Jun E state key {2. of Simulation and Regulation of Water Cycle in River Basin,,china {4. of Water Resources and Hydropower Research,beijing 10004.,china 1. state key {2. of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing 100048 China

Hydropower project may bring with it social-economic profits as well as side *** built dam and reservoir often cause some problems to the surrounding areas,among which the ecological and environmental effects caused by hydropower projects are always concerned by the *** this article,we take the Ertan reservoir catchment as the research area and try to quantitatively analyze the variation of vegetation cover and soil erosion by remote sensing technique,and to comprehensively assess the evolvement and development trend of reservoir *** erosion,land use/cover are used as ecological and environmental indicators which reflect the changes before,after and in the period of the construction of Ertan hydropower *** by the multi-source remote sensing data(from satellite Landsat and CBERS) and DEM data,the land use/cover is interpreted through RS images which are classified both by unsupervised and supervised method,and the driving factors of the ecological changes are also *** the same time,the changes of soil loss are also monitored and analyzed during flood seasons of Ertan reservoir area before and after reservoir impoundment(1995,{4.00 and {4.05) using the revised universal soil loss equation(RUSLE) .The results show that during the recent 13 years the arable land area has decreased obviously,and construction area and water surface have increased *** increase of vegetation cover has some relations with the implementation of local ecological projects,i.e.,de-farming to forestry and de-farming to pasture *** the same time,changes may also be caused by the climate adjustment in the reservoir *** the ten years from 1995 to {4.05,the high soil loss classes were transforming to lowly level classes *** of these show that the soil loss of Ertan reservoir area is getting better.

关键词： Ertan reservoir catchment eco-environment land use/cover soil loss remote sensing