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Spatial distribution of wind erosion and its driving factors in china

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Journal of geographical Sciences 2001年第2期11卷 127-139页

作者： ZHANG Guo-ping~1, ZHANG Zeng-xiang~1, LIU Ji-yuan~2.(1. Institute of Remote sensing Application, CAS, beijing 100101, {2. 2. Institute of Geographic Sciences and Natural Resources Research, CAS, beijing 100101, {2.) Institute of Remote sensing Application CAS Institute of Geographic Sciences and Natural Resources Research CAS

Based on remote sensing and geographic information system, the spatial distribution of nation-wide wind erosion is studied, and the 1∶100 000 national map of soil erosion by wind in {2. is made. Wind speed, soil dryness,NDVI, soil texture and the slope of land surface are the key factors to wind erosion. The relations between wind erosion and each factor are discussed. The method of principal component is used to pick up the information included in the five factors, and the wind erosion dynamic index (WEDI) is established. Its comparison with theRS/GIS derived data shows thatWEDI can reflect the potential capacity of soil erosion by wind. The dynamic process of the wind erosion is studied to reveal the distribution of the most intense wind erosion regions and the dominant factors in these regions. All these studies may greatly help the mitigation of wind erosion of soil.

关键词： remote sensing geographic information system wind erosion of soil desertification control in china WEDI

The Anti-Vibrating-Impact Research of the Piezoelectric Resonator Force Sensor

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稀有金属材料与工程 2006年第S3期 625-626页

作者： Junling Lu~1 Wenjie Tian~2.Lingling Liu~2.Fuxue Zhang~2.(1.Department of Physics,Tsinghua university,{4. 100084.{2.) (2.Research Center of Sensor Technology,{4. information Technology Institute,{4. 100101,{2.)

Based on the analysis of one-dimension inertial accelerometer movement model,from which the resolution of the accelerometer inertial mass displacement equation was derived,the response of the sensor sensing element to vibration and impact of various frequencies was *** theoretical and experimental results show that a reasonable configuration among the sensing element inherent frequency,environmental exciting frequency and the damp factors of the sensor is the key to prevent the sensor from *** sensor has good anti-vibrating impact ability when the relative damp factor is 0.7,and the environmental interferential vibrating frequency is less than 0.35 times of the inherent frequency of the sensing element.

关键词： piezoelectric resonator force sensor vibrating impact sensor-adapted ability

A study on correlativity between Qinghai-Tibet Plateau thermal infrared remote sensing data and underground temperature

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Science china(Technological Sciences) 2006年第z2期49卷 114-120页

作者： HAN Liqun, BI Siwen & SONG Shixin School of information Engineering, beijing Technology and Business {2., beijing 100037, {4. Key Laboratory of Remote sensing information Sciences, Institute of Remote sensing Applications, Chinese Academy of Sciences, beijing 100101, {4. beijing Technol & Business Univ Sch Informat Engn Beijing 100037 Peoples R China Chinese Acad Sci Inst Remote Sensing Applicat Key Lab Remote Sensing Informat Sci Beijing 100101 Peoples R China

Based on an analysis of the correlativity between Qinghai-Tibet Plateau thermal infrared remote sensing data (QPTIRSD) and underground temperature field distribution, the main factors which obviously influence underground-layer temperatures were derived. Using neural network technology, a model was built to compute underground temperatures via parameters out of the inversion of thermal infrared remote sensing (TIRS) and then analyze the correlativity between above-ground parameters and underground temperatures. This method offers a new way to apply TIRS in monitoring the suture zone of a large-area massif as well as to research structural thermal anomalies.

关键词： Qinghai-Tibet Plateau, TIRS, artificial neural network, temperature.

Lunar surface dielectric constant,regolith thickness, and ~3He abundance distributions retrieved from the microwave brightness temperatures of CE-1 Lunar Microwave Sounder

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Science china Earth Sciences 2010年第9期53卷 1365-1378页

作者： WANG ZhenZhan1, LI Yun1,2. JIANG JingShan1 & LI DiHui1 1 National Microwave Remote sensing Laboratory, Center for Space Science and Applied Research, Chinese Academy of Sciences, beijing 100190, {2. 2.Graduate university of Chinese Academy of Sciences, beijing 10004., {2. 1. National Microwave Remote sensing Laboratory Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China

Lunar regolith parameters, such as physical temperature, thickness and dielectric constant, are important in studying regolith features, distribution of lunar resources and evolution of the Moon. There had been no measurement obtained by lunar-orbit-borne microwave radiometer applied to evaluate the properties of lunar regolith before CE-1 Lunar Microwave Sounder (CELMS) being launched. CEMLS is the first passive microwave radiometer in the world to sound the surface of the Moon. The brightness temperatures (TB) sensed by CELMS include complicated information on the above geophysical parameters. In this paper, algorithms of retrieving dielectric constant, regolith thickness, and 3He content from CELMS brightness temperatures are developed, and the results are compared with those from literature. The results show that the regolith thicknesses are mostly in the range of 4.0-6.0 m, and 4.% of them are bigger than 5.0 m. The content of 3He evaluated by retrieved regolith thickness is about 1.03 million tons.

关键词： CE-1 Lunar Microwave Sounder (CELMS) lunar regolith dielectric constant lunar regolith thickness 3He retrieval

Study on Water Consumption Coefficient of People's Living and Its Regional Disparity in the North of china

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Chinese Journal of Population,Resources and Environment 2005年第2期3卷 20-26页

作者： Wang Jing’ai 1-3, Mao Rui 3,4. Yang Mingchuan 3,4.& Zhou Junju 11 College of Geography & Remote sensing 2.Key Laboratory of Regional Geography of beijing Normal {2. 3 Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education of {4. 4.College of Resources Science & Technology, beijing Normal {2., beijing 100875, {4. College of Geography and Remote sensing Beijing 100048 China Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education of china Beijing 100048 China College of Resources Science and Technology Beijing Normal University Beijing 100875 China

By employing the information-reshufflingmethod that integrates census data, precipitation dataand inquiry data of water consumption, this paperdiscusses 5 (water consumption coefficient of people’sliving) in allusion to different precipitation zones anddifferent periods of time. The study shows that 5-(water consumption coefficient of urban people’sliving), 5. (water consumption coefficient of ruralpeople’s living) and increase with time passing, andthe increasing extent of 5 is 1.84. 2.62. 2.84.and 2.68times respectively from the west to the east, whichresults from the total quantity of water resources andthe speed of urbanization. 5- and 5. of eachprecipitation zone increased with 5- increasing morequickly than 5., and the difference between the twoalso increased when time passed. In the past fifty years(1950-2.00), the increasing extent of 5- was 1.71,2.96, 2.4. and 2.33 times respectively from the westto the east, in which 2.0-4.0mm precipitation zoneincreased more than others. Meanwhile the increasingextent of 5. is 1.55, 1.60, 1.53 and 1.64.timesrespectively from the west to the east with eachprecipitation zone increasing similarly. The change of5-is due to the speed of urbanization and the stabilityof water resources. This study provides basis forcalculating the water demand of people’s living andrevealing the impact of water demand of people’s livingon ecological drought in different zones.

关键词： The north of china precipitation zone water consumption coefficient of people’s living

The retrieval of two-dimensional distribution of the earth's surface aerodynamic roughness using SAR image and TM thermal infrared image

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Science china Earth Sciences 2004年第12期47卷 1134-1146页

作者： ZHANG Renhua 1 ,WANG Jinfeng 1 ,ZHU Caiying 1,2.,SUN Xiaomin 1 & ZHU Zhilin 1 1.Institute of geographical Sciences and Natural Resources,Chinese Academy of Sciences,beijing 100101,{2. 2.Institute of Surveying and Mapping,information Engineering university of the Chinese People’s Liberation Army,Zhengzhou 4.0052.{2. 1. Chinese Academy of Sciences Institute of Geographical Sciences and Natural Resources 100101 Beijing China 2. information Engineering university of the Chinese People’s Liberation Army Institute of Surveying and Mapping 450052 Zhengzhou China

After having analyzed the requirement on the aerodynamic earth’s surface rough- ness in two-dimensional distribution in the research field of interaction between land surface and atmosphere, this paper presents a new way to calculate the aerodynamic roughness using the earth’s surface geometric roughness retrieved from SAR (Synthetic Aperture Radar) and TM thermal infrared image data. On the one hand, the SPM (Small Perturbation Model) was used as a theoretical SAR backscattering model to describe the relationship between the SAR back- scattering coefficient and the earth’s surface geometric roughness and its dielectric constant re- trieved from the physical model between the soil thermal inertia and the soil surface moisture with the simultaneous TM thermal infrared image data and the ground microclimate data. On the basis of the SAR image matching with the TM image, the non-volume scattering surface geo- metric information was obtained from the SPM model at the TM image pixel scale, and the ground pixel surface’s equivalent geometric roughness—height standard RMS (Root Mean Square) was achieved from the geometric information by the transformation of the typical to- pographic factors. The vegetation (wheat, tree) height retrieved from spectrum model was also transferred into its equivalent geometric roughness. A completely two-dimensional distribution map of the equivalent geometric roughness over the experimental area was produced by the data mosaic technique. On the other hand, according to the atmospheric eddy currents theory, the aerodynamic surface roughness was iterated out with the atmosphere stability correction method using the wind and the temperature profiles data measured at several typical fields such as bare soil field and vegetation field. After having analyzed the effect of surface equivalent geo- metric roughness together with dynamic and thermodynamic factors on the aerodynamic surface roughness within the working area, this paper first establishe

关键词： surface geometric roughness, aerodynamic surface roughness, SAR backscattering model, moisture retrieval model, roughness transformation model.

Spotlight SAR sparse sampling and imaging method based on compressive sensing

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Science china(information Sciences) 2012年第8期55卷 1816-1829页

作者： XU HuaPing1,YOU YaNan1,LI ChunSheng1&ZHANG LvQian2.1S chool of Electronics and information Engineering,Beihang university,{2. 100191,{4. 2. hinese Academy of Engineering,{2. 100088,{4. 1. School of Electronics and information Engineering Beihang University Beijing 100191 China2. Chinese Academy of Engineering Beijing 100088 China

Spotlight synthetic aperture radar(SAR)emits a chirp signal and the echo bandwidth can be reduced through dechirp processing,where the A/D sampling rate decreases accordingly at the *** sensing allows the compressible signal to be reconstructed with a high probability using only a few samples by solving a linear program *** paper presents a novel signal sampling and imaging method for application to spotlight SAR based on compressive *** signal is randomly sampled after dechirp processing to form a low-dimensional sample set,and the dechirp basis is imported to reconstruct the dechirp *** pursuit(MP)is used as a reconstruction *** reconstructed signal uses polar format algorithm(PFA)for *** our novel mechanism increases the system complexity to an extent,the data storage requirements can be compressed *** simulations verify the feasibility and accuracy of spotlight SAR signal processing via compressive sensing,and the method still obtains acceptable imaging results with 10%of the original echo data.

关键词： spotlight SAR dechirp processing compressive sensing radar signal processing

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({2. Campus), {2. 100083, china 2. Hebei Polytechnic university, Tangshan 063009, china 3. Xuzhou Normal university, Xuzhou 2.1009, china 4. Tangshan Branch, china Coal Research Institute, Tangshan 063012. china 5. Henan Polytechnic university, Jiaozuo 4.4.00, china 6. {2. Forestry university, {2. 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

Influence factors of sparse microwave imaging radar system performance:approaches to waveform design and platform motion analysis

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Science china(information Sciences) 2012年第10期55卷 2301-2317页

作者： ZHANG Zhe 1,2.3,ZHANG BingChen 1,2.JIANG ChengLong 1,2.3,XIANG Yin 1,2.HONG Wen 1,2.& WU YiRong 1,2.1 Science and Technology on Microwave Imaging Laboratory,beijing 100190,china 2.Institute of Electronics,Chinese Academy of Sciences,beijing 100190,china 3 Graduate university,Chinese Academy of Sciences,beijing 100190,china 1. Science and Technology on Microwave Imaging Laboratory Beijing 100190 China 2. Institute of Electronics Chinese Academy of Sciences Beijing 100190 China 3. Graduate university Chinese Academy of Sciences Beijing 100190 China

Sparse microwave imaging radar is a newly developed concept of microwave imaging system,which tries to combine the traditional radar imaging system with sparse signal processing theories,achieving the aim of reducing the complexity of microwave imaging systems and enhancing the system *** this paper,we introduce some basic concepts of sparse signal processing theory,and then apply it to the traditional radar imaging system to get the mathematical model of sparse microwave imaging *** analyze the factors that determine the performance of sparse microwave imaging radar,including scene,waveform and *** to the radar model,we analyze how these factors influence the radar system and how to optimize *** results of the sparse microwave imaging radar system are also provided.

关键词： sparse microwave imaging radar synthetic aperture radar compressive sensing Lq regularization waveform design