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Biomass estimation and uncertainty analysis based on CBERS-02.CCD camera data and field measurement

Science China(Technological Sciences) 2005年第S2期48卷 116-128页

作者： CHEN Liangfu1,2. GAO Yanhua1,3. CHENG yu1,3. WEI Zheng1,3. XIAO Qing1,4. LIU Qinhuo1, yu Tao1, LIU Qijing5, GU Xingfa1 & TIAN Guoliang1 1. State Key Laboratory of Remote Sensing Science, {2. of Remote Sensing Applications, Chinese academy of Sciences, beijing 100101, China 2. Geography and Environment College, Jiangxi Normal University, Nanchang 3.002., China 3. Graduate University of Chinese academy of Sciences, beijing 10003., China 4. beijing Research {2. of Uranium geology, beijing 100875, China 5. {2. of Geographic Sciences and Natural Resources Research, Chinese academy of Sciences, beijing 100101, China 1. State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences 100101 Beijing China 2. Geography and Environment College Jiangxi Normal University 330027 Nanchang China 3. Graduate University of Chinese academy of Sciences 100039 Beijing China 4. beijing Research institute of Uranium {2. 100875 Beijing China 5. institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China

The study site is located in Qianyanzhou experimental station and the surrounding area. Based on CBERS-02.satellite data and field measurement, we not only discussed the relationship between NDVI and biomass of two species of coniferous plantations, namely, Pinus massoniana Lamb and Pinus elliottii Engelm, but also introduced the biomass models based on NDVI. The comparison between measured biomass in Qianyanzhou and biomass derived from CBERS-02.CCD data showed that it is feasible to estimate biomass based on NDVI. But its limitations cannot be ignored. This kind of model depends on the dominant vegetation species. There are some effect factors in estimating biomass based on NDVI. This paper analyzes these factors based on fine-resolution CBERS-02.CCD data and some conclusions are drawn: In Qianyanzhou, the area with good vegetation coverage, the nonlinearity of NDVI has little influence on scaling-up of NDVI. As a result of surface heterogeneity, scaling-up can cause NDVI within each pixel to change. Because scaling-up can cause pixel attribute to change, the applicability of biomass model is one of the sources of error in estimating biomass.

关键词： NDVI biomass scaling effect scaling-up.

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The age of the plant fossil assemblage in the Liuqu Conglomerate of southern Tibet and its tectonic significance

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Progress in Natural Science:Materials International 2006年第1期16卷 55-64页

作者： FANG Aimin1, YAN Zhen1, LIU Xiaohan2. PAN yusheng1, LI Jiliang1, yu Liangjun1, HUANG Feixing2.and TAO Junrong{4.(1.Laboratory of Lithosphere Tectonic Evolution, {2. of geology and Geophysics, Chinese academy of Sciences, beijing 10002., China 2. {2. of Tibet Plateau Research, Chinese academy of Sciences, beijing 100085, China {4. {2. of Botany, Chinese A cademy of Sciences, beijing 10009{4. China) Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China institute of Tibet Plateau Research Chinese Academy of Sciences Beijing 100085 China institute of Botany Chinese A-cademy of Sciences Beijing 100093 China

The Liuqu Conglomerate, situated to the south of Yarlung Tsangbo Suture Zone (YTSZ), is a suit of molasse formed in a foreland basin of the Himalayan orogenic belt after the collision between the two plates of the Indian and Eurasion, It is of great significance in constraining the younger limit time of the collision of the two plates and providing stratigraphic evidence to reveal the post-colli sional tectonic evolution and uplifting history of the Tibet plateau. However, the age of this molasse suit and its correlation to other synchronous strata distributed in southern Tibet have been in great disputes for a long time. Especially in recent years, argues on its ages are growing violently with the recognition of the great sedimentary tectonic significances of this molasse. During the field work carried out recently on this molasse suit, a lot of plant fossils were found preserved in fairly good conditions in the upper part of this strata, which is of great help in determining its age. By identification, the assemblage of the plant fossils belongs to a tropic to subtropic flora developed in the southern margin of the Northern Hemisphere supercontinent during the Middle to Later Eocene, which can provide good constraint on its formation age. This paper is to give a brief introduction of the plant assemblage and its age, and to discuss their tectonic significances.

关键词： Liuqu conglomerate plant fossils age Eocene Tectonic implications.

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Erratum to“Gravity-Dependent Animacy Perception in Zebrafish”

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Research 2024年第3期6卷 799-800页

作者： Xiaohan Ma Xiangyong yuan Jiahuan Liu Li Shen Yiwen yu Wen Zhou {2. Liu Yi Jiang State Key Laboratory of Brain and Cognitive Science CAS Center for Excellence in Brain Science and Intelligence TechnologyInstitute of PsychologyChinese Academy of SciencesBeijing 100101China University of Chinese academy of Sciences Beijing 100049China Chinese institute for Brain Research Beijing 102206China State Key Laboratory of Brain and Cognitive Science Institute of BiophysicsChinese Academy of SciencesBeijing 100101China institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China

In the Research Article“Gravity-Dependent Animacy Perception in Zebrafish”[1],there was an error when calculating the velocity and acceleration of the human and pigeon BM stimuli provided by other researchers in ***... 详细信息

关键词： acceleration finding Zebrafish

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Chengdeite-A New Mineral of Ordered Natural Iron-iridium Alloy

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Acta Geologica Sinica(English Edition) 1996年第1期70卷 27-32,108页

作者： yu zuxiang institute of geology, Chinese academy of Geological Sciences,{2.

Chengdeite occurs in chromite orebodies in dunite as well as in placers in their neighbourhood. The mineral occurs as granular aggregates in association with inaglyite and in some cases occurs as graphic intergrowths with native iridium. It is opaque with a metallic lustre, colour steel-black, streak black,HM = 5.2. VHN50=4.2.kg/mm2. cleavage not observed, fracture not observed, strongly magnetic. Its reflection colour is bright white with a yellowish tint. It has no internal reflection, bireflectance or pleochrism, and shows *** chemical analyses were carried out by means of the electron microprobe. The mean percentages of the data obtained in the 13.analyses ares S 0.001, Fe 7.9, Ni 0.03. Co 0.03. Cu 0.83. As 0.02. Rh 0.19, Pd 0.00, Os 0.06, Ir 88.5, Ft 2.2.and Pb 0.00. The simplified formula is Ir3.e, which requires Ir 91.17 and Fe 8.83. the total being 100.00 (% ).Five strongest lines of X-ray powder diffraction (hkl, d, I)are: 111, 2.18 (80);2.0, 1.89 (60); 2.0, 1.3. (70);3.1, 1.14.0}(100);2.2.1.094.(80).Through indexing of the X-ray powder diffraction data, the mineral has been determined to be cubic with Pm 3., a = 0.3.92.5)nm, V = 0.054.3.m and Z = 1.

关键词： new mineral chengdeitc chromite ore

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Digital image analysis of palaeoenvironmental records and applications

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Chinese Science Bulletin 2002年第23期47卷 1957-1963,2025-2026页

作者： SUN Donghuai1,2. LIU yu2.& TAN Ming3.. South China Sea {3. of Oceanology, Chinese {2. of Sciences. Guangzhou 5103.1, China 2. State Key Laboratory of Loess and Quaternary geology, Earth Environmental {3., Chinese {2. of Sciences, Xi’an 710075, China 3. {3. of geology and Geophysics, Chinese {2. of Sciences, beijing 10002., China South China Sea institute of Oceanology Chinese Academy of Sciences Guangzhou China State Key Laboratory of Loess and Quaternary geology Earth Environmental Institute Chinese Academy of Sciences Xi’an China institute of geology and Geophysics Chinese Academy of Sciences Beijing China

Environmental change signals in geological or biological records are commonly reflected on their reflecting or transmitting images. These environmental signals can be extracted through digital image analysis. The analysis principle involves section line selection, color value reading and calculating environmental proxy index along the section lines, layer identification, auto-chronology and investigation of structure evolution of growth bands. On detailed illustrations of the image technique, this note provides image analyzing procedures of coral, tree-ring and stalagmite records. The environmental implications of the proxy index from image analysis are accordingly given through application demonstration of the image technique.

关键词： digital image environmental records.

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Malanite——A New Cupric Platinum (Pt^(3.)) and Iridium (Ir^(3.)) Sulphide

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Acta Geologica Sinica(English Edition) 1997年第2期71卷 152-157,233页

作者： yu zuxiang institute of geology, Chinese academy of Geological Sciences,{2., 10003. institute of geology Chinese Academy of Geological Sciences Beijing 100037 [?]yu Zhuxiang Born in Nov. 193. graduated from the Specialty of Petrology and Mineralogy of the Department of geology Beijing College of Geology in 1953. He has long engaged in the study of mineralogy as Research Professor at the Institute of Geology Chinese Academy of Geological Sciences.

Malanite was first found in veinlets of disseminated copper-nickel ores inZunhua County, Hebei Province, and then in platinum-bearing chromite ores in ShuangfengVillage, Yanshan. In the former case, malanite appears as octahedrons or dodecahedrons asso-ciated with pyrrhotite, pentlandite, sperrylite and cooperite; while in the latter case, it is massiveor present in anhedral glomerocrysts, filling in cracks of iridisite and associated with osmiride,ferrian platinum and iridisite. Malanite is steel-grey in colour, opaque with metallic lustre andblack streaks and brittle with no magnetism. H_M=5.0, VHN_(2.)=4.7kg/mm^2. cleavage {111}sometimes observed. The calculated density is 7.57g/cm^3. The reflective colour is white with alight green tint. Internal reflections are not observed. This mineral is isotropic, showing nobireflection or reflection pleochroism in air. By means of electron microprobe analysis, the em-pirical formula (based on 7 atoms) is expressed as (Cu_(0.93.Fe_(0.06))_(∑0.99)(Pt_(1.03.Ir_(0.66)Rh_(0.04.Pd_(0.03.Co_(0.2.)Ni_(0.03.)_(1.99)S_(4.03. or (Cu_(0.95)Fe_(0.07))_(∑1.02.(Pt_(1.3.)Ir_(0.4.)Co_(0.11)Rh_(0.08))_(∑2.01)S_(3.97). Five strongestlines (hkl, d, I) of X-ray powder diffraction data of malanite are 3.1,2.98(6); 4.0,2.4.(5);3.3. 1.90(7); 4.0, 1.75(10); 73., 1.2.(5). It was known on the basis of X-ray powder diffractiondata that malanite is cubic, and the space group is Fd3. with α=0.994.nm, V=0.982.(3.nm^3.and Z=4. The type material of malanite is deposited at the Geological Museum of China(GMC)s

关键词： new mineral malanite chrome ore

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New Data of Daomanite and Hongshiite

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Acta Geologica Sinica(English Edition) 2001年第4期75卷 458-465页

作者： yu zuxiang institute of geology, Chinese academy of Geological Sciences,{2. 10003. Fei Zhenbi institute of geology Chinese Academy of Geological Sciences Beijing 100037 [?]2.0} zuxiang Born in 193. graduated from beijing College of geology in 1953 now research professor at the institute of geology CAGS. He has long engaged in the study of platinum minerals and mineral deposits. Tel.: (010)68328449.

In 1974.the author preliminarily reported two new platinum group minerals—daomanite and hongshiite. The two minerals were accepted by the Commission on New Minerals and Minerals Names of the International Mineralogical Association in 1976 and 1982.respectively. Because of the conditions at that time, the work was preliminary, for example, there were only reflectance values of four wave bands. Recently the author again made measurements of reflectances, corrected cell parameters by the four-circle diffractometer and electron diffraction and supplemented their new occurrences and nomenclature.

关键词： daomanite hongshiite new data

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Characteristics of the Middle-Late Triassic sedimentary facies assemblages in the Songpan-Ruoergai area

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Progress in Natural Science:Materials International 2007年第3期17卷 305-313页

作者： YAN Zhen, yu Liangjun, LI Jiliang, BIAN Qiantao, WANG Zongqi and YANG Yongcheng ( institute of {2., Chinese {3. of Geological Sciences,{4. 10003., China State Key Laboratory of Lithospheric Evolution, institute of {2. and Geophysics, Chinese {3. of Sciences,{4. 10002., China Shaanxi Insititute of {2. Survey, Xianyang 712.00, China) [a]institute of geology Chinese Academy of Geological Sciences Beijing China [b]State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China [c]Shaanxi Insititute of geology Survey Xianyang China

The Middle-Late Triassic sedimentary rocks in the Songpan-Ruoergai area mainly consist of calcareous siltstone, muddy limestone, lithic arkose, feldspathic litharenite, mudstone, wormkalk, oolithic limestone, and conglomerate. Except for limestone bed increasing eastward longitudinally and vertically, the calcareous component of the sandstones increases obviously. Abundant benthic and plant fossils and their clasts occur within these rocks. The sedimentary structures predominately contain flaser, parallel, tabular, wavy, and herringbone cross beddings. These data coevally imply that the Middle-Late Triassic sediments deposited in the fluvial, lake and tide environments. Additionally, the rocks display graded, parallel, hummocky beddings, and sandy lamination, a feature characteristic of storm deposits.

关键词： Middle-Upper Triassic fluvial-lake environments tide environment tempestite Songpan-Ruoergai

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Impact of the closure of Indonesian seaway on climate: A numerical modeling study

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Chinese Science Bulletin 2003年第S2期48卷 88-93页

作者： yu Yongqiang, ZHOU Zuyi & ZHANG Xuehong 1. LASG, institute of Atmospheric Physics, Chinese {2. of Sciences,{3. 10002., China: 2. Laboratory of Marine geology, Tongji University, Shanghai 2.0092.China Chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China Tongji Univ Lab Marine Geol Shanghai 200092 Peoples R China

Using a global OGCM and its relevant coupledocean-atmosphere GCM with the contemporary, 6 MaBPand 14.MaBP oceanic topography, respectively, a series ofnumerical experiments are implemented in order to investi-gate the effect of the north shift of Australian continent onthe tropical oceanic circulation, especially the formation ofthe western Pacific warm pool. The numerical experimentsof the individual OGCM forced by the modern atmosphericcirculation indicate that the closure of Indonesian passageresults in warming in the tropical Pacific Ocean and coolingin the tropical Indian Ocean; furthermore, it also results inchange in source of the Indonesian Through Flow (ITF) wa-ter, e.g. ITF mainly originates from the south Pacific at 14.aBP, but it mainly originates from the north Pacific *** coupled model shows similar results as the individualOGCM qualitatively.

关键词： Indonesian Through Flow (ITF) Western Pacific Warm Pool Australian Plate Paleo-oceanography.

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A study of interaction between surface water and groundwater using environmental isotope in Huaisha River basin

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Science China Earth Sciences 2006年第12期49卷 1299-1310页

作者： SONG Xianfang1, LIU Xiangchao1, 2. XIA Jun1, yu Jingjie1 & TANG Changyuan1, 3.1. Key Laboratory of Water Cycle and Related Land Surface Processes, {2. of Geographical Sciences and Natural Re- sources Research, Chinese academy of Sciences, beijing 100101, China 2. College of River and Ocean, Chongqing Jiaotong University, Chongqing 4.0074. China 3. Chiba University, Chiba 2.3.852., Japan 1. Key Laboratory of Water Cycle and Related Land Surface Processes Institut of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China 2. College of River and Ocean Chongqing Jiaotong University Chongqing 400074 China 3. Chiba University Chiba 263-8522 Japan

The surface water and groundwater are important components of water cycle, and the interaction between surface water and groundwater is the important part in water cycle research. As the effective tracers in water cycle research, environmental isotope and hydrochemistry can reveal the interrelationships between surface water and groundwater effectively. The study area is the Huaisha River basin, which is located in Huairou district, beijing. The field surveying and sampling for spring, river and well water were finished in 2.02.and 2.0{4. The hydrogen and oxygen isotopes and water quality were measured at the laboratory. The spatial characteristics in isotope and evolution of water quality along river lines at the different area were analyzed. The altitude effect of oxygen isotope in springs was revealed, and then using this equation, theory foundation for deducing recharge source of spring was estimated. By applying the mass balance method, the annual mean groundwater recharge rate at the catchment was estimated. Based on the groundwater recharge analysis, combining the hydrogeological condition analysis, and comparing the rainfall-runoff coefficients from the 1960s to 1990s in the Huaisha River basin and those in the Chaobai River basin, part of the runoff in the Huaisha River basin is recharged outside of this basin, in other words, this basin is an un-enclosed basin. On the basis of synthetically analyses, combining the compositions of hydrogen and oxygen isotopes and hydrochemistry, geomorphology, geology, and watershed systems characteristics, the relative contributions between surface water and groundwater flow at the different areas at the catchments were evaluated, and the interaction between surface water and groundwater was re- vealed lastly.

关键词： environmental isotope,hydrochemistry,surface water,groundwater,interaction.

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