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Polynomial analysis of canopy spectra and biochemical component content inversion

Science china Earth sciences 2005年第10期48卷 1780-1791页

作者： YAN Chunyan1, LIU Qiang1, NIU Zheng1, WANG Jihua2. HUANG Wenjiang2.& LIU Liangyun 2.1. 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,{2. 2. national Engineering Research Center for Information Technology in Agriculture, Beijing 100089,{2. Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of sciences and Beijing Normal University national Engineering Research Center for Information Technology in Agriculture

A polynomial expression model was developed in this paper to describe directional canopy spectra, and the decomposition of the polynomial expression was used as a tool for re-trieving biochemical component content from canopy multi-angle spectra. First, the basic formula of the polynomial expression was introduced and the physical meaning of its terms and coeffi-cients was discussed. Based on this analysis, a complete polynomial expression model and its decomposition method were given. By decomposing the canopy spectra simulated with SAILH model, it shows that the polynomial expression can not only fit well the canopy spectra, but also show the contribution of every order scattering to the whole reflectance. Taking the first scattering coefficients a10 and a01 for example, the test results show that the polynomial coefficients reflect very well the hot spot phenomenon and the effects of viewing angles, LAI and leaf inclination angle on canopy spectra. By coupling the polynomial expression with leaf model PROSPECT, a canopy biochemical component content inversion model was given. In the simulated test, the canopy multi-angle spectra were simulated by two different models, SAILH and 4-SCALE re-spectively, then the biochemical component content was retrieved by inverting the coupled polynomial expression + PROSPECT model. Results of the simulated test are promising, and when applying the algorithm to measured corn canopy multi-angle spectra, we also get relatively accurate chlorophyll content. It shows that the polynomial analysis provides a new method to get biochemical component content independent of any specific canopy model.

关键词： polynomial expression, canopy spectra, decomposition, biochemical component content, inversion.

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Exact Approaches to Quantum Dissipative Dynamics

Exact Approaches to Quantum Dissipative Dynamics

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中国化学会第九届全国量子化学学术会议

作者： Rui-Xue Xu, YiJing Yan hefei national{2. for physical sciences at microscale, University of Science and Technology of china,hefei, Anhui 2.002., china

＜正＞Exact quantum master equation is constructed in the form of hierarchically coupled linear equations of motion （EOM） via the calculus on the Feynman-Vernon influence functional path integrals, followed by a parameterization scheme for the bath correlation functions and a hybrid mixed-level truncation scheme to close the resulting EOM. Proposed also is an equivalent dissipative

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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{2., Beijing 100190, china 2.Graduate University of Chinese Academy of{2., Beijing 100049, china national Microwave Remote Sensing laboratory Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of sciences Beijing 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 43% 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

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Solution structure and function of proteins relevant to pre-mRNA splicing

Solution structure and function of proteins relevant to pre-...

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第十一次中国生物物理学术大会暨第九届全国会员代表大会

作者： Yunyu Shi,Jihui Wu,Xiaojuan Huang,Xingsheng Wang hefei national{2. for physical sciences at microscale and school of life sciences,University of Science and Technology of china,hefei,Anhui,2.002.,P.R.

＜正＞Pre-mRNA splicing is a dynamic *** is catalyzed by the spliceosome which is a largemachine formed by an ordered interactions of several small nuclear ribonucleoproteins,U1,

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Photo-induced effect in the layered perovskite manganite La_(1.2.Sr_(1.8)Mn_(1.8)Co_(0.2.O_(7)

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Science china(Physics,Mechanics & Astronomy) 2004年第1期47卷 113-120页

作者： ZHANG Ruili1, DAI Jianming1, SONG Wenhai1, MA Yongqing1, YANG Jie1 & SUN Yuping1,2.1. Key laboratory of Internal Friction and Defects in Solids, Institute of Solid State Physics, Chinese Academy of sciences,{2. 2.0031, china 2. national laboratory of Solid State Microstructures, Nanjing University, Nanjing 2.0008, china Correspondence should be addressed to Zhang Ruili (email: rlzhang@***) Received September 1, 2.03 Key laboratory of Internal Friction and Defects in Solids Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China national laboratory of Solid State Microstructures Nanjing University Nanjing 210008 China

It is helpful to study the photo-induced effect in the perovskite manganites not only for elucidating the mechanism of colossal magnetoresistance (CMR) effect but also for potential applications in technology. The laser-induced effect in the Co doping layered perovskite manganites La1.2.r1.8Mn1.8Co0.2.7 is studied in this paper and the obtained results are also compared with that gained in the Nd-doping manganites with cubic perovskite structure.

关键词： laser, layered perovskite manganites, photo-induced effect, spin-state.

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Discovery and analysis of ultra-micro grinding grain texture in slipping lamellae of ductile-brittle zone

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Science china Earth sciences 2004年第3期47卷 265-271页

作者： GE Heping1, SUN Yan1, LU Xiancai1, ZHU Wenbin1, GUO Jichun1, LIU Deliang2.& Chi-yuen Wang3 1. Department of Earth sciences, Nanjing University, State Key laboratory of Mineral Deposit, Nanjing 2.0093,{2. 2. Department of Earth and Space sciences, University of Science and Technology of{2., hefei 2.002.,{2. 3. Department of Geology and Geophysics, University of California, Berkeley, CA 9472., USA Department of Earth sciences Nanjing University State Key Lab. of Mineral Deposit Nanjing 210093 China Dept. of Earth and Space sciences Univ. of Science/Technology of China Hefei 230026 China Department of Geology and Geophysics University of California Berkeley CA 94720 United States

Based on the observation of the deep bore cores sampled from the State of Cali-fornia, USA, preferred arranged particulate concentration belts were found in the ultra-slipping lamellae. And the same phenomenon was found again later in the bore cores from the petroleum basin in the Northern Shaanxi Province. It may be the product of the dynamic processes involv-ing tumbling, grinding and compresso-shearing functions, so the spherical particulates with ul-tra-size of nm and mm are called grinding grain. The formation of the grinding grains is related with the ductile-brittle deformation, the lateral pressure of the slipping, and the very low grade of dynamic metamorphism of the rocks. Based on the systematic analysis, it is indicated that some elements like Nb and Ta are enriched in the grinding grains in the granitic rocks because of the chemical differentiation, and that the slipping lamellae bearing grinding grains in mudstone with smear efficiency prove a perfect seal for oil and gas reservoirs. Meanwhile, the paper provides bases for the studies on the fast stick-slip movement and shear paradigm.

关键词： slipping lamellae, grinding grain texture, ductile-brittle deformation, smear efficiency.

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Input function and simulated distributions of tritium in the North Pacific

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Science china Earth sciences 2010年第3期53卷 441-453页

作者： BA Qi1,2.& XU YongFu1 1 State Key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 10002.,{2. 2.Graduate University of Chinese Academy of sciences, Beijing 100049,{2. State Key laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of sciences Beijing China

An ocean general circulation model (OGCM) of the North Pacific with a southern open boundary condition is used to simulate the distribution and transport of tritium in the North Pacific. First, the observed tritium in precipitation dataset of GNIP/ISOHIS is chosen, and used to develop an input function of tritium for the model domain from 1951 to 1997 in terms of the triangulation for interpolation. Then, the input function is used as an upper flux for the tritium model. The OGCM with tritium is integrated for 47 years with the initial condition of zero tritium concentrations. Compared with the observations from GEOSECS and WOCE, the model generates a meridional gradient of surface tritium concentrations and the high tritium concentrations in the subsurface layer, which is consistent with that indicated in the observations. The simulated time series of total tritium fluxes from the atmosphere to the ocean shows a spike in 1963. The total inventory of tritium in the ocean changes slowly with time after 1975. Tritium enters the higher-latitude region, and then is mainly transported by the subsurface process towards the equatorial region, which is well simulated in the model. However, the difference mainly occurs at 30°N–40°N, which can be seen also in the simulation of CFCs. This difference may partly originate from the insufficient description of physical processes in the OGCM. Nevertheless, some uncertainties exist in the development of the tritium input function, which can also influence the simulated results.

关键词： North Pacific basin-wide ocean general circulation model tritium input function tritium distributions

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Electronic transport properties of Pd-H junctions between two PdHx （x=0,0.2.,0.5,0.75,1） electrodes: A NEGF+DFT study

Electronic transport properties of Pd-H junctions between tw...

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中国化学会第九届全国量子化学学术会议

作者： Xiaojun Wu, Qunxiang Li and Jinlong Yang hefei national{2. for physical sciences at microscale, University of Science and Technology of china, hefei, 2.002.

＜正＞Using a fully self-consistent non-equilibrium Green’s function method combined with density functional theory, the transport properties of Pd-H junctions between two PdHx （x=0, 0.2.,0.5,0.75, 1.0） electrodes are investigated systematically. Three different hydrogen bridges are considered, including a single hydrogen atom configuration, a hydrogen molecule configurations with the H2.bond axis parallel to the transport direction and a complex Pd2.2.configuration where the H2

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High resolution STM study of oxygen vacancies of TiO2.110)-1×1 and their effects on adsorbed molecules

High resolution STM study of oxygen vacancies of TiO2(110)-1...

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中国真空学会2.06年学术会议

作者： Bine Wang and J.G Hou hefei national{2. for physical sciences at microscale, University of Science and Technology of china, hefei 2.002., Anhui

The study of the TiO2.110)-1×1 surface and the molecule adsorption has attracted much attention in recent years. The adsorption and the dissociation of water and oxygen on TiO2.110) were mostly concerned [1]. However, it is still unclear what the real processes are for these molecules adsorbed on TiO2.110) [2.3]. The most important issues here are quite related to the roles of the oxygen vacancies and the adsorption of background water even at an ultra high vacuum condition.

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Status of study on biological and toxicological effects of nanoscale materials

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Science china Chemistry 2005年第5期48卷 385-394页

作者： WANG Bing1, FENG Weiyue1, ZHAO Yuliang1, XING Gengmei1, CHAI Zhifang1, WANG Haifang2.& JIA Guang3 1. laboratory for Bio-Environmental Health sciences of Nanoscale Materials (Nanosafety Lab), Institute of High Energy Physics, Chi-nese Academy of sciences, Beijing 100049, china 2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, china 3. Department of Occupational and Environmental Health sciences, school of Public Health, Peking University, Beijing 100083, china laboratory for Bio-Environmental Health sciences of Nanoscale Materials (Nanosafety Lab) Institute of High Energy Physics Chinese Academy of Sciences Beijing China College of Chemistry and Molecular Engineering Peking University Beijing China Department of Occupational and Environmental Health sciences School of Public Health Peking University Beijing China

Because the physical and chemical properties of nanosized materials mostly differ from the existing microsized materials, their potential impacts on human health and the envi-ronment will be topics under the serious discussions in press and in a number of international scientific journals. We analyze and summarize the existing data of the experimental study on the biological activities and adverse effects of nanoscale materials/particles including single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron powders. Though some biological behaviors of nanoscale materials observed cannot be understood on the basis of the current knowledge, as the existing data are mostly preliminary, it is too early to make some ex-clusive conclusions on biological activities (or the toxicity) of any of nanoscale materials. The experimental techniques, the current topics, and the future research directions for this new re-search field are also discussed.

关键词： nanomaterials, single wall carbon nanotubes, multi wall carbon nanotubes, titanium oxide and iron, biological activity and toxicological effect.

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