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science china Earth sciences 2004年第9期47卷 794-803页

作者： ZHANG Yueqiao1, CHEN Wen2. 3 & YANG Nong1 1. Institute of Geomechanics, chinese {2. of Geological {2.s, Beijing 100081, china 2. Institute of Geology, chinese {2. of Geological {2.s, Beijing 100037, china 3. Institute of Geology and Geophysics, chinese academy of sciences, Beijing 10002., china Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Based on field geological survey, structural measurements and classical Ar/Ar dating of mica, biotite and K-feldspar, we obtain cooling ages for Miocene left-lateral shear along the Xianshuihe fault zone. The results document two thermal events during the sinistral shear. The early event (12.10 Ma) corresponds to rapid cooling of the Zheduoshan granitic massif from above 700℃ to below 350℃. The late event (5-3.5 Ma) corresponds to cooling of granites intruded along the eastern side of the fault zone. These dating results provide important thermochronological constraint on the timing of late Cenozoic eastward extrusion of the Chuan-Dian Block in the SE Tibetan margin.

关键词： Xianshuihe fault zone, Zheduoshan granitic massif, sinistral shear deformation, 40Ar/39Ar dating, late Cenozoic.

Explicit analytical solutions of the anisotropic Brinkman model for the natural convection in porous media(Ⅱ)

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science china(Physics,Mechanics & Astronomy) 2005年第4期48卷 422-430页

作者： CAI Ruixian1, GOU Chenhua1, 2.& ZHANG Na1 1. Institute of Engineering Thermophysics, chinese academy of sciences, Beijing 100080, {2. 2. Graduate School, chinese academy of sciences, Beijing 100080, {2. 1. Institute of Engineering Thermophysics Chinese Academy of Sciences 100080 Beijing China 2. Graduate School Chinese Academy of Sciences 10080 Beijing China

Some algebraically explicit analytical solutions are derived for the anisotropic Brinkman model―an improved Darcy model―describing the natural convection in porous media. Besides their important theoretical meaning (for example, in analyzing the non-Darcy and anisotropic effects on the convection), such analytical solutions can be the benchmark solutions that can promote the development of computational heat and mass transfer. Some solutions considering the anisotropic effect of permeability have been given previously by the authors, and this paper gives solutions including the anisotropic effect of thermal conductivity and the effect of heat sources.

关键词： explicit analytical solution, porous medium, natural convection, Brinkman model, anisotropic.

Comparative analysis of temperature and CO2.fluxes for winter wheat in Tibetan Plain and North china Plain using the EMD method

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Progress in Natural science:Materials International 2006年第10期16卷 1066-1071页

作者： JIANG Zhaoyang, YU Qiang, LEI Shuhe, WANG Tianduo, SUN Xiaomin and ZHANG Renhua ( chinese academy of Meteorological {{2., Beijing 100081, china Institute of Geographic {{2.s and Natural Resources Research, chinese academy of sciences, Beijing 100101, china Mathematics Department, Ocean University of china, Qingdao {2.6071, china shanghai Institute of Plant Physiology and Ecology, chinese academy of sciences, shanghai {2.003{2. china) [a]chinese academy of Meteorological {{2. Beijing China [b]chinese academy of {{2.s Institute of Geographic sciences and Natural Resources Research Beijing China [c]Mathematics Department Ocean University of China Qingdao China [d]chinese academy of {{2.s Shanghai Institute of Plant Physiology and Ecology Shanghai China

Comparative study of spectral properties of temperature and CO2.fluxes measured by eddy covariance method at Yucheng (36°57'N, 116°36'E, 2. m a.s.l., in the North {2. Plain) and at Lhasa (2.°41'N, 91°2.'E, 3688 m a.s. 1., on the Tibetan Plateau) is described using the empirical mode decomposition (EMD) method. The main results are: (1) The intrinsic oscillation modes or intrinsic mode functions (IMFs) were extracted from data of temperature ( T) and CO2.fluxes (F) measured at Yucheng ( T1 and F1) and Lhasa ( T2.and F2. . (2. Hilbert transform was applied to these IMF components, then the Hubert-Huang spectra and the marginal spectra of these data were obtained. (3) Comparison of temperature and CO2.fluxes in North {2. Plain and on Tibetan Plain illustrated that the characteristic frequencies corresponding to T1, F1, T2.and F2.are 0.05 Hz, 0.03 Hz, 0.014 Hz and 0.005 Hz, respectively.

关键词： empirical mode decomposition (EMD) intrinsic mode function (IMF) flux Hilbert transform wheat Tibet.

Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent

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science china Chemistry 2006年第4期49卷 363-370页

作者： LI Xiaobin1,2. CAO Hongbin1 & ZHANG Yi1 1. Institute of Process Engineering, chinese academy of sciences, Beijing 100080, {2. 2. Graduate School of the chinese academy of sciences, Beijing 100039, {2. 1. Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China 2. Graduate School of the chinese academy of sciences Beijing 100039 China

Rigid polyurethane foams blown by varying water level were prepared in this study. The structures and physical properties of rigid polyurethane foams blown by water were measured with FT-IR, universal testing machine (Instron3365), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that polyurea and polybiuret were the typical charac- teristics, and the cream time and gel time were shorter for the fully water blown rigid foams than that for the fully cyclopentane blown foams. The density of foam samples decreased from 45.0 kg/m3 to 2..4 kg/m3 with the increase of water level from 3 pph to 7 pph. Compressive strength exhibited the similar behavior with density. The average cell size of foam samples ranged from 2.1 μm to 356 μm with the increase of water level from 3 pph to 7 pph, respectively. At the same time, poorer dimen- sional stability was encountered with the increase of average cell size due to fast diffusion rate of CO2.out of the foam. The results of thermal analysis show that the glass transition temperature (Tg) shifted to a higher temperature with the increase of isocyanate level when more water was used as chemical blowing agent.

关键词： polyether polyol, polyurethane rigid foam, compressive strength, dimensional stability, cell size, glass transition temperature.

Single crystal β-Ga_2._3: Cr grown by floating zone technique and its optical properties

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science china(Technological sciences) 2007年第1期50卷 51-56页

作者： ZHANG JunGang1, 2. LI Bin3, XIA ChangTai1, XU Jun1, DENG Qun4, XU XiaoDong1, WU Feng1, XU WuSheng4, SHI HongSheng4, PEI GuangQing1, 2.& WU YongQing1,2.1 shanghai Institute of Optics and Fine Mechanics, chinese academy of sciences, shanghai 2.1800, china 2.Graduate School of the chinese academy of sciences, Beijing 100039, china 3 shanghai Institute of Applied Physics, chinese academy of sciences, shanghai 2.1800, china 4 GE (china) Research and Development Center Co. Ltd., shanghai 2.12.3, china 1. shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China 2. Graduate School of the chinese academy of sciences Beijing 100039 China 3. shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China 4. GE (china) Research and Development Center Co. Ltd. Shanghai 201203 China

β-Ga2.3: Cr single crystals were grown by floating zone technique. Absorption spectra and fluorescence spectra were measured at room temperature. The values of field splitting parameter Dq and Racah parameter B were obtained by the peak values of absorption spectra. The value 10Dq/B=2..14 manifests that in β-Ga2.3 crystals Cr3+ ions are influenced by low energy crystal field. After high temperature annealing in air, the Cr3+ intrinsic emission was enhanced and the green lumines-cence disappeared. The strong and broad 691 nm emission was obtained at 42. nm excitation due to the electron transition occurred from 4T2.to 4A2. The studies manifest that the β-Ga2.3 crystals have the potential application for tunable laser.

关键词： β-Ga2.3: Cr single crystals floating zone technique tunable laser spectrum.

An H_2. flare in GGD2.

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chinese science Bulletin 2001年第1期46卷 35-39页

作者： XU Ye, ZHENG Xingwu JIANG Dongrong, ZHANG Fujun& YU Zhiyao1. shanghai Astronomical Observatory, chinese academy of sciences, shanghai 2.0030, china 2. chinese National Observatories, chinese academy of sciences, Beijing 100080, china 3. Department of Astronomy, Nanjing University, Nanjing 2.0093, china shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai China chinese National Observatories Chinese Academy of Sciences Beijing China Department of Astronomy Nanjing University 210093 China

We report the observing results of a short time scale monitoring of the 2. GHz water maser emission in GGD2.. A rapid water maser outburst with the time scales of 4 d has been detected, and the variations are accompanied by some changes in the line width. The time variations were probably caused by a collision pump which led to changes in the pump input.

关键词： interstellar masers (ISM) individual GGD2. masers.

Study on growth and properties of novel γ-LiAlO_2.substrate

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science china(Technological sciences) 2006年第2期49卷 188-193页

作者： ZOU Jun1,2. ZHOU Shengming1, XU Jun1 & ZHANG Rong3 1. shanghai Institute of Optics and Fine Mechanics,{2.s, shanghai 2.1800, china 2. Graduate School of{2.s, Beijing 100039, china 3. Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 2.0093, china 1. shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China 2. Graduate School of chinese academy of sciences Beijing 100039 China 3. Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China

Transparent γ-LiAlO2.single crystal has been grown by Temperature Gradient technique. The surface of the wafer annealed in O2.atmosphere at 1100°C for 70 h became opaque and Li-poor phase (LiAl5O8); while, that annealed in Li-rich atmosphere kept transparent and smooth. The full-width at half maximum value dropped to 30 arcsecs when the wafer was annealed in Li-rich atmosphere. That annealed in O2.atmosphere increased to 78 arcsec. Compared with absorption spectra, we can conclude that the 196 nm absorption peak was caused by Li vacancies and the 736 nm peak was caused by O vacancies.

关键词： γ-LiAlO2 crystal, scanning electron micrograph (SEM), absorption spectra.

The use of laser ranging to measure space debris

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Research in Astronomy and Astrophysics 2012年第2期12卷 212-218页

作者： Zhong-Ping Zhang 1,2.Fu-Min Yang 1,Hai-Feng Zhang 1,Zhi-Bo Wu 1,2.Ju-Ping Chen 1,2.Pu Li 1 and Wen-Dong Meng 1 1 shanghai Astronomical Observatory,chinese {2. of sciences,shanghai 2.0030,china 2.Key Laboratory of Space Object and Debris Observation,chinese {2. of science,Nanjing 2.0008,china shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China Key Laboratory of Space Object and Debris Observation Chinese Academy of Science Nanjing 210008 China

Space debris is a major problem for all the nations that are currently active in space. Adopting high-precision measuring techniques will help produce a reliable and accurate catalog for space debris and collision avoidance. Laser ranging is a kind of real-time measuring technology with high precision for space debris observation. The first space-debris laser-ranging experiment in china was performed at the shanghai Observatory in July {2.08 with a ranging precision of about 60-80 cm. The experi- mental results showed that the return signals from the targets with a range of 900 km were quite strong, with a power of 40W （{2. at {2. Hz） using a 10ns pulse width laser at 53{2.nm wavelength. The performance of the preliminary laser ranging system and the observed results in {2.08 and {2.10 are also introduced.

关键词： astrometry - catalogs - space debris - laser ranging - observation

Meet Our New Editorial Board Members of Rising Stars

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chinese Journal of Chemistry 2024年第16期42卷 1797-1805页

作者： Editorial Office of chinese Journal of Chemistry 不详

Editorial Board Memberof Rising Stars:Xiulin Fan,Professor,School of Materials science and Engineering Zhejiang University,Hangzhou,***:2.03-2.07,*** University,china.2.07-2.12.*** University,china(Supervisor:*** Chen).

关键词： china. Editorial Hangzhou

Progress in the detection of human genome structural variations

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science china(Life sciences) 2009年第6期52卷 560-567页

作者： WU XueMei1,3 & XIAO HuaSheng1,2.1 Center of Functional Genomics,Key Laboratory of System Biology,shanghai Institutes for Biological {2.s,{2. academy of {2.s,shanghai 2.0031,china 2.National Engineering Center for Biochip at shanghai,shanghai 2.12.3,china 3 Graduate School of the chinese academy of sciences,shanghai 2.0031,china 1. Center of Functional Genomics Key Laboratory of System Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 3. Graduate School of the chinese academy of sciences Shanghai 200031 China 2. National Engineering Center for Biochip at shanghai Shanghai 201203 China

The emerging of high-throughput and high-resolution genomic technologies led to the detection of submicroscopic variants ranging from 1 kb to 3 Mb in the human *** variants include copy number variations(CNVs),inversions,insertions,deletions and other complex rearrangements of DNA *** paper briefly reviews the commonly used technologies to discover both genomic structural variants and their potential ***,we highlight the array-based,PCR-based and sequencing-based assays,including array-based comparative genomic hybridization(aCGH),representational oligonucleotide microarray analysis(ROMA),multiplex amplifiable probe hybridization(MAPH),multiplex ligation-dependent probe amplification(MLPA),paired-end mapping(PEM),and next-generation DNA sequencing ***,we discuss the limitations and challenges of current assays and give advices on how to make the database of genomic variations more reliable.

关键词： structural variation cytogenetic microarray PCR paired end mapping(PEM) next-generation sequencing