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The global image of the Moon obtained by the Chang'E-1:Data processing and lunar cartography

Science China Earth Sciences 2010年第8期53卷 1091-1102页

作者： LI ChunLai1, LIU JianJun1, REN Xin1, MOU LingLi1, ZOU YongLiao1, ZHANG HongBo1, Lü Chang1, LIU JianZhong1, ZUO Wei1, SU Yan1, WEN WeiBin1, BIAN Wei1, ZHAO BaoChang2, YANG JianFeng2, ZOU XiaoDuan1, WANG Min1, XU Chun1, KONG DeQing1, WANG XiaoQian1, WANG Fang1, GENG Liang1, ZHANG ZhouBin1, ZHENG Lei1, ZHU XinYing1, LI JunDuo1 & OUYANG ZiYuan11 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2 Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China National Astronomical Observatories Chinese Academy of Sciences Beijing China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an China

The global lunar image of the first phase of Chinese Lunar Exploration Program is the first image that covered all over the surface of the Moon. It will serve as a critical foundation for succeeding exploration and scientific research. In this paper, the acquisition, characteristics, and data quality of Chang'E-1 CCD image data are described in detail. Also described are the methodology and procedure of data processing. According to rule of planetary cartography, the image data have been processed, geometrically corrected, and then mosaicked and merged in a scale of 1:2.5 million. The results of data processing and charting show that the image data of Chang'E-1 CCD and their geometric precision meet the demand of charting a map in the scale of 1:2.5 million. The relative geometric positioning precision of the global image is better than 240 m, and the absolute geometric positioning precision is slightly better than that of the ULCN2005 and Clementine lunar basemap (V2.0). The plane positioning precision is approximately 100-1500 m. This global image proves to be the best global image of the Moon so far in terms of space coverage, image quality, and positioning precision.

关键词： Chang’E-1 lunar CCD data processing lunar image position lunar global image

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Anachronistic facies in the Lower Triassic of South China and their implications to the ecosystems during the recovery time

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Science China Earth Sciences 2008年第11期51卷 1646-1657页

作者： XiaoMing Zhao (1) (2) JinNan Tong (1) HuaZhou Yao (2) KeXin Zhang (1) Chen Zq (3) School of Earth and Geographical Sciences the University of Western Australia Crawley WA6009 Australia

The end-Permian mass extinction not only severely distressed the Paleozoic ecosystems but also dramatically changed the sedimentary systems, resulting in a peculiar Early Triassic ecosystem and submarine environment during the recovery time following the mass extinction. The Lower Triassic is characteristic of the wide occurrence of various distinctive sediments and related sedimentary structures, such as flatpebble conglomerates, vermicular limestone, subtidal wrinkle structures, microbialite, carbonate seafloor fans, thin-bedded limestone and zebra limestone-mudstone. These sediments were common in the Precambrian to Early Ordovician marine settings, and then they occurred only in some extreme and unusual environments with the expansion of metazoan faunas. However, the Early Triassic witnessed an "anachronistic" reappearance of some distinctive sedimentary records in normal shallow marine settings. The study of these anachronistic facies should be of great importance for the understanding of the unique ecosystem and marine environment through the great Paleozoic-Mesozoic transition. The anachronistic facies characterized by vermicular limestone have been documented in many localities in South China and occur at various horizons of the Lower Triassic. Most types of re- ported distinctive sediments over the world have been observed in the Lower Triassic of South China. This provides an excellent opportunity for understanding the Early Triassic environment and its co- evolution with the biotic recovery. Among the anachronistic facies the vermicular limestone is the most characteristic and common distinctive sediments in the Lower Triassic of South China but has received relatively few investigations. Taking it as a case study, we will detail the variation of vermicular limestone and its stratigraphic distribution in the Three Gorges area, Hubei Province. The investigation on the vermicular limestone and other distinctive sediments from the Lower Triassic of South Chi

关键词： Early Triassic anachronistic facies biotic recovery ecosystem Three Gorges area South China

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Alpha-latrotoxin Triggers Extracellular Ca2+-dependent Exocytosis and Sensitizes Fusion Machinery in Endocrine Cells

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Acta Biochimica et Biophysica Sinica 2006年第1期38卷 8-14页

作者： Zhi-Tao HU~(1#),Ping ZHAO~(1#),Jie LIU~(1#),Zheng-Xing WU~(1*),and Tao XU~(1,2*) ~1 School of Life Science and Technology,Huazhong University of Science and Technology,Wuhan 430074,China ~2 National Laboratory of Biomacromolecules,Institute of Biophysics,Chinese Academy of Sciences,Beijing 100101,China School of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

α-Latrotoxin from the venom of black widow spider induces and augments neurotransmitterand hormone release by way of extracellular Ca2+influx and cellular signal transduction *** usingwhole cell current and capacitance recording,the photolysis of card Ca2+,and Ca2+microfluorometry andamperometry,we investigated the stimulating effect and mechá（?）ism of α-latrotoxin on exocytosis in ratpancreatic β cells,LβT2 cells and latrophilin plasmid-transfected INS-1 *** data indicated that:（1）α-latrotoxin increased cytosolic Ca2+concentration through the formation of cation-permitting pores and sub-sequent Ca2+influx with the presence of extracellular Ca2+;（2）α-latrotoxin stimulated exocytosis in normalbath solution and its stimulating effect on secretion was eradicated in Ca2+-free bath solution; and （3）α-latrotoxin sensitized the molecular machinery of fusion through activation of protein kinase C and increasedthe response of cells to Ca2+photolysed by a flash of ultraviolet *** summary,α-latrotoxin inducedexocytosis by way of Ca2+influx and accelerated vesicle fusion by the sensitization of fusion machinery.

关键词： α-latrotoxin exocytosis calcium Ca2+-sensitivity of fusion protein kinase C(PKC) capacitance measurement amperometry

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Identification of Genes Related to Nasopharyngeal Carcinoma with the Help of Pathway-based Networks

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Acta Biochimica et Biophysica Sinica 2006年第12期38卷 900-910页

作者： Hui LI~1 Cai-Ping REN~1* Xiao-Jun TAN~2 Xu-Yu YANG~1 Hong-Bo ZHANG~1 Wen ZHOU~1 Kai-Tai YAO~1 1 Cancer Research Institute,Xiangya School of Medicine,Central South University,Changsha 410078,China 2 Reproductive and Stem Cell Engineering Institute,Xiangya School of Medicine,Central South University,Changsha 410078,China Cancer Research Institute Xiangya School of Medicine Central South UniversityChangsha 410078 China Reproductive and Stem Cell Engineering Institute Xiangya School of Medicine Central South UniversityChangsha 410078 China

cDNA microarray is a powerful tool to analyze simultaneously the expression levels of tens ofthousands of *** with normal nasopharynx (NP) tissues,2210 genes were highly differentiallyexpressed in nasopharyngeal carcinoma (NPC) tissues detected by cDNA *** signal pathwayis widely used to describe the complex relationship between genes,a pathway-based network was con-structed to visualize the connection between the genes obtained from microarray data in this *** the targeted genes that may have more important influence on this gene network with statisticalmethods and found that some genes might have significant influence on this network,especially Ras-relatednuclear protein (RAN),carboxyl ester lipase (CEL),v-rel reticuloendotheliosis viral oncogene homolog A(RELA) *** verify the results from pathway-based selection,reverse transcription-polymerase chainreaction (RT-PCR) and real-time RT-PCR were performed to detect the expression levels of RAN,CEL andRELA genes and it was found that the RAN and CEL genes were significantly up-regulated in more than 80%of NPC *** further elucidate the function of the RAN gene,RAN expression was specifically sup-pressed in a 5-8F NPC cell line by RNA interference (RNAi).As expected,the depletion of RAN couldeffectively block the proliferation of tumor ***,our study may open up a new way to analyze thevast microarray data.

关键词： nasopharyngeal carcinoma microarray real-time PCR RNA interference Ras-related nuclear protein (RAN)

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Quantitative Determination of Cucumber Mosaic Virus Genome RNAs in Virions by Real-Time Reverse Transcription-Polymerase Chain Reaction

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Acta Biochimica et Biophysica Sinica 2006年第10期38卷 669-676页

作者： Jun-Li FENG~1 Shao-Ning CHEN~1 Xiang-Shan TANG~1 Xian-Feng DING~1 Zhi-You DU~2 Ji-Shuang CHEN~(1,2*) 1 Institute of Bioengineering,Zhejiang Sci-Tech University,Hangzhou 310018,China 2 College of Life Sciences,Zhejiang University,Hangzhou 310029,China Institute of Bioengineering Zhejiang Sci-Tech UniversityHangzhou 310018 China College of Life Sciences Zhejiang UniversityHangzhou 310029 China

A real-time RT-PCR procedure using the green fluorescent dye SYBR Green Ⅰ was developedfor determining the absolute and relative copies of cucumber mosaic virus （CMV） genomic RNAs containedin purified *** specific to each CMV ORF were designed and *** were thenamplified with length varying from 61 to 153 *** dilution series of CMV genome RNAs prepared by invitro transcription as the standard samples,a good linear correlation was observed between their thresholdcycle （C_t） values and the logarithms of the initial template *** copies of genomic RNA 1,RNA 2,RNA 3 and the subgenomic RNA 4 in CMV virions were quantified by this method,and the ratios were about1.00:1.17:3.58:*** results were confirmed by Lab-on-a-Chip and Northern blot hybridization *** work is the first report concerning the relative amounts of different RNA fragments in CMV virions asa virus with tripartite genome.

关键词： real-time reverse transcription-polymerase chain reaction cucumber mosaic virus genomic RNA quantitative determination

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Droplet creator based on electrowetting-on-dielectric for lab on a chip

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Science China(Technological Sciences) 2006年第2期49卷 248-256页

作者： ZENG Xuefeng1, YUE Ruifeng1, WU Jiangang1, HU Huan1, DONG Liang1, WANG Zheyao1, HE Feng2 & LIU Litian1 1. Institute of Microelectronics, Tsinghua University, Beijing 100084, China 2. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China Institute of Microelectronics Tsinghua University Beijing China Department of Engineering Mechanics Tsinghua University Beijing China

Electrowetting-on-dielectric (EWOD) is to directly control the wettability of liquids on the solid surface by applying the electric potential to the microelectrode array under the dielectric layer. The prototype of the EWOD droplet creator with the sandwiched structure is used: the droplet is sandwiched between the top and bottom plates; the bot- tom plate consists of silicon used as the substrate of the microelectrode array, nitride sili- con film deposited by low pressure chemical vapor deposition as the dielectric layer and the fluorocarbon polymer film deposited by inductively coupled plasma chemical vapor deposition as the hydrophobic layer; and the top plate is the transparent electrode covered with the hydrophobic layer. To obtain the required minimum voltage, the process and the criterion of creating droplets are analyzed. At the voltage of 35 V the deionized water droplet surrounded in silicone oil is successfully created.

关键词： micro total analysis system, electrowetting-on-dielectric, creation and control of droplets, inductively coupled plasma chemical vapor deposition.

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Model calculating annual mean atmospheric dispersion factor for coastal site of nuclear power plant

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Journal of Environmental Sciences 2001年第3期13卷 280-290页

作者： HU Er bang 1, CHEN Jia yi 2, YAO Ren tai 1, ZHANG Mao shuan 1, GAO Zhan rong 1, WANG Shu xian 1, JIA Pei rong 3, Liao Qi lin 4(1 China Institute for Radiation Protection, Taiyuan 030006,China. 2 Beijing University, Beijing\ 100871 China Institute for Radiation Protection Taiyuan 030006 China. E-mail:[email protected]public ty. sx. cn Beijing University Beijing 100871 China The Second Research and Design Institute of Nuclear Industry Beijing 100037 China Fujina Nuclear Power Office Fuzhou China

This paper describes an atmospheric dispersion field experiment performed on the coastal site of nuclear power plant in the east part of China during 1995 to 1996. The three-dimension joint frequency are obtained by hourly observation of wind and temperature on a 100m high lower; the frequency of the 'event day of land and sea breeze' are given by observation of surface wind and land and sea breezes; the diffusion parameters are got from measurements of turbulent and wind tunnel simulation test. A new model calculating the annual mean atmospheric dispersion factor for coastal site of nuclear power plant is developed and established. This model considers not only the effect from mixing release and mixed layer but also the effect from the internal boundary layer and variation of diffusion parameters due to the distance from coast. The comparison between results obtained by the new model and current model shows that the ratio of annual mean atmospheric dispersion factor gained by the new model and the current one is about 2.0.

关键词： Coastal zones Diffusion Dispersions Earth atmosphere Temperature Wind

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Entropy majorization, thermal adiabatic theorem, and quantum phase transitions

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Frontiers of physics 2012年第2期7卷 244-251页

作者： Shi-jian Gu (1) 1. Department of Physics and Institute of Theoretical Physics The Chinese University of Hong Kong Hong Kong China

Let a general quantum many-body system at a low temperature adiabatically cross through the vicinity of the system＇s quantum critical point. We show that the system＇s temperature is signif- icantly suppressed due to both the entropy majorization theorem in quantum information science and the entropy conservation law in reversible adiabatic processes. We take the one-dimensional transverse-field Ising model and the spinless fermion system as concrete examples to show that the inverse temperature might become divergent around the systems＇ critical points. Since the temper- ature is a measurable quantity in experiments, it can be used, via reversible adiabatic processes at low temperatures, to detect quantum phase transitions in the perspectives of quantum information science and quantum statistical mechanics.

关键词： quantum phase transition entropy majorization

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Influence of permeability on hydrothermal circulation in the sediment-buried oceanic crust

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Science China Earth Sciences 2006年第7期49卷 773-784页

作者： WANG Xingtao1,2, ZHAI Shikui1, MENG Fanshun1, LI Huaiming1, YU Zenghui1, SUN Ge1 & XUE Gang1 1 Marine Geoscience Institute, Ocean University of China, Qingdao 266003, China 2 Bureau of Ocean and Fishery, Weihai 264200, China Marine Geoscience Institute Ocean University of China Qingdao China Bureau of Ocean and Fishery Weihai China

Hydrothermal convection in the upper oceanic crust has been inferred to be a common and important process. Under the simplified conditions of planar boundaries, permeability provides a strong constraint on the pattern of circulation, the dimensions of convective cells and flow field of hydrothermal circulation. By applying an advanced numerical modeling method, to our knowledge, it is the first time to investigate convection as it is influenced by different strata permeability structures, formational anisotropy, fracture zone and cooling intrusion. The simplified geological model is com-posed of 3 layers, sedimentary layer, high permeable basement layer and low permeable basement layer from top to bottom. When permeability in high permeable layer is 10 times larger than that in sedimentary layer, convection occurs in high permeable layer. The pattern of hydrothermal circulation and flow velocity of hydrothermal fluid are strongly influenced by strata permeability structures, changes of permeability in high permeable basement layer, fracture zone and cooling intrusion. However, formational anisotropy relatively exerts weak influence on hydrothermal circulation, with the ratio up to 1.5 of vertical permeability to lateral permeability in high permeable layer. Fracture zone existing in basement is the most important factor affecting the circulation field. The effects of a local intrusion are limited to convection intensity above the intrusion and have little impact on the fluid flow on a regional scale. As the result of numerical modelling, key factors affecting the hydrothermal cir-culation are good permeable zone and long-term heat source, not including fluid source.

关键词： hydrothermal circulation, permeability, oceanic crust, numerical model.

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A HIGHER-ORDER EULERIAN-LAGRANGIAN LOCALIZED ADJOINT METHOD FOR TWO-DIMENSIONAL UNSTEADY ADVECTION-DIFFUSION PROBLEMS

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Journal of Computational Mathematics 2012年第3期30卷 324-336页

作者： Mohamed A1-Lawatia Department of Mathematics and Statistics Sultan Qaboos University P.O. Box 36 Al-Khod 123 Sultanate of Oman

We present a higher-order in-space characteristic method for the solution of the tran- sient advection diffusion equations in two space dimensions. This method uses biquadratic trial and test functions within the framework of the Eulerian-Lagrangian localized Adjoint Methods （ELLAM）. It therefore maintains the advantages of previous ELLAM schemes. Namely, it treats general boundary conditions naturally in a systematic manner, conserves mass, and symmetrizes the governing transport equations. Moreover, it generates accurate numerical solutions even if large time steps are used in the simulation. Numerical exper- iments are presented to illustrate the performance of this method and establish its order of convergence numerically.

关键词： Advection-diffusion equations Characteristic methods Eulerian-Lagrangianmethods Biquaclratic interpolation.

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