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Numerical simulation of topography effects on the “00.7” severe rainfall in Beijing

Progress in Natural Science:Materials International 2005年第9期15卷 818-826页

作者： ZHANG chaolin1.*, JI chongping1. KUO Yinghwa2, FAN Shuiyong1. XUAN chunyi3.and cHEN Min1.1. institute of Urban Meteorology, china Meteorological Administration, Beijing 1.0089, china 2. Mesoscale and Microscale Meteorology Division, National center for Atmospheric Research, Boulder, cO 803.7-3.00, USA 3. Beijing Meteorological Bureau, Beijing 1.0089, china) institute of Urban Meteorology China Meteorological Administration Beijing 100089 China. Mesoscale and Microscale Meteorology Division National Center for Atmospheric Research Boulder CO 80307-3000 USA. Beijing Meteorological Bureau Beijing 100089 China

In an effort to study the severe rainfall event of 4—5th July 2000 in Beijing (with 24h accumulated precipitation of 240 mm), we perform numerical simulations to investigate this event using the MM5v3.6 model. The model is initialized with the MM5/WRF 3.VAR analysis, which incorporates the ground-based GPS precipitable water vapor, automatic and conventional meteorological observations in its assimilation step. For 24 h accumulated precipitation forecast, the threat scores are 0.72, 0.76, 0.67 and 0.63. for thresholds of 1. 5, 1., and 20 mm, respectively. Holding other factors unchanged, sensitivity experiments were conducted with different topographic resolutions of 1.0, 50 and 3.7 km to investigate the topographic effects on precipitation over the Beijing area. In these sensitivity experiments, we attempt to preserve the realistic orographic distribution in the model topography under the condition of keeping the dynamic-thermodynamic consistency of the initial model atmosphere to the extent possible. Results indicate that the unique topographic distribution and variations in the Beijing area play an important role in determining the location, distribution and intensity of heavy precipitation.

关键词： topography heavy rainfall 3.VAR ground-based GPS numerical simulation.

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cO observations of massive star forming regions at different evolutionary phases

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Science china(Physics,Mechanics & Astronomy) 2006年第5期49卷 626-640页

作者： cHEN Xi1.2, XU Ye1.3. SHEN Zhiqiang1.3.& LI Jingjing1.2 1. Shanghai Astronomical Observatory, chinese Academy of Sciences, Shanghai 20003., china 2. Graduate School of the chinese Academy of Sciences, Beijing 1.003., china 3. Joint institute for Galaxy and cosmology, Shanghai Astronomical Observatory and the University of Science and Technology of china, Shanghai 20003., china Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China Graduate School of the chinese Academy of Sciences Beijing 100034 China Joint institute for Galaxy cosmology Shanghai Astronomical Observatory the University of Science Technology of china Shanghai 200030 China

The 1.cO (J=1.0), 1.0}O (J=1.0) and{1.1.O (J=1.0) emissions in 9 massive star forming regions, which are believed to be at different stages of massive star formation, were mapped with the 1.0}7 m millimeter wave telescope at Qinghai Station of Purple Mountain Observatory. Of the observed 9 sources, 1.0}O{1.ores were detected in seven of them, and{1.1.O{1.ores in five of them. And only two sources associated with{1.1.O{1.ores and H2O masers showed the extended structures and strong outflows. This is the first detection of outflow associated with IRAS 22566+5828 in the observing field of S1.2/S1.3. The physical parameters of{1.ores and outflows for these sources, derived from Local Thermal Equilibrium (LTE) analysis, are presented. These observing results suggest that the{1.1.O{1.ores will only appear when the gas density is high enough and the probability to have an outflow is very high when the{1.lumps show the{1.1.O and H2O maser simulta- neously.

关键词： star formation cloud core outflow H2O maser

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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 {1. of Optics and Fine Mechanics, chinese Academy of Sciences, Shanghai 201.00, china 2. Graduate School of chinese Academy of Sciences, Beijing 1.003., china 3. Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 21.093. 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 1.00°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 {1. 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 1.6 nm absorption peak was caused by Li vacancies and the 7{1. nm peak was caused by O vacancies.

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

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U-Pb dating of zircon from the bed parallel anatectic granitic intrusion in the Baoban group in Hainan Island and the tectonic implication

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Science china Earth Sciences 2005年第12期48卷 2092-2103页

作者： DING Shijiang1. HU Jianmin2, SONG Biao3.4,{1.HEN Mulun1. XIE Shengzhou1.& FAN Yuan1.1. Geological Surveying institute of Hainan, Haikou 570206,{1.hina 2. institute of Geomechanics,{1.hinese Academy of Geological Sciences, Beijing 1.0081.{1.hina 3. Beijing{1.enter of SHRIMP, Beijing 1.003.,{1.hina 4. institute of Geology,{1.hinese Academy of Geological Sciences, Beijing 1.003.,{1.hina 1. Geological Surveying institute of Hainan 570206 Haikou China 2. institute of Geomechanics Chinese Academy of Geological Sciences 100081 Beijing China 3. Beijing{1.enter of SHRIMP 100037 Beijing China 4. institute of Geology Chinese Academy of Geological Sciences 100037 Beijing China

The petrological and geochemical features of the bed parallel granitic intrusion in the Pre-cambrian Baoban group in Hainan Island attest to the anatexis origin of the granites. U-Pb dating analyses of zircons from the anatectic granite and the biotite two-feldspar gneiss in the Baoban group, using SHRIMP II in the Beijing Ion-probe center, acquire 206Pb/2{1.U ages of {1.8±{1.5 Ma (of granite, 95% confidence level, MSDW=1.2{1. and {1.2.9±6.1.Ma (of gneiss, 95% confidence level, MSDW = 2.04) respectively. The two late Devonian ages indicate consistently a tectonic- thermal event experienced in Hainan Island, and are the first discovered record of the Devonian geological process in the district. This event possibly resulted from the deep ther-mal-dynamic process when the Gondwana continent began to break up in the Devonian period.

关键词： Hainan Island, Devonian period, anatectic granite, zircon SHRIMP U-Pb dating.

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Effects of binders on the performance of electric double-layer capacitors of carbon nanotube electrodes

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Progress in Natural Science:Materials International 2005年第5期15卷 453-457页

作者： LI chensha1.*, WANG Dazhi1. ZHANG Baoyou2, WANG Xiaofeng1. cAO Maosheng3. and LIANG Ji1.1. Department of Mechanical Engineering, Tsinghua University, Beijing 1.0084, china 2. center for Analysis and Measurement, Harbin institute of Technology, Harbin 1.0001. china 3. School of Material Science and Engineering, Tsinghua University, Beijing 1.0084, china) Department of Mechanical Engineering Tsinghua University Beijing 100084 China center for Analysis and Measurement Harbin Institute of Technology Harbin 150001 China School of Material Science and Engineering Tsinghua University Beijing 100084 China

Polarizable electrodes of electric double layer capacitor (EDLcs) were made from carbon nanotubes. Effects of different binders, which are phenolic resin (PF) and polytetrafluoroethylene (PTFE), on the properties of polarizable electrodes are studied. Results indicate that the microstructure, pore size distribution and specific capacitance of the electrodes with PTFE binder are superior to those electrodes with PF binder after carbonization. The suitable binder (PTFE) for carbon nanotubes electrodes is proposed.

关键词： carbon nanotubes electric double-layer capacitors phenolic resin polytetrafluoroethylene.

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Progress and review of the studies on the end-Triassic mass extinction event

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Science china Earth Sciences 2005年第12期48卷 2049-2060页

作者： DENG Shenghui1.2, LU Yuanzheng1.2,3.& XU Daoyi4 1. Research {1. of Petroleum Exploration and Development, Beijing 1.0083. china 2. Key Laboratory of Oil and Gas Reservoir of Petrochina, Beijing 1.0083. china 3. china University of Geosciences, Beijing 1.0083. china 4. {1. of Geology, china Earthquake Administration, Beijing 1.0029, china 1. Research institute of Petroleum Exploration and Development 100083 Beijing China 2. Key Laboratory of Oil and Gas Reservoir of Petrochina 100083 Beijing China 3.{1.hina University of Geosciences 100083 Beijing China 4. institute of Geology China Earthquake Administration 100029 Beijing China

The mass extinction at the end-Triassic is one of the five biggest in the Phanerozoic. However,it is the least well understood among these five events, and only till last decade it became a great academic interesting subject to geologists. The evidences for this event come obviously from bivalves, brachiopods, ammonites, corals, radiolaria, ostracods and foraminifera of marine habitats, and plants and tetrapods of terrestrial realm. By contrast, for some of other groups, such as marine gastropods and marine vertebrates, no mass extinction has been recog-nized yet. The extinction event is strongly marked at specific level but shown a complicated situa-tion at generic and family levels. Dramatic changing of the environment, such as the temperature raise due to the greenhouse effect, the marine anoxic habitats caused by a sudden transgression after the regression at the end of Triassic, has been claimed to be the main cause of the extinction. Many hypotheses have been suggested to demonstrate the mechanisms of the environment changing, among which two popular ones are the bolide impact and volcanic eruption. The Triassic-Jurassic (Tr-J) boundary mass extinction event is still poorly understood because no enough data have been obtained from the Tr-J boundary successional sections of both marine and terrestrial sediments, and most of these studies were regionally restricted. The basic aspects of the event and its associated environmental conditions remain poorly characterized and the causal mechanism or mechanisms are equivocal. Some authors even doubt its occurrence. china has many successionally developed terrestrial and marine Tr-J sections. Detailed studies of these sections may be important and significant for well understanding of the event.

关键词： progress, review, end-Triassic, mass extinction, mechanism, Tr-J boundary.

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construction and application of formal ontology for mine

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中国有色金属学会会刊：英文版 2011年第S3期21卷 577-582页

作者： cHENG Gang 1. 2, ZHANG Yin-ling1. 2, WANG Fei 1.,2, ZHANG Zhen-hui 3. GUO Yu-xiang1. 2 1. Key Laboratory of Mine Spatial Information Technologies of State Bureau of Surveying and Mapping, Henan Polytechnic University, Jiaozuo 454003. china 2. School of Surveying and land Information Engineering, Henan Polytechnic University, Jiaozuo 454003. china 3. Qingdao Branch of Naval Aeronautical Engineering institute, Qingdao 266041. china Henan Polytech Univ Key Lab Mine Spatial Informat Technol State Bur Surveying & Mapping Jiaozuo 454003 Peoples R China Henan Polytech Univ Sch Surveying & Land Informat Engn Jiaozuo 454003 Peoples R China Naval Aeronaut Engn Inst Qingdao Branch Qingdao 266041 Peoples R China

Digital mine is the only way for the development of mining industry in china. Due to lack of appropriate standards and norms, and different awareness in the field of digital mine among academia and industry insiders, the meaning for digital mine is still unclear. Starting from the nature of mining and removing of views of specialized fields, this paper constructs formal ontology for digital mine and proposes the four levels for it. The ontology clarifies the concept world for digital mine, defines the meaning of concepts and relations clearly, provides a reference for the standard construction for digital mine and provides a unified semantic framework for the integration of heterogeneous mine data. Meanwhile, it can provide formal reasoning knowledge for expert system of digital mine and improve the intelligence and automation while the machine automatically interpreting and processing mine spatial data.

关键词： Digital mine formalization ontology concept world semantic share

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Representation of microscale ocean wavenumber spectrum correct to the second order

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Science china Earth Sciences 2005年第4期48卷 549-554页

作者： YUAN Yeli2 & HUA Feng1.2,3.1. {1. of Oceanology, chinese Academy of Sciences, Qingdao 266071. china 2. Key Laboratory of Marine Science and Numerical Modeling, State Oceanic Administration, Qingdao 266061. china 3. Graduate School of the chinese Academy of Sciences, Beijing 1.003., china 1. Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration 266061 Qingdao China 2. institute of Oceanology Chinese Academy of Sciences 266071 Qingdao China 3. Graduate School of the{1.hinese Academy of Sciences 100039 Beijing China

In this paper, the analytical representations of four wave source functions in high-frequency spectrum range are given on the basis of ocean wave theory and dimensional analysis, and the perturbation method is used to solve the governing equations of ocean wave high-frequency spectrum on the basis of the temporally stationary and locally homogeneous scale relations of microscale wave. The microscale ocean wavenumber spectrum correct to the second order has an explicit structure, its first order part represents the equilibrium between dif- ferent source functions, and its second order part represents the contribution of microscale wave propagation.

关键词： temporally stationary and locally homogeneous, source function in high-frequency spectrum range, microscale ocean wavenumber spectrum.

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N_2O emissions from agricultural soils in the North china Plain: the effect of chemical nitrogen fertilizer and organic manure

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Journal of Environmental Sciences 2000年第4期12卷 463-468页

作者： DONG Yun\|she 1.2,3., Dieter Scharffe 2, Manfred Domroes 3. QI Yu chun 1. ZHANG Shen 1.(1. institute of Geographic Sciences and Natural Resources Research, chinese Academy of Sciences, Beijing 1.01.1. china E\|mail: dongys@*** 2. M 中科院地理科学与资源所北京 1 0 0 1 0 Max- Planck-institute of{1.hemistry 德国 Mainz 550 2 0 Mainz University 德国 Mainz 550 99

An enclosed chamber technique was used to measure N 2O emissions from intensively agricultural soils of the North china Plain during the periods of 1.95—1.96 and 1.97—1.98, to reflect distinct components of winter wheat and summer maize growing seasons. The results showed that the continuous application of fertilizer in agricultural soils increased N\-2O emissions by a factor of 24.1.28.1. the calculated annual chemical N fertilizer\|transformed N\-2O\|N emissions was 0.67%. Our results indicated that the application of organic manure also had a significant influence on soil N 2O emissions, which combined with the use of chemical N increased about 20% in a year. It was calculated that there were about 0.1.% N of organic manure transformed as N 2O N. Annual mean N 2O emission from our study area of fertilized soils was estimated to be 57.1.μgN 2O/(m 2·h). A weak correlation was also found between N 2O emissions and soil available nitrogen content NH + 4.

关键词： N_2O emissions the North china Plain agricultural soils chemical nitrogen organic manure

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Detection of water in petroleum inclusions and its implications

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Science Bulletin 2006年第12期51卷 1501-1507页

作者： cAO Jian1. YAO Suping1. HU Wenxuan1. ZHANG Yijie2, WANG Xulong3. ZHANG Yueqian3.& TANG Yong3.1. State Key Laboratory for Mineral Deposit Research, Department of Earth Sciences, Nanjing University, Nanjing 21.093. china 2. Research institute of Exploration and Development, Petrochina, Bei- jing 1.0083. china 3. Research institute of Exploration and Development, Xinjiang Oilfield company, Petrochina, Karamay 83.000, china State Key Laboratory for Mineral Deposit Research Department of Earth Sciences Nanjing University Nanjing 210093 China Research institute of Exploration and Development PetroChina Beijing 100083 China Research institute of Exploration and Development Xinjiang Oilfield Company PetroChina Karamay 834000 China

FTIR spectra of inclusions sampled from fault-zone reservoirs of the northwestern Junggar Basin show that water, with different abundances, does exist in petroleum inclusions. It is thus implied that petroleum inclusions can seldom form without water. Different inclusions hosted in one single grain, and formed in one oil charging phase, have a largely varied ratio of water to oil and slightly changed cH3.cH2 ratio. This likely provides evidence for fault-related episodic migration and accumulation of hydrocarbons.

关键词： water in petroleum inclusions forming mechanism of inclusions episodic migration and accumulation of hydrocarbons FTIR microspectroscopy Junggar Basin.

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