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A new method for constructing total energy conservation algorithms

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Progress in Natural Science:Materials International 2003年第1期13卷 59-62页

作者： ZHAO Ying , JI Zhongzhen, YANG Hongwei and WANG Bin (1. LASG, institute of Atmospheric physics, {2. Academy of {3., Beijing 10002., china 2. institute of Science, PLA University of Science and Technology, Nanjing 2.1101, china) chinese Acad Sci Inst Atmospher Phys LASG Beijing 100029 Peoples R China PLA Univ Sci & Technol Inst Sci Nanjing 211101 Peoples R China

Abstract Based on a basic rule for the research on numerical methods which requires that the properties of the original problemshould be preserved as much as possible under discretization, a new method for constructing total energy conservation algorithms is pre-sented. By this method, all kinds of implicit schemes with energy conservation laws including many classical conservation schemes can beconstructed from a kind of special function. Also, the concrete criterion for judging total energy conservation schemes is given. Numericaltests show that these new schemes are effective.

关键词： total energy conservation difference scheme quasi-antisymmetric operator norm-preserving operator.

X-ray spectra induced in highly charged 40Ar^q+ interacting with Au surface

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Science china(physics,Mechanics & Astronomy) 2006年第2期49卷 203-212页

作者： ZHANG Xiao’an1,2. XIAO Guoqing1, YANG Zhihu1, CHEN Ximeng3. ZHAO Yongtao1, LI Fuli4, ZHANG Yinping1, CUI Ying3. ZHANG Hongqiang3. XU Xu3. SHAO Jianxiong3.& ZHAN Wenlong11. institute of Modern physics, chinese Academy of {3., Lanzhou 73.000, china 2. Department of physics, Xianyang Normal University, Xianyang 712.00, china 3. Department of Modern physics, Lanzhou University, Lanzhou 73.000, china 4. Department of Applied physics, Xi’an Jiaotong University, Xi’an 710049, china institute of Modern physics Chinese Academy of Sciences Lanzhou China Department of physics Xianyang Normal University Xianyang China Department of Modern physics Lanzhou University Lanzhou China Department of Applied physics Xi’an Jiaotong University Xi’an China

By use of optical spectrum technology, the spectra of X-ray induced by highly charged 40Arq+ ions interacting with Au surface have been studied. The results show that the argon Kα X-ray were emitted from the hollow atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar16+ion, with electronic con-figuration 1s2.in its ground state below the solid surface. The yield of the projectile Kα X-ray is related to its initial electronic configuration, and the yield of the target X-ray is related to the projectile kinetic energy.

关键词： highly charged ion hollow multi-electron excitation X- ray.

PIXE and INAA studies on ancient potteries from Guangfulin relics in Shanghai

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Progress in Natural Science:Materials International 2007年第11期17卷 1348-1356页

作者： Lin Jiawei1, Cheng Huansheng1, Zhang Zhengquan1, Zhang Bin1, Feng Songlin2. Song Jian3. Gao Menghe4 and Zhu Dan1(1. Applied Ion Beam physics Laboratory, Key Laboratory of the Ministry of Education, {2. of Modern physics, Fudan University, Shanghai 2.043.,{3. 2. Key Laboratory of Nuclear Analytical Techniques, institute of high energy physics, Beijing 10003.,{3. 3. Shanghai Museum, Shanghai 2.0003.{3. 4. Department of Cultural Heritage and Museology, Fudan University, Shanghai 2.043.,{3.) Applied Ion Beam physics Laboratory Institute of Modern Physics Fudan University Shanghai 200433 China Key Laboratory of Nuclear Analytical Techniques Institute of High Energy Physics Beijing 100039 China Shanghai Museum Shanghai 200003 China Department of Cultural Heritage and Museology Fudan University Shanghai 200433 China

This paper reports the study of ancient potteries unearthed from the Guangfulin site in Shanghai. From the external features of these potteries, archeologists can classify them into two different cultural types: Liangzhu culture (local culture) and a new culture which might be derived elsewhere, but they can not recognize whether they were produced in the same place. Proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA) were used to measure the chemical compositions of the samples and the results were analyzed using multivariate statistics. We found that the two methods can complement each other and their database can be mutually referenced in the study of ancient potteries. Experimental results show that the compositions of the potteries from the two cultural types are different, which means that the materials for ancient potteries of new culture originate from elsewhere. This supports the archaeologists’ speculation that a group of ancient people migrated to Shanghai from some other places 4000 years ago.

关键词： PIXE INAA factor analysis Guangfulin ancient pottery

energy recovery and abatement potential of CO_2.emissions for an integrated iron and steel making enterprise

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Science china(Technological sciences) 2010年第1期53卷 129-133页

作者： LI HongFu1,2.BAO WeiJun3.LI HuiQuan3.& CANG DaQiang1 1 Ecology and Recycling Metallurgy Laboratory,Ministry of Education,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 10083.china 2.Jinan iron & Steel Group Ltd.,Jinan 2.0101,china 3.National Engineering Laboratory for Clean Production Technology of Hydrometallurgy,institute of Process Engineering,{3. Academy of sciences,Beijing 100190,china Ecology and Recycling Metallurgy Laboratory Ministry of Education School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing China Jinan iron & Steel Group Ltd. Jinan China National Engineering Laboratory for Clean Production Technology of Hydrometallurgy Institute of Process Engineering Chinese Academy of Sciences Beijing China

The typical features for an integrated iron & steelmaking industry are high energy consumption and CO2.*** traditional BF-BOF process in an integrated Iron and steelmaking enterprise produces a large amount of residual heat and energy,which has great potential for recovery and abatement potential of CO2.*** this paper,for an integrated Iron & steelmaking enterprise of 10 million tons per year in capacity,the residual heat and energy recovery analysis was *** is indicateded that the residual heat and energy can be recovered as electric power by using present advanced process *** means of the distributed power generation,the residual heat and energy can be recovered,with a power generation capacity of 419.5 kWh per ton steel ***,the abatement potential of CO2.emissions for an integrated iron & steel making enterprise was also evaluated,which indicated that about 3.8.5 kg CO2.could be reduced per ton steel product.

关键词： Iron and Steelmaking enterprise residual heat and energy recovery distributed power generation abatement potential of CO2 emission

Geochemical characteristics of rare earth elements in Wuhan section of the Yangtze River

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Journal of Environmental sciences 1995年第1期7卷 44-51页

作者： Wang Lijun Zhang Shen Zhang Chaosheng(institute of Geography,chinese Academy of {2.,Beijing 100101,{3.)Li Xiuxia(institute of high energy physics,chinese Academy of {2.,Beijing 100080,{3.) Inst of Geog Chinese Academy of Sciences Beijing China China

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关键词： geochemical characteristics rare earth elements Yangtze River

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),{2., Chi-nese Academy of sciences, Beijing 100049,{3. 2. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871,{3. 3. Department of Occupational and Environmental Health sciences, School of Public Health, Peking University, Beijing 100083.{3. 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.

A land surface model incorporated with soil freeze/thaw and its application in GAME/Tibet

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Science china Earth sciences 2006年第12期49卷 1311-1322页

作者： HU Heping1, YE Baisheng2. ZHOU Yuhua3.& TIAN Fuqiang1 1. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, china 2. Cold and Arid Regions Environmental and Engineering Research {2., chinese Academy of {3., Lanzhou 73.000, china 3. Department of Civil Engineering, Massachusetts {2. of Technology, USA Department of Hydraulic Engineering Tsinghua University Beijing China Cold and Arid Regions Environmental and Engineering Research institute Chinese Academy of Sciences Lanzhou China Department of Civil Engineering Massachusetts Institute of Technology USA

Land surface process is of great importance in global climate change, moisture and heat exchange in the interface of the earth and atmosphere, human impacts on the environment and eco- system, etc. Soil freeze/thaw plays an important role in cold land surface processes. In this work the diurnal freeze/thaw effects on energy partition in the context of GAME/Tibet are studied. A sophisti- cated land surface model is developed, the particular aspect of which is its physical consideration of soil freeze/thaw and vapor flux. The simultaneous water and heat transfer soil sub-model not only reflects the water flow from unfrozen zone to frozen fringe in freezing/thawing soil, but also demon- strates the change of moisture and temperature field induced by vapor flux from high temperature zone to low temperature zone, which makes the model applicable for various circumstances. The modified Picard numerical method is employed to help with the water balance and convergence of the numerical scheme. Finally, the model is applied to analyze the diurnal energy and water cycle char- acteristics over the Tibetan Plateau using the Game/Tibet datasets observed in May and July of 1998. Heat and energy transfer simulation shows that: (i) There exists a negative feedback mechanism between soil freeze/thaw and soil temperature/ground heat flux; (ii) during freezing period all three heat fluxes do not vary apparently, in spite of the fact that the negative soil temperature is higher than that not considering soil freeze; (iii) during thawing period, ground heat flux increases, and sensible heat flux decreases, but latent heat flux does not change much; and (iv) during freezing period, soil temperature decreases, though ground heat flux increases.

关键词： land surface model,soil freeze/thaw,GAME/Tibet,simultaneous liquid,vapor and heat transfer.

The principle of relativity, kinematics and algebraic relations

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Science china(physics,Mechanics & Astronomy) 2010年第4期53卷 591-597页

作者： GUO HanYing1, HUANG ChaoGuang2.3. WU HongTu4 & ZHOU Bin5 1institute of Theoretical {2., chinese Academy of {3., Beijing 100190, china 2.1} of high energy {2., chinese Academy of {3., Beijing 100049, china 3.heoretical {2. Center for Science Facilities, chinese Academy of {3., Beijing 100049, china 4Department of Mathematics, Capital Normal University, Beijing 100048, china 5Department of {2., Beijing Normal University, Beijing 100875, china institute of Theoretical physics Chinese Academy of Sciences Beijing China institute of high {2. {3. Chinese Academy of Sciences Beijing China Theoretical physics Center for Science Facilities Chinese Academy of Sciences Beijing China Department of Mathematics Capital Normal University Beijing China Department of physics Beijing Normal University Beijing China

Based on the relativistic principle and the postulate of universal invariant constants (c, l), all kinematic symmetries can be set up as the subsets of the Umov-Weyl-Fock-Hua transformations for the inertial motions. ... 详细信息

关键词： principle of relativity with (c l) Umov-Weyl-Fock-Hua transformations kinematics special relativity triple

Potential energy surfaces for low-lying electronic states of SO_2

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Science china Chemistry 2006年第4期49卷 289-295页

作者： LI Anyang1, SUO Bing2. WEN Zhenyi2.& WANG Yubin2.1. Shanxi Key Laboratory of Physico-inorganic Chemistry, Department of Chemistry, Northwest University, Xi’an 710069, china 2. institute of Modern {2., Northwest University, Xi’an 710069, china Shanxi Key Laboratory of Physico-inorganic Chemistry Department of Chemistry Northwest University Xi’an China institute of Modern physics Northwest University Xi’an China

The potential energy surfaces for the nine low-lying electronic states of SO2.have been constructed by using the multi-reference second order perturbation theory (MRPT2. with the basis set cc-pVTZ. The optimized geometries and the adiabatic excitation energies of these states are in good agreement with experiments and previous calculations. The crossings and avoided crossings dis- played in the potential energy surfaces are expounded.

关键词： cross of PES, MRPT2. SO2 (sulfur dioxide).